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- Title
A Large Frequency Ratio Dual-Band Integrated Bandpass Filter Based on MCSICL Structure.
- Authors
Zhu, Yu; Li, Xiaochun
- Abstract
In this paper, a dual-band integrated bandpass filter (DI-BPF) based on a mode composite substrate integrated coaxial line (MCSICL) is proposed for a large frequency ratio. The low-frequency bandpass filter is formed by incorporating an SICL line and a gap into the MCSICL, operating in the fundamental mode of the MCSICL. The high-frequency bandpass filter is formed by introducing grounded vias into the MCSICL, operating in the first high-order mode of the MCSICL. To guide the design, the equivalent circuit models of the low- and high-frequency bandpass filters are built. Based on the equivalent circuit models, the DI-BPF is synthesized for a large frequency ratio. The transitions from the DI-BPF to ground coplanar waveguides (GCPWs) are designed for the low- and high-frequency bandpass filters. The DI-BPF with the transitions is fabricated by the printed circuit board (PCB) process. Measurement results indicate a large frequency ratio of 23.16, with the isolation between the low- and high-frequency bandpass filters exceeding 30 dB from dc to 50 GHz.
- Subjects
COPLANAR waveguides; COAXIAL cables; BANDPASS filters; PRINTED circuits
- Publication
Electronics (2079-9292), 2024, Vol 13, Issue 4, p754
- ISSN
2079-9292
- Publication type
Article
- DOI
10.3390/electronics13040754