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Compact microwave multi-band band pass filters for 4/5G

We have designed dual-band bandpass filters using different methods and resonators, including using TE01δ mode quarter cylindrical dielectric resonators [1], coaxial stepped impedance resonators [2], and non-uniform pitch helical resonators [3]. These multi-band bandpass filters are compact compared to using several single-band bandpass filters. They have relatively large power handling capability so that they are applicable for transceivers of LTE/5G micro/pico-cell base stations.

Dual-band dielectric filter

Measured and simulated frequency response of designed dual-band dielectric filter‌

Dual-band coaxial filter

 ‌Measured and simulated frequency response of designed dual-band coaxial filter

Dual-band helical filter

Measured and Simulated frequency response of designed dual-band helical BPF‌

 Reference list

[1] Y. Wu, R. Gajaweera, and J. Everard, "Dual-band bandpass filter using TE01δ mode quarter cylindrical dielectric resonators," in 2016 Asia Pacific Microwave Conference (APMC), 2016.

[2] Y. Wu, R. Gajaweera, and J. Everard, "Dual-band bandpass filter using coaxial Stepped Impedance Resonators," in 2016 International Conference for Students on Applied Engineering (ICSAE), 2016, pp. 181-185.

[3] Y. Wu, R. Gajaweera, and J. Everard, "Dual-band bandpass filter using helical resonators," in 2016 46th European Microwave Conference (EuMC), 2016, pp. 237-240.