Injection switch and directional coupler

Details Injection switch and directional coupler Injection switch and directional coupler

1986-07-15

1987-10-20

Gensler, Paul

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333104, 333109, H01P 115

Patent

active

047017244

ABSTRACT:
An R.F. switch includes a directional coupler with a main line and a quarter wavelength coupled arm. One end of the main line is connected to a first input port and the other end is connected to a first output port. The coupled arm is selectibly terminated at one end in either its characteristic impedance or a short. A PIN diode controls the termination. The second end of the coupled arm is connected to a second input port. A PIN diode switch is connected between the second end of the coupled arm and a second output port. In a first position, signals present at the input ports are combined and appear at the first output port. The directional coupler provides isolation such that the signal at the second input port is not coupled to the first input port. In the second position, the signal at the second input port is disconnected from the first output port and only connected to the second output port.

REFERENCES:
patent: 4001821 (1977-01-01), Nelson

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