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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...
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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...
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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...
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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)...
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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 ...
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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 ...
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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...
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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....
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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...
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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...
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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...
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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...
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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 ...
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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...
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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 ...
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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...
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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) ...
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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...
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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...
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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...
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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...
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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...
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WO/1999/022419A1 |
A multiple band antenna assembly for a portable hand held communication device. The antenna assembly includes a fixed multiple band base antenna element and a whip antenna which can be adjusted between extended and retracted position. Th...
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WO/1999/017395A2 |
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...
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WO/1999/017398A2 |
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...
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WO/1999/014819A1 |
Antenna systems for transmitting and receiving electrical signals in two widely separated frequency bands are provided which comprise a helix antenna and a parasitic element which is adjacent to the helix antenna. The parasitic element i...
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WO/1999/009609A1 |
A contrawound helical winding is manufactured by forming first (30) and second (40) conductors in respective first and second cyclic patterns of opposite spatial phase relative to one another and which cross one another at a plurality of...
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WO/1999/009608A1 |
An electromagnetic antenna (10) comprises a continuous conductor (12) comprising a first length portion (14) and a second length portion (16), the first and second length portions each having a first end and a second end whereby the firs...
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WO/1999/009536A1 |
A highly efficient resonant switching driver circuit (10) includes a matching reactance (16) coupled between a resonant antenna (12) and a driver circuit (14). The matching reactance performs a series to parallel impedance match from the...
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WO/1999/007032A1 |
A process for manufacturing a helix antenna in a simple manner is characterised by the following steps: 1. an injection-moulded preform (1) made of a metallisable plastic material and consisting essentially of a cylindrical core (4) join...
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WO/1999/003169A1 |
A retractable antenna (10) for use with a communications device such as a cellular telephone is described and which may be moved from a fully extended position to a fully retracted position with respect to the telephone housing. The tele...
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WO/1999/001908A1 |
A helical antenna having stubs spaced along the helix curve length and extending toward the central axis of the helix, such that the performance characteristics of the antenna, such as gain and circular polarization, are maintained while...
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WO/1998/056072A1 |
A method for producing an antenna (10), by introducing a moldable material into a mold and molding the material in the mold into an antenna having a desired shape, preferably a helical shape (12). The method is used to produce an antenna...
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WO/1998/053524A1 |
A multiple frequency band, multi-spiral antenna (50) that employs filters (88, 90) to pass the band of one spiral (60) and reject the band of the other spirals (70). Additional isolation is achieved by arranging adjacent spirals to have ...
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WO/1998/053523A1 |
A radiotelephone matching switching system and associated antenna and printed circuit board contact configurations for a retractable antenna employ at least two contacts which are traversely spaced apart in the radiotelephone housing so ...
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WO/1998/050982A2 |
A method and an apparatus are described which will allow an Integrated Services Digital Network (ISDN) subscriber to establish a permanent or semi-permanent connection to a data network using the D channel as a low-speed, low-cost connec...
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WO/1998/049749A1 |
A hybrid logarithmic yagi antenna system (10) characterized by the absence of a balum or other conventional log periodic yagi antenna system balanced feed and impedance matching means. The reflector (12) is configured as a supporting con...
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WO/1998/049740A1 |
Radiotelephones configured with integrated matching circuit components in the housing and antenna are disclosed. The present invention configures the antenna and the associated housing receiving passage to define a capacitor and inductor...
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WO/1998/044589A2 |
A dual-band helical antenna provides operation in two frequency bands. The dual-band helical antenna includes two single-band antennas (1304, 1308), each having a feed network (1804, 1808), a ground plane (412) opposite the feed network,...
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WO/1998/044590A1 |
An area-efficient network is configured such that a section of the feed network (1804, 1808) is disposed on a radiator portion of an antenna (1304, 1308) and the remainder of the feed network is disposed on a feed portion. Because part o...
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WO/1998/043313A1 |
A communication antenna (10) having a driven element (16) extending between a feed point (13) and an attachment point (15) to a top loaded element in which the driven element (16) is longer than the shortest distance (P) between the feed...
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WO/1998/042042A1 |
The invention concerns an antenna for re-transmitting to the ground images produced by an orbiting satellite imaging instruments, characterised in that it comprises a plurality of elementary radiating antennae (1) with a plurality of cor...
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WO/1998/040930A1 |
An RFID circuit for incorporation in an identification device which includes a polymeric substrate (12), the circuit being formed or integrally connected with said substrate whereby the substrate becomes a component of the RFID circuit. ...
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WO/1998/039816A1 |
An antenna element for circular polarization is described. It comprises a ground plane (1), with first to fourth radiation members (2-5) in the form of helical wires, symmetrically arranged around a symmetry axis (6), as well as a distri...
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WO/1998/036469A1 |
The present invention presents an antenna device for an automotive vehicle comprising first coil installed horizontally to receive radio signals, capacitors connected with the first coil in electrical parallel, second coil connected elec...
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WO/1998/033231A1 |
An improved antenna for a radio transmitter and receiver which is capable of more efficiently transmitting and receiving radios by providing the same in a radio transmitter and receiver such as a Personal Communication Service (PCS) syst...
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WO/1998/031069A1 |
A helical antenna element including a metallic coil, a dielectric support element inserted in the coil, the support element being formed with a generally hollow core, and a dielectric tuning element inserted into said core, the tuning el...
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WO/1998/031067A1 |
A dual band antenna for a mobile communication system which includes: a metal tube having an open end; a coaxial feed line having inner and outer conductors, with one portion of the coaxial line inserted into the metal tube, a ground pla...
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WO/1998/030038A2 |
A multi-piece retractable radiotelephone antenna and associated communication method is employed to provide improved signal quality. The multi-piece antenna includes conductive windings, such as helical quadrafillar windings, disposed se...
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WO/1998/028817A1 |
A quadrifilar helix antenna system capable of providing a positive gain, quasi-hemispherical antenna pattern over widely separate transmit and receive frequency bands. This new antenna system comprises concentrically arranged, but electr...
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