{"title":"A compact multilayer dual-mode substrate integrated circular cavity (SICC) filter","authors":"Zhigang Zhang, Yong Fan, Y. Cheng, Yonghong Zhang","doi":"10.2528/PIER11102904","DOIUrl":"https://doi.org/10.2528/PIER11102904","url":null,"abstract":"A novel high-performance millimeter-wave multilayer dual-mode filter is developed based on the substrate integrated waveguide circular cavity (SICC). The filter with two or three SIW circular cavities has been designed for Ka-band application. The multilayer dual mode filter has been firstly realized only by adjusting the coupling aperture located in input/output port and between layers. The position and size of coupling aperture can determine the coupling amount between two degenerate modes. This novel filter is very compact, and the simulated results prove it has the advantages of return loss, very low insertion loss, high selectivity, what's more it can be found that the upper side response of the filter are very steep.","PeriodicalId":448516,"journal":{"name":"2011 China-Japan Joint Microwave Conference","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131104572","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":"Measurement of complex permittivity for liquid materials using the open-ended cut-off waveguide reflection method","authors":"K. Shibata","doi":"10.1587/TRANSELE.E93.C.1621","DOIUrl":"https://doi.org/10.1587/TRANSELE.E93.C.1621","url":null,"abstract":"Various studies of specific absorption rates (SARs) using liquid phantoms imitating human body tissues have been widely carried out in electromagnetic compatibility (EMC) research fields. In order to establish accurate SARs for measurement, a faithful mockup of human body tissue is needed. Therefore, knowledge of the accurate measurement of sample materials with high permittivity and high loss is very important. In this study, the complex permittivity of tap water, ethanol, methanol and isopropanol is measured by the open-ended cut-off circular waveguide reflection method. The effectiveness of the method presented here of measuring a liquid phantom with high-permittivity and high-loss is also confirmed by comparing the measured results with the results obtained by the TM010 circular cavity resonator method. At this time, the effects on the input impedance under variations of the insertion length and termination conditions were studied. Then the complex permittivity of tap water, ethanol, methanol and isopropanol was measured at frequencies ranging from 0.5 to 3.0 GHz using the measurement procedure above. As a result, we confirmed the frequency characteristics of the complex permittivity for a wide variety of high-loss liquid materials.","PeriodicalId":448516,"journal":{"name":"2011 China-Japan Joint Microwave Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127994436","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}