Radar transponder

Details Radar transponder Radar transponder

1995-09-20

1998-03-03

Blum, Theodore M.

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

Directive

Including a satellite

3644497, 343882, H04B 7185, G01S 502

Patent

active

057240450

ABSTRACT:
A multi-functional radar transponder functions as SART in an emergency condition and as monitor, GPS receiver and VHF transceiver for non-emergency conditions. The radar transponder has an antenna including a SART antenna, a GPS antenna and a Marine VHF antenna. The radar transponder further includes a SART circuit with a monitor output device for monitoring a radar signal, and transfer switches for transferring a monitor process in a normal mode to a responding process in an emergency mode, and vice versa. The GPS antenna closes to a position parallel to the SART antenna in the normal mode and opens vertically against the SART antenna in the emergency mode. The Marine VHF antenna locks the GPS antenna together with the SART antenna for preventing a false emergency response in the normal mode and unlocks the SART antenna for an emergency response in the emergency mode.

REFERENCES:
patent: 4129868 (1978-12-01), Tahara et al.
patent: 4885588 (1989-12-01), Kawakami
patent: 4980689 (1990-12-01), Kawakami
patent: 5177493 (1993-01-01), Kawamura
patent: 5523761 (1996-06-01), Gildea
W. Goebel, "Seenotruf nutzt Superpositionsprinzip", Satellitenfunk, In. Ntz, 1991 Ed. 44, No. 5, pp. 332-336.

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