Abstract
This paper presents a dual-band, wideband, high-gain microstrip patch antenna applied to 5G band. The antenna consists of two rectangular radiation patches of different sizes, connected by a microstrip line and fed by a coaxial line. The dual-band is achieved by both rectangular radiation patches producing dual target resonant frequency points. This antenna provides the freedom for adjusting both resonant frequencies independently. To increase the antenna bandwidth, long slots are loaded at specific positions on each rectangular patch, allowing for dual-mode resonance radiation in each frequency band. This antenna operates in a shorted-edge resonant mode, where metal grounding holes added on the patch act as shorting walls. The size of a radiation patch is only half that of a standard resonant mode patch, making this antenna compact in size. Measurement results show that the antenna has an impedance bandwidth of 4.98–5.56 GHz (11.0%) and 5.74–6.62 GHz (14.2%), which completely cover the 5G band of China (5.18–5.52 GHz and 5.74–5.82 GHz). The maximum measured realized gain is 8.1 dB in the low-frequency band and 10.2 dB in the high-frequency band. This antenna offers advantages of dual-band operation, broadband, low-profile, high-gain, which is suitable for 5G band applications with targeted coverage requirements.
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