摘要
分析了单一左、右手传输线的电路特性,并利用其非线性相位特性,设计了一种平面、低损耗的宽带180°移相功分器。首先通过调节单一左、右手传输线的结构参数,并与传统传输线进行相位比较,在单一左、右手传输线的通带内实现45°相位差,然后将4个传输线单元级联构建了180°移相器,最后采用180°移相器设计了相位差为180°移相功分器。移相功分器的测试结果表明,在3-8.3GHz内,反射系数小于-10dB,输出端口间的隔离度大于17dB,输出端口间的幅度差小于0.6dB,相位差为180°±5°。该结构性能优良,制作成本低,适用于宽带天馈系统。
By analyzing the circuit characteristics of simplified right/left handed transmission line（SRLH TL）and utilizing its nonlinear phase features,aplanar,low insertion loss 180°phase shift power divided is designed.Firstly,a 45°phase difference between the SRLH TL and the conventional TL is obtained by adjusting the parameters.Then,a 180°phase shift is designed based four cascaded units,which is utilized for broadband 180°phase shift power divider.The measured results indicated that the proposed 180°phase shift power divider achieves 3-8.3GHz bandwidth with return loss of less than-10 dB,isolation of more than 17 dB,magnitude difference of less than0.6dB and phase difference of 180°± 5°.The proposed divider has the features of good performance and low cost and is suitable for broadband antenna feed system.
出处
《压电与声光》
CSCD
北大核心
2015年第1期13-16,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金基金资助项目(61372034)
关键词
单一左、右手传输线
相位特性
移相功分器
simplified right/left handed transmission line
phase-frequency response
phase shift power divider
