@inproceedings{7ea25feb96fc4d4d90f1ab8d527d14e8,
title = "RF-design of narrowband absorptive bandstop filters for UHF applications",
abstract = "This paper addresses the RF-design of absorptive bandstop filters (ABSFs) that feature narrow fractional bandwidth (FBW) and quality factors (Qs) of the order of a thousand. The aforementioned functionality is realized by means of a mixed implementation scheme in which one-port acoustic wave (AW) resonators and lumped-element impedance inverters are effectively combined in a compact geometry. The non-ideal effects - fabrication tolerances - of the utilized lumped-element components on the ABSF performance - theoretically infinite isolation and input reflection - are analyzed. A method to maintain the large stopband attenuation by adjusting the effective Q of each resonator with the aid of a tunable resistor is also reported. A filter prototype that makes use of commercially available surface acoustic wave (SAW) resonators and surface-mounted devices (SMDs) has been built and tested at 418 MHz for verification purposes. It exhibits a 0.02\% 3-dB FBW and a maximum stopband isolation of 62 dB.",
keywords = "Absorptive bandstop filter (ABSF), Bandstop filter, High quality-factor (Q) filter, Narrow bandwidth, Narrowband filter",
author = "Dimitra Psychogiou and Roberto Gomez-Garcia and Dimitrios Peroulis",
note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 2015 16th IEEE Annual Wireless and Microwave Technology Conference, WAMICON 2015 ; Conference date: 13-04-2015 Through 15-04-2015",
year = "2015",
month = jun,
day = "9",
doi = "10.1109/WAMICON.2015.7120362",
language = "English",
series = "2015 IEEE 16th Annual Wireless and Microwave Technology Conference, WAMICON 2015",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2015 IEEE 16th Annual Wireless and Microwave Technology Conference, WAMICON 2015",
address = "United States",
}