Microwave amplifier with bypass segment

Details Microwave amplifier with bypass segment Microwave amplifier with bypass segment

2005-03-08

2005-03-08

Choe, Henry (Department: 2817)

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

C330S12400D

Reexamination Certificate

active

06864743

ABSTRACT:
A microwave amplifier device with a bypass segment, the device operating either in active mode or in bypass mode. The bypass segment (2) comprises at least one section (13) of coupled transmission lines (14,15) whereby the isolation is increased. The amplifier unit (1) includes two LNAs arranged in parallel in a balanced configuration, and the bypass segment (2) has a relatively high input impedance in active mode, whereby a balanced operation of the amplifier unit is maintained. Consequently, a low noise factor is obtained, as well as reduced input and output reflections.

REFERENCES:
patent: 3992669 (1976-11-01), Dades
patent: 4056785 (1977-11-01), Swan
patent: 4825177 (1989-04-01), Teague et al.
patent: 5418490 (1995-05-01), Kaegebein
patent: 5821811 (1998-10-01), Persson
patent: 6060949 (2000-05-01), Kaufman et al.
patent: 6069526 (2000-05-01), Ballantyne
patent: 6362685 (2002-03-01), Vagher

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