@inproceedings{c81919c780094b7693cd8c1791cb9531,
title = "Tunable RF bandpass filter for interference suppression in software defined radios",
abstract = "Tunable filter is highly required in next generation wireless communications. This paper presents a bandpass tunable filter based on digital FIR filter concept. The essential idea of the proposed filter behavior leverages on a delay and combining structure, which exhibits periodical passband and stopband in terms of frequency while the higher order passband is used to achieve a bandpass filter. The filter characteristics are determined by the delay length and combining coefficient and additional phase shifters are introduced to tune the center frequency of the passband. The filter can achieve broad frequency tuning range with keep constant passband bandwidth. This work analyzes the proposed idea in theory and the concept is verified by a fabricated filter at 1 GHz.",
keywords = "Delay line, Interference suppression, Phase shifter, Power combiner, Tunable filter",
author = "Rui Zhu and Wang, {Yuanxun Ethan}",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 ; Conference date: 04-06-2017 Through 09-06-2017",
year = "2017",
month = oct,
day = "4",
doi = "10.1109/MWSYM.2017.8059073",
language = "English",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "2049--2051",
booktitle = "2017 IEEE MTT-S International Microwave Symposium, IMS 2017",
address = "United States",
}