NDLI: Tri-band filtering power divider based on multi-mode fork-type resonator for performance enhancement

Content Provider	IET Digital Library
Author	Zhang, Gang Zhang, Xinde Liu, Shicheng Tang, Liming Yang, Jiquan Hong, Jia Sheng
Abstract	A new microstrip tri-band filtering power divider (FPD) with favourable filtering and isolation performance based on the tri-mode fork-type resonator is presented in this study. By constructing the coupling scheme between the input transmission line and two pairs of symmetric fork-type resonators, a nice tri-passband filtering power division response can be easily achieved without an additional matching network. Meanwhile, the desired port-to-port isolation is attained by elaborately arranging two resistors between the symmetrical resonators with respect to the central input line. To demonstrate the authors’ design concept, one tri-band FPD prototype is implemented with good agreement between the simulation results of the electromagnetic simulation software and the measurement results of the vector network analyser. Results show that the new tri-band FPD exhibits sharp roll-off with five transmission zeros at passband edges, 17.1 dB harmonic suppression up to 4.6 GHz [2.35f 0 (f 0 = 1.95 GHz)], and better than 15.7 dB in-band isolation.
Starting Page	867
Ending Page	873
Page Count	7
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 9, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.0768
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-03-31
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Band-pass Filter Central Input Line Coupling Scheme Electromagnetic Simulation Software Frequency 1.95 GHz Frequency 2.35 GHz Harmonic Suppression Harmonics Suppression Input Transmission Line Isolation Performance Matching Network Microstrip Filter Microstrip Tri-band Filtering Power Divider Multimode Fork-type Resonator Nice Tri-passband Filtering Power Division Response Passband Edge Passive Filter Passive Network Performance Enhancement Port-to-port Isolation Power Divider Resonator Filter Symmetric Fork-type Resonator Symmetrical Resonator Transmission Zero Tri-band FPD Prototype Tri-mode Fork-type Resonator UHF Filter Vector Network Analyser Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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