工作频率比可控的微带-缝隙双频耦合器设计  

Design of Microstrip-Slot Dual-Frequency Coupler with Controllable Frequency Ratio

作　　者：陈强[1] 陆云龙[1] 周望 郭鹏程 CHEN Qiang;LU Yun-long;ZHOU Wang;GUO Peng-cheng(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211

出　　处：《微波学报》2022年第3期91-96,共6页Journal of Microwaves

基　　金：国家重点研发计划(2018YFB1802100);国家自然科学基金(62171242,61801252,U1809203,61631012);广东省重点领域研发计划(2019B010156004);浙江省省属高校基本科研业务费专项资金(SJLY2020001)。

摘　　要：针对单一工作频段的微带-缝隙耦合器,提出了一种级联两段微带-槽线传输线的微带-缝隙双频耦合器。通过槽线补偿线对耦合器奇模相速度进行补偿,使奇模相速度近似于偶模相速度,从而改善器件的工作带宽。为指导设计,将对称四端口网络奇偶模的分析拓展到微带-缝隙双频耦合器的设计中,并给出了详细的计算公式。与其他双频定向耦合器相比,该结构实现了工作频率可控的双频等分设计,且每个工作频段带宽更宽。为验证设计方法,设计了一个工作频率在2.4 GHz/5.8 GHz的微带-缝隙双频耦合器。实测结果与仿真数据相吻合,证明了该设计方法的有效性。In this paper,a dual-band microstrip-slot coupler cascaded two microstrip-slot transmission lines is proposed for single frequency band microstrip-slot coupler.The odd-mode phase velocity of the coupler is compensated by a slot-line compensation line,which makes the odd-mode phase velocity approximate to that of the even-mode phase velocity.To guide the design,this paper extends the analysis of symmetrical four-port network odd-even mode to the design of microstrip-slot dual-frequency couplers,and gives the detailed calculation formula.Compared with other dual-band power dividers and directional couplers,this architecture realizes the design of dual-band equipartition with controllable working frequency,and the bandwidth of each working frequency band is wider.In order to verify the design method,a microstrip-slot dual-frequency coupler operating at 2.4/5.8 GHz is designed.The experimental results are in a good agreement with the simulation data,which proves the effectiveness of the design method.

关 键 词：微带-缝隙耦合器 微带-槽线 补偿线 级联传输线 奇偶模分析 

分 类 号：TN622[电子电信—电路与系统]