Communications: radio wave antennas – Antennas – Wave guide type
Patent
1996-07-10
1998-08-18
Hajec, Donald T.
Communications: radio wave antennas
Antennas
Wave guide type
343772, 333 21A, 333 21R, H01Q 1300
Patent
active
057963711
ABSTRACT:
An outdoor satellite broadcast receiving converter including a waveguide into which a broadcast electric wave enters and in which the broadcast electric wave travels in an axial direction as a first linearly polarized wave and a second linearly polarized wave. A first probe is disposed at a predetermined position and extends perpendicular to the axial direction into the waveguide for detecting the first linearly polarized wave. A substrate is disposed in the waveguide approximately 1/4 wavelength from the first probe and arranged to extend across an open end of the waveguide. A first shorting terminal for reflecting the first linearly polarized wave is formed on a first side of the substrate, and a second probe for detecting the second linearly polarized wave is formed on an opposing second side of the substrate. A metallic case is connected over the open end of the waveguide such that the substrate is positioned between a closed bottom of the metallic case and the first probe. The closed bottom of the metallic case is disposed about 1/4 wavelength from the substrate, and includes a second shorting terminal for reflecting the second linearly polarized wave.
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Saito Shuji
Sato Makoto
Shigihara Makoto
Suzuki Shigetaka
Alps Electric Co. ,Ltd.
Hajec Donald T.
Ho Tan
Shoup Guy W.
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