Abstract
A Novel Circularly Polarised Microstrip antenna with parasitic ring is proposed for Beidou Navigation Satellite System. The antenna comprises of a double layer arrangement with Circular patch, rectangular stub and parasitic ring. The Widen Vertical HPBW and high gain at low elevation angle is the demand of the satellite system. Hence vertical HPBW is widened by using FR4 substrate with 1.6 thickness as 140° and high gain at low elevation angle is obtained by using Parasitic Ring is about -1.8dB
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