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Vol. 172, Issue 6, June 2014, pp. 178-183




Analysis and Design of a Multi-Frequency Microstrip Antenna Based on a PBG Substrate

YANG Hong, WANG Zhi Peng, SHAO Jian Xing

College of Electrical Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China
Tel.: 0086-023-62471716, fax: 0086-023-62471719

E-mail: yanghong@cqupt.edu.cn


Received: 11 April 2014 /Accepted: 30 May 2014 /Published: 3 June 2014

Digital Sensors and Sensor Sysstems


Abstract: Based on the C-shaped microstrip slot antenna, a new photonic band gap substrate for multi-frequency microstrip slot antenna is designed. The antenna has a groove been dug below the radiation plate, within which the radiation plate is placed, and air triangular prism column gaps with different height are placed in the substrate periodically. Numerical simulation is performed for the antenna with Ansoft HFSS10.0, which is a kind of simulation software based on Finite Element Method. Comparing with the C-shaped microstrip slot antenna, the resonant frequency of the antenna was reduced by 230 MHz, and the low frequency bandwidth was increased from 12.63 % to 18.95 %, both the radiation and multi-frequency characteristics of this proposed antenna are improved. The result demonstrates that the structure is efficient in improving the antenna gain and radiation directivity by suppressing surface wave of the microstrip antenna.


Keywords: Photonic band gap structure, C-shaped slot microstrip antenna, Surface wave, Gain.


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