Electronic phase reflector with enhanced phase shift...

Details Electronic phase reflector with enhanced phase shift... Electronic phase reflector with enhanced phase shift...

2007-04-17

2007-04-17

Pascal, Robert (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

C333S033000, C333S035000

Reexamination Certificate

active

11169173

ABSTRACT:
A varactor based phase shifter that increases phase shift range using an impedance transformer to impart a low characteristic impedance between an input port and a reference node port. The characteristic impedance across the port is therefore less than the characteristic impedance would be otherwise, and the phase shift range is increased. In one embodiment, a simple reflection phase modifier can be used in a phased array using space feed parasitic antenna elements. This type of analog varactor reflection phase modifier can provide fine phase resolution, and the array can thus be used for low-loss adaptive beam forming.

REFERENCES:
patent: 4450419 (1984-05-01), Schwarzmann

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