Stepped frequency radar

Communications: directive radio wave systems and devices (e.g. – Determining distance – Combined with determining direction

Reexamination Certificate

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Details

C342S175000, C342S196000

Reexamination Certificate

active

07570200

ABSTRACT:
In the invention, a four-port junction (10) has a port (12) connected to an RF signal source (14). The four-port junction (10) also has an antenna port (16) coupled to a combined transmit/receive antenna (18). Two ports (20, 22) of the four-port junction (10) develop output power that is applied to an analogue-to-digital converter (24), that is in turn coupled to a central processor (26), that is in turn coupled to a user interface (28).

REFERENCES:
patent: 3378844 (1968-04-01), Zurcher
patent: 4492960 (1985-01-01), Hislop
patent: 4725842 (1988-02-01), Mayberry
patent: 4857935 (1989-08-01), Bates
patent: 5153596 (1992-10-01), Stove
patent: 5587713 (1996-12-01), Pfizenmaier et al.
patent: 5610611 (1997-03-01), McEwan
patent: 5910785 (1999-06-01), Normant
patent: 5952955 (1999-09-01), Kennedy et al.
patent: 6072419 (2000-06-01), Normant
patent: 6195035 (2001-02-01), Wood

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