Space-Fed, Offset, Plane Wave Cassegrain System for EHF Applications,
Abstract
This paper describes the study of a spatial combining approach to achieve a tractable design for a physically compact EHF satellite earth terminal antenna system which would address and overcome current 44 GHz solid state RF power generation limitations. Specifically, the achievement of high values (>55 dBW) of uplink EIRP at 44.5 GHz with the use of small diameter (<or= 24 inches) reflector antennas and a single feed requires higher levels of power amplification (typically 10 watts) than currently achievable with individual solid state EHF devices. A solution to this problem is to use spatial power combining of the outputs of an array of feed horns individually driven by low power solid state amplifiers phase locked to a common source. This paper describes the numerical study of such an array used with an offset, plane-wave fed, near-field Cassegrain reflector system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1983
- Accession Number
- ADP001110
Entities
People
- A. R. Dion
- D. L. Washington
- L. M. Schwab
Organizations
- Massachusetts Institute of Technology