Portable Earth Station Antenna Study System.
Abstract
The Mobile Antenna System requirements should be satisfied by solutions which offer the best antenna system approach and provide the latest in the state-of-the-art technology with little or no risk. The antenna system should be very reliable yet cost effective. For the purpose of this study, only a single main reflector with a single beam system is considered. The recommended approach used to meet the requirements is the result of parametric tradeoffs of mechanical, electrical, logistic, reliability, and cost considerations. The recommended antenna system is a ten-foot diameter parabolic reflector mounted on an ax-el pedestal that is tied to an erectable tower. The tower and the antenna assembly is mounted on a 26-foot flat bed that can be easily transported by C130 cargo plane. The erection mechanism is hydraulic and requires no special tools. Outriggers are provided for stabilizing the flat bed which becomes the pedestal for the tower. The system is designed for an antenna height of 25 feet. The feed is a center-fed cup dipole feed, the cup measuring approximately 9 inches in diameter and about 4 inches deep. The center support is a two-inch diameter lightweight pipe with a support cone at the attachment point of the reflector. The transmit and receive transmission lines plus a polarizing 90-degree hybrid are placed inside this support strut. The solid state transmitter, filters and preamplifier are all located directly behind the vertex of the reflector. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1978
- Accession Number
- ADA054791
Entities
Organizations
- Hughes Aircraft Company