{"title":"Miniaturized Intermediate-Frequency Filter for BeiDou Navigation Satellite System","authors":"Qian Kewei, Tian Miao","doi":"10.1002/mop.70106","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>A new type of intermediate-frequency (IF) filter based on LTCC multilayer technology for BeiDou navigation satellite system is presented in this letter. By reasonably selecting the equivalent circuit value of each passive component, and separating the effective area of each inductance and capacitance to reduce the influence of parasitic coupling, an IF bandpass filter with a center frequency of only 46 MHz can be realized in a ceramic surface mount package. Besides, the locations of the transmission zeros can be tuned individually by changing the LC value of each resonant cell, thus a deep suppression level and wide stopband could be obtained simultaneously. The IF filter has a compact size of 10 mm × 6 mm × 2 mm, which is very suitable for the portable BeiDou B3 system.</p>\n </div>","PeriodicalId":18562,"journal":{"name":"Microwave and Optical Technology Letters","volume":"67 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Microwave and Optical Technology Letters","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mop.70106","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Miniaturized Intermediate-Frequency Filter for BeiDou Navigation Satellite System
A new type of intermediate-frequency (IF) filter based on LTCC multilayer technology for BeiDou navigation satellite system is presented in this letter. By reasonably selecting the equivalent circuit value of each passive component, and separating the effective area of each inductance and capacitance to reduce the influence of parasitic coupling, an IF bandpass filter with a center frequency of only 46 MHz can be realized in a ceramic surface mount package. Besides, the locations of the transmission zeros can be tuned individually by changing the LC value of each resonant cell, thus a deep suppression level and wide stopband could be obtained simultaneously. The IF filter has a compact size of 10 mm × 6 mm × 2 mm, which is very suitable for the portable BeiDou B3 system.
期刊介绍：
Microwave and Optical Technology Letters provides quick publication (3 to 6 month turnaround) of the most recent findings and achievements in high frequency technology, from RF to optical spectrum. The journal publishes original short papers and letters on theoretical, applied, and system results in the following areas.
- RF, Microwave, and Millimeter Waves
- Antennas and Propagation
- Submillimeter-Wave and Infrared Technology
- Optical Engineering
All papers are subject to peer review before publication
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