{"title":"基于微带- cpw结构的可补偿耦合可重构带通滤波器","authors":"Zhi-Han Chen, Shi-Xuan Zhang, Q. Chu","doi":"10.1109/APMC.2015.7413505","DOIUrl":null,"url":null,"abstract":"A reconfigurable bandpass filter with compensable coupling and constant absolute bandwidth (ABW) is proposed. The fundamental structure is based on two coplanar waveguide (CPW) resonators and a microstrip-to-CPW transition. Four varactors embedded in the resonators and feed-lines are utilized to adjust center frequency and external coupling, separately. Moreover, this novel feeding structure generates an adjustable transmission zero (TZ) at lower stopband. For demonstration, a second-order filter is implemented with center frequency range of 1.87-2.37 GHz (i.e., 23.6% fractional tuning range) and a constant 3-dB ABW of 410±10 MHz. Specifically, the return loss of passband at each tuning state can achieve greater than 15 dB.","PeriodicalId":269888,"journal":{"name":"2015 Asia-Pacific Microwave Conference (APMC)","volume":"233 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"A novel reconfigurable bandpass filter with compensable coupling based on microstrip-to-CPW structure\",\"authors\":\"Zhi-Han Chen, Shi-Xuan Zhang, Q. Chu\",\"doi\":\"10.1109/APMC.2015.7413505\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A reconfigurable bandpass filter with compensable coupling and constant absolute bandwidth (ABW) is proposed. The fundamental structure is based on two coplanar waveguide (CPW) resonators and a microstrip-to-CPW transition. Four varactors embedded in the resonators and feed-lines are utilized to adjust center frequency and external coupling, separately. Moreover, this novel feeding structure generates an adjustable transmission zero (TZ) at lower stopband. For demonstration, a second-order filter is implemented with center frequency range of 1.87-2.37 GHz (i.e., 23.6% fractional tuning range) and a constant 3-dB ABW of 410±10 MHz. Specifically, the return loss of passband at each tuning state can achieve greater than 15 dB.\",\"PeriodicalId\":269888,\"journal\":{\"name\":\"2015 Asia-Pacific Microwave Conference (APMC)\",\"volume\":\"233 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2015-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2015 Asia-Pacific Microwave Conference (APMC)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/APMC.2015.7413505\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2015 Asia-Pacific Microwave Conference (APMC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APMC.2015.7413505","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A novel reconfigurable bandpass filter with compensable coupling based on microstrip-to-CPW structure
A reconfigurable bandpass filter with compensable coupling and constant absolute bandwidth (ABW) is proposed. The fundamental structure is based on two coplanar waveguide (CPW) resonators and a microstrip-to-CPW transition. Four varactors embedded in the resonators and feed-lines are utilized to adjust center frequency and external coupling, separately. Moreover, this novel feeding structure generates an adjustable transmission zero (TZ) at lower stopband. For demonstration, a second-order filter is implemented with center frequency range of 1.87-2.37 GHz (i.e., 23.6% fractional tuning range) and a constant 3-dB ABW of 410±10 MHz. Specifically, the return loss of passband at each tuning state can achieve greater than 15 dB.