1.8:1 Bandwidth UHF 3 X 3 Array of Crossed Open-Sleeve Dipoles
Abstract
A circularly polarized nine-element (3 x 3) planar array antenna system has been evaluated for use on a synchronous satellite. The array elements are mounted on a 104-in. square reflector, and the basic radiating element is a crossed open-sleeve dipole with good VSWR and pattern characteristics over a 1.8:1 frequency band (225 to 400 MHz). The electrical performance of the antenna was measured using a half-scale model. It is shown that the antenna can provide an EOE gain (gain in the direction of the edge-of- the-earth) of greater than 14 dB from 225 to 250 MHz and greater than 11 dB from 250 to 400 MHz, based on the results of the half-scale model measurements. The measured axial ratio is less than 1.6 dB throughout the entire operating frequency band.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1972
- Accession Number
- AD0745577
Entities
People
- Howard E. King
- Jimmy L. Wong
Organizations
- The Aerospace Corporation