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- Title
Design of miniaturized substrate integrated coaxial line bandpass filters with quarter-wavelength spiral resonator.
- Authors
Lu, Yun‐Long; Dai, Gao‐Le; Hua, Changzhou; Xu, Gaoming; Li, Kai
- Abstract
ABSTRACT In this article, several miniaturized bandpass filters (BPFs) with substrate integrated coaxial line quarter-wavelength spiral resonators were proposed. The coupling coefficients and external quality factors of proposed structures were examined by using the commercial simulation software. With different combinations of the proposed resonators, three two-order and two high-order miniaturized BPFs operating at 1.2 GHz with 3-dB fractional bandwidth of 8% were designed, fabricated, and measured. The measured results showed that all the return losses were better than 10 dB over the entirely passbands, and the overall circuit sizes of two-order and high-order BPFs were only 0.044 λ0 × 0.028 λ0 and 0.047 λ0 × 0.047 λ0, where λ0 is the wavelength in free space at the center frequency of the passband. Good agreements were observed between the simulated and measured results. © 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 26:489-495, 2016.
- Subjects
MINIATURE electronic equipment; COAXIAL cables; BANDPASS filter design &; construction; WAVELENGTHS; ELECTRIC resonators; COMPUTER-aided engineering
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2016, Vol 26, Issue 6, p489
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.20994