Accession Number : ADD008707

Title :   Phase Shifter Start/Stop Electronic Trimming.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Loomis,Jester M , III

Report Date : 26 May 1981

Pagination or Media Count : 15

Abstract : The phase shifter start/stop electronic trimming circuit provides a means for 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 degrees and using the value. (Author)

Descriptors :   *Patent applications, *Phase shift circuits, *Timing circuits, Logic circuits, Microwaves, Pulses, Beam forming, Phased arrays, Antenna arrays, Injection diodes, Axes, Delay, Waveforms

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE