Accession Number : ADP005401

Title :   Wide-Band, Double-Tuned Microstrip Elements,

Corporate Author : ILLINOIS UNIV AT URBANA ELECTROMAGNETICS LAB

Personal Author(s) : Tanner,David R. ; Mayes,Paul E.

Report Date : FEB 1987

Pagination or Media Count : 25

Abstract : Microstrip antennas are popular because of their inherent versatility as low profile multifunctional antennas. Their few disadvantages, however, include a narrow frequency bandwidth for single-mode operation. This has led to the development of dual-band elements for dual-frequency operation. To achieve a continuous bandwidth of operation from elements displaying an inherently resonant behavior, however, requires two or more resonant modes capable of producing similar radiation patterns with a similar quality factor. In addition, the feed system must be capable of exciting these modes in a manner that produces a smooth transition between modes (without intervening stop bands). This paper describes the realization of an element supporting two such modes whose resonant frequencies can be made as close to one another as desired.

Descriptors :   *TUNING DEVICES, *ANTENNAS, BROADBAND, ANTENNA FEEDS

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE