A high-gain broadband microstrip patch antenna using a PTFE substrate of dielectric constant 2.4 with a modified radiating patch is proposed. Two different shapes of ground planes (rectangular and circular) have been used under the proposed radiating patch to enhance the antenna gain. The lateral dimensions of the proposed patch are 0.52λ0 × 0.51λ0, where λ0 is the free space wavelength at f0 = 5.65 GHz. Here a total of five slits and a slot are embedded at the optimum position on the proposed patch. The effects of each slits on bandwidth and gain are demonstrated. The covered frequency band is 2 GHz (5.5–7.5 GHz). The achieved peak gains are 7 dBi at 5.65 GHz and 9 dBi at 7.5 GHz. The percentage bandwidth of 30.77 is achieved. It may be used in industrial, scientific and medical band, WLAN (5.8 GHz), WiMAX, and satellite communication applications.
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Mondal et al. (2019) studied this question.
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