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Title:
A COMMUNICATION DEVICE AND A METHOD IN A COMMUNICATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/120519
Kind Code:
A1
Abstract:
A communication device (102; 202; 302) comprising: a millimetre wave antenna arrangement (104) comprising a distributed millimetre wave antenna radiating element (106, 108, 110) and a corresponding fixed millimetre wave antenna radiating element (112, 114, 116); a Radio Frequency Integrated Circuit; wherein the fixed millimetre wave antenna radiating element is arranged together with the Radio Frequency Integrated Circuit (118) on a first substrate (120); wherein the distributed millimetre wave antenna radiating element is arranged on at least one second substrate (122; 124) spaced apart from the first substrate; and a switching arrangement (126) configured to selectively connect either the fixed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit or the distributed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit. An associated method in a communication device, and an associated computer program product.

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Inventors:
LI, Linsheng (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
WANG, Hanyang (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
KHRIPKOV, Alexander (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
TU, Dongxing (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
LUO, Hongting (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
MILOSAVLJEVIC, Zlatoljub (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
Application Number:
EP2017/083832
Publication Date:
June 27, 2019
Filing Date:
December 20, 2017
Export Citation:
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Assignee:
HUAWEI TECHNOLOGIES CO., LTD. (Huawei Administration Building Bantian, Longgang DistrictShenzhen, Guangdong 9, 518129, CN)
LI, Linsheng (Huawei Technologies Sweden AB, Skalholtsgatan 9, Kista, 16440, SE)
International Classes:
H01Q1/22; H01Q1/24; H01Q1/38; H01Q21/00; H01Q21/28; H01Q23/00
Foreign References:
US20100240327A12010-09-23
US20170214121A12017-07-27
US20160172761A12016-06-16
US20160308563A12016-10-20
Other References:
None
Attorney, Agent or Firm:
KREUZ, Georg (Huawei Technologies Duesseldorf GmbH, Riesstr. 8, Munich, 80992, DE)
Download PDF:
Claims:
CLAIMS

1 . A communication device (102; 202; 302) comprising:

a millimetre wave antenna arrangement (104) comprising a distributed millimetre wave antenna radiating element (106, 108, 1 10) and a corresponding fixed millimetre wave antenna radiating element (1 12, 1 14, 1 16);

a Radio Frequency Integrated Circuit (1 18; 207; 408);

wherein the fixed millimetre wave antenna radiating element (1 12, 1 14, 1 16) is arranged together with the Radio Frequency Integrated Circuit (1 18) on a first substrate (120);

wherein the distributed millimetre wave antenna radiating element is arranged on at least one second substrate (122; 124) spaced apart from the first substrate (120); and a switching arrangement (126) configured to selectively connect either the fixed millimetre wave antenna radiating element (1 12, 1 14, 1 16) to the Radio Frequency Integrated Circuit (1 18; 207; 408) or the distributed millimetre wave antenna radiating element (106, 108, 1 10) to the Radio Frequency Integrated Circuit (1 18; 208; 408).

2. The communication device (102; 202; 302) according to claim 1 , further comprising a housing (204) accommodating the millimetre wave antenna arrangement (206), the Radio Frequency Integrated Circuit (1 18), the switching arrangement (212) and a processing unit (214), wherein the Radio Frequency Integrated Circuit (1 18) is connected to the processing unit (214).

3. The communication device (102; 202; 302) according to claims 2, wherein the processing unit (214) comprises a baseband processor on a main Printed Circuit Board (220).

4. The communication device (102; 202; 302) according to claim 3, wherein the main Printed Circuit Board (220) is spaced apart from the first and second substrates.

5. The communication device (102; 202; 302) according to any of the claims 1 to 4, wherein the millimetre wave antenna arrangement (104) comprises a plurality of distributed millimetre wave antenna radiating elements (106, 108, 1 10) including the distributed millimetre wave antenna radiating element (106), and a plurality of corresponding fixed millimetre wave antenna radiating elements (1 12, 1 14, 1 16) including the fixed millimetre wave antenna radiating element (1 12).

6. The communication device (102; 202; 302) according to claim 5, wherein the millimetre wave antenna arrangement (104) comprises a plurality of second substrates (122, 124) including the at least one second substrate (122), the second substrates being spaced apart from one another, and wherein each second substrate is provided with at least one distributed millimetre wave antenna radiating element (106, 108, 124).

7. The communication device (102; 202; 302) according to any of the claims 1 to

6, wherein each distributed millimetre wave antenna radiating element (106, 108) is connected to the switching arrangement (126) by a flexible transmission line (121 ).

8. The communication device (102; 202; 302) according to any of the claims 1 to

7, wherein the switching arrangement (402) comprises a plurality of switches (403, 404, 405, 406), wherein each switch is configured to connect a distributed millimetre wave antenna radiating element (412, 414, 416, 418) to the Radio Frequency Integrated Circuit while disconnecting a fixed millimetre wave antenna radiating element (422, 424, 426, 428) from the Radio Frequency Integrated Circuit, and wherein each switch is configured to disconnect a distributed millimetre wave antenna radiating element from the Radio Frequency Integrated Circuit while connecting a fixed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit.

9. The communication device (102; 202; 302) according to claim 8, wherein the Radio Frequency Integrated Circuit (1 18) comprises a plurality of Radio Frequency channels (430, 432, 434, 436), and wherein each Radio Frequency channel is connected to a switch (403, 404, 405, 406) of the switching arrangement (402).

10. The communication device (102; 202; 302) according to any of the claims 1 to

9, wherein the switching arrangement (126) is arranged on the first substrate (120).

1 1 . The communication device (102; 202; 302) according to any of the claims 1 to

10, wherein the communication device comprises a plurality of Radio Frequency Integrated Circuits, wherein the communication device comprises at least one module (216, 218; 320, 328), each module comprising a millimetre wave antenna arrangement (206), a Radio Frequency Integrated Circuit and a switching arrangement (212).

12. The communication device (102; 202; 302) according to claim 1 1 , wherein the communication device comprises a plurality of modules (216, 218; 320, 328) including the at least one module (216, 218; 320, 328).

13. The communication device (102; 202; 302) according to claim 12, wherein the housing comprises a front (306), a back cover and a surrounding frame (308) which mounts the back cover to the front, wherein the surrounding frame has four corners (310, 312, 314, 316), wherein the first substrate (318) of a first module (320) is located at a first corner (310) whereas the at least one second substrate (322, 324) of the first module is spaced apart from the first corner.

14. The communication device (102; 202; 302) according to claim 13, the at least one second substrate (322, 324) of the first module (320) is arranged adjacent to the surrounding frame (308).

15. The communication device (102; 202; 302) according to claim 13 or 14, wherein the first substrate (326) of a second module (328) is located at a second corner (314) diagonally opposite the first corner (310), whereas the at least one second substrate (330, 332) of the second module is spaced apart from the second corner and arranged adjacent to the surrounding frame (308).

16. The communication device (102; 202; 302) according to any of the claims 1 to 15, wherein the processing unit (214) is configured to control the switching arrangement (212) to connect a distributed millimetre wave antenna radiating element (226, 228, 230, 232) and disconnect a fixed millimetre wave antenna radiating element (234, 236, 238, 240) when a change of a user scenario is detected.

17. The communication device (102; 202; 302) according to claim 16, wherein the change of the user scenario is the blocking of the fixed millimetre wave antenna radiating element (234, 236, 238, 240) by the user’s hand or body.

18. The communication device (102; 202; 302) according to claim 16 or 17, wherein the change of the user scenario is the change of the orientation of the fixed millimetre wave antenna radiating element (234, 236, 238, 240) in relation to a base station antenna to which the communication device connects.

19. A method for a communication device, comprising:

Connecting (501 ) a fixed millimetre wave antenna radiating element which is arranged on the same substrate as a Radio Frequency Integrated Circuit to the Radio Frequency Integrated Circuit; Detecting (502) a change of a user scenario;

Disconnecting (503) the fixed millimetre wave antenna radiating element from the Radio Frequency Integrated Circuit and connecting (504) a corresponding distributed millimetre wave antenna radiating element which is arranged on a sperate substrate as the Radio Frequency Integrated Circuit to the Radio Frequency Integrated Circuit.

20. A computer program with a program code for performing a method according to claim 19 when the computer program runs on a computer or processing unit.

Description:
A COMMUNICATION DEVICE AND A METHOD IN A COMMUNICATION DEVICE

Technical Field

Aspects of the present invention relate to a communication device comprising a millimetre wave antenna arrangement. Aspects of the present invention also relate to a method in a communication device. Further, aspects of the present invention relate to a computer program.

Background of the Invention

In the fifth-generation millimetre wave mobile communication, the radio application requires the use of antenna arrays with multiple radiating elements to meet the requirements of high gain and beam forming. In general, the antenna array is integrated into a module or package together with the Radio Frequency Integrated Circuit (RFIC), or a uniform array is placed at the edges of the communication device. According to the 3GPP definition of performance parameters for the fifth generation (5G) New Radio (NR) User Equipment (UE) beam-forming, the 5G UE shall use omni-coverage millimetre wave antennas to achieve stable communication in all directions and orientations. By“omni coverage” is meant that an antenna radiates equally well in all directions. It is difficult to provide omni-coverage for 5G UE due to the limited space in the UE.

Summary

It has been found by the inventors that the millimetre wave radiation can be easily blocked by the human body, e.g. the hand and/or head. An improved millimetre wave antenna for a mobile device such as a UE is thus required.

An object of the embodiments of the invention is thus to provide an improved millimetre wave antenna arrangement for a mobile device (or communication device).

Another object of the embodiments of the invention is to counteract the effect of the human body’s blocking of the millimetre wave radiation.

According to a first aspect of the invention, at least one of the above-mentioned objects of the present invention is attained by providing a communication device comprising: a millimetre wave antenna arrangement comprising a distributed millimetre wave antenna radiating element and a corresponding fixed millimetre wave antenna radiating element;

a Radio Frequency Integrated Circuit;

wherein the fixed millimetre wave antenna radiating element is arranged together with the Radio Frequency Integrated Circuit on a first substrate;

wherein the distributed millimetre wave antenna radiating element is arranged on at least one second substrate spaced apart from the first substrate; and a switching arrangement configured to selectively connect either the fixed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit or the distributed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit.

Embodiments of the present invention achieve that the antenna coverage performance of the millimetre wave antenna arrangement is improved and can counteract the influence of the human body effect which is caused by a user’s body (e.g. hands or head) blocking antenna elements of a mobile device. In alternative wording, the radiation coverage is expanded, and the human body effect is reduced. When the human body, e.g. a hand, blocks a fixed millimetre wave antenna radiating element, the switching arrangement can disconnect the blocked fixed millimetre wave antenna radiating element and instead connect a distributed millimetre wave antenna radiating element to the RFIC. Further, the total power consumption will not increase or not significantly increase. Hence, the embodiments of the present invention, an improved millimetre wave antenna arrangement with improved omni-coverage is provided.

In a possible implementation form of a communication device according to the first aspect, the communication device comprises a housing accommodating the millimetre wave antenna arrangement, the Radio Frequency Integrated Circuit, the switching arrangement and a processing unit, wherein the Radio Frequency Integrated Circuit is connected to the processing unit. An advantage with this implementation form is that an improved millimetre wave antenna arrangement for a communication device is provided.

In a further possible implementation form of a communication device according to the first aspect, the processing unit comprises a baseband processor on a main Printed Circuit Board. The main Printed Circuit Board may be spaced apart from the first and second substrates. Consequently, the baseband processor may be spaced apart from the first and second substrates. An advantage with this implementation form is that the flexibility of the antenna arrangement is further improved.

In another possible implementation form of a communication device according to the first aspect, the millimetre wave antenna arrangement comprises a plurality of distributed millimetre wave antenna radiating elements including the distributed millimetre wave antenna radiating element, and a plurality of corresponding fixed millimetre wave antenna radiating elements including the fixed millimetre wave antenna radiating element. The plurality of distributed millimetre wave antenna radiating elements may be at least two distributed millimetre wave antenna radiating elements. The plurality of corresponding fixed millimetre wave antenna radiating elements may be at least two corresponding fixed millimetre wave antenna radiating elements. By having at least two distributed millimetre wave antenna radiating elements and at least two fixed millimetre wave antenna radiating elements, the flexibility and efficiency in transmitting and receiving signals to/from a base station is further improved. Advantageously, the switching arrangement is arranged to control the number of distributed millimetre wave antenna radiating elements and the number of fixed millimetre wave antenna radiating elements connected to the RFIC. An advantage with this implementation form is that the flexibility of the antenna arrangement is further improved. Further, the millimetre wave omni-coverage of the communication device is further assured.

In yet another possible implementation form of a communication device according to the first aspect, the millimetre wave antenna arrangement comprises a plurality of second substrates including the at least one second substrate, the second substrates being spaced apart from one another, and each second substrate is provided with at least one distributed millimetre wave antenna radiating element. An advantage with this implementation form is that the flexibility and efficiency of the antenna arrangement is further improved.

In still another possible implementation form of a communication device according to the first aspect, each distributed millimetre wave antenna radiating element is connected to the switching arrangement by a flexible transmission line. An advantage with this implementation form is that the flexibility and efficiency of the antenna arrangement is further improved.

In a further possible implementation form of a communication device according to the first aspect, the switching arrangement comprises a plurality of switches, wherein each switch is configured to connect a distributed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit while disconnecting a fixed millimetre wave antenna radiating element from the Radio Frequency Integrated Circuit, and each switch is configured to disconnect a distributed millimetre wave antenna radiating element from the Radio Frequency Integrated Circuit while connecting a fixed millimetre wave antenna radiating element to the Radio Frequency Integrated Circuit. An advantage with this implementation form is that a further efficient switching arrangement is provided, providing a further improved communication device.

In another possible implementation form of a communication device according to the first aspect, the Radio Frequency Integrated Circuit comprises a plurality of Radio Frequency channels, wherein each Radio Frequency channel is connected to a switch of the switching arrangement. An advantage with this implementation form is that a further efficient switching arrangement is provided, providing a further improved communication device.

In yet another possible implementation form of a communication device according to the first aspect, the switching arrangement is arranged on the first substrate. An advantage with this implementation form is that the switching arrangement is close to the Radio Frequency Integrated Circuit, providing a compact and efficient antenna solution for the communication device.

In still another possible implementation form of a communication device according to the first aspect, the communication device comprises a plurality of Radio Frequency Integrated Circuits, wherein the communication device comprises at least one module, each module comprising a millimetre wave antenna arrangement, a Radio Frequency Integrated Circuit and a switching arrangement. An advantage with this implementation form is that the assembly of the communication device is facilitated.

In a further possible implementation form of a communication device according to the first aspect, the communication device comprises a plurality of modules including the at least one module. An advantage with this implementation form is that the assembly of the communication device is further facilitated.

In another possible implementation form of a communication device according to the first aspect, the housing comprises a front, a back cover and a surrounding frame which mounts the back cover to the front, wherein the surrounding frame has four corners, wherein the first substrate of a first module is located at a first corner whereas the at least one second substrate of the first module is spaced apart from the first corner. An advantage with this implementation form is that a good antenna coverage performance is provided.

In yet another possible implementation form of a communication device according to the first aspect, the at least one second substrate of the first module is arranged adjacent to the surrounding frame. An advantage with this implementation form is that a good antenna coverage performance is provided.

In still another possible implementation form of a communication device according to the first aspect, the first substrate of a second module is located at a second corner diagonally opposite the first corner, whereas the at least one second substrate of the second module is spaced apart from the second corner and arranged adjacent to the surrounding frame. An advantage with this implementation form is that a good antenna coverage performance is provided, and the human body effect can be counteracted in an efficient manner.

It is to be understood that the first and second modules and their parts may be arranged in other suitable ways.

In yet another possible implementation form of a communication device according to the first aspect, the processing unit is configured to control the switching arrangement to connect a distributed millimetre wave antenna radiating element and disconnect a fixed millimetre wave antenna radiating element when a change of a user scenario is detected. An advantage with this implementation form is that a good antenna coverage performance is provided, and the human body effect can be counteracted in an efficient manner. In a further possible implementation form of a communication device according to the first aspect, the change of the user scenario is the blocking of the fixed millimetre wave antenna radiating element by the user’s hand or body, which may be called the human body effect. An advantage with this implementation form is that a further improved antenna coverage performance is provided, and the human body effect can be further counteracted in an efficient manner.

In another possible implementation form of a communication device according to the first aspect, the change of the user scenario is the change of the orientation of the fixed millimetre wave antenna radiating element in relation to a base station antenna to which the communication device connects. An advantage with this implementation form is that a further improved antenna coverage performance is provided.

According to a second aspect of the invention, at least one of the above-mentioned objects of the present invention is attained by providing a method for a communication device, comprising:

Connecting a fixed millimetre wave antenna radiating element which is arranged on the same substrate as a Radio Frequency Integrated Circuit to the Radio Frequency Integrated Circuit;

Detecting a change of a user scenario;

Disconnecting the fixed millimetre wave antenna radiating element from the Radio Frequency Integrated Circuit and connecting a corresponding distributed millimetre wave antenna radiating element which is arranged on a sperate substrate as the Radio Frequency Integrated Circuit to the Radio Frequency Integrated Circuit.

By this method, a further improved antenna coverage performance is provided, and the effect of the human body’s blocking of the millimetre wave radiation can be counteracted.

According to a third aspect of the invention, at least one of the above-mentioned objects of the present invention is attained by providing at least one computer program with a program code for performing a method according to the second aspect of the invention when the computer program runs on a computer or processing unit.

The invention also relates to a computer program, characterized in code means, which when run by processing means causes said processing means to execute any method according to the present invention. Further, the invention also relates to a computer program product comprising a computer readable medium and said mentioned computer program, wherein said computer program is included in the computer readable medium, and comprises of one or more from the group: ROM (Read-Only Memory), PROM (Programmable ROM), EPROM (Erasable PROM), Flash memory, EEPROM (Electrically EPROM) and hard disk drive. “Arranged on” is to be understood as mounted on, formed onto or attached to the respective substrate or board etc. By“spaced apart from” is meant that two, or more, entities or units are separated from one another, i.e. a distance is formed between the two entities. However, they may still be electrically connected, directly or indirectly, to one another. By “connected” is meant that two connected units can be electrically connected directly to one another, e.g. via an electrically conductive path, or indirectly connected/coupled to one another through some electrical means, for example a transformer or capacitor.

The above-mentioned features and implementations, respectively, may be combined in various possible ways providing further advantageous implementations. Further applications and advantages of the present invention will be apparent from the following detailed description.

Brief Description of the Drawings

The appended drawings are intended to clarify and explain different embodiments of the present invention, in which:

Fig. 1 is a schematic view of an embodiment of the communication device according to the present invention with the communication device housing excluded;

Fig. 2 is a schematic illustration of an embodiment of the communication device according to the present invention;

Fig. 3 is schematic illustration of an embodiment of the communication device according to the present invention;

Figs. 4a-4c are schematic block diagrams illustrating an embodiment of the communication device according to the present invention; and

Fig. 5 is a schematic diagram illustrating aspects of the method according to the present invention.

Detailed Description

The communication device 102, 202, 302 herein disclosed may be denoted as a user device, a User Equipment (UE), a mobile station, an internet of things (loT) device, a sensor device, a wireless terminal and/or a mobile terminal, enabled to communicate wirelessly in a wireless communication system, sometimes also referred to as a cellular radio system and especially a LTE or New Radio (NR/5G) radio system. The UEs may further be referred to as mobile telephones or cellular telephones with wireless capability. The UEs in the present context are for example portable, pocket-storable, hand-held, computer-comprised enabled to communicate voice and/or data, via the radio access network, with another entity, such as another receiver or a server.

Fig. 1 schematically illustrates aspects of the communication device 102. The communication device 102 includes a millimetre wave antenna arrangement 104. The millimetre wave antenna arrangement 104 includes three distributed millimetre wave antenna radiating elements 106, 108, 1 10 and three corresponding fixed millimetre wave antenna radiating elements 1 12, 1 14, 1 16. However, the millimetre wave antenna arrangement could also include only one distributed millimetre wave antenna radiating element and only one fixed millimetre wave antenna radiating element. The number of distributed millimetre wave antenna radiating elements and fixed millimetre wave antenna radiating elements can be chosen in dependence on the desired application. The communication device further comprises a Radio Frequency Integrated Circuit, RFIC, 1 18. The fixed millimetre wave antenna radiating elements 1 12, 1 14, 1 16 are arranged together with the RFIC 1 18 on a first substrate 120. In this embodiment the RFIC 1 18 and the fixed millimetre wave antenna radiating elements 1 12, 1 14, 1 16 are arranged on opposite sides of the common first substrate 120. Two of the distributed millimetre wave antenna radiating elements 106, 108 are arranged on a second substrate 122 spaced apart from the first substrate 120. The third distributed millimetre wave antenna radiating element 1 10 is arranged on another second substrate 124 spaced apart from the first substrate 1 18 and the second substrate 122. The first substrate 120 and the second substrate 122 are rigid, whereas the other second substrate 124 is a flexible substrate, e.g. a Flexible Printed Circuit, FPC. The second substrate 122 may be connected to the first substrate 120 by means of a flexible transmission line 121 , e.g. an Intermediate Frequency, IF, cable. Further, the communication device 102 includes a switching arrangement 126 configured to selectively connect either the fixed millimetre wave antenna radiating element 1 12, 1 14, 1 16 to the RFIC 1 18 or the distributed millimetre wave antenna radiating element 106, 108, 1 10 to the RFIC 1 18. Each substrate 120, 122 may be a dielectric substrate. In this embodiment, the switching arrangement 126 is arranged on the first substrate 120.

With reference to Fig. 2, the communication device 202 further comprises a housing 204. The housing 204 accommodates the millimetre wave antenna arrangement 206, the RFIC 207, the switching arrangement 212 and a processing unit 214, wherein the RFIC 207 is connected to the processing unit 214 via a cable 215, e.g. an IF cable. The communication device 202 comprises at least one module. In the embodiment of Fig. 2, the communication device 202 comprises two modules 216, 218. Each module 216, 218 includes a millimetre wave antenna arrangement 206, an RFIC 207 and a switching arrangement 212. The processing unit 214 may comprise a baseband processor (not shown) on a main Printed Circuit Board, PCB 220. The processing unit 214 is configured to control the switching arrangement 212 of each module 216, 218 to connect a distributed millimetre wave antenna radiating element 226 and disconnect a fixed millimetre wave antenna radiating element 234 when a change of a user scenario is detected and vice versa. The change of the user scenario may be the blocking of the fixed millimetre wave antenna radiating element 234 by the user’s hand or body. However, the change of the user scenario may also be the change of the orientation of the fixed millimetre wave antenna radiating element 234 in relation to a base station antenna to which the communication device 202 connects. In the example of Fig. 2, each millimetre wave antenna arrangement 206 comprises four distributed millimetre wave antenna radiating elements 226, 228, 230, 232 and four corresponding fixed millimetre wave antenna radiating elements 234, 236, 238, 240. The fixed millimetre wave antenna radiating elements 234, 236, 238, 240 are provided on the first substrate. The distributed millimetre wave antenna radiating elements 226, 228, 230, 232 are provided on at least one second substrate. The main PCB 220 is separated from the first and second modules 216, 218, and thus also separated from first substrate and the second substrates.

With reference to Fig. 3, an example of the arrangement of the modules including distributed and fixed millimetre wave antenna radiating element is schematically illustrated. The housing 304 of the communication device 302 comprises a front 306, a back cover (not shown) and a surrounding frame 308 which mounts the back cover to the front 306. The surrounding frame 308 has four corners 310, 312, 314, 316. The first substrate 318 of a first module 320 is located at a first corner 310 whereas the two second substrates 322, 324 of the first module 320 are spaced apart from the first corner 310, but are connected, e.g. by an FPC, to the first substrate 318. The first substrate 326 of a second module 328 is located at a second corner 314, whereas the two second substrates 330, 332 of the second module 328 are spaced apart from the second corner 314, but are connected to the first substrate 326 of the second module 328, e.g. by an FPC. The second substrates 322, 324, 330, 332 of the first and second modules 320, 328 are arranged adjacent to the surrounding frame 308, and can be placed on either the display side/front 306 or on the backside of the communication device 302. The first substrate 326 of the second module 328 is located at a corner 314 diagonally opposite the first corner 310. Each second substrate 322, 324, 330, 332 includes a plurality of distributed millimetre wave antenna radiating elements. Each first substrate 318, 326 includes at least one RFIC and a plurality of fixed millimetre wave antenna radiating elements. It is to be understood that other locations of the modules are possible. The first substrates of the first module and the second module, respectively, may e.g. be placed in two adjacent corners of the communication device. Placing the first substrate of a module close to a side or a corner is advantageous because of a lower risk of blockage of the antenna elements by the user’s hands or head.

Figs. 4a-4c schematically illustrate the switching in an embodiment of the communication device. The switching arrangement 402 comprises a plurality of switches 403, 404, 405, 406. Each switch 403, 404, 405, 406 is configured to connect a corresponding distributed millimetre wave antenna radiating element 412, 414, 416, 418 of the millimetre wave antenna arrangement 419 to the RFIC 408 while disconnecting a corresponding fixed millimetre wave antenna radiating element 422, 424, 426, 428 of the millimetre wave antenna arrangement 419 from the RFIC 408. Vice versa, each switch 403, 404, 405, 406 is configured to disconnect a corresponding distributed millimetre wave antenna radiating element 412, 414, 416, 418 from the RFIC 408 while connecting a corresponding fixed millimetre wave antenna radiating element 422, 424, 426, 428 to the RFIC 408. Hence, for each pair of fixed and distributed millimetre wave antenna radiating element a corresponding switch is provided.

With reference to Fig. 4a, all four fixed millimetre wave antenna radiating elements 422, 424, 426, 428 are connected to the RFIC 408, whereas all four distributed millimetre wave antenna radiating element 412, 414, 416, 418 are disconnected from the RFIC 408. This can be considered as a starting point of a switching scenario sequence, when the user has the communication device in his pocket and is called up. The user grabs the communication device with his right hand to answer the call and then holds the communication device next to his head.

When the user is talking into the communication device, the processing unit 214 receives information that two fixed millimetre wave antenna radiating elements 422, 424 are blocked. The two fixed millimetre wave antenna radiating elements 422, 424 may be blocked by the user’s head or hand. Thus, the processing unit 214 controls the switching arrangement 402 to disconnect said fixed millimetre wave antenna radiating elements 422, 424 from the RFIC 408 and instead to connect two distributed millimetre wave antenna radiating element 412, 414 to the RFIC 408. This scenario is shown in Fig. 4b, where two fixed millimetre wave antenna radiating elements 426, 428 are still connected to the RFIC 408, and two distributed millimetre wave antenna radiating elements 416, 418 are still disconnected from the RFIC 408.

When the user ends the conversation and hangs up, he grabs the communication device with his both hands to watch a video or read something on the screen of the communication device. The processing unit 214 receives information that the two fixed millimetre wave antenna radiating elements 426, 428, which still are connected, are blocked. The two fixed millimetre wave antenna radiating elements 426, 428 may be blocked by the user’s hands. Thus, the processing unit 214 controls the switching arrangement 402 to disconnect said remaining fixed millimetre wave antenna radiating elements 426, 428 from the RFIC 408 and instead to connect two distributed millimetre wave antenna radiating element 416, 418 to the RFIC 408. This scenario is shown in Fig. 4c, where all four fixed millimetre wave antenna radiating elements 422, 424, 426, 428 now are disconnected from the RFIC 408, whereas all four distributed millimetre wave antenna radiating element 412, 414, 416, 418 are connected to the RFIC 408. It is to be understood that alternative switching scenarios and alternative millimetre wave antenna arrangements are possible. With reference to Fig. 4c, the RFIC 408 may comprise a plurality of Radio Frequency, RF, channels 430, 432, 434, 436. Each RF channel 430, 432, 434, 436 is connected to a switch 403, 404, 405, 406 of the switching arrangement 402.

With reference to Figs. 4a-4c, the millimetre wave antenna arrangement may, e.g., comprise fewer or more fixed millimetre wave antenna radiating elements compared to Figs. 4a-4c. The millimetre wave antenna arrangement may comprise fewer or more distributed millimetre wave antenna radiating elements compared to Figs. 4a-4c. The number of switches of the switching arrangement 402 can be chosen accordingly.

With reference to Fig 5, a schematic diagram illustrates aspects of the method according to the invention. The method in the communication device comprises the steps of:

Connecting, 501 , a fixed millimetre wave antenna radiating element which is arranged on the same substrate as a RFIC to the RFIC;

Detecting, 502, a change of a user scenario (which can be a scenario disclosed above);

Disconnecting, 503, the fixed millimetre wave antenna radiating element from the RFIC and connecting, 504, a corresponding distributed millimetre wave antenna radiating element which is arranged on a sperate substrate as the RFIC to the RFIC.

Provided is also at least one computer program product directly loadable into the internal memory of at least one digital computer or processing unit, comprising software code portions for performing the steps of the above-mentioned method when the product is/are run on the computer or processing unit.

It is to be understood that the millimetre wave antenna arrangement may include a plurality of distributed millimetre wave antenna radiating elements including the distributed millimetre wave antenna radiating element. It is to be understood that the millimetre wave antenna arrangement may include a plurality of corresponding fixed millimetre wave antenna radiating elements including the fixed millimetre wave antenna radiating element. It is to be understood that the millimetre wave antenna arrangement may include a plurality of second substrates including the at least one second substrate, the second substrates being spaced apart from one another. Each second substrate may be provided with at least one distributed millimetre wave antenna radiating element.

The fixed millimetre wave antenna radiating elements may be have a broadside radiation pattern and/or an end-fire radiation pattern.

Each of the above-mentioned antenna radiating elements may e.g. be a patch antenna, a printed antenna, a dipole antenna or a slot antenna etc. Different mixtures of the mentioned antenna versions, and others, are possible. The features of the different embodiments of the communication device, method and the at least one computer program disclosed above may be combined in various possible ways providing further advantageous embodiments.

Finally, it should be understood that the invention is not limited to the embodiments described above, but also relates to and incorporates all embodiments within the scope of the appended independent claims.