Design of new quadruplexer with compact size,high isolation and wide stopband |
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| Affiliation: | 1. Regional Centre of Advanced Technologies and Materials, Palacky University, Slechtitelu 11, 783 71 Olomouc, Czech Republic;2. Department of Nanobiotechnology, Institute of Nanobiology and Structural Biology of GCRC, Na Sadkach 7, 370 05 Ceske Budejovice, Czech Republic;1. School of Physics Science and Engineering, Tongji University, 200092 Shanghai, China;2. Shanghai Institute of Measurement and Testing Technology, National Center of Measurement and Testing for East China, National Center of Testing Technology, Zhangheng Road 1500, 201203 Shanghai, China;3. Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Science, 100190 Beijing, China;1. School of Physics and Engineering, Sun Yat-sen University, Guangzhou 510275, China;2. Rising Micro Electronics Co., Ltd., Guangzhou 510006, China;3. SYSU-CMU Shunde International Joint Research Institute, Foshan 528300, China;1. School of Management, Guangdong University of Technology, Guangzhou 510520, PR China;2. Katz Graduate School of Business, University of Pittsburgh, Pittsburgh, PA 15260, United States;1. State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Micro-System & Information Technology, Chinese Academy of Sciences, Changning Road 865, Shanghai 200050, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;3. Department of Electrical and Computer Engineering, University of Alabama in Huntsville, Huntsville, AL 35899, United States |
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| Abstract: | This study presents a quadruplexer (1.8/2.4/3.5/5.8 GHz) with compact size, high isolation, low insertion loss and wide stopband based on the multi-mode resonators. The quadruplexer is composed of four pairs of coupled multi-mode resonators (uniform impedance resonator, UIR and stepped impedance resonators, SIRs) and the source–load coupling lines. Each channel (passband) can be easily determined by tuning the impedance ratio (K) and length ratio (α) of the SIRs so as to implement a 2-order bandpass filter individually. The source–load coupling lines are designed to correspond to the quarter-wavelength of the center frequency at each channel. The proposed quadruplexer shows a simple configuration, an effective design method and a small circuit size. |
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| Keywords: | Quadruplexer Bandpass filter Stepped impedance resonator Source–load coupling lines |
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