On-demand frequency tunability of fluidic antenna implemented with gallium-based liquid metal alloy

被引：8

作者：

Kim, Daeyoung ^{[1
]}

Doo, Seok Joo ^{[1
]}

Won, Heong Sup ^{[1
]}

Lee, Woojin ^{[1
]}

Jeon, Jinpyo ^{[2
]}

Chung, Sang Kug ^{[2
]}

Lee, Gil-Young ^{[3
]}

Oh, Semyoung ^{[3
]}

Lee, Jeong-Bong ^{[4
]}

机构：

[1] Korea Army Acad, Dept Informat & Commun Engn, Yeongcheon 38900, South Korea

[2] Myoungji Univ, Dept Mech Engn, Yongin 17058, South Korea

[3] Korea Air Force Acad, Dept Elect & Commun Engn, Cheongju 28187, South Korea

[4] Univ Texas Dallas, Dept Elect Engn, Richardson, TX 75080 USA

来源：

EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS | 2017年 / 78卷 / 01期

关键词：

ELECTRONICS;

D O I：

10.1051/epjap/2017160346

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated frequency tunability of a microfluidic-based antenna using on-demand manipulation of a gallium-based liquid metal alloy. The fluidic antenna was fabricated by polydimethylsiloxane (PDMS) and filled with the gallium-based liquid metal alloy (Galinstan (R)). It is composed of a digital number "7"- shaped feedline, and a square-shaped and a digital number "6"- shaped patterns, which are all implemented with the liquid metal. The gallium-based liquid metal was adhered to the channel surface due to its viscous oxide layer originating from the gallium oxide forming when it exposed to the air environment. We treated the liquid metal with hydrochloric acid solution to remove the oxide layer on the surface resulting in easy movement of the liquid metal in the channel, as the liquid metal surface has been transformed to be non-wettable. We controlled the physical length of the liquid metal slug filled in feedline with an applied air pressure, resulting in tuning the resonant frequency ranging from 2.2 GHz to 9.3 GHz. The fluidic antenna properties using the liquid metal's electrical conductivity and mobility were characterized by measuring the return loss (S11), and also simulated with CST Microwave Studio.

引用

页数：5

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