Hostname: page-component-8448b6f56d-mp689 Total loading time: 0 Render date: 2024-04-22T12:19:15.020Z Has data issue: false hasContentIssue false

A miniaturized tri-band bandpass microstrip filter using multiple resonators with sharp skirts

Published online by Cambridge University Press:  24 September 2020

Chenhao Wang
Affiliation:
Electronic Engineering Department, Xi'an University of Technology, Xi'an, China
Xiaoli Xi*
Affiliation:
Electronic Engineering Department, Xi'an University of Technology, Xi'an, China
Yuchen Zhao
Affiliation:
Electronic Engineering Department, Xi'an University of Technology, Xi'an, China
Xiaomin Shi
Affiliation:
Communication Engineering Department, Xi'an Shiyou University, Xi'an, China
*
Author for correspondence: Xiao-li Xi, E-mail: xixiaoli@xaut.edu.cn

Abstract

In this paper, a miniaturized tri-band bandpass microstrip filter using stub loaded rectangular ring resonator (SLRRR),shorted stub loaded stepped impedance resonators (SSLSIR), and stepped impedance resonators (SIR) with sharp skirts is presented. Two SSLSIRs are embedded paralleled inside SLRRR to generate a quasi-elliptic response at second and third passband. The odd-even fundamental resonant mode and first high-order resonant mode of the SIRs are exploited to generate tri-band response. Three bandwidths can be controlled independently due to different signal paths. Extra transmission zeros are introduced by the configuration of 0° feed structure. Sharp skirts are achieved at the upper edge of each passband by λg/4 lines which are loaded at the I/O ports. An example of the proposed tri-band filter operating at 2.76 GHz/5.7 GHz/7.63 GHz for TDD-LTE/WLAN/VSAT applications is implemented and fabricated. The simulation and measurement show a good agreement.

Type
Filters
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press in association with the European Microwave Association

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Wei, X, Wang, P, Gao, P, Xu, Z, Liao, J, Jin, L and Shi, Y (2014) Compact tri-band bandpass filter using open stub loaded tri-section λ g/4 stepped impedance resonator. IEEE Microwave and Wireless Components Letters 24, 512514.CrossRefGoogle Scholar
Jiang, W, Shen, W, Wang, T, Huang, Y, Peng, Y and Wang, G (2016) Compact dual-band filter using open/short stub loaded stepped impedance resonators (OSLSIRs/SSLSIRs). IEEE Microwave and Wireless Components Letters 26, 672674.CrossRefGoogle Scholar
Sachan, S and Chauhan, RK (2016) Tri Band BPF using Stub Loaded New Stepped Impedence Resonator, 2016 International Conference on Emerging Trends in Electrical Electronics & Sustainable Energy Systems (ICETEESES).Google Scholar
Xu, J (2016) Compact microstrip tri-band bandpass filter using new stubs loaded stepped-impedance resonator. IEEE Microwave and Wireless Components Letters 26, 249251.CrossRefGoogle Scholar
Lan, S, Weng, M, Chang, S, Hung, C and Liu, S (2015) A tri-band bandpass filter with wide stopband using asymmetric stub-loaded resonators. IEEE Microwave and Wireless Components Letters 25, 1921.CrossRefGoogle Scholar
Chen, JZ, Wang, N, He, Y and Liang, CH (2011) Fourth-order tri-band bandpass filter using square ring loaded resonators. Electronics Letters 47, 858859.CrossRefGoogle Scholar
Lai, X, Liang, CH, Di, H and Wu, B (2010) Design of Tri-Band Filter Based on Stub Loaded Resonator and DGS Resonator. IEEE Microwave and Wireless Components Letters 20, 265267.CrossRefGoogle Scholar
Zhang, XY, Xue, Q and Hu, BJ (2010) Planar tri-band bandpass filter with compact size. IEEE Microwave and Wireless Components Letters 20, 262264.CrossRefGoogle Scholar
Janković, N, Geschke, R and Bengin, VC (2013) Compact tri-band bandpass and bandstop filters based on Hilbert-Fork resonators. IEEE Microwave and Wireless Components Letters 23, 282284.CrossRefGoogle Scholar
Yu, B, Jia, BF, He, Y and Zhu, ZJ (2015) Compact tri-band bandpass filter with stub-loaded stepped-impedance resonator. Electronics Letters 51, 701703.CrossRefGoogle Scholar
Liu, S and Xu, J (2016) Compact tri-band bandpass filter using SISRLR. Electronics Letters 52, 15391541.CrossRefGoogle Scholar
Shen, GX, Che, WQ and Xue, Q (2017) Novel tri-band bandpass filter with independently controllable frequencies, bandwidths, and return losses. IEEE Microwave and Wireless Components Letters 27, 560562.CrossRefGoogle Scholar
Ai, J, Zhang, YH, Xu, KD, Shen, MK and Joines, WT (2017) Miniaturized frequency controllable band-stop filter using coupled-line stub-loaded shorted SIR for tri-band application. IEEE Microwave and Wireless Components Letters 27, 627629.CrossRefGoogle Scholar
AbdulRehman, M and Khalid, S (2018) Design of tri-band bandpass filter using symmetrical open stub loaded step impedance resonator. Electronics Letters 54, 11261128.Google Scholar
Xu, J, Wan, H, Ding, JQ and Zhu, YX (2019) Miniaturised tri-band lowpass-bandpass filter using lumped-element structure. Electronics Letters 55, 272274.CrossRefGoogle Scholar