A Quad-Channel Diplexer Using Stub-Loaded Step Impedance Resonators
A quad-channel diplexer is designed in this paper. The diplexer is composed of four stub-loaded step impedance resonators and a common feeder T-joint, which realizes four passbands with center frequencies of 2.6 GHz, 3.48 GHz, 4.8 GHz, and 6.3 GHz. The dual-band filter can be formed by coupling the stepped impedance resonator with the stub load, so two dual-band filters with good performance can be constructed. At the input and output end, a 0-degree feed is used to generate transmission zeros, which improves the high selectivity. When two dual-band filters are combined, a good impedance matching is obtained, and the |S<sub>23</sub>| > 20 dB between the two dual-band filters achieves good isolation. The simulation results are consistent with the measured results.
Authors
- Zhenheng Lin
- Liqin Liu (ORCID: https://orcid.org/0000-0001-7158-6772)
- Ru‐Yuan Yang (ORCID: https://orcid.org/0000-0002-3364-3753)
- Min‐Hang Weng (ORCID: https://orcid.org/0000-0001-8342-8894)
- Qun Chen (ORCID: https://orcid.org/0000-0002-3600-9790)
- Li Zhang (ORCID: https://orcid.org/0000-0002-3051-9386)
Institutions
- National Pingtung University of Science and Technology (TW)
- Putian University (CN)
Publication Details
- Journal
- Micromachines
- Published
- 2025-08-31
- DOI
- https://doi.org/10.3390/mi16091012
- Primary Topic
- Microwave Engineering and Waveguides
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Natural Science Foundation of Fujian Province