Comparison of the Performance between a Parasitically Coupled and a Direct Coupled Feed for a Microstrip Antenna Array

Sai Ho Yeung, Alejandro Garcia-Lamperez, Tapan Kumar Sarkar, Magdalena Salazar-Palma

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

This communication presents an alternate methodology - parasitically coupled feed - for exciting a four element microstrip array radiating primarily in the broadside direction. Typically, a four element microstrip array is fed directly through a corporate feed network using T-junctions and quarter wave transformers. The proposed parasitically coupled feeding of the array simplifies the geometry and results in a smaller size for the array. In this study, the matching of the microstrip array and the radiation characteristics of the two different feeding mechanisms are simulated using an electromagnetic analysis code and then implemented in hardware for comparison of the performance of each mechanism. The microstrip line based array feed and the parasitically coupled feed both have similar bandwidth characteristics and radiate in the broadside direction with similar gains. The simulated efficiency of the proposed parasitically fed broadside array antenna is around 85% to 90% over majority of the bandwidth and compares well with the conventional direct feed structure.

Original languageEnglish (US)
Article number6729063
Pages (from-to)2813-2818
Number of pages6
JournalIEEE Transactions on Antennas and Propagation
Volume62
Issue number5
DOIs
StatePublished - May 2014

Keywords

  • Broadside array antenna
  • microstrip antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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