Abstract
This article presents a compact 5G dual-wideband bandpass filter (DBPF) based on high-conductivity graphene assembled films (GAFs), which can meet the requirements of the sub-6 GHz bands, high integration and high information transmission rate for 5G wireless communication. The GAF DBPF consists of two folded open-loop stepped-impedance resonators with a compact size of 21.9 mm × 22.5 mm × 0.53 mm. The measured results show that the presented GAF DBPF has two passbands with 3 dB fractional bandwidths of 15.95% and 12.72% at center frequencies of 2.14 and 3.5 GHz, respectively. In addition, the filter exhibits an attenuation level greater than 20 dB up to 7.52 GHz.
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