Pub Date : 2007-10-31DOI: 10.5515/KJKIEES.2007.18.10.1126
S. Myoung, Young-Pyo Hong, Yongshik Lee, J. Yook, Byoung-Jun Jang
This paper presents a varactor-tuned miniaturized hairpin tunable filter employing single control voltage. The proposed tunable filter is designed and fabricated with the constant ratio rule in which the capacitances of the each stage maintains a constant ratio without any dependency on the miniaturized electrical length. As a result, the filter can be tuned with the reserved equivalent condition using a single control voltage. To show the validity of the proposed method, a third-order 0.5 dB ripple Chebyshev filter with a center frequency of 900 MHz and a fractional bandwidth(FBW) of 10% was designed and fabricated. The measured center frequency of the fabricated filter is changed from 606 MHz to 944 MHz, 338 MHz with the single control voltage from 0.5 V to 4 V. Expect of slight change of the bandwidth, the measured filter characteristics are well reserved with the various control voltage.
{"title":"Miniaturized Hairpin Tunable Filter with the Single Control Voltage","authors":"S. Myoung, Young-Pyo Hong, Yongshik Lee, J. Yook, Byoung-Jun Jang","doi":"10.5515/KJKIEES.2007.18.10.1126","DOIUrl":"https://doi.org/10.5515/KJKIEES.2007.18.10.1126","url":null,"abstract":"This paper presents a varactor-tuned miniaturized hairpin tunable filter employing single control voltage. The proposed tunable filter is designed and fabricated with the constant ratio rule in which the capacitances of the each stage maintains a constant ratio without any dependency on the miniaturized electrical length. As a result, the filter can be tuned with the reserved equivalent condition using a single control voltage. To show the validity of the proposed method, a third-order 0.5 dB ripple Chebyshev filter with a center frequency of 900 MHz and a fractional bandwidth(FBW) of 10% was designed and fabricated. The measured center frequency of the fabricated filter is changed from 606 MHz to 944 MHz, 338 MHz with the single control voltage from 0.5 V to 4 V. Expect of slight change of the bandwidth, the measured filter characteristics are well reserved with the various control voltage.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657760","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}
Pub Date : 1900-01-01DOI: 10.1109/IMWS.2008.4782307
Jian-Peng Wang, J. Ni, Yong-xin Guo, D. Fang
A microstrip Wilkinson power divider with harmonic suppression and size reduction is presented in this paper. The proposed power divider has reduced its occupied area to 37.6% of the conventional design. Furthermore higher order harmonics are effectively suppressed. The whole design is validated by the full-wave electromagnetic simulation results.
{"title":"Miniaturized Microstrip Wilkinson Power Divider with Harmonic Suppression","authors":"Jian-Peng Wang, J. Ni, Yong-xin Guo, D. Fang","doi":"10.1109/IMWS.2008.4782307","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782307","url":null,"abstract":"A microstrip Wilkinson power divider with harmonic suppression and size reduction is presented in this paper. The proposed power divider has reduced its occupied area to 37.6% of the conventional design. Furthermore higher order harmonics are effectively suppressed. The whole design is validated by the full-wave electromagnetic simulation results.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121351097","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}
Pub Date : 1900-01-01DOI: 10.1109/IMWS.2008.4782259
A. Gorur, C. Karpuz, G. Eryilmaz, T. Tumer
We report the results of an investigation into dual-mode operation of microstrip loop resonator based on meander slow wave structure, and its applications for designing miniature dual-mode bandpass filters. A new feed arrangement for the miniature dual-mode filters is also proposed and investigated in detail. The feed arrangement supports the proposed enhanced coupling between I/O ports of the filter. Both calculated and measured results for two-pole and four-pole dual-mode filters are presented.
{"title":"Miniature Dual-Mode Microstrip Bandpass Filters with Enhanced Parasitic Coupling","authors":"A. Gorur, C. Karpuz, G. Eryilmaz, T. Tumer","doi":"10.1109/IMWS.2008.4782259","DOIUrl":"https://doi.org/10.1109/IMWS.2008.4782259","url":null,"abstract":"We report the results of an investigation into dual-mode operation of microstrip loop resonator based on meander slow wave structure, and its applications for designing miniature dual-mode bandpass filters. A new feed arrangement for the miniature dual-mode filters is also proposed and investigated in detail. The feed arrangement supports the proposed enhanced coupling between I/O ports of the filter. Both calculated and measured results for two-pole and four-pole dual-mode filters are presented.","PeriodicalId":257679,"journal":{"name":"2008 IEEE MTT-S International Microwave Workshop Series on Art of Miniaturizing RF and Microwave Passive Components","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121657222","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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