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Analysis of a ridged circular disc microstrip antenna element using the cavity model

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3 Author(s)

A theoretical analysis of a ridged circular patch microstrip antenna element is presented by modelling it as a cylindrical cavity with a magnetic wall along its edge. The approach is based on conserving the reaction at the ridged position. This antenna, excited in the dominant mode, resonates at higher frequencies and has a wider bandwidth than a simple conventional circular patch antenna with the same size. Design graphs show the variation of the resonant frequency, quality factor, radiation efficiency, feeding position at resonance and bandwidth (VSWR ⩽2), for the dominant mode as a function of the ratio of inner to outer-disc radius for different ridge thicknesses

Published in:

Microwaves, Antennas and Propagation, IEE Proceedings  (Volume:148 ,  Issue: 3 )

Date of Publication:

Jun 2001

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