Accession Number:

ADA063928

Title:

I/J Band Low-Cost Crossed-Field Amplifier.

Descriptive Note:

Interim technical rept. 28 Sep 77-8 May 78,

Corporate Author:

NORTHROP CORP DES PLAINES IL DEFENSE SYSTEMS DIV

Personal Author(s):

Report Date:

1978-12-01

Pagination or Media Count:

29.0

Abstract:

This program is directed toward development of an IJ band, linear format, injected-beam crossed-field amplifier IBCFA for electronic warfare. The IBCFA should be capable of power output of 1000 W peak, 200 W average, between 8.5 and 17 GHz with 20 dB gain. A laser-cut shaped-substrate meander line is used. Performance in an EF band IBCFA is evaluated, for which the objective performance in the 2-4 GHz band is 3.0 kW peak power output, 1.0 kW average power output, also with 20 dB gain. In addition, a gun for IJ band is to be designed and evaluated. For EF band, a cold-test model was built using the same technology as contemplated for operating tubes. Values of delay ratio, coupling impedance, and attenuation were substantially as expected. An EF-band operating CFA using the shaped-substrate meander line, and other parts common with a standard EF-band CFA design, was built and tested. Performance was comparable with a typical CFA of standard design, slightly lower in efficiency at mid band and approximately the same over the remaining part of the 2-4 GHz band. An IJ-band cold-test model was built, and measurements of delay ratio, coupling impedance, and attenuation were made. Results showed that a reduction of pitch and a thinner substrate are necessary for an efficient IJ band tube.

Subject Categories:

  • Electrical and Electronic Equipment
  • Countermeasures

Distribution Statement:

APPROVED FOR PUBLIC RELEASE