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Design of a Coplanar Integrated Microstrip Antenna for GPS/ITS Applications

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3 Author(s)
Kunpeng Wei ; State Key Lab of Microwave and Communications, Department of Electronic Engineering, Tsinghua University, Beijing, China ; Zhijun Zhang ; Zhenghe Feng

This letter presents a novel low-profile coplanar multifunctional microstrip antenna for both global positioning system (GPS) and intelligent transportation system (ITS) applications. The multifunctional antenna consists of two parts: a directional coupled square-ring patch antenna and a center-fed square-ring loaded patch antenna. A coplanar simple single-fed method is proposed in the directional coupled square-ring patch antenna, which operates at the fundamental TMn mode with right-handed circular polarization at the GPS L2 frequency of 1.227 GHz. More-over, the square-ring is also utilized to load the center-fed square patch antenna at TM02 mode with a vertical linear polarization for ITS application, which considerably increases the impedance bandwidth. Very good consistency between the measurement and simulation for the return loss and radiation patterns is achieved.

Published in:

IEEE Antennas and Wireless Propagation Letters  (Volume:10 )