Clockwise and counterclockwise circularly polarized wave common

Details Clockwise and counterclockwise circularly polarized wave common Clockwise and counterclockwise circularly polarized wave common

1993-12-30

1995-11-28

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455 32, 455327, 333 21A, 343700MS, H04B 126, H04H 100, H01P 116, H01P 126

Patent

active

054716640

ABSTRACT:
The input probe of an LNB for commonly receiving clockwise and counterclockwise circularly polarized waves includes a rectangular microstrip patch, with the length of one edge of it being .lambda..sub.g /4, which is installed at the center of an annular strip shaped ground pattern, with a feed horn being disposed at the side opposite to a substrate. Four input probes are installed adjacently to the respective edges of the rectangular microstrip patch. The two pair of the input probes which are installed adjacently to the respective edges of the rectangular microstrip patch are respectively commonly connected to first and second feed lines. With this arrangement, the length of one input probe relative to that of the other one shows a difference of .lambda..sub.g /4.

REFERENCES:
patent: 4951010 (1990-08-01), Grim
patent: 5214527 (1993-05-01), Chang et al.
patent: 5276410 (1994-01-01), Fukuzawa et al.
patent: 5303403 (1994-04-01), Leong
patent: 5359336 (1994-10-01), Yoshida
patent: 5384557 (1995-01-01), Yoshida et al.
patent: 5410322 (1995-04-01), Sonoda

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