Corner fed microstrip antenna array with reduced cross polarization and side lobe level

Abstract

This paper presents design and analysis of large corner fed microstrip antenna array at C band. Two configurations of corner fed arrays are designed to analyze and compare their performance. Symmetric corner feed configuration provides reduced side lobe level and cross polarization level. A series of non-radiating edge corner fed linear array up to 31-elements are designed with a stable broadside beam, low cross polarization level and reduced side lobe level. Cross-polarization of lower than −35dB is achieved with beam directed at the boresight. Planar array of 13 × 13 elements is designed using corner fed technique in E and H planes which provides moderate gain of 24dBi at C band. The side lobe level of lower than −20dB and − 14dB in E and H plane is achieved. However, cross polarization of lower than −23dB in E and H plane respectively, is achieved at the boresight for this planar array. This array can be used for long range radar and WLAN applications.