Microwave circulator comprising a plurality of directional coupl

Details Microwave circulator comprising a plurality of directional coupl Microwave circulator comprising a plurality of directional coupl

1985-12-20

1987-07-07

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333 11, 330277, H03H 752, H03H 1102

Patent

active

046790101

ABSTRACT:
A gallium arsenide isolator has a common gate FET for amplifying a microw signal, the common gate FET being connected to a common drain FET for transmitting the microwave signal and for isolating the common gate FET from signals travelling in a direction opposite to the microwave signal. One or more L-C networks are connected at one end between the input and output of the isolator and at the other end to ground. The circulator includes three arms each having a gallium arsenide isolator. Each of the arms is coupled to another one of the arms by means of a four port coupler which permits transmission of a signal from one port to a second diagonally opposite port, the third port receiving a fixed fraction of the power and the fourth port receiving effectively no power.

REFERENCES:
patent: 3017577 (1962-01-01), Kostelnick
patent: 3423688 (1969-01-01), Seidel
patent: 3860893 (1975-01-01), Ropars et al.
patent: 4390851 (1983-06-01), Higgins et al.
patent: 4525678 (1985-06-01), Lehmann et al.

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