{"title":"Adjustable Triple-Band Triple-Mode Dielectric Waveguide Filter With Multiple Transmission Zeros","authors":"Zhe Wang;Yongle Wu;Zuoyu Xu;Yuan Yao;Weimin Wang","doi":"10.1109/LMWT.2024.3389968","DOIUrl":null,"url":null,"abstract":"In this design, an adjustable triple-band triple-mode dielectric waveguide (DW) bandpass filter with multiple transmission zeros (TZs) is presented. The design involves creating blind holes and a slot in the dielectric resonator to control the operating frequencies of the three transmission modes (TM010, TM020, and quasi-TM), each forming a passband. By modifying the slot height to convert the third resonant mode into a spurious mode, a dual-band dual-mode filter can be obtained. Besides, two TZs are introduced between adjacent passbands, significantly improving out-of-band rejection. To demonstrate the concept, a triple-band filter utilizing the DW resonator is manufactured, post-processed, and measured. The center frequencies for the three bands are 2.24, 2.94, and 3.52 GHz, with the in-band insertion loss of 0.49, 0.36, and 0.73 dB, respectively. The in-band return losses are better than 16 dB.","PeriodicalId":73297,"journal":{"name":"IEEE microwave and wireless technology letters","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE microwave and wireless technology letters","FirstCategoryId":"1085","ListUrlMain":"https://ieeexplore.ieee.org/document/10508804/","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"0","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
In this design, an adjustable triple-band triple-mode dielectric waveguide (DW) bandpass filter with multiple transmission zeros (TZs) is presented. The design involves creating blind holes and a slot in the dielectric resonator to control the operating frequencies of the three transmission modes (TM010, TM020, and quasi-TM), each forming a passband. By modifying the slot height to convert the third resonant mode into a spurious mode, a dual-band dual-mode filter can be obtained. Besides, two TZs are introduced between adjacent passbands, significantly improving out-of-band rejection. To demonstrate the concept, a triple-band filter utilizing the DW resonator is manufactured, post-processed, and measured. The center frequencies for the three bands are 2.24, 2.94, and 3.52 GHz, with the in-band insertion loss of 0.49, 0.36, and 0.73 dB, respectively. The in-band return losses are better than 16 dB.