Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 551 - 600 out of 2,794

Document Document Title
WO/2000/031822A1
Disclosed is a broadband, miniaturized, slow-wave antenna (100) for transmitting and receiving radio frequency (RF) signals. The slow-wave antenna comprises a dielectric substrate (106) with a traveling wave structure mounted on one surf...  
WO/2000/031826A1
A compact broadband log-periodic antenna (5) for transmitting and receiving frequencies between 0.5 to 18 GHz. The antenna comprises two dielectric substrates (10, 12) bonded together, both substrates comprise a first group of dipole ele...  
WO2000011748A3
The present invention relates to problems with how to achieve a reliable and efficient connection between circuitry in a radio communication device and an extendable and retractable antenna device, which is operable in both extended and ...  
WO/2000/030207A1
A pan-shaped small reflection board (9) provided below a rod-like satellite communication antenna (7) stored facing downward on standby and held, in order to improve a signal receiving capability of a portable terminal device on standby ...  
WO/2000/030214A1
A multiple loop antenna (70) is provided which may be connected to either a transmit circuit, a receive circuit, or a transmit/receive circuit (80). When powered by a transmit circuit (60), the antenna (70) generates radio frequency magn...  
WO/2000/028621A1
An electromagnetic wave is transmitted from and received by an antenna system (300) having a cavity member (310), a passive antenna element (320) and a driver element (330). The cavity member has a back portion (311) and a wall portion (...  
WO/2000/026990A1
A radiating element comprises a helical element (1), a diode (2) and a helical element (3). When the diode (2) is off, the helical elements (1, 3) are isolated from each other, so that only helical element (1) alone operates as a radiati...  
WO/2000/026991A1
A rotating field antenna is provided which includes a figure eight shape loop, a center loop magnetically coupled to the figure eight shape loop, and a drive element for driving the figure eight loop. The figure eight shape loop has an u...  
WO/2000/019562A1
An antenna feeding circuit needing no balanced-to-unbalanced transformer and having a simple structure. A microstrip line comprises a pair of strip conductors (5a, 5b) provided on the outer surface of a tube (1) and an internal conductor...  
WO/2000/019563A1
A compact, low cost antenna communicates with low and medium earth orbit satellites (104). The antenna (200) includes a plurality of micro-strip elements (204, 212) arranged about an axis and positioned to illuminate upper elevation angl...  
WO/2000/016439A2
The invention relates to an antenna which can be operated in several frequency bands. The inventive antenna has at least one part (1) that encloses an area and at least one part (2) that does not enclose an area. The at least two parts (...  
WO/2000/016441A1
A sectored antenna system has one or more dielectric lenses (20), each having a surface and two or more low profile antenna feed devices (21). At least one of the feed devices radiate signals into said lenses that emerge as separate dire...  
WO/2000/011750A1
A helical antenna having a radiator portion (110) formed on a flexible substrate (112) and a rigid substrate (120) with a center feed element (118) electrically connected to the radiator portion (110). The flexible substrate (112) is sup...  
WO/2000/011748A2
The present invention relates to problems with how to achieve a reliable and efficient connection between circuitry in a radio communication device and an extendable and retractable antenna device, which is operable in both extended and ...  
WO/2000/008713A1
A low profile antenna with high gain at low elevations suitable for satellite communications consists of a helical loop with turns tightly spaced to provide a strong coupling therebetween. The pitch is typically 1 to 2 degrees. The helic...  
WO/2000/008707A1
A communication terminal including a communication unit, a longitudinal antenna enclosed in a radome, and a pivot connecting the antenna to the unit for pivoting about an axis with an RF connection to the unit. The unit is in a box-shape...  
WO/2000/008712A1
The present invention relates to an antenna (1) for transmitting or receiving signals, comprising at least one first antenna element (2) for low frequencies and a second antenna element (3) for high frequencies. Both antennae are shaped ...  
WO1999063626A3
An antenna connector (10) for radio communication equipment is disclosed. The above connector (10) converts the conventional parallel resonance of an antenna into a series resonance by forming a flat cutout portion (11a) on its impedance...  
WO/2000/005781A1
An antenna device (1) for portable communication equipment and comprising an extendable elongated antenna element (2) which at its lower part comprises first and second contact surfaces and which is slidable inside a casing (5) between a...  
WO/2000/005780A1
The present invention pertains to the production of radio-electronic devices and more precisely to that of antenna-feeder devices. This invention may be used in portable (pocket) reception indicators for the GPS and GLONASS satellite rad...  
WO/2000/003454A1
Radiotelephones having retractable antenna systems are disclosed which include a helix antenna coupled to an extendible rod antenna. When the rod antenna is in the retracted position, the rod antenna is mostly, or completely, located wit...  
WO/2000/001029A1
An antenna unit for portable phones comprising: a first cylinder (4) erecting vertically from the upper part of a case (1) of a portable phone; a four-element dipole array antenna (4a-4d) connected to a transmitter/receiver circuit incor...  
WO/1999/067852A1
A tuneable antenna has at least a first and a second separate radiators (1, 2) coupled to each other. The coupling between the radiators (1, 2) can be modified by rotating and/or displacing the radiators (1, 2) with respect to each other...  
WO/1999/066591A1
A dielectric-loaded antenna having a plurality of radiating elements (10A, 10B) and a loop element (20) plated on the surface of a cylindrical ceramic core (12) has balanced and single-ended modes of resonance which are coupled together ...  
WO/1999/065106A1
A system and a method for slidable connection of a satellite antenna (202) to a mobile radio (100) comprising the satellite antenna including a satellite antenna element and at least one antenna contact (204) coupled thereto; and at leas...  
WO/1999/063626A2
An antenna connector (10) for radio communication equipment is disclosed. The above connector (10) converts the conventional parallel resonance of an antenna into a series resonance by forming a flat cutout portion (11a) on its impedance...  
WO/1999/060664A1
An antenna system including an antenna device and feed device for transmitting and receiving circularly polarised RF waves in a first mode of operation, and of linearly polarised RF waves in a second mode of operation, and a hand-held mo...  
WO/1999/060663A1
The object of the present invention is to achieve an easily mounted antenna device (104) for receiving and/or transmitting circular polarized RF signals in at least one and preferably two frequency bands with a well defined interface tow...  
WO/1999/060665A1
The object of the present invention is to achieve an antenna for both receiving and transmitting circularly polarized RF signals which is smaller and lighter than prior art antennas as well as to achieve one antenna for both receiving an...  
WO/1999/056343A1
A spiral antenna has a structure in which there may be a small gap (d1) between a feeder spring (117) and a fitting (112) connected with the proximal end (120) of the spiral antenna when a whip antenna (101) is pushed into the case (110)...  
WO/1999/053567A1
A micro-electromagnetic device having a three dimensional structure is formed using laser chemical vapor deposition on a conductive surface. Arrays of electromagnetic devices may be formed. Various techniques for facilitating deposition ...  
WO/1999/052179A1
A contrawound helical antenna (100, 130) produces a uniformly directed circulation of magnetic current (M) with a plurality of magnetic dipole elements (32, 34, 35). In one embodiment, the magnetic dipole elements (32, 34) have the same ...  
WO/1999/052178A1
An antenna is provided that receives electromagnetic radiation and includes a dielectric substrate (106). First and second spirals (60 and 70) on a first surface of the substrate (106) radiate the electromagnetic radiation. A third spira...  
WO/1999/048169A1
An antenna device used for a mobile communication unit such as a portable telephone operates satisfactorily on two or more frequency bands, can be adjusted to control its impedance characteristic, and can be manufactured with high yield....  
WO/1999/043042A1
A dual band antenna for a radio terminal consists of a retractable whip antenna (10) and a helical antenna (30) with irregular pitches, wherein the whip antenna (10) is independent of the helical antenna (30). The helical antenna (30) in...  
WO/1999/041803A1
A multifilar antenna (200) comprises n spaced antenna filaments, where n is an integer greater than 1; a matching circuit (210) for matching the characteristic impedance of the antenna to that of a transmitting and/or receiving apparatus...  
WO/1999/039403A1
An antenna device for a radio communications apparatus operates in at least two frequency bands. The antenna device has a helical antenna element (11) for the one frequency band and a rod-shaped antenna element (12) for the other frequen...  
WO/1999/039402A1
Radio equipment with an antenna, wherein the antenna can be inserted into and pulled out from a housing of said radio equipment. According to the invention, the antenna is embodied as a radiator in the shape of a helix having different i...  
WO/1999/035708A1
An antenna device (A3) for a portable telephone unit, which comprises a whip antenna (1) having an enlarged portion (52) molded near its top. A plastic guide ring (7) is fit on the whip antenna (1) in such a manner that it abuts against ...  
WO/1999/034481A1
An antenna system for a radio communication device, in particular a hand-portable telephone, having communication circuits and to be operating by circularly-polarized radio waves. In the system (1) there is provided a radiation means, pr...  
WO/1999/034476A1
Radiotelephones having retractable antenna systems are disclosed which include a housing, a transceiver disposed within the housing, a user interface which is electrically coupled to the transceiver, a non-radiating feed movably mounted ...  
WO/1999/033147A1
A broadband antenna having closely spaced dipole antenna elements (1-8) to form a log-periodic array, arranged normal to a signal feed network having a separate feed line (21-28) for each of the dipole elements. The length of each feed l...  
WO/1999/033146A1
A mechanically simple dual-frequency (or wide band) quadrifilar helix antenna (1). It includes four helix shaped radiating elements (2-5) where each helix element consists of two or more parallel helices (2a, 2b, 3a, 3b, 4a, 4b, 5a, 5b) ...  
WO1999017395A3
A quadrifilar antenna for use in satellite communications comprises four conductive elements arranged to define two separate helical pairs, one slightly differing in electrical length than the other, defined by a cylinder of constant rad...  
WO1999017398A3
Radiotelephone antennas include rigid antenna elements integral to the antenna substrate or housing. As such, the present invention configures the antenna without requiring a separate flex circuit winding to provide the conductive windin...  
WO/1999/030384A1
An antenna system for an electronic article surveillance system, comprising: a first, tunable transmitting loop (12); a second, tunable transmitting loop (14), the first and second transmitting loops being arranged for first and second m...  
WO/1999/028989A1
A combination antenna device wherein a helical antenna which is constituted of a helical element and supplies power to a coaxial line and a monopole antenna which is constituted of an outer conductor of the coaxial line are formed coaxia...  
WO/1999/026311A1
A feed circuit connects an antenna to a communications circuit to achieve an increased operating bandwidth. The feed circuit includes a folded balun having a balanced port configured to connect the antenna and an unbalanced port configur...  
WO/1999/026316A1
Antenna systems for transmitting electrical signals are provided which include a quadrifilar helix antenna. A first antenna feed is coupled to the quadrifilar helix antenna for exciting the radiating elements in phase quadrature. A secon...  
WO/1999/022421A1
A plurality of silicon and GaAs wafers (32) each including integrated circuitry for providing particular functions for each wafer are mounted within a housing (19) in a stacked, spaced apart, and parallel configuration. Photodetectors an...  

Matches 551 - 600 out of 2,794