High‐directivity patch antenna with both photonic bandgap substrate and photonic bandgap cover

A new patch antenna system, which has both a photonic bandgap (PBG) substrate and a PBG cover, is proposed in the present paper. The impedance, radiation pattern, and directivity of such an antenna are studied by the finite-different time-domain method. The results show that the directivity of the PBG antenna is significantly improved. The dependence of the directivity on the frequency and other parameters is also studied. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 41–44, 2001.

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