FM-CW radar transceiver

Details FM-CW radar transceiver FM-CW radar transceiver

1995-07-07

1997-01-21

Sotomayor, John B.

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

Presence detection only

By motion detection

342114, 342175, 342198, G01S 1358, G01S 1362

Patent

active

055963250

ABSTRACT:
An FM-CW radar transceiver comprising an oscillator connected to an input of a power divider having first and second terminal outputs. The first terminal output of the power divider is connected to an input of a first diode and a first shorted stub. The second terminal output of the power divider is connected to an input of a phase shifter with the output of the phase shifter connected to an input of a second diode and a second shorted stub. The outputs of the first and second diodes are each connected to inputs of first and second intermediate frequency (IF) filters and then through first and second IF blocking structures terminating at a common antenna port. An open stub is connected to the common antenna port with the outputs of the first and second IF filters each connected to an IF port or channel. In use, the FM-CW transceiver operates as a frequency multiplier for transmitting, and simultaneously as a subharmonically pumped "I/Q" mixer for reception.

REFERENCES:
patent: 4176351 (1979-11-01), DeVita et al.
patent: 4241347 (1980-12-01), Albanese et al.
patent: 5134411 (1992-07-01), Adler
patent: 5181037 (1993-01-01), Komatsu
patent: 5229774 (1993-07-01), Komatsu
patent: 5268692 (1993-12-01), Grosch et al.
patent: 5359331 (1994-10-01), Adler

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