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Chiral cover effects on microstrip antennas

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2 Author(s)
Bilotti, F. ; Dept. of Electron. Eng., Univ. of Roma Tre, Rome, Italy ; Vegni, L.

By exploiting a rigorous variational formulation, we point out the main effects of a chiral cover on a cavity backed microstrip patch antenna. A hybrid finite element-boundary integral method is employed to solve numerically the electromagnetic problem modeled by a variational functional. The dependence of the resonance frequency on the cover thickness and on the chirality admittance of the material is first investigated. In more detail, it is demonstrated that a chiral cover permits reducing the antenna dimensions, compared to an isotropic one, for a fixed working frequency. Then, through several numerical examples, we also investigate the variation of gain properties, cross-polarization levels, radiation resistance, radiation efficiency, and radar cross-section.

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Antennas and Propagation, IEEE Transactions on  (Volume:51 ,  Issue: 10 )