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2012-04-13

High-Gain Low Side Lobe Level Fabry Perot Cavity Antenna with Feed Patch Array

Avinash R. Vaidya,

Dr. Avinash R. Vaidya

Electrical Engineering Department

Indian Institute of Technology (IIT) Bombay

India

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Rajiv Kumar Gupta,

Prof. Rajiv Kumar Gupta

Department of Electronics and Telecommunication

Terna Engineering College

India

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Sanjeev Kumar Mishra,

Dr. Sanjeev Kumar Mishra

Electronics and Telecommunication

IIIT Bhubaneswar

India

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Jayanta Mukherjee

Prof. Jayanta Mukherjee

Department of Electrical Engineering

Indian Institute of Technology (IIT) Bombay

India

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Progress In Electromagnetics Research C, Vol. 28, 223-238, 2012

doi:10.2528/PIERC12031503

Abstract

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 0.5λ₀ 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 × 9 square parasitic patches with 1.125λ₀ spacing between feed elements is fabricated on 5λ₀ × 5λ₀ 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.

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Avinash R. Vaidya, Rajiv Kumar Gupta, Sanjeev Kumar Mishra, and Jayanta Mukherjee, "High-Gain Low Side Lobe Level Fabry Perot Cavity Antenna with Feed Patch Array," Progress In Electromagnetics Research C, Vol. 28, 223-238, 2012.
doi:10.2528/PIERC12031503

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