{"title":"A compact dual-mode bandpass filter for GPS, Compass (Beidou) and GLONASS","authors":"S. Gao, H. Liu, J. Li, Wei Wu","doi":"10.1109/GSMM.2017.7970323","DOIUrl":null,"url":null,"abstract":"A dual-mode bandpass filter with compact size is proposed by using a new type of rotational symmetric dual-mode rectangular resonator. Due to the feed structure, two transmission zeros are generated near the lower and upper passbands to improve the skirt-selectivity of the filter. By adjusting the mutual coupling between the loading meander-line loop resonators, one transmission pole and neighboring transmission zero can be controlled. Two capacitors are added between each meander-line loop resonator and feedline to improve in-band performance. Based on this topology, a compact filter for GPS/Compass (BeiDou)/GLONASS applications has been designed, analyzed and fabricated. Measured results verified the validity of this design methodology. This proposed filter exhibits the small size of 0.11 λg×0.10 λg.","PeriodicalId":414423,"journal":{"name":"2017 10th Global Symposium on Millimeter-Waves","volume":"244 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 10th Global Symposium on Millimeter-Waves","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/GSMM.2017.7970323","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
A dual-mode bandpass filter with compact size is proposed by using a new type of rotational symmetric dual-mode rectangular resonator. Due to the feed structure, two transmission zeros are generated near the lower and upper passbands to improve the skirt-selectivity of the filter. By adjusting the mutual coupling between the loading meander-line loop resonators, one transmission pole and neighboring transmission zero can be controlled. Two capacitors are added between each meander-line loop resonator and feedline to improve in-band performance. Based on this topology, a compact filter for GPS/Compass (BeiDou)/GLONASS applications has been designed, analyzed and fabricated. Measured results verified the validity of this design methodology. This proposed filter exhibits the small size of 0.11 λg×0.10 λg.
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