Accession Number:

ADD013387

Title:

Electromagnet for Programmable Microwave Circulator.

Descriptive Note:

Patent, Filed 1 Jun 84, patented 21 Jul 87,

Corporate Author:

DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Report Date:

1987-07-21

Pagination or Media Count:

12.0

Abstract:

A Spacercore design is used to provide the cores of the electromagnets which are used to bias ferrite slabs in phase shifters of a high power RF attenuator. The phase shifters require a given flux to provide a phase shift from zero to 90 deg. With laminations of high permeability silicon steel, the core weight may be substantially reduced by including a filler comprising spacers of nonmagnetic material such as lightweight transformer pressboard. With 14-mil silicon steel laminations and 64-mil spacers, this construction provides a core which weighs 25 percent of a full ferrite core for the same flux density.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE