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Abstract
A super-compact ultra-wideband (UWB) microstrip band-pass filter (BPF) with triple-notched bands and wide stopband is proposed in this paper. The super-compactness of the proposed filter is achieved by integrating the modified SCRLH-TL UWB-BPF and backbone-shaped defected ground structure (DGS). The equivalent LC circuit models of the DGS and the modified SCRLH-TL UWB-BPF with the DGS are analyzed to validate their numerical simulation results. To introduce the triple notched-bands to mitigate the interference the two triple-mode SIRs are designed and loaded on the modified UWB-BPF without increasing the circuit size. The proposed filter was fabricated by using a conventional PCB process with the substrate of FR4. The measured 3-dB passband ranges from 2.8 through 10.2 GHz with the fractional bandwidth (FBW) of about 114%. The triple-notched bands with attenuation of more than 15 dB are measured at 4.4, 5.3 and 8.2 GHz, respectively. The filter exhibits a high selectivity with steep skirt property and has a wide upper stopband with an out-of-band rejection of −10 dB at 11.8−20 GHz. Its total dimension, including the rectangular substrate with feed lines, occupies only 16mm × 8 mm.
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No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Ling Wang
Ling Wang received the B.Eng. and M.Eng. degrees from Changjiang University, Jingzhou, Hubei, China, in 1997 and 2000, respectively, and the Ph.D. degree from the Beijing Institute of Technology, Beijing, in 2004. Since July 2005, she has been an instructor with the Information and Communication Engineering Institution, Communication University of China, Beijing, where she was an associate professor in 2011. She has authored or coauthored over 10 international journal articles and conference papers. Her current research interests include the electromagnetic metamaterials, bandpass microwave filter components, electromagnetic compatibility (EMC), and signal integrity (SI).
Shuhui Yang
Shuhui Yang (Member, IEEE) received a B.Sc. degree from Zhejiang University, Hangzhou, China, in 1994, an M.Sc. degree from the Communication University of China, Beijing, China, in 2000, and the Ph.D. degree from the Institute of Microelectronics of the Chinese Academy of Sciences, Beijing, in 2003. From 2003 to 2015, he was a professor at Beijing Information Science and Technology University, Beijing. In 2008, he was a visiting scholar and an adjunct associate professor with the University of South Carolina (USC), Columbia, SC, USA. In 2011, he joined Victoria University, Melbourne, VIC, Australia, as a visiting scholar. From 2013 to 2014, he was a visiting professor with USC. In 2015, he joined the Communication University of China and is currently a professor and the Chairperson of the Department of Communication Engineering. His current research interests include the electromagnetic metamaterials, passive microwave components, electromagnetic compatibility (EMC), and signal integrity (SI).
Qingxin Guo
Qingxin Guo received B.S., M.S., and Ph.D. degrees in electromagnetic field and microwave technology from the Communication University of China, Beijing, China, in 1997, 2006, and 2013, respectively. From 1997 to 2002, he was an engineer with Xiamen Overseas Chinese Electronics Company, Ltd., Xiamen, China, where he was involved with the repeaters and the mobile phone for the GSM system. From 2002 to 2004, he was a project manager of Beijing Gigamega Electronics Company, Ltd., Beijing, where he was responsible for the design of amplifier for transmitter. From 2004 to 2008, he was an engineer and a project manager of Beijing Filcom Technology Company, Ltd., Beijing, where he was responsible for the design of combiner and multiplexer. From 2011 to 2012, he was a visiting researcher with the Electromagnetic Communication Laboratory (EMC lab), Electrical Engineering Department, Pennsylvania State University, State College, PA, USA. He is currently a professor with the School of Information Engineering, Communication University of China, Beijing, China. His research interests include metasurfaces, antennas, microwave passive components, and RF circuits.
Bin Li
Bin Li received a bachelor's degree in telecommunication engineering from Northern Jiaotong University, Beijing, China, in 2001, and a Ph.D. degree in optical fiber telecommunications from the Institute of Lightwave Technology, Beijing Jiaotong University, Beijing, in 2007. Since 2008, she has been a lecturer with the Information Engineering School, Communication University of China, Beijing. Her current research interests include optical fiber communication, millimeter-wave devices, and terahertz components.
Li Zhang
Li Zhang received the B.Eng., M.Eng., and Ph.D. degrees from the Communication University of China, Beijing, China, in 2000, 2003, and 2017, respectively. In July 2003, she joined the Communication University of China and is currently an associate professor. Her current research interests are microwave circuits, electromagnetic compatibility (EMC), and optimization algorithms in electromagnetic simulations.