|In order to meet the requirements for the suppression of mirror frequencies in the 5G RF front end, this paper proposes a novel miniaturized image rejection bandpass (cid:12)lter by loading Stepped-Impedance Resonators (SIR). By analyzing the relationship between the impedance ratio of a half-wavelength SIR and its electrical length, we have designed an improved second-order bandpass (cid:12)lter, which reduces the size by 34.3% compared to traditional (cid:12)ve-order hairpin (cid:12)lters. In order to further enhance the performance of the (cid:12)lter, the use of a radial stub, as opposed to the traditional rectangular open stub, allows for the generation of a wider band transmission zero, which can be analyzed using lumped equivalent circuits. This integration improves the stopband rejection of the (cid:12)lter. The results show that the passband range is 5.35 GHz{6.64 GHz; the rejection in the stopband range 8.10 GHz{ 11.98 GHz is over 45 dB; and the size is only 0.385 (cid:21) g (cid:2) 0 : 295 (cid:21) g .
{"title":"A Novel Miniaturized Image Rejection Bandpass Filter Basing on Stepped-impedance Resonators","authors":"Guangxiu Zhao, Chen Li, Minquan Li, Pingjuan Zhang, Yajing Yan, Xiaming Mo, Ziyun Tu","doi":"10.2528/pierl23063006","DOIUrl":"https://doi.org/10.2528/pierl23063006","url":null,"abstract":"|In order to meet the requirements for the suppression of mirror frequencies in the 5G RF front end, this paper proposes a novel miniaturized image rejection bandpass (cid:12)lter by loading Stepped-Impedance Resonators (SIR). By analyzing the relationship between the impedance ratio of a half-wavelength SIR and its electrical length, we have designed an improved second-order bandpass (cid:12)lter, which reduces the size by 34.3% compared to traditional (cid:12)ve-order hairpin (cid:12)lters. In order to further enhance the performance of the (cid:12)lter, the use of a radial stub, as opposed to the traditional rectangular open stub, allows for the generation of a wider band transmission zero, which can be analyzed using lumped equivalent circuits. This integration improves the stopband rejection of the (cid:12)lter. The results show that the passband range is 5.35 GHz{6.64 GHz; the rejection in the stopband range 8.10 GHz{ 11.98 GHz is over 45 dB; and the size is only 0.385 (cid:21) g (cid:2) 0 : 295 (cid:21) g .","PeriodicalId":20579,"journal":{"name":"Progress in Electromagnetics Research Letters","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69003535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Reconfigurable Bandstop Filter with Switchable CLLs for Bandwidth Control","authors":"M. Smari, S. Dakhli, E. Fourn, F. Choubani","doi":"10.2528/pierl23022206","DOIUrl":"https://doi.org/10.2528/pierl23022206","url":null,"abstract":"","PeriodicalId":20579,"journal":{"name":"Progress in Electromagnetics Research Letters","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69003123","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Loukmane Gherdaoui, Samir Bensaid, Didier Trichet, Hamza Houassine, Nacira Saoudi
{"title":"Complex Magnetic Permeability Evaluation of Steel Fibers Using Eddy Current NDE and Inverse Problem Methods","authors":"Loukmane Gherdaoui, Samir Bensaid, Didier Trichet, Hamza Houassine, Nacira Saoudi","doi":"10.2528/pierl23090804","DOIUrl":"https://doi.org/10.2528/pierl23090804","url":null,"abstract":"","PeriodicalId":20579,"journal":{"name":"Progress in Electromagnetics Research Letters","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135612285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Facile Synthesis, Kinetics and Photocatalytic Study of Ultrasmall Aluminum Nanoparticles","authors":"Hao Wu, Rongrong Zhu, Sichao Du, Hao Xie, Jun Hu","doi":"10.2528/pierl23091806","DOIUrl":"https://doi.org/10.2528/pierl23091806","url":null,"abstract":"","PeriodicalId":20579,"journal":{"name":"Progress in Electromagnetics Research Letters","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136257169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Guanglu Wei, Y. Wang, Jie Liu, Yang Gao, Xiaodong Yao
{"title":"A Novel Highly Selective UWB Bandpass Filter Using Quad-mode Stub-loaded Resonator","authors":"Guanglu Wei, Y. Wang, Jie Liu, Yang Gao, Xiaodong Yao","doi":"10.2528/pierl23010502","DOIUrl":"https://doi.org/10.2528/pierl23010502","url":null,"abstract":"","PeriodicalId":20579,"journal":{"name":"Progress in Electromagnetics Research Letters","volume":"17 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69002403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
|A highly packaged coupler using vertically placed inductors and capacitors (LC)-elements is proposed for 1 and 1.5 Tesla (T) magnetic resonance imaging (MRI) applications. The coupler is made on a 24-layer thickness low temperature co-(cid:12)red ceramic (LTCC) substrate, and the full integration is reached by heaping up LC-elements in the vertical dimension. The coupler has a smallest reported size of only 0 : 0035 (cid:2) 0 : 0021 (cid:2) 0 : 001 (cid:21)g and a wide fractional bandwidth (FBW) of 44%. The measured in-band phase difference between the coupled and through ports and the amplitude imbalance are less than 91 ◦ (cid:6) 0 : 5 ◦ and 0.75 dB, respectively. Comparisons and discussions are also implemented.
{"title":"Highly Packaged LTCC Coupler Using Vertically Stacked LC-elements for 1 and 1.5 Tesla MRI Applications","authors":"Linzi Liu, Zheng Pan, Gang Shi, B. Zhou","doi":"10.2528/pierl23043002","DOIUrl":"https://doi.org/10.2528/pierl23043002","url":null,"abstract":"|A highly packaged coupler using vertically placed inductors and capacitors (LC)-elements is proposed for 1 and 1.5 Tesla (T) magnetic resonance imaging (MRI) applications. The coupler is made on a 24-layer thickness low temperature co-(cid:12)red ceramic (LTCC) substrate, and the full integration is reached by heaping up LC-elements in the vertical dimension. The coupler has a smallest reported size of only 0 : 0035 (cid:2) 0 : 0021 (cid:2) 0 : 001 (cid:21)g and a wide fractional bandwidth (FBW) of 44%. The measured in-band phase difference between the coupled and through ports and the amplitude imbalance are less than 91 ◦ (cid:6) 0 : 5 ◦ and 0.75 dB, respectively. Comparisons and discussions are also implemented.","PeriodicalId":20579,"journal":{"name":"Progress in Electromagnetics Research Letters","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69003471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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