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Design of tunable modes and dual-band circular patch antenna using shorting posts

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2 Author(s)
Chakravarty, T. ; Millimetre Wave Tech. Group, SAMEER, Calcutta, India ; De, A.

A simple analysis tool is presented, which can predict the resonant frequencies of all normal modes of a circular patch radiator when loaded with a number of passive conducting posts, distributed along the circumference of a circle concentric with the patch radiator. Two specific cases are investigated, where either the resonant frequencies can be tuned in a predictable manner or a closely spaced dual-band antenna with flexible band separation can be designed. It is also shown that for a perturbed circular patch TM01 is the mode with lowest non-zero resonant frequency

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Microwaves, Antennas and Propagation, IEE Proceedings  (Volume:146 ,  Issue: 3 )