Patents
Patents for H01Q 7 - Loop aerials with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop (7,833)
10/1990
10/16/1990US4963880 Coplanar single-coil dual function transmit and receive antenna for proximate surveillance system
09/1990
09/12/1990EP0386134A1 Antenna system for magnetic and resonant circuit detection.
09/05/1990CN2061735U Multiring long distance high gain tv receiving aerial with compensating feeder
08/1990
08/16/1990EP0382130A2 Small radio-controlled clock with an antenna coil
08/07/1990US4947180 FM antenna
07/1990
07/26/1990WO1990008404A1 Reactance buffered loop antenna and method for making the same
07/24/1990US4943810 Antenna coil with integral housing
07/18/1990CN1008859B Directional active antenna of full frequency channels
07/12/1990WO1990007803A1 Antenna structure for an electronic article surveillance system
07/10/1990US4940992 Balanced low profile hybrid antenna
07/04/1990EP0376062A1 Electronic module with an integrated circuit for a portable object of small dimensions, such as a card or a key, and process for manufacturing such a module
06/1990
06/30/1990CA2006749A1 Antenna structure for an electronic article surveillance system
06/13/1990CN2058276U Vehicle-borne short-wave double ring transmitting antenna
06/06/1990EP0371562A1 Coil antenna device
06/06/1990CN2058038U Supper-thin type soft tv antenna
05/1990
05/17/1990DE3903115C1 Arrangement for simulating the consequences of an electrostatic discharge
05/16/1990CN1042114A Antenna for apparatus for surveillance of pneumatic tyre
05/15/1990CA1269134A1 Near field probe
05/14/1990EP0274526A4 Transponder device.
05/08/1990US4924237 Antenna and its electronic circuit combination
05/03/1990DE3837148A1 Omnidirectional antenna arrangement for time signal receivers
05/02/1990EP0365939A1 Antenna for a tyre surveillance device
03/1990
03/29/1990DE3832813A1 Magnetic transmitting and/or receiving antenna
03/28/1990EP0360594A2 Automobile loop antenna
01/1990
01/31/1990EP0352513A2 Load isolated article surveillance system and antenna assembly
01/18/1990DE3823972A1 Magnetic radiating element having a coil made of bifilar turns
01/16/1990US4894663 Ultra thin radio housing with integral antenna
01/10/1990EP0350006A2 Antenna structure used in portable radio device
12/1989
12/28/1989WO1989012916A1 Antenna system for magnetic and resonant circuit detection
12/26/1989US4890115 Magnetic antenna
11/1989
11/08/1989CN1037054A Balanced low profile hybrid antenna
11/07/1989US4879570 Broadcasting wave reception antenna
10/1989
10/31/1989US4878059 Farfield/nearfield transmission/reception antenna
10/31/1989CA1262570A1 Vehicle antenna system
10/19/1989WO1989010012A1 Balanced low profile hybrid antenna
10/18/1989EP0337656A2 High efficiency antenna
10/10/1989US4873527 Antenna system for a wrist carried paging receiver
10/03/1989US4872018 Multiple loop antenna
10/03/1989US4870779 Magnetic rodent control method
09/1989
09/27/1989EP0334297A2 Wrist carried wireless instrument
09/12/1989US4866455 Antenna system for magnetic and resonant circuit detection
08/1989
08/29/1989US4862181 Miniature integral antenna-radio apparatus
08/15/1989US4857893 Single chip transponder device
08/10/1989WO1989007347A1 Magnetic field concentrator
08/10/1989DE3802474A1 Arrangement for producing a homogeneous, frequency-independent alternating magnetic field
07/1989
07/18/1989US4849767 Helical antenna for small portable wireless devices
07/11/1989US4847626 Dielectrical material
07/04/1989US4845509 Multiple loop receiving device in a security system
07/04/1989CA1256989A1 Automobile antenna
07/04/1989CA1256988A1 Automobile antenna
06/1989
06/15/1989WO1989005530A1 Antenna structure for providing a uniform field
06/13/1989US4839661 Guided wave antenna system and method
05/1989
05/09/1989US4829310 Wireless communication system using current formed underground vertical plane polarized antennas
05/09/1989CA1253960A1 Miniature gain antenna
04/1989
04/26/1989CN2036706U Train-borne omnidirectional wide-band tv receiving antenna
04/18/1989US4823141 Vehicle antenna system
04/18/1989CA1252881A1 Automobile antenna system with a high-frequency pick-up coil
04/12/1989CN1032410A Directional active antenna of full frequency channels
04/04/1989US4817612 Cross-coupled double loop receiver coil for NMR imaging of cardiac and thoraco-abdominal regions of the human body
03/1989
03/28/1989US4816837 Automobile antenna system
03/21/1989US4814782 Single turn ferrite rod antenna and method
03/21/1989US4814776 Optimally grounded small loop antenna
03/14/1989US4812812 Apparatus and method for determining the position and orientation of a remote object
03/07/1989US4811024 Automobile antenna
02/1989
02/28/1989US4809010 Low profile wireless communication system and method
02/22/1989CN2033156U Hanging full frequency channel antenna for tv
02/14/1989US4805232 For adorning the waist of pants
02/14/1989US4804968 Vehicle antenna system
01/1989
01/31/1989US4801944 Antenna
01/24/1989US4799310 Method for manufacturing a bar antenna
01/10/1989CA1248606A1 Transponder systems
01/05/1989DE3820248A1 Keyless actuating system for a vehicle-locking device
12/1988
12/28/1988CN88211467U Monodirectional tv antenna adjustable in three-dimension
12/27/1988US4794397 Automobile antenna
11/1988
11/22/1988CA1245351A1 Automobile antenna system
11/03/1988WO1988008622A1 Single-turn loop resonator
10/1988
10/12/1988CN87216868U Miniature high-fidelity all-channel indoor antenna
10/05/1988EP0285303A1 Broadcasting wave reception antenna
08/1988
08/24/1988CN87212544U Miniature shared antenna system
07/1988
07/20/1988EP0274526A1 Transponder device.
07/19/1988CA1239471A1 Automobile antenna system
07/05/1988US4755827 Millimeter wavelength monolithic ferrite circulator/antenna device
07/05/1988US4755345 Impedance matched, high-power, rf antenna for ion cyclotron resonance heating of a plasma
06/1988
06/28/1988US4754284 Automobile antenna system
06/14/1988US4751516 Antenna system for magnetic and resonant circuit detection
06/14/1988US4751515 Electromagnetic structure and method
06/01/1988CN87203947U Wall-hanging type television antenna
05/1988
05/24/1988US4746927 VOR antenna design
04/1988
04/13/1988CN87204935U Coil antenna of variable impendance
03/1988
03/16/1988CN87208874U Domestic audio transmitting loop antenna
02/1988
02/10/1988CN86202866U Sound-reducing wave-transmitter and accessory wave-receiver
02/09/1988US4724427 Transponder device
01/1988
01/28/1988WO1988000785A1 Transponder device
01/27/1988EP0254415A1 Antenna system
01/05/1988US4717921 Automobile antenna system
01/05/1988US4717920 Automobile antenna system
12/1987
12/29/1987CA1230922A1 Nuclear magnetic resonance radio frequency antenna
12/08/1987US4712112 Miniature antenna with separate sequentially wound windings
11/1987
11/10/1987CA1229141A1 Method and apparatus for detection of targets in an interrogation zone
10/1987
10/20/1987US4701764 Miniature high-gain antenna
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