Frequency-Tunable Absorptive Bandpass Filter Using Substrate-Integrated Waveguide Structure
- Authors
- Jeong, Seong-Wook; Lee, Gyuwon; Lee, Jongheun; Lee, Juseop
- Issue Date
- 12월-2021
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Absorptive filter; Admittance; Inverters; Prototypes; Resistors; Resonant frequency; Resonators; Substrates; frequency-tunable filter; nonplanar filter; substrate-integrated waveguide (SIW) resonator
- Citation
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.69, no.12, pp.5351 - 5359
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
- Volume
- 69
- Number
- 12
- Start Page
- 5351
- End Page
- 5359
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/140200
- DOI
- 10.1109/TMTT.2021.3119661
- ISSN
- 0018-9480
- Abstract
- This work, for the first time, presents an absorptive frequency-tunable substrate-integrated waveguide (SIW) filter. For the filter design, an absorptive bandpass filter prototype tailored to an SIW structure has been formulated. The proposed absorptive bandpass filter prototype is capable of having a return loss larger than 20 dB at all frequencies although it has a simple matching circuit. The filter prototype has been attained by comprehensive formula-based synthesis of a new matching circuit equivalent to an existing one. To validate our filter prototype, a second-order absorptive bandpass filter that can alter its center frequency has been designed, fabricated, and measured. This article demonstrates approaches to find physical dimensions by comparing each section of the filter structure with the corresponding part of the prototype. The fabricated absorptive bandpass filter has a compact structure by virtue of its simple matching section. The frequency-tunable SIW resonators allow our absorptive bandpass filter to adjust its center frequency from 1.76 to 2.69 GHz while having absorptive performance. The measured reflection of the filter centered at 2.50 GHz is smaller than -10 dB between 1.56 and 3.27 GHz (2.10:1). It is shown that theory, simulation results, and measured responses are in good agreement.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Computer Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.