电波科学学报2018，Vol.33Issue(2)：156-161,6.DOI:10.13443/j.cjors.2017101001
一种新型高隔离四端口双工器设计
A novel design of 4-port diplexer with high isolation
摘要
Abstract
A high isolated 4-port diplexer based on microstrip line is presented in this paper.The diplexer is composed of two pairs of filters operating different frequency,each pair include 2 filters with phase of 90° and-90°.The diplexer can achieve an isolation enhancement compared with some reported 3-port diplexers,resulting from the 4-port circuit topology and difference of phase 180° suppresses the leakage between the two channels.The filter of proposed 4-port diplexer is based on half-wavelength open-loop resonator structure,which enables the inverter without incurring any extra circuit footprint.For valida tion,the diplexer with operating frequencies of 1.8 GHz and 2.1 GHz is designed,fabricated and meas ured.The experimental results show that the 4-port diplexer has good in-band performance and high isola tion of 50.9 dBand43.5 dB.Compared to the traditional3-port diplexer,the4-port diplexer increased by 9.7 dB and 12.8 dB respectively,which indicates that the novel diplexer increased the isolation significantly.关键词
双工器/高隔离度/带通滤波器/相位响应/四端口Key words
diplexer/high isolation/band-pass filter/phase response/4-port分类
信息技术与安全科学引用本文复制引用
贺旺,陆云龙,黄季甫,李凯..一种新型高隔离四端口双工器设计[J].电波科学学报,2018,33(2):156-161,6.基金项目
浙江省自然科学青年基金(LQ17F010002) （LQ17F010002）
浙江省教育厅项目(Y201533641) （Y201533641）
宁波市自然科学基金(2016A610063,2016A610060) （2016A610063,2016A610060）
