@inbook{15c23f7d731a42238bbf89f9c2d00749,
title = "Compact 3D-Printed Bandpass Filters Using Coaxial and Dual-mode Ridged-Waveguide Resonators",
abstract = "This paper presents a new integration concept for 3D bandpass filters (BPFs) where coaxial resonators and dual-mode ridged waveguide resonators are combined within the same volume for miniaturization and RF performance enhancement. Size compactness is achieved by: i) two types of miniaturized resonators namely a coaxial and a dual-mode ridge waveguide resonator and ii) monolithic integration using stereolithography apparatus (SLA) 3D printing. A connectorized integration concept is also employed to facilitate the inter-connection with other SMA-probed RF devices. RF performance is enhanced through the combination of the two resonator types where the dual-mode resonator generates a transmission zero (TZ) close to the passband. A design process using coupled-resonator synthesis and eigenmode analysis is provided. The concept is experimentally validated at 4.9 GHz through the design, manufacturing, and testing of a BPF prototype with 3 dB fractional bandwidth of 7.3\%, in-band insertion loss of 0.31 dB and Qeff of 1210.",
keywords = "3D printing, bandpass filters (BPFs), coaxial filters, high-Q resonators, ridge-waveguide filters",
author = "Kunchen Zhao and Dimitra Psychogiou",
note = "Publisher Copyright: {\textcopyright} 2023 IEEE.; 2023 IEEE/MTT-S International Microwave Symposium, IMS 2023 ; Conference date: 11-06-2023 Through 16-06-2023",
year = "2023",
doi = "10.1109/IMS37964.2023.10187930",
language = "English",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "744--747",
booktitle = "2023 IEEE/MTT-S International Microwave Symposium, IMS 2023",
address = "United States",
}
