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Rectangular Microstrip Antenna with Air Cavity for High Gain and Improved Front to Back Ratio

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Author(s): Kaushik Malakar | Jaydeep Nandi | Souvik Mitra | Prasanta Kumar Gorai | Sudipta Chattopadhyay | Sandip Banerjee

Journal: Journal of Electromagnetic Analysis and Applications
ISSN 1942-0730

Volume: 03;
Issue: 09;
Start page: 368;
Date: 2011;
Original page

Keywords: Air Cavity | Front to Back Radiation | High Gain | Microstrip Antenna

ABSTRACT
A rectangular microstrip patch antenna using conventional Poly Tetra Fluride Ethelene (PTFE) substrate with air cavity is proposed and theoretically investigated. Considerably high gain along with improved front to back radiation isolation is demonstrated using such proposed antenna. The radiation performance of this new antenna has been compared to a conventional microstrip patch for some commonly used aspect ratios (width to length ratio). Compared to conventional microstrip antenna the proposed configuration shows more than 12% increment in peak gain and more than 10% increment in front to back radiation performance in each set of aspect ratio. The elucidation of such improvement in the radiation characteristics of the proposed antenna is also presented.
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