Analysis and Synthesis of Microstrip Antennas Including Mutual Coupling
Abstract
An array antenna is an assembly of radiating elements in one of many possible geometrical configurations with outputs of the individual elements in the array combined to produce radiation of desired pattern shape and gain. The advantages of array antennas over a single antenna include the following: 1) high gain and high resolution without increasing the physical size of each element, 2) electronic control of radiation patterns, such as scanning of main beam and shaping of radiation pattern, and 3) graceful degradation. Many techniques have been developed in the synthesis of array patterns. Most of the techniques, however, ignore mutual coupling between array elements. Mutual coupling is the electromagnetic interaction between array elements. In addition, unless the antenna elements are perfectly isolation power dividers are used, there will be coupling through the feed network. The two fold coupling problem (element-to-element and feed network coupling) then becomes difficult for analysis and very difficult for synthesis. This is because coupling from one element to another can travel through the feed network and reappear in other elements leading to further antenna coupling: this is an endless coupling effect.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1988
- Accession Number
- ADA201783
Entities
People
- Koichiro Takamizawa
- Warren L. Stutzman
Organizations
- University of Massachusetts Amherst