Low power linear transmit/receive (T/R) module

Details Low power linear transmit/receive (T/R) module Low power linear transmit/receive (T/R) module

2006-02-24

2010-11-09

Tran, Tuan A (Department: 2618)

Telecommunications

Transmitter and receiver at same station

With transmitter-receiver switching or interaction prevention

C455S078000, C455S079000, C455S083000, C455S084000

Reexamination Certificate

active

07831214

ABSTRACT:
A T/R module utilizes a low noise amplifier in both the transmit and receive modes. In this manner the low noise amplifier enables one to provide a T/R module which has reduced prime power and lower weight and particularly useful in airship radar systems and spaced based radar systems. The low noise amplifier is switched between a receive and a transmit mode by switching mechanism which in the receive mode enables the antenna to be directed to the input of the low noise amplifier with the output of the low noise amplifier directed to a phase shifter and attenuator. The switching operates in a transmit mode where the output of the low noise amplifier is connected to the input of the antenna while the input of the low noise amplifier is now connected to the phase shifter and attenuator for providing a transmit signal. The invention has an additional benefit of enabling linear Class A operation in the transmit mode in both radar and communication systems supporting beam shaping and waveform shaping capabilities. A 100% transmit duty cycle for communications is also supported.

REFERENCES:
patent: 5027084 (1991-06-01), Tsukii
patent: 5590412 (1996-12-01), Sawai et al.
patent: 5903820 (1999-05-01), Hagstrom
patent: 6236840 (2001-05-01), Aihara et al.
patent: 6400963 (2002-06-01), Glockler et al.
patent: 6957047 (2005-10-01), Young et al.
patent: 7212788 (2007-05-01), Weber et al.

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