Patents for H01Q 21 - Aerial arrays or systems (25,127) |
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08/24/1976 | US3977006 Compensated traveling wave slotted waveguide feed for cophasal arrays |
08/17/1976 | US3975737 Radome-antenna structure |
08/03/1976 | US3973263 Sensitivity improvement of spaced-loop antenna by capacitive gap loading |
07/27/1976 | US3971125 Method of making an antenna array using printed circuit techniques |
07/20/1976 | US3971032 Dual frequency microstrip antenna structure |
07/20/1976 | US3971027 Radio interferometer sector-definition |
07/13/1976 | US3969730 Cross slot omnidirectional antenna |
06/15/1976 | US3964069 Constant beamwidth antenna |
06/15/1976 | US3964067 Glide path signal transmission system |
06/15/1976 | US3964065 Steerable antenna null combiner system |
05/18/1976 | US3958247 Rf power coupling network employing a parallel plate transmission line |
05/11/1976 | US3956752 Polarization insensitive lens formed of spiral radiators |
04/20/1976 | US3952310 Crossed dipole and slot antenna in pyramid form |
04/13/1976 | US3950204 Aluminum waveguide antenna, adhesives, curing, microwaves |
04/06/1976 | US3949405 Vertically polarised omnidirectional antenna |
03/30/1976 | US3947770 Broadband omnidirectional RF field intensity indicating device |
03/09/1976 | US3943522 Circularly polarized antenna system using a combination of turnstile and vertical dipole radiators |
03/09/1976 | US3943517 Adaptive polarization receiving system |
02/24/1976 | US3940770 Cylindrical array antenna with radial line power divider |
02/17/1976 | US3939477 Quadrupole adcock direction finder and antenna therefor |
02/10/1976 | US3938161 Microstrip antenna structure |
02/10/1976 | US3938158 Antenna element for circular or linear polarization |
02/10/1976 | US3938044 Antenna apparatus for an electronic security system |
02/03/1976 | US3936836 Z slot antenna |
01/13/1976 | US3932874 Broadband turnstile antenna |
01/13/1976 | US3932762 Apparatus for measuring radiation angle dependence |
01/06/1976 | US3931625 Shortened multi-rod broadband antenna |