A Unified Review of Bandpass Filter Technologies for 5G: Challenges, Trends, and Metamaterial Solutions

International Journal of Electronics and Communication Engineering

© 2025 by SSRG - IJECE Journal

Volume 12 Issue 7

Year of Publication : 2025

Authors : Gauravkumar R. Asari, Priti J. Muliya, Urvisha N. Fatak, Shreeji H. Shah, Ami B. Gandhi

10.14445/23488549/IJECE-V12I7P109

How to Cite?

Gauravkumar R. Asari, Priti J. Muliya, Urvisha N. Fatak, Shreeji H. Shah, Ami B. Gandhi, "A Unified Review of Bandpass Filter Technologies for 5G: Challenges, Trends, and Metamaterial Solutions," SSRG International Journal of Electronics and Communication Engineering, vol. 12,  no. 7, pp. 102-118, 2025. Crossref, https://doi.org/10.14445/23488549/IJECE-V12I7P109

Abstract:

This review paper presents a detailed exploration of the advancements in Bandpass Filter (BPF) technologies tailored for 5G wireless communication. With the increasing demand for high data rates, spectral efficiency, and miniaturized hardware, the role of compact and high-performance filters has become critical. The study surveys a wide spectrum of BPF design methodologies, ranging from classical approaches such as lumped element, SAW/BAW, cavity, and planar resonator filters to more recent innovations grounded in metamaterial concepts, including Split Ring Resonators (SRRs) and Complementary Split Ring Resonators (CSRRs). Through a comparative analysis of key performance metrics such as insertion loss, return loss, bandwidth, and form factor, the paper identifies the capabilities and trade-offs inherent in each design approach. Special attention is given to the potential of metamaterial-inspired filters to address the limitations of conventional designs, particularly for sub-6 GHz and mm-wave 5G applications. The review also outlines persistent challenges in the field, such as bandwidth enhancement, integration complexity, and fabrication constraints. It provides future research directions for the development of next-generation reconfigurable and high-selectivity BPFs.

Keywords:

Bandpass Filter, Split Ring Resonator, Complementary Split Ring Resonator, S Parameters.

References:

[1] Ameer Basheer et al., “Design of Bandpass Filter for 5G Applications with High-selectivity and Wide Band Rejection,” 2022 Muthanna International Conference on Engineering Science and Technology, Samawah, Iraq, pp. 179-183, 2022.
[CrossRef] [Google Scholar] [Publisher Link]
[2] Monica Martinez-Mendoza et al., “Design of a Triband Lumped Element Filter for Digital Microwave Power Amplifiers,” 2015 European Microwave Conference (EuMC), Paris, France, pp. 805-808, 2015.
[CrossRef] [Google Scholar] [Publisher Link]
[3] Matthew A. Morgan, and Tod A. Boyd, “Theoretical and Experimental Study of a New Class of Reflectionless Filter,” IEEE Transactions on Microwave Theory and Techniques, vol. 59, no. 5, pp. 1214-1221, 2011.
[CrossRef] [Google Scholar] [Publisher Link]
[4] Muhammad Ali et al., “Miniaturized High-Performance Filters for 5G Small-Cell Applications,” 2018 IEEE 68th Electronic Components and Technology Conference, San Diego, CA, USA, pp. 1068-1075, 2018.
[CrossRef] [Google Scholar] [Publisher Link]
[5] Muhammad Ali et al., “First Demonstration of Compact, Ultra-Thin Low-Pass and Bandpass Filters for 5G Small-Cell Applications,” IEEE Microwave and Wireless Components Letters, vol. 28, no. 12, pp. 1110-1112, 2018.
[CrossRef] [Google Scholar] [Publisher Link]
[6] Bahram Yassini, Ming Yu, and Brian Keats, “A Ka -Band Fully Tunable Cavity Filter,” IEEE Transactions on Microwave Theory and Techniques, vol. 60, no. 12, pp. 4002-4012, 2012.
[CrossRef] [Google Scholar] [Publisher Link]
[7] Bahram Yassini, and Ming Yu, “A Novel ka Band Dual Mode Super Q Cavity Filter,” 2014 IEEE MTT-S International Microwave Symposium (IMS2014), Tampa, FL, USA, pp. 1-3, 2014.
[CrossRef] [Google Scholar] [Publisher Link]
[8] Bahram Yassini, and Ming Yu, “Ka-Band Dual-Mode Super Q Filters and Multiplexers,” IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 10, pp. 3391-3397, 2015.
[CrossRef] [Google Scholar] [Publisher Link]
[9] Hai Hu, Ke-Li Wu, and Richard J. Cameron, “Stepped Circular Waveguide Dual-Mode Filters for Broadband Contiguous Multiplexers,” IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 1, pp. 139-145, 2012.
[CrossRef] [Google Scholar] [Publisher Link]
[10] Trong-Hieu Le et al., “A Novel Diplexer Integrated With a Shielding Case Using High Q -Factor Hybrid Resonator Bandpass Filters,” IEEE Microwave and Wireless Components Letters, vol. 28, no. 3, pp. 215-217, 2018.
[CrossRef] [Google Scholar] [Publisher Link]
[11] Michal Baranowski et al., “The Design of Cavity Resonators and Microwave Filters Applying Shape Deformation Techniques,” IEEE Transactions on Microwave Theory and Techniques, vol. 71, no. 7, pp. 3065-3074, 2023.
[CrossRef] [Google Scholar] [Publisher Link]
[12] Hualei Wang et al., “Design of Ladder-Type SAW/BAW Filters with Constant Group Delay,” 2011 IEEE International Ultrasonics Symposium, Orlando, FL, USA, pp. 345-348, 2011.
[CrossRef] [Google Scholar] [Publisher Link]
[13] Dimitra Psychogiou, Roberto Gómez-García, and Dimitrios Peroulis, “SAW-Based Bandpass Filters with Flat in-Band Group Delay and Enhanced Fractional Bandwidth,” 2017 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, Pavia, Italy, pp. 1-3, 2017.
[CrossRef] [Google Scholar] [Publisher Link]
[14] Xian-Hu Zha et al., “Surface and Bulk Acoustic Wave Resonators Based on Aluminum Nitride for Bandpass Filters,” AAPPS Bulletin, vol. 34, pp. 1-15, 2024.
[CrossRef] [Google Scholar] [Publisher Link]
[15] Pu Chen, Guangxi Li, and Zhiyuan Zhu, “Development and Application of SAW Filter,” Micromachines, vol. 13, no. 5, pp. 1-15, 2022.
[CrossRef] [Google Scholar] [Publisher Link]
[16] Yasir I. A. Al-Yasir et al., “Recent Progress in the Design of 4G/5G Reconfigurable Filters,” Electronics, vol. 8, no. 1, pp. 1-17, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[17] Kai Yang et al., “Advanced RF Filters for Wireless Communications,” Chip, vol. 2, no. 4, pp. 1-26, 2023.
[CrossRef] [Google Scholar] [Publisher Link]
[18] Gabriel Giribaldi et al., “Compact and Wideband Nanoacoustic Pass-Band Filters for Future 5G and 6G Cellular Radios,” Nature Communications, vol. 15, no. 1, pp. 1-13, 2024.
[CrossRef] [Google Scholar] [Publisher Link]
[19] Longfang Ye et al., “Substrate Integrated Plasmonic Waveguide for Microwave Bandpass Filter Applications,” IEEE Access, vol. 7, pp. 75957-75964, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[20] Yuxuan Luo et al., “A Compact Microwave Bandpass Filter Based on Spoof Surface Plasmon Polariton and Substrate Integrated Plasmonic Waveguide Structures,” Applied Physics A, vol. 128, 2022.
[CrossRef] [Google Scholar] [Publisher Link]
[21] Gaurav Mittal, and Nagendra Prasad Pathak, “Spoof Surface Plasmon Polaritons Based Microwave Bandpass Filter,” Microwave and Optical Technology Letters, vol. 63, no. 1, pp. 51-57, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[22] Asad Aziz, “A Novel Plasmonic Waveguide for Extraordinary Field Enhancement of Spoof Surface Plasmon Polaritons with Low-Loss Feature,” Results in Optics, vol. 5, pp. 1-9, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[23] Chih-Jung Chen, “Design of Parallel-Coupled Dual-Mode Resonator Bandpass Filters,” IEEE Transactions on Components, Packaging and Manufacturing Technology, vol. 6, no. 10, pp. 1542-1548, 2016.
[CrossRef] [Google Scholar] [Publisher Link]
[24] Faroq Razzaz, Saud M. Saeed, and Majeed A.S. Alkanhal, “Ultra-Wideband Bandpass Filters Using Tapered Resonators,” Applied Sciences, vol. 12, no. 7, pp. 1-12, 2022.
[CrossRef] [Google Scholar] [Publisher Link]
[25] Li Yang et al., “Novel Multilayered Ultra-Broadband Bandpass Filters on High-Impedance Slotline Resonators,” IEEE Transactions on Microwave Theory and Techniques, vol. 67, no. 1, pp. 129-139, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[26] A.J. Salim et al., “A Polygonal Open-Loop Resonator Compact Bandpass Filter for Bluetooth and WLAN Applications,” IOP Conference Series: Materials Science and Engineering, vol. 433, no. 1, pp. 1-9, 2018.
[CrossRef] [Google Scholar] [Publisher Link]
[27] Fatima Kiouach, Bilal Aghoutane, and Mohammed El Ghzaoui, “Novel Microstrip Bandpass Filter for 5G mm-Wave Wireless Communications,” e-Prime - Advances in Electrical Engineering, Electronics and Energy, vol. 6, pp. 1-6, 2023.
[CrossRef] [Google Scholar] [Publisher Link]
[28] Amjad Altaf et al., “Design of Millimeter-Wave Microstrip BPF Using Dual-Mode Ring Resonator and Folded Half-Wavelength Resonators,” 2020 17th International Bhurban Conference on Applied Sciences and Technology, Islamabad, Pakistan, pp. 653-657, 2020.
[CrossRef] [Google Scholar] [Publisher Link]
[29] Zahid A. Bhat et al., “Compact and Novel Coupled Line Microstrip Bandpass Filter Based on Stepped Impedance Resonators for Millimetre-Wave Communications,” Frequenz, vol. 75, no. 5-6, pp. 147-152, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[30] F. Parment et al., “Ka-Band Compact and High-Performance Bandpass Filter Based on Multilayer Air-Filled SIW,” Electronics Letters, vol. 53, no. 7, pp. 486-488, 2017.
[CrossRef] [Google Scholar] [Publisher Link]
[31] Jian Li et al., “38‐GHz SIW Filter Based on the Stepped‐Impedance Face‐to‐Face E‐Shaped DGSs for 5G Application,” Microwave and Optical Technology Letters, vol. 61, no. 6, pp. 1500-1504, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[32] Songyuan Yang et al., “Substrate Integrated Waveguide Filter Based on Novel Coupling-Enhanced Semicircle Slots for 5G Applications,” IEICE Electronics Express, vol. 16, no. 8, pp. 1-4, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[33] Zahid A. Bhat et al., “A Compact and Reconfigurable Dual-Mode Configuration Substrate Integrated Waveguide Dual-Band Bandpass Filter for 5G and Millimeter-Wave Communications,” Progress in Electromagnetics Research Letters, vol. 99, pp. 93-101, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[34] Guangxu Shen et al., “Ultra-Low-Loss Millimeter-Wave LTCC Bandpass Filters Based on Flexible Design of Lumped and Distributed Circuits,” IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 68, no. 4, pp. 1123-1127, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[35] Yu-Chen Lin et al., “Millimeter-Wave Bandpass Filter on Printed Circuit Board with Conventional Microstrip Line Structure,” 2021 International Symposium on Antennas and Propagation, Taipei, Taiwan, pp. 1-2, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[36] Parthasarathy Ramanujam et al., “Design of Compact Highpass Filter for 5G mm-wave Applications Using Complementary Split Ring Resonator,” Frequenz, vol. 74, no. 5-6, pp. 177-181, 2020.
[CrossRef] [Google Scholar] [Publisher Link]
[37] Mohamad Syahral, and Achmad Munir, “Development of Multiple Elements of SRR-Based Bandpass Filter,” 2016 10th International Conference on Telecommunication Systems Services and Applications, Denpasar, Indonesia, pp. 1-4, 2017.
[CrossRef] [Google Scholar] [Publisher Link]
[38] Zaid A. Abdul Hassain, Amer Abbood AL-Behadili, and Adham R. Azeez, “First Order Parallel Coupled BPF with Wideband Rejection Based on SRR and CSRR,” Telkomnika (Telecommunication Computing Electronics and Control), vol. 17, no. 6, pp. 2704-2712, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[39] Ria Lovina Defitri, and Achmad Munir, “X-Band Microstrip Narrowband BPF Composed of Split Ring Resonator,” 2016 Progress in Electromagnetic Research Symposium, Shanghai, China, pp. 3468-3471, 2016.
[CrossRef] [Google Scholar] [Publisher Link]
[40] Mohammed Berka et al., “Dual-Band Bandpass Filter Based on Electromagnetic Coupling of Twin Square Metamaterial Resonators (SRRs) and Complementary Resonator (CSRR) for Wireless Communications,” Journal of Electronic Materials, vol. 50, pp. 4887-4895, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[41] Zenal Aripin et al., “Compact SRR-Based Microstrip BPF for Wireless Communication,” 2015 2nd International Conference on Information Technology, Computer, and Electrical Engineering, Semarang, Indonesia, pp. 474-477, 2015.
[CrossRef] [Google Scholar] [Publisher Link]
[42] Mohamed Hesham, and Sameh O. Abdellatif, “Compact Bandpass Filter Based on Split Ring Resonators,” 2019 International Conference on Innovative Trends in Computer Engineering, Aswan, Egypt, pp. 301-303, 2019.
[CrossRef] [Google Scholar] [Publisher Link]
[43] Chi-Hyung Ahn, Dong-Jin Jung, and Kai Chang, “Compact Parallel‐Coupled Line Bandpass Filter Using Double Complementary Split Ring Resonators,” Microwave and Optical Technology Letters, vol. 55, no. 3, pp. 506-509, 2013.
[CrossRef] [Google Scholar] [Publisher Link]
[44] Monish Gupta, and Jyoti Saxena, “Microstrip Filter Designing by SRR Metamaterial,” Wireless Personal Communications, vol. 71, pp. 3011-3022, 2013.
[CrossRef] [Google Scholar] [Publisher Link]
[45] K.V. Vineetha, M. Siva Kumar, and B.T.P. Madhav, “Analysis of Triple Band Split Ring Resonator Based Microstrip Bandpass Filter,” Journal of Physics: Conference Series, vol. 1804, no. 1, pp. 1-6, 2021.
[CrossRef] [Google Scholar] [Publisher Link]
[46] Jonathan Carver, Vianney Reignault, and Frédérique Gadot, “Engineering of the Metamaterial-Based Cut-Band Filter,” Applied Physics A, vol. 117, pp. 513-516, 2014.
[CrossRef] [Google Scholar] [Publisher Link]