Accession Number : AD0688511

Title :   NEW HIGH-POWER ELECTRONIC TUNING CAPABILITIES BY EXPLOITATION OF TENSOR RELATIONSHIP OF ABSORPTION AND DISPERSION IN FERRITES.

Descriptive Note : Research and development technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Gikow,Emanuel

Report Date : APR 1969

Pagination or Media Count : 23

Abstract : A technique is described for high speed electronic tuning of an inductive device capable of handling VHF powers in excess of 100 watts CW. Electronic tuning is accomplished by means of a controlled dc bias applied to an inductor with a ferrite core. As opposed to conventional magnetic bias tuning the ferrite core is operated above saturation. In this mode it is seen the ferrite cores can be operated with high r.f. fields with no detectable degradation of Q and negligible distortion products. Specific examples are presented of the application of this new capability in medium power amplifiers operating over the frequency range of 70 to 300 MHz. (Author)

Descriptors :   (*TUNING DEVICES, MAGNETIC CORES), COILS, FERRITES, RADIOFREQUENCY POWER, POWER AMPLIFIERS, VERY HIGH FREQUENCY

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE