%0 Journal Article
%T High-Gain Low Side Lobe Level Fabry Perot Cavity Antenna with Feed Patch Array
%A Avinash R. Vaidya
%A Rajiv Kumar Gupta
%A Sanjeev Kumar Mishra
%A Jayanta Mukherjee
%J PIER    C
%D 2012
%I EMW Publishing
%R 10.2528/PIERC12031503
%X In this paper, a high gain, low side lobe level Fabry Perot Cavity antenna with feed patch array is proposed. The antenna structure consists of a microstrip antenna array, which is parasitically coupled with an array of square parasitic patches fabricated on a FR4 superstrate. The patches are fabricated at the bottom of superstrate and suspended in air with the help of dielectric rods at 0.5¦Ë height. Constant high gain is obtained by resonating parasitic patches at near close frequencies in 5.725-5.875 GHz ISM band. The structure with 9 ¡Á 9 square parasitic patches with 1.125¦Ë spacing between feed elements is fabricated on 5¦Ë ¡Á 5¦Ë square ground. The fabricated structure provides gain of 21.5 dBi associated with side lobe level less than -25 dB, cross polarization less than -26 dB and front to back lobe ratio of more than 26 dB. The measured gain variation is less than 1 dB and VSWR is less than 2 over 5.725-5.875 GHz ISM band. The proposed structures are good candidates for base station cellular systems, satellite systems, and point-to-point links.
%U http://www.jpier.org/pierc/pier.php?paper=12031503