Summary
International Symposium on Antennas and Propagation
2011
Session Number:ThE3
Session:
Number:ThE3-4
A Broad-Beam Antenna Using Nonuniform MSA Parasitic Array Excited by Cavity-Backed Slot
Thana Puklibmoung, Piyaporn Krachodnok, Rangsan Wongsan,
pp.-
Publication Date:2011/10/25
Online ISSN:2188-5079
Summary:
This paper presents a broad-beam antenna using the techniques of nonuniform microstrip patches parasitic array, which is excited by the cavity-backed slot. To achieve broad-beam antenna, phase of each element of the microstrip array has been designed to emulate the reflection of waves on the surface of parabolic backscatter by adjusting the parasitic patches size. In order to increase the efficiency of this array antenna, the back-slot cavity with an exciting probe will be used for coupling the electromagnetic waves to the back of this array. The proper sizes and locations of patches and the optimized position of cavity have been investigated by computer simulation technology (CST) software. Finally, the optimized parameters of this antenna are chosen and the simulation results show the maximum gain and half-power beamwidth of 4 dBi and 120o, respectively.