基于慢波半模基片集成波导的等长等宽小型化移相器  

Miniaturized Equal-Length Equal-Width Phase Shifter Based on Slow-Wave Half-Mode Substrate Integrated Waveguide

作　　者：黄文[1] 陈肖 任仪[1] HUANG Wen;CHEN Xiao;REN Yi(School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《电子学报》2023年第10期2747-2753,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61871063)。

摘　　要：针对基片集成波导移相器小型化、高性能的需求,本文提出了基于慢波半模基片集成波导(Slow-Wave Half-Mode Substrate Integrated Waveguide,SW-HMSIW)的等长等宽小型化移相器.该SW-HMSIW上层金属表面由微带折线单元周期性加载构成,提高了SW-HMSIW的等效介电常数和磁导率,从而降低了SW-HMSIW的截止频率和相速度,实现了慢波效应并获得尺寸的减小.此外,可以通过调节微带折线单元横向和纵向的尺寸,灵活调节SW-HMSIW的相速度和截止频率.基于这一原则,本文设计实现了SW-HMSIW等长等宽小型化移相器,同时它具有较宽的工作带宽.测试结果表明,所设计的移相器在8.7~14.2 GHz内实现了90°±4°的相移量,相对带宽为48%,回波损耗优于12 dB,具有良好的传输性能和移相效果,并且具有小型化和等长等宽结构特点,适用于在大规模阵列天线的应用.A miniaturized phase shifter with equal length and equal width based on slow-wave half-mode substrate in⁃tegrated waveguide(SW-HMSIW)is proposed to meet the requirements of miniaturization and high performance of the sub⁃strate integrated waveguide phase shifter.The upper metal surface of the proposed SW-HMSIW is periodically loaded of microstrip folded-line units,which improves its equivalent permittivity and permeability,thereby reducing the cut-off fre⁃quency and phase velocity of SW-HMSIW,thus realizing slow-wave effect and size reduction.In addition,the horizontal and longitudinal dimensions of the microstrip folded-line unit can be adjusted to flexibly adjust the phase velocity and cutoff frequency of SW-HMSIW.Based on this principle,a miniaturized SW-HMSIW phase shifter with equal length and equal width is designed with a wide working bandwidth.The measured results show that the designed phase shifter is achieved a phase shift of 90°±4°within 8.7-14.2 GHz,the relative bandwidth is 48%,and the return loss is better than 12 dB.It has good transmission performance and phase shifting effect,and it has the advantage of miniaturization and equal-length and equal-width structure,so it is suitable for the application of large-scale array antennas.

关 键 词：移相器 基片集成波导 小型化 慢波结构 

分 类 号：TN623[电子电信—电路与系统]