BACKGROUND

[0001] In the recent years, consumer electronic devices find ubiquitous use for various purposes including communication, consumption of entertainment media, and gaming. All such consu mer electronic devices, may operate wireiessly for transmission and reception of digital data using an antenna.

BRIEF DESCRIPTION OF FIGURES

[0002] The detailed description is provided with reference to die accompanying figures. It should be noted mat the description and the figures am merely examples of the present subject matter, and are not meant to represent the subject matter itself.

[0003] Fig. 1 illustrates a block diagram of a device to regulate specific absorption rate (SAR). according to an example.

[0004] Fig. 2 illustrates a detailed block diagram of the device of Fig. 1, according to ah example.

[00053 Fig. 3 illustrates a schematic of an antenna assembly for the device, according to an example.

[0006] Fig, 4 illustrates a network environment to regulate SAR value of an antenna of the device, according to an example.

[0007] Throughout the drawings, identical reference numbers designate similar, but not necessarily identical, elements. The figures are not necessarily to scale, and the size of some parts may be exaggerated to more clearly illustrate the example shown. Moreover, the drawings provide examples and/or implementations consistent with the description; however, the description is not limited to the examples and/or implementations provided in the drawings. DETAILED DESCRIPTION

[0008] Electronic devices capable of wireless communication are provided with an antenna for wireless communication. Every antenna has an associated specific absorption rate (SAR) which is a measure of the rate at which energy is absorbed by a human body, when exposed to a radio frequency (RF) electromagnetic field. Such RF electromagnetic field is generated due to transmission by that antenna. To protect the users from the adverse effects of RF electromagnetic fields on the human body, a standard range or vaiue of SAR has been prescribed resulting in a focus on controlling the SAR values of antennas during transmission. Developments in antenna design aim at, among other things, reducing the SAR value of antennas during transmission. As such, reducing SAR value may involve a modification in the antenna design to tune antenna impedance. However, tuning antenna impedance may adversely affect radiation distribution or radiation pattern of the antenna, thereby impacting transmission and transmission efficiency.

[0009] Certain other techniques may involve using capacitor elements in the antenna circuit for tuning the antenna impedance. However, such permanent modifications in the antenna circuitry may also impact the antenna efficiency by affecting the shape of radiation pattern either during reception or transmission, or both. Generally, once the shape of radiation distribution of the antenna is set, no further modifications may be carried out so that the initial setting of the shape of radiation distribution and optimal efficiency of transmission or reception is maintained. If at this stage change is effected, it may adversely affect the efficiency of transmission, reception, or both, thereby making the antenna operation less effective.

[0010] Approaches for selective regulation of SAR value associated with an antenna are described. The approaches involve determining whether SAR vaiue for an antenna is to be regulated and selectively regulating SAR vaiue, based on certain conditions. The SAR value may be regulated by varying input power to the antenna. Since the input power to the antenna is proportional to the SAR value, a reduction in the input power leads to reduction in the SAR value. However, at the same time, by selectively regulating SAR value, the present subject matter prevents sacrificing the input power In certain cases, where the transmission by the antenna may be adversely affected.

[0011] The abovementioned approaches may be implemented in an antenna assembly. In one example, the antenna assembly includes an antenna and an antenna circuit. The antenna circuit has multiple paths with each path having a different electrical resistance value. In operation, the antenna circuit may select one of the multiple paths for routing the current to the antenna, based on whether the SAR regulation is to be achieved or not, and the extent to which the SAR regulation is to be achieved. Accordingly, the path through which current is routed is selected based on an electrical resistance value of the path. In other words, the input power to the antenna may be controlled by selecting an electrical resistance that the current supplied to the antenna encounters on its path to the antenna.

[0012] I" ^one example, the antenna circuit includes a dynamic switching element which selectively routes the current to the antenna through one of the multiple paths in the antenna circuit, but without considerable effect on the operation of the antenna. For example, the operation of the antenna remains unaffected when operating in receiving mode. In other words, the dynamic switching element achieves the selection of paths in a manner mat does not change the antenna operation in the reception mode, since SAR value is immaterial during reception. In such a case, the dynamic switching element can allow the current to be supplied to the antenna through a first path having a first electrical resistance value. In one example, the first electrical resistance value may be almost zero or negligible electrical resistance value, referred to as zero electrical resistance value. In an example, the first path may be formed as a wire or a track on a printed circuit board. Accordingly, owing to resistive properties of the first path, for example, a material of the first path, a cross-sectional area, and a length of the first path, the first path may offer a finite amount of electrical resistance; however, in comparison to resistors, that finite amount can be considered as being negligible, which is also referred to as zero electrical resistance, herein. [0013] As explained above, since there is no change in the Input power to the antenna when provided current through the first path, the SAR value may remain unregulated when the antenna is operating in the reception mode. As mentioned previously, the SAR value is indicative of the adverse effects of electromagnetic radiations from the antenna during transmission and such effects may not be present during reception by the antenna.

[0014] However, in said example, the dynamic switching element can perform selection among the multiple paths in certain instances when an instantaneous SAR value of the antenna exceeds a predefined threshold value. The instantaneous SAR value can be a SAR value of the antenna which is constantly monitored. However, any other SAR value associated with the antenna, which can be monitored for SAR regulation of the antenna, may be employed.

[0015] According to the above example, in the transmission mode, the dynamic switching element does not exercise the selection of path if the instantaneous SAR value of the antenna is within a threshold limit In the transmission mode, a determination may be made to ascertain the SAR value and, if the instantaneous SAR value is within a threshold limit, no further action may be taken. Therefore, in this case also, the dynamic switching element in the antenna circuit allows the current to be routed through tile path having the first electrical resistance value. In one example, the path having the first electrical resistance value may be a default path which can be the default route for supplying current to the antenna when the SAR value remains unregulated. In an example, the threshold limit can be prescribed by a regulatory authority as part of standards,

[0016] On the other hand, when the instantaneous SAR value goes beyond a predefined value during transmission by the antenna, the dynamic switching element may select one of the multiple paths and routes the current via a path having a second electrical resistance value, for instance, by way of a resistor element connected therein, for achieving a drop in the input power to the antenna, thereby regulating the SAR value. According to an example, the second electrical resistance value is greater than the first electrical resistance value.

[0017] In an example, the different electrical resistance values in different paths may be effected by using a distinct resistor element in each electrical path, in another example, the circuit may include a variable-resistance component, which may be operated to vary the resistance in the circuit to control the input power to the antenna, and hence, regulate the SAR value of the antenna.

[0018] As is apparent from above, the choice of path for routing the current is not only based oh the mode of operation, i.e., reception or transmission, but also on whether the SAR reduction or input power reduction is to be performed, in any case, the transmission remains unaffected as long as the instantaneous SAR value is within limits, and the radiation pattern of the antenna remains unaffected in reception as well as transmission mode. As also mentioned previously, the reception operation of the antenna remains unaffected altogether. Since the present subject matter does not involve any modification in the antenna design, the operational capability of the antenna remains unaffected. For example, when the SAR value is reduced by reducing the input power, the shape of the antenna radiation pattern remains unchanged. As explained above, maintaining the shape of the radiation distribution, allows the antenna to operate efficiently during reception as well as during transmission.

[0019] The above aspects are further illustrated in the figures and described in the corresponding description below. It should be noted that the description and figures merely illustrate principles of the present subject matter. Therefore, various arrangements that encompass the principles of the present subject matter, although not explicitly described or shown herein, may be devised from the description and are included within its scope. Additionally, the word "coupled" is used throughout for clarity of the description and may include either a direct connection or an indirect connection.

[0020] Fig. 1 illustrates a block diagram of a device 100 to regulate specific absorption rate (SAR) value, according to an example of the present subject matter. The device 100 may be any electronic device capable of wirelessly communicating and may include, for example, devices such as electronic book readers, cellular phones, personal digital assistants (PDAs), portable media players, tablet computers, and laptop computers. In the example illustrated in Fig. 1, the device 100 has a controller 102 and an antenna assembly 104 coupled to the controller 102. Hie antenna assembly 104 may include an antenna 106 and an antenna circuit 108. The antenna circuit 108 may include multiple other components (not shown in FIG. 1 ) which implement the operation of the antenna. The antenna circuit 108 may further include a dynamic switching element 110 and a plurality of path(s) 112 or conductive connections of the antenna circuit 108. The plurality of paths 112 are collectively referred to as paths 112 and individually referred to as path 112, henceforth. The controller 102 and the dynamic switching element 110 of the antenna circuit 108 may cooperate in order to regulate a SAR value associated with the antenna 106 using the antenna circuit 108, as explained further.

[0021] According to an aspect a first path from amongst the plurality of paths 112 in the antenna circuit 108 may have a first electrical resistance value. In can example, the first path can be a zero-resistance path, i.e., having a negligible electrical resistance value. For example, the first path can have an electrical resistance value between about 0.1 Ohm and 0.5 Ohm for direct current On the other hand, a second path from amongst the plurality of paths 112 may have a distinct resistor connected therein and the second path can have a second electrical resistance value which is greater than the first electrical resistance value of the first path. In addition, the remaining paths 112 may each have a resistor connected therein, and each resistor, and thereby each path 112, has a different electrical resistance value. The dynamic switching element 110 may select the path for supplying current to the antenna 106 based either on a mode of operation of the antenna 106, i.e., whether the antenna 106 is operating in a reception mode or a transmission mode.

[0022] The dynamic switching element 110 dynamically routes current supply to the antenna 106 through one of the plurality of paths 112, According to an aspect, the dynamic switching element 110 selects a first path and a second path from the plurality of paths 112 of the antenna circuit 108. The value of electrical resistance of the path chosen by the dynamic switching element 110 facilitates in regulating the SAR value associated with the antenna 106 by controlling an input power to the antenna 106.

[0023] Additionally or alternatively, the dynamic switching element 110 may select the path 112 for supplying current to the antenna 106 on the basis of a instantaneous SAR value associated with the antenna 106. Hie instantaneous SAR value can be an instantaneous SAR value of the antenna 106 which is constantly monitored. In other words, the dynamic switching element 110 may use the instantaneous SAR value of the antenna 106 as a basis for the selection of the path 112 either in addition to or instead of the mode of operation of the antenna 106. Further, the dynamic switching element 110 may select the path 112 on the basis of a combination of the mode as well as the instantaneous SAR value of the antenna 106. In the description of the present subject matter provided henceforth, the term instantaneous SAR value of the antenna 106 refers to the instantaneous SAR value, as an example. However, the instantaneous SAR value can be any other SAR value associated with the antenna 106, which is to be monitored for regulating the SAR value of the antenna 106.

[0024] In operation, the controller 102 may determine the mode of operation of the antenna 106 or the instantaneous SAR value associated with the antenna 106, For example, the controller 102 may determine whether the antenna 106 is operating in reception mode or in transmission mode, and may determine whether the instantaneous SAR value associated with the antenna 106 is within a threshold limit or not. In an example, the threshold limit can be prescribed by a regulatory authority as part of standards. Based on the mode of operation or the instantaneous SAR value or both, the oontroler 102 may determine which path 112 from amongst the paths 112 to choose. The controller 102, may accordingly, activate the dynamic switching element 110 for dynamically routing the current through one of selected paths 112. The operation of the controller 102 and the dynamic switching element 110 for the selection of the path 112 is explained further in detail with reference to Fig.2 and Fig.3, in accordance with an example the present subject matter. [0025] Fig.2 illustrates a detailed Mock diagram of me device 100, according to an example of the present subject matter, showing the components of the device 100 in addition to those shown in Fig. 1. As shown in Fig.2, in addition to the controller 102 and the antenna assembly 104, the device 100 includes a sensing unit 200 and memory 202.

[0026] In an example, the controller 102 may include a microcontroller, a microcomputer, a microcontroller, a digital signal controller, a central processing unit, a state machine, a logic circuitry, and/or any other device that may manipulate signals and data based on computer-readable instructions.

[0027] The memory 202, communicatively coupled to the controller 102, may include a non-transitory computer-readable medium including, for example, volatile memory, such as Static Random-Access Memory (SRAM) and Dynamic Random-Access-Memory (DRAM), and/or non-volatile memory, such as Read- Only-Memory (ROM), erasable programmable ROM, flash memories, hard disks, optical disks, and magnetic tapes. Further, the memory 202 includes data 204 that includes data mat is generated as a result of the functionalities carried out by the device 100 and its sub-components. The data 204 may include SAR data 206, mode data 208, and other data 210. The other data 210 may include data generated arid saved by the controller 102 to provide various functionalities.

[0028] In operation, the components of the device 100 regulate the SAR value associated with the antenna 106 by selectively routing current to the antenna 106 through one of the paths 112 of the antenna circuit 108. As explained earlier, each path 112 of the antenna circuit has a different electrical resistance value. The selective routing of current controls the input power to the antenna 106, owing to the electrical resistance of the selected path, which, in turn, achieves regulation of SAR value of the antenna 106.

[0029] This functionality is supplemented by constant monitoring of the operation mode of the antenna 106 and of the instantaneous SAR value associated with the antenna 106. For example, the sensing unit 200 constantly determines the mode of operation of the antenna 106, i.e., whether the antenna 106 is operating in reception mode or in transmission mode. In addition, the sensing unit 200 also constantly determines the instantaneous SAR value associated with the antenna 106. For example, for monitoring the instantaneous SAR value of the antenna 106, the sensing unit 200 may monitor the current being supplied to the antenna 106 which is directly proportional to the input power to the antenna 106, which in turn is directly indicative of the SAR value of the antenna 106. The sensing unit 200 may store, retrieve, and access the information regarding the mode of the antenna 106 from the mode data 208 and regarding the SAR value, such as the threshold SAR value, from the SAR data 206.

[0030] The dynamic switching element 110, working under instructions from the controller 102, achieves the selection of path 112 to regulate the SAR value, in response to determining mat the antenna 106 is operating in the transmission mode and the instantaneous SAR value is beyond a threshold value, in response to the controller 102 determining that the instantaneous SAR value is beyond the threshold value in the transmission mode of the antenna 106, the controller 102 may trigger the dynamic switching element 110 to execute dynamic selection of a path 112. For example, the controller 102 determines that the mode of operation of the antenna 106 as sensed by the sensing unit 200 and determines the instantaneous SAR value sensed by the sensing unit 200 and the threshold value stored in the SAR data 206. In one example, the controller 102 may continuously monitor the SAR value recorded by the sensing unit 200 and may periodically compare with the predefined SAR value. In response to determining the monitored SAR value to be greater than the predefined value in the transmission mode, the controller 102 may generate control instruction for the dynamic switching element 110.

[0031] The control instructions are such that when executed, affect the switching through the dynamic switching element 110. Switching may be considered as selection of the path 112 from amongst the plurality of paths 112 for supplying current to the antenna 106. On switching, the dynamic switching element 110 may route the current via a path 112 having a certain electrical resistance value, i.e., by way of the resistor connected therein. The supply of current to the antenna 106 through the path having a resistor therein may result In a drop in the input power to the antenna 106, thereby causing a reduction in the SAR value of the antenna 106. The path 112 selected for routing the current to the antenna 106 may be based on the extent of reduction in the SAR value, i.e., on the basis of the electrical resistance value of the path 112. The electrical resistance value of the path 112 can be understood as the electrical resistance value of the resistor connected in the path 112. in one example, the dynamic switching element 110 may be a controller-regulated RF switch (radio frequency switch).

[0032] However, in case that either the antenna 106 is operating in the reception mode or the instantaneous SAR value of the antenna 106 is below the threshold value in the transmission mode, controller 102 may bigger the dynamic switching element 110 to execute selection of path for supplying current to the antenna 106 in such a way that the operation of the antenna 106 remains unaffected. This is because in the reception mode and when the instantaneous SAR value is below the threshold value, there is no relevance of SAR value regulation. Any regulation or change in operation of the antenna 106 in such situations may lead to ineffectiveness in the operation.

[0033] Therefore, in both the above cases, i.e., when the antenna 106 is operating in reception mode or the instantaneous SAR value is below the threshold value in the transmission mode, the controller 102 may generate control instructions for the dynamic switching element 110 to route the current through the path having zero electrical resistance value, i.e., through the zero-resistance path 112. The routing of the current through the zero -resistance path 112 does not affect the input power to the antenna 106. In an example, the zero-resistance path 112 can be formed using an electrical connecting wire without any other electrical element, such as a resistor or capacitor, in that wire. As will be understood, the wire may offer a definite amount of electrical resistance, for instance, owing to properties of material of the wire, cross-sectional area of the wire, and geometry of the wire; however, in comparison to resistors, the wire can have negligible electrical resistance value, which is also referred to as zero electrical resistance, herein. For example, the zero-resistance path 112 can have ah electrical resistance value between about 0.1 Ohm and 0.5 Ohm for direct current

[0034] In another example, when the SAR value is not to be regulated, the dynamic switching element 110 may not be triggered at all and the current may be allowed to be supplied to the antenna through a default path. As explained above, the default path may be the zero-resistance path 112. Therefore, in such a case, i.e., in response to determining that the antenna 106 is operating in the reception mode or that the instantaneous SAR value of the antenna 106 is below the threshold value, the dynamic switching element 110 may become inactive in the antenna circuit 108, so as to allow the current supply to the antenna 106 through the default path.

[0035] Accordingly, the controller 102 triggers the dynamic switching element 110 to regulate SAR value, which in turn inevitably affects antenna operation. This is achieved in response to the controller 102 determines that the antenna 106 is operating in the transmission mode and the instantaneous SAR value is beyond a threshold limit. However, when the conditions are not met, the antenna operation remains unaffected. According to an aspect, with such a regulation of the SAR value, the shape of the radiation pattern or distribution pattern associated with the antenna 106 is also unaffected whether the antenna 106 is operating in reception or transmission mode.

[0036] In one example, while the sensing unit 200 constantly monitors the instantaneous SAR value of the antenna 106, in another example, it may do so during the transmission mode and not in the reception mode. In other words, in response to determining that the antenna is operating in the reception mode, the sensing unit 200 may not monitor the instantaneous SAR value of the antenna 106.

[0037] Fig. 3 illustrates a schematic of the antenna assembly 104 for the device 100, according to another example of the present subject matter. The antenna assembly 104 includes the antenna 106 and the antenna circuit 108. The antenna circuit 108 may include the paths 112 and the dynamic switching element 110, as previously. In the present example, the paths 112 of the antenna circuit 108 include a first path 300 and a second path 302. The first path 300 may be a path having zero electrical resistance value, i.e., the zero-resistance path. As explained earlier, the first path may have negligible electrical resistance value and is, therefore, referred to as having zero electrical resistance value, in an example, the first path 300 can have an electrical resistance value between about 0.1 Ohm and 0,5 Ohm for direct current The second path 302 may have a resistor connected therein.

[0038] The dynamic switching element 110 may dynamically route current supply to the antenna 106 through the first path 300 or the second path 302, for regulating SAR value associated with the antenna 106. The dynamic switching element 110 may, as explained earlier, select the path to provide current supply to the antenna 106, based on the mode of operation of the antenna 106 or the instantaneous SAR value associated with the antenna 106, or both. As explained previously, the dynamic switching element 110 supplies current to the antenna 106 through the first path in response to determining that the antenna is in reception mode or that the instantaneous SAR value associated with the antenna 106 is within a threshold limit while the antenna 106 is operating in the transmission mode.

[0039] Further, in order to expand the functionality of the antenna assembly 104 to regulate the SAR value of the antenna 106, the resistor element in the second path 302 may be a variable resistance component such as a digitally controlled variable resistance, a rheostat, and the like. Accordingly, during operation, the dynamic switching element 110 may, firstly, select the second path for supplying current to the antenna 106 based on that the reduction in SAR value of the antenna 106 is to be achieved, and secondly, select the resistance of the second path 302 based on the extent of reduction in the input power to the antenna 106.

[0040] Fig. 4 illustrates an example of the SAR value regulation, as envisaged by the present subject matter. Consider an example, where the device 100 is a personal computer (PC) and has two configurations- a laptop configuration in which a first amount of SAR value reduction has to be achieved, and a tablet configuration in which a second amount of SAR value reduction is to be exercised during transmission. Ail this information may be stored in the memory 202, i.e., in the SAR data 206 and the mode data 208. The mode of the PC can be monitored by the sensing unit 200. in an example, the sensing unit 200 may be a G-sensor (acceierometer) which is used to determine which configuration the device 100 is operating in. in another example, the sensing unit 200 may include proximity sensors which are activated if the distance between a user's body and the device 100 is less than a predefined triggering distance, for instance, 10 millimeters (mm).

[0041] For such a PC, the sensing unit 200 may not monitor the instantaneous SAR value as long as the sensing unit 200 determines that the mode of operation of the PC is reception, irrespective of whether the configuration of the PC is laptop or tablet. In such a case, the current can be routed to the antenna through the default path, for example, the first path 300 having zero or negligible resistance, in an example, in such a situation, the dynamic switching element 110 may become inactive, i.e., is not triggered by the controller 102, so as to allow the current to be routed through the default path.

[0042] On the other hand, in response to the sensing unit 200 determining that the PC is in the transmission mode, the sensing unit 200, and therefore, the controller 102, may constantly monitor the instantaneous SAR value of file antenna 106 against the threshold SAR value. However, as long as the instantaneous SAR value of the antenna 106 is below the threshold SAR value, the current is routed to the antenna 106 through the default path, i.e., the first path 300, as mentioned above. In an example, the first path 300 can have a first electrical resistance value. For instance, the first electrical resistance value is negligible or zero, as explained previously. In other words, in said example, in the reception mode of the antenna 106 or when the instantaneous SAR value of the antenna is 106 below the threshold in transmission mode, the dynamic switching element 110 becomes inactive and has no roie to play in regulating the SAR value to avoid unnecessary disturbance in tile operation of the antenna 106. [0043] Further, In the transmission mode of the antenna 106, in response to the sensing unit 200 determining that the instantaneous SAR value is beyond the threshold value, the sensing unit 200 can further determine the configuration of the PC. in case the configuration is determined to be laptop, the controller 202 can trigger the dynamic switching element 110 to route the current to the antenna 106 through the second path 302 having a first resistor 402. In said example, the first resistor 402 and, therefore, the second path 302 can have a second electrical resistance value of 1 Ohm. In another case, in response to the sensing unit 200 determining that the PC is transmitting in the tablet configuration and that the instantaneous SAR value is beyond the threshold value, Hie controller 202 can trigger the dynamic switching element 110 to supply the current to the antenna 106 through a third path 404 having a second resistor 406. in said example, the second resistor 406, and therefore, the third path 404 can have a third electrical resistance value of 2 Ohm. in said example, the third electrical resistance vaiue is greater than the second electrical resistance vaiue, and the second electrical resistance value is greater than the first electrical resistance value.

[0044] Fig. 5 illustrates a network environment 500 using a non-transitory computer readable medium 502 for regulating SAR vaiue of an antenna 106, according to an example of the present subject matter. The network environment 500 may be a public networking environment or a private networking environment. In one example, the network environment 500 includes a processing resource 504 communicatively coupled to the non-transitory computer readable medium 502 through a communication link 506.

[0045] For example, the processing resource 504 may be a processor, for instance, the controller 102* Of a computing system. The non-transitory computer readable medium 502 may be, for example, an internal memory device or an external memory device, in one example, the communication link 506 may be a direct communication link, such as one formed through a memory read/write interface. In another example, the communication link 506 may be an indirect communication link, such as one formed through a network interface. In such a case, the processing resource 504 may access the non-transitory computer readable medium 502 through a network 508. The network 508 may be a single network or a combination of multiple networks and may use a variety of communication protocols.

[0046] The processing resource 504 and the non-transitory computer readable medium 502 may also be communicatively coupled to data sources 510 over the network 508. The data sources 510 may include, for example, databases and computing devices. The data sources 510 may be used by the database administrators and other users to communicate with the processing resource 504.

[0047] In one example, the non-transitory computer readable medium 502 includes a set, of computer readable instructions, such as a switching engine 512. The set of computer readable instructions, referred to as instructions hereinafter, may be accessed by the processing resource 504 through the communication link 506 and subsequently executed to perform acts for network service insertion.

[0048] For discussion purposes, the execution of the instructions by the processing resource 504 has been described with reference to various components introduced earlier with reference to description of Fig. 1, Fig. 2, and Fig. 3.

[0049] On execution by the processing resource 504, the switching engine 512 may provide triggers to the dynamic switching element 110 for routing the current to the antenna 106, tor thereby regulating the SAR value associated with the antenna 106. For example, the switching engine 512 may determine a mode of operation of an antenna 106 or an instantaneous SAR value associated with the antenna 106, or both for the antenna 106 in the antenna assembly 104. The antenna 106 is coupled to a first path 300 having a zero-electrical resistance value and a second path 302 having a resistor element connected therein. For example, the switching engine 512 may be operabiy coupled to a sensing unit 200 which may monitor the mode of operation of the antenna 106 as well as the instantaneous SAR value associated with the antenna 106.

[0050] Further, the switching engine 512 may exercise a control on the selection of route or path 112 for supplying current to the antenna 106, i.e., control whether the current to the antenna 106 is to be supplied through the zero- resistance path or otherwise. Accordingly, the switching engine 512 may dynamically regulate the SAR value associated with the antenna 106 by exercising such control. In one case, tine switching engine 512 may route the current to the antenna 106 through the first path 300 when the mode of operation of the antenna 106 Is transmission mode but the instantaneous SAR value associated with the antenna 106 is within the threshold limit. In another case, the switching engine 512 may provision the supply of current to the antenna 106 through the first path 300 when the antenna 106 is operating in the reception mode. As explained earlier, the regulation of die SAR value of the antenna 106 is immaterial in the reception mode.

[0051] On the other hand, the switching engine 512 may route tile supply of current to the antenna 106 through the second path 302 when the antenna 106 is operating in the transmission mode and the instantaneous SAR value associated with the antenna 106 is beyond the threshold limit. In such a case, the switching engine 512 allows selection of path to supply current to the antenna 106 In a way to reduce the Input power to the antenna 106, in turn, in order to regulate the SAR value associated with the antenna 106.

[0052] Although aspects of the regulating SAR value have been described in language specific to structural features and/or methods, it is to be understood that the appended claims are not limited to tine specific features or methods described. Rather, the specific features and methods are disclosed as examples of aspects for regulating SAR value.