Transceivers

Details Transceivers Transceivers

1997-11-21

1999-07-20

Pihulic, Daniel T.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For frequency modulation

G01S 1300, H01P 308

Patent

active

059261293

ABSTRACT:
A combined duplexer/mixer (2) for use with FMCW radar systems has a waveguide section (12,13) containing a fin-line structure (17,18) for responding to the linearly polarized radar return signal while permitting passage of the orthogonally polarized transmitted signal (T). A portion of the transmitted signal is extracted by a patch antenna (22), this extracted signal forming a local oscillator signal for mixing with the return.

REFERENCES:
patent: 4122449 (1978-10-01), Endo
patent: 4731611 (1988-03-01), Muller et al.
patent: 4777654 (1988-10-01), Conti
patent: 4991228 (1991-02-01), Ohta et al.
patent: 5315303 (1994-05-01), Tsou et al.

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