A low‐profile tapered double cross patch antenna (TDCPA) with dual‐band monopole‐like radiation characteristic is proposed. The proposed TDCPA consists of a center‐fed circular patch on the middle layer to excite a TM 01 mode and a double cross patch on the top layer to generate the dual‐band characteristic. The antenna has monopole‐like radiation in the industrial, scientific, and medical (ISM) 2.45 GHz band and ISM 5.8 GHz band. The corresponding fractional 10‐dB return loss bandwidths and maximum gains are 3.67% and 4.5 dBi for the lower frequency band and 14.7% and 6.5 dBi for the higher frequency band, respectively. The antenna has only 0.038 λ 0 thickness.
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Tak et al. (2014) studied this question.
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