TANG Jinping,CHEN Changming,LI Yigeng.A Graphene-based Broadband Tunable Attenuator[J].Journal of Chengdu University of Information Technology,2023,38(06):656-660.[doi:10.16836/j.cnki.jcuit.2023.06.006]
一种石墨烯基宽带可调衰减器
- Title:
- A Graphene-based Broadband Tunable Attenuator
- 文章编号:
- 2096-1618(2023)06-0656-05
- Keywords:
- graphene; broadband; dynamic range
- 分类号:
- TN715
- 文献标志码:
- A
- 摘要:
- 提出了一种工作在频带2～6 GHz的小步进、宽动态范围的石墨烯可调衰减器。衰减器采用微带线两边并接石墨烯电阻的结构。通过两组直流电压调节多层石墨烯的阻抗，可实现对衰减量的控制。利用HFSS软件对石墨烯方块电阻尺寸优化仿真，采用滴涂工艺沉积得到精确的石墨烯电阻值，实现了小步进衰减。测试结果表明，在工作频带内衰减器能够实现4.5～55.8 dB的动态范围衰减，能够达到的最小衰减步进值为0.4 dB，回波损耗优于10 dB。研究成果为射频宽带可调衰减器的设计提供了可供选择的一种方案。
- Abstract:
- A graphene-based tunable attenuator with a small step and wide dynamic range operating in the frequency range of 2 to 6 GHz is proposed in this paper. The attenuator consists of several groups of multilayer graphene resistors attached to both sides of the microstrip line. Two DC voltages are used to adjust the impedance of the multilayer graphene, thus realizing the control of the attenuation. The size of the graphene square resistance is optimized using HFSS software, and the precise graphene resistance values are ensured by a drop-coating deposition process, thus achieving a small step attenuation. The experimental results show that the return loss of the attenuator is better than 10 dB in the operating frequencyband, and its minimum attenuation step value can reaches 0.4 dB and attenuation dynamic range is 4.5-55.8 dB. The research results provide an idea for the design of an RF broadband adjustable attenuator.
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备注/Memo
收稿日期:2022-11-28