Low-Cost, Crossed-Field Amplifier Meanderline Circuit Concepts.
Abstract
Experimental results of new, potentially low-cost, crossed-field amplifier (CFA) anode circuits are presented and compared with state-of-the-art structures. The shaped-substrate meanderline (SSML) has emerged as the optimum choice for achieving the desired low-cost objectives without compromising the excellent electrical characteristics of available injected beam CFA's (IBCFA). L-Band and S-Band meanderline circuits were designed and constructed on primarily low-dielectric constant substrates. Design aspects were investigated to optimize bandwidth and interaction impedance while maintaining simplified, low-cost structures. Circuit fabrication techniques using arc-plasma-sprayed (APS) spinel were evaluated and found deficient in the areas of low circuit attenuation and surface regularity. Laser machining techniques, which will be covered in another report, have recently emerged as the most promising approach for resolving SSML fabrication problems, and achieving low-cost circuit structures. A simulated, SSML, S-Band, anode design on beryllia dielectric was formulated and subsequently utilized by Northrop Corporation in a contractual effort to verify the circuit design in an operational CFA. Results of that hot-test are presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1978
- Accession Number
- ADA061147
Entities
People
- Calvin D. Bates
- Joseph H. Hartley
Organizations
- United States Army Communications-Electronics Command