Planar array antenna using both‐sided MIC's feeder circuits

Abstract

Abstract In this paper, it is proposed that the “both‐sided” circuit technique, which consists of placing several types of transmission lines on both sides of the dielectric substrate, be used for array antenna feed systems. Microstrip lines are used on the front surface of the dielectric substrate, and slot lines are placed on the back side. By means of electromagnetic coupling, a new feed system is constructed. Further, trial fabrication and testing of a four‐element array antenna using this feed system were carried out. The measured radiation patterns indicate complementary effects caused by feeding of the radiating elements with mirror symmetry. Excellent characteristics substantially reducing unwanted cross‐polarization are confirmed. © 2004 Wiley Periodicals, Inc. Electron Comm Jpn Pt 1, 87(7): 23–30, 2004; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/ecja.10179