Flexible printed microwave transmission line with tunable attenuation based on graphene/ion-gel structure

Yuanlong Liang; Lixiang Yao; Shanrong Hu; Jisheng Pan; Xianjun Huang; Peiguo Liu

doi:10.1117/12.2625109

27 March 2022 Flexible printed microwave transmission line with tunable attenuation based on graphene/ion-gel structure

Yuanlong Liang, Lixiang Yao, Shanrong Hu, Jisheng Pan, Xianjun Huang, Peiguo Liu

Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121698A (2022) https://doi.org/10.1117/12.2625109
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China

Abstract

This paper proposes a graphene-based flexible printed attenuator consisting of printed microwave transmission line and graphene/ion-gel tunable structure, which can realize the transmission of microwave signals with tunable attenuation and have flexible conformal characteristics. According to the adjustable resistivity of graphene in microwave band, we utilize ion-gel to produce electric double layer (EDL) effect to adjust the conductivity of graphene at a low bias voltage. The coplanar waveguide (CPW) transmission line is prepared on a flexible substrate by screen printing process. The implementation of this flexible printed attenuator relies on the integration of printed CPW and graphene/ion-gel functional components. The flexible attenuator has an obvious attenuation characteristic at a lower applied bias voltage (1.3V), and the adjustable range of attenuation is greater than 15 dB in the frequency range of 500 MHz - 4.8 GHz. This work demonstrates a proof-of-concept tunable attenuator with the characteristics of dynamically adjustable attenuation, low working voltage, facile fabrication and flexibility, and will provide some references for the future development of planar tunable attenuators.

Citation Download Citation

Yuanlong Liang, Lixiang Yao, Shanrong Hu, Jisheng Pan, Xianjun Huang, and Peiguo Liu "Flexible printed microwave transmission line with tunable attenuation based on graphene/ion-gel structure", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121698A (27 March 2022); https://doi.org/10.1117/12.2625109

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KEYWORDS

Microwave radiation

Signal attenuation

Attenuators

Graphene

Silver

Resistance

Electromagnetism

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