A Wideband Bandpass Power Divider With Out-of-Band Multi-Transmission Zeros and Controllable Equal-Ripple Levels
- 7 October 2021
- journal article
- research article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Microwave Theory and Techniques
- Vol. 70 (2), 1178-1187
- https://doi.org/10.1109/tmtt.2021.3116072
Abstract
In this article, a novel wideband bandpass power divider (PD) with out-of-band multi-transmission zeros (TZs) is presented. It consists of $2M$ shunted short-circuited stubs (SCSs), ( $M + N$ ) cascaded coupled line sections, and ( $M + N - K_{N}$ ) isolation resistors. There are two types of topologies, and the number of TZs is solely determined by $N$ . Through even- and odd-mode analyses, general simultaneous equations for characteristic impedances, coupling strengths, and isolation resistors are derived with the proposed algorithm. By suitably selecting all the design parameters, all the $S$ -parameters ( $S_{11}$ , $S_{21} = S_{31}$ , $S_{22} = S_{33}$ , and $S_{32}$ ) of the proposed topology could provide an equal-ripple response with controllable ripple level in the passband. For a given fractional bandwidth (FBW), TZs and out-of-band rejection level can be designed independently. For further optimization, several isolation resistors can be omitted with the unchanged performances. For verification, two experimental circuits are fabricated and measured. Good agreement between the measured and simulated results is attained so as to successfully validate the correctness of the proposed design approach.Keywords
Funding Information
- National Natural Science Foundation of China (61701189, 61831011, 61833006)
- Project of the Education Department of Jilin Province (JJKH20211093KJ)
- Project on Industrial Innovation Capability of Jilin Province (2020C048)
- Interdisciplinary Integration and Innovation Project of Jilin University (JLUXKJC2020204)
- “the Fundamental Research Funds for the Central Universities.”
This publication has 36 references indexed in Scilit:
- Dual-Band Filtering Power Divider With High Selectivity and Good IsolationIEEE Microwave and Wireless Components Letters, 2016
- Reconfigurable Single/Multi-Band Filtering Power Divider Based on Quasi-Bandpass SectionsIEEE Microwave and Wireless Components Letters, 2016
- Design of compact wideband filtering power divider with extended isolation and rejection bandwidthElectronics Letters, 2016
- Novel Filtering Power Divider With Wide Stopband Using Discriminating CouplingIEEE Microwave and Wireless Components Letters, 2016
- Theory and Design of a Novel Wideband DC Isolated Wilkinson Power DividerIEEE Microwave and Wireless Components Letters, 2016
- Wideband Four-Way Filtering Power Divider With Sharp Selectivity and Wide Stopband Using Looped Coupled-Line StructuresIEEE Microwave and Wireless Components Letters, 2016
- A Design of 3-dB Wideband Microstrip Power Divider With an Ultra-Wide Isolated Frequency BandIEEE Transactions on Microwave Theory and Techniques, 2016
- Wideband filtering power divider with high selectivityElectronics Letters, 2015
- Extremely compact ultra‐wideband power divider using hybrid slotline/microstrip‐line transitionElectronics Letters, 2015
- Wideband Four-Way Filtering-Response Power Divider With Improved Output Isolation Based on Coupled LinesIEEE Microwave and Wireless Components Letters, 2014