空间电子技术2023，Vol.20Issue(6)：1-6,6.DOI:10.3969/j.issn.1674-7135.2023.06.001
基于液体金属的接触PIM抑制方法和实验验证
Liquid metal based contact PIM suppression schemes and experimental study
摘要
Abstract
Contact nonlinearity is one of the important causes of passive intermodulation(PIM)signals in radio frequency equipment and circuits.Based on the analysis of the radio frequency equivalent circuit of the contact node,this paper proposes a PIM suppression method using eutectic gallium-indium(EGaIn)liquid metal alloy.EGaIn is different from traditional solder because it can achieve stable and reconfigurable connections at room temperature for the contact node positions.Firstly,the circuit model of the contact node under radio frequency is analyzed.Then,two printed inverted-F antennas(PIFAs)with different metal contact structures operating at 2.6 GHz are designed and implemented.Finally,the intermodulation indices of the PIFA before and after EGaIn soldering are compared,with the PIM index being reduced by up to 35 dB.This paper verifies that EGaIn can achieve reconfigurable soldering of the contact node positions of the PIFA at room temperature,providing a reference method for nonlinear suppression in electrical connections.关键词
平面倒F天线/液体金属/无源互调/接触非线性Key words
planar inverted F antenna/liquid metal/passive intermodulation/contact nonlinearity分类
电子信息工程引用本文复制引用
张可越,陈雄,赵小龙,张松昌,曹智,贺永宁..基于液体金属的接触PIM抑制方法和实验验证[J].空间电子技术,2023,20(6):1-6,6.基金项目
国家自然科学基金面上资助(编号:62271240) （编号:62271240）
国家重点实验室基金(编号:6142411232204) （编号:6142411232204）
