A Compact, Portable EHF/SHF Antenna for Advanced SCAMP
Abstract
SCAMP is a small, single-channel, antijam, man-portable terminal used for extremely high frequency (EHF) satellite communication. Since its development in 1987. it has repeatedly demonstrated successful communication through the EFIF packages on the FLTSAT-7 and -8 Navy communications satellites. Advanced SCAMP is the second generation small terminal, highly elevated in performance and significantly reduced in weight, currently being developed at Lincoln Laboratory. Pertinent parameters are its 30-lb total weight, 75- to 2,400-bps data rate, and 24-in antenna aperture. Starting with the basic dual-band feed developed for another application, a compact, high-performance, EHF dual-band ring-focus feed with an elliptical subreflector was developed for a displaced axis parabolic reflector. This reflector is made up of six lightweight deployable petals for portability. The feed weighs less than 1 lb, and the reflector weighs 2.6 lb. The measured added loss due to imperfections of the petal reflector for the 44.5- and 20.7-GHz bands are 0.3 and 0.1 dB, respectively. An overall antenna efficiency of about 65% and 55% in the Q- and K-bands, respectively, was achieved. Antenna and feed design considerations, measured performance, and other possible applications for this antenna are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 22, 1993
- Accession Number
- ADA272614
Entities
People
- Joseph C. Lee
Organizations
- Massachusetts Institute of Technology