Phase shifter start/stop electronic trimming

Details Phase shifter start/stop electronic trimming Phase shifter start/stop electronic trimming

1981-05-26

1983-09-20

Lieberman, Eli

Communications: radio wave antennas

Antennas

With coupling network or impedance in the leadin

307412, 333 241, H01Q 338

Patent

active

044059272

ABSTRACT:
The phase shifter start/stop electronic trimming circuit provides a means r electronically trimming phase shifters when stop/start two axis steering is used. A time delay is incorporated into the start logic line of each phase shifter driver allowing the particular insertion phase characteristic of the microwave portion of the phase shifter to be accounted for. Variations of 360 degrees of insertion phase can be trimmed by this method. Delaying the start pulse into the logic device makes the phase setting less than that required of a perfect phase shifter, thereby correcting all units whose insertion phase is longer than the perfect unit. Consequently, the nominal insertion phase of a perfect unit will normally be the shortest phase length encountered. Where a shorter than nominal insertion phase is involved, the insertion phase difference may be subtracted from 360.degree. and using the value.

REFERENCES:
patent: 4042831 (1977-08-01), Lenhoff

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