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Rectangular Microstrip Antenna for Symmetrical 3-D Beam widths.for an Efficient Feed of Reflector Antenna and its Quantitative Analysis

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Journal of Electromagnetic Analysis and Applications 2012年第6期4卷 230-234页

作者： Jitendra Kr. Sah Sun Chatterjee Pragya Bharati Dia Ghosh Aditi Anand Sudipta Chattopadhyay Department of ECE Siliguri Institute of Technology P.O-Sukna Darjeeling 734009 WB India

A simple rectangular microstrip antenna on low dielectric constant substrate such as air for improved radiation beam performance is theoretically investigated. The conventional patch antenna fabricated on common substrates always produces quite broader E plane pattern compared to its H plane. In the present investigation, the same microstrip antenna is designed on air substrate with a view to develop an efficient feed for parabolic reflector antenna, which shows an excellent radiation pattern with symmetrical 3 dB beam widths.at its both E and H plane. The present antenna compared to conventional structure to show its excellence in the beam performance is presented. The complete quantitative analysis to explore such radiation beam characteristics for both the structures (conventional and the present one) is also presented in this paper. An easy and handful relationship between the length of patch antenna and its fringing length for different types of substrate is established in the background of 3 dB beam widths. The proposed idea has been verified through a commercial software package for a patch operating in X band and a concrete physical insight into the phenomenon is developed.

关键词： Air Substrate Rectangular Microstrip Antenna Symmetrical Beam widths.

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