I/J Band Low-Cost Crossed-Field Amplifier.
Abstract
This program is directed toward development of an I/J 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 E/F 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 I/J band is to be designed and evaluated. For E/F 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 E/F-band operating CFA using the shaped-substrate meander line, and other parts common with a standard E/F-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 I/J-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 I/J band tube.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1978
- Accession Number
- ADA063928
Entities
People
- Robert R. Moats