Benefiting from the high conductivity and superb flexibility, graphene-based materials are promising to replace metal for near-field communication (NFC) applications. Herein, we report a flexible NFC tag antenna based on highconductivity graphene-assembled films (HCGAFs) and investigate how the performance of the antenna is affected by antenna design and human body effect.

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.