Communications: radio wave antennas – Antennas – Wave guide type
Patent
1990-02-20
1992-04-28
Laroche, Eugene R.
Communications: radio wave antennas
Antennas
Wave guide type
343786, 333126, 333135, 333 21R, H01Q 1302, H01Q 1324, H01P 116, H01P 1213
Patent
active
051092328
ABSTRACT:
A dual band feed arrangement for a microwave antenna provides microwave communication in a lower band and in a substantially widened upper band to provide simultaneous microwave communication for three signals. One signal in the lower band propagates between the outer and inner conductors of a coaxial waveguide in the TE.sub.11 coaxial mode, and two signals in the upper band propagate in the inner conductor in TE.sub.11 circular waveguide mode. A combiner, having a conically shaped section with a plurality of irises through its sidewall, is coupled to the coaxial waveguide to provide a transformation from the TE.sub.11 modes to the HE.sub.11 waveguide modes for each of the three signals. A dielectric rod extends from within the inner conductor and into the horn antenna for propagating the second signal out of and into the antenna.
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Andrew Corporation
LaRoche Eugene R.
Lee Benny T.
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