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- Title
LTCC FOLD-BACK BANDPASS FILTER DESIGNED WITH CAPACITIVELY LOADED STUBS.
- Authors
Chin, K.-S.; Hung, J.-L.; Huang, C.-W.; Huang, S.-P.; Kao, Y.-A.; Chao, S.-H.
- Abstract
This study presents a design of a compact stub-type bandpass filter with capacitively loaded stubs and a fold-back structure. This paper employed the fabrication process of low-temperature co-fired ceramic (LTCC) for filter realization of a multi-layer structure. The proposed filter structure required adding end capacitors to stubs to extend their electrical length, while achieving a length reduction of 30%. This study provided design curves to determine the dimensions of the end capacitor for reaching maximum electrical length extension. In addition, a fold-back configuration was applied to halve the filter size. An experimental filter operating at 5.8 GHz was fabricated and measured to validate the design concept, achieving a highly compact size of 14.3 x 8.2 x 0.76mm³.
- Subjects
ELECTRIC equipment; LOW Temperature Cofired Ceramic technology; BANDPASS filters; ELECTRIC capacity; DIELECTRIC devices
- Publication
Progress in Electromagnetics Research C, 2011, Vol 23, p95
- ISSN
1937-8718
- Publication type
Article
- DOI
10.2528/pierc11062704