Skip to main content Accessibility help

Quasi-elliptic dual-band bandpass filters based on series-cascaded multi-resonant cells

  • Andrea Ashley (a1), Dakotah J. Simpson (a1) and Dimitra Psychogiou (a1)


This paper reports on quasi-elliptic dual-band bandpass filters (BPFs) that were designed for the Filter Student Design Competition of the 2019 European Microwave Week. The proposed lumped-element (LE) BPF concept is based on two dual-band transversal cells and one multi-resonant cell that allow the realization of symmetric and asymmetric dual-band transfer functions shaped by six poles and five transmission zeros. A compact implementation scheme based on LE series resonators is proposed for size compactness and wide spurious free out-of-band response. For proof-of-concept demonstration purposes, a dual-band LE prototype with two passbands centered 1 and 1.5 GHz was designed, manufactured, and measured. It exhibited the following radio frequency measured performance characteristics. Passbands centered at 1.02 and 1.45 GHz, minimum insertion loss levels of 2.0 and 2.7 dB, and bandwidth of 146 and 105 MHz, respectively, for the first and the second passband, and out-of-band rejection >30 dB between 0 and 894 MHz, 1.17–1.34 GHz, and 1.72–6.9 GHz.


Corresponding author

Author for correspondence: Andrea Ashley, E-mail:


Hide All
1.Périgaud, A, Naeem, U, Bila, S, Tantot, O, Delhote, N, Verdeyme, S and Baillargeat, D (2016) A dual-mode dual-band bandpass cavity filter with widely separated passbands. 2016 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), Beijing, pp. 12.
2.Nocella, V, Pelliccia, L, Tomassoni, C and Sorrentino, R (2016) Miniaturized dual-band waveguide filter using TM dielectric-loaded dual-mode cavities. IEEE Microwave and Wireless Components Letters 26, 310312.
3.Bae, J and Nguyen, C (2013) New dual-band band-pass filter design with enhanced dual-band skirt characteristics. 2013 Asia-Pacific Microwave Conference Proceedings (APMC), Seoul, pp. 599901.
4.Liu, W and Tung, Y (2010) Dual-band stepped-impedance resonant filter with dual-band admittance inverter. 2010 International Conference on Microwave and Millimeter Wave Technology, Chengdu, pp. 14901493.
5.Lee, J and Lim, Y (2012) Design of a microstrip multi-band bandpass filters using the filter synthesis method. 2012 42nd European Microwave Conference, Amsterdam, pp. 463466.
6.Corrales, E, Menéndez, O, de Paco, P, Ramírez, M and Verdú, J (2010) Microstrip dual-band bandpass filter based on the cul-de-sac topology. The 40th European Microwave Conference, Paris, pp. 549552.
7.Zhou, Z, Ni, J and Hong, J (2016) Novel lossy microstrip filter with extracted-pole technique. 2016 46th European Microwave Conference (EuMC), London, pp. 120123.
8.Yeo, KSK and Lancaster, MJ (2001) The design of microstrip six-pole quasi-elliptic filter with linear phase response using extracted-pole technique. IEEE Transactions on Microwave Theory and Techniques 49, 321327.
9.Cho, Y, Baek, H, Lee, H and Yun, S (2009) A dual-band combline bandpass filter loaded by lumped series resonators. IEEE Microwave and Wireless Components Letters 19, 626628.
10.Xu, J, Wu, W and Wei, G (2016) Novel dual-band bandpass filter and reconfigurable filters using lumped-element dual-resonance resonators. IEEE Transactions on Microwave Theory and Techniques 64, 14961507.
11.Cho, Y, Jeon, I, Wang, X, Yun, S and Park, D (2011) Balanced dual-band bandpass filter using microstrip resonator loaded with lumped-elements,” Asia-Pacific Microwave Conference 2011, Melbourne, VIC, pp. 12861289.
12.Cheab, S, Wong, PW and Soeung, S (2018) Design of multi-band filters using parallel connected topology. Radioengineering 27, 186192.
13.Loeches-Sanchez, R, Psychogiou, D, Gomez-Garcia, R and Peroulis, D (2016) Application of capacitive-loading size-reduction techniques to multi-band and reconfigurable-bandwidth signal-interference planar bandpass filters. 2016 IEEE Radio and Wireless Symposium (RWS), Austin, TX, pp. 2022.
14.Gómez-García, R, Guyette, AC, Psychogiou, D, Naglich, EJ and Peroulis, D (2016) Quasi-elliptic multi-band filters with center-frequency and bandwidth tunability. IEEE Microwave and Wireless Components Letters 26, 192194.
15.Simpson, DJ, Gómez-García, R and Psychogiou, D (2019) Single-/Multi-band bandpass filters and duplexers with fully reconfigurable transfer-function characteristics. IEEE Transactions on Microwave Theory and Techniques 67, 18541869.
16.Psychogiou, D, Gómez-García, R and Peroulis, D (2017) Multi-resonant acoustic-wave-lumped-element resonators (AWLRs) for multi-band bandpass filters with enhanced fractional bandwidth. 2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), Tel-Aviv, pp. 14.
17.Gómez-García, R, Muñoz-Ferreras, J, Psychogiou, D, Addou, MA, Lintignat, J, Barelaud, B and Jarry, B (2017) Lumped-element RF analog multi-band bandpass filter concept for software-defined-radio architectures. 2017 15th IEEE International New Circuits and Systems Conference (NEWCAS), Strasbourg, pp. 101104.
18.Simpson, DJ, Gómez-García, R and Psychogiou, D (2018) UHF-band bandpass filters with fully-reconfigurable transfer function. 2018 International Applied Computational Electromagnetics Society Symposium (ACES), Denver, CO, pp. 12.
19.EuMW Filter Design Competition Specifications. Available at
20.Hong, JS (2011) Microstrip Filters for RF/Microwave Applications, 2nd Edn. Hoboken, NJ: Wiley.


Quasi-elliptic dual-band bandpass filters based on series-cascaded multi-resonant cells

  • Andrea Ashley (a1), Dakotah J. Simpson (a1) and Dimitra Psychogiou (a1)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed.