DESIGN OF A CIRCULARLY POLARIZED RECTANGULAR MICROSTRIP ANTENNA FOR GPS APPLICATIONS

作者：Nishamol M S; Sarin V P; Tony D; Aanandan C K; Mohanan P; Vasudevan Kesavath^*

来源：Microwave and Optical Technology Letters, 2011, 53(2): 468-470.

DOI：10.1002/mop.25706

• axial ratio
• circular polarization
• GPS
• microstrip antenna

A compact design of a single feed microstrip antenna for circular polarization (CP) is proposed and studied. CP is brought about by embedding a slot in a cross shaped patch. The structure. enables an area reduction of 46% as compared to conventional rectangular microstrip antenna. The antenna offers a 2:1 VSWR bandwidth from 1.53 to 1.61 GHz on a substrate of dielectric constant 4.4 and height 1.6 mm with a broadside radiation characteristic in the entire band. The 3 dB axial ratio bandwidth of the antenna is 5% with moderate gain that covers global positioning system (GPS) L1 band. Simulation and experimental results of the antenna are presented and discussed.

• 出版日期2011-2