Design of an improved microstrip antenna operating at a frequency band of 28GHz
The design of an improved microstrip antenna operating in the 28 GHz frequency spectrum is the main goal of this work. The design used a Roger RT 5880 LZ substrate with a thickness and permittivity of 0.762mm and 1.96, respectively. The antenna was simulated in CST Microwave Studio. As the antenna feed, a quarter-wave transformer was used to provide an impedance match of 50 ohms. To improve the antenna's performance, a Ushaped element was added to the ground plane. The antenna resonated at 28 GHz frequency, according to simulation data, with a return loss of -21.4 dB, VSWR of 1.18, bandwidth of 2.026 GHz, and gain of 8.19 dB. The proposed antenna exhibits a performance improvement in terms of gain and bandwidth due to the addition of U-shaped element when benchmarked with existing designs in the literature work
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