@inbook{fd6d53df6995463b85caaa209765e35d,
title = "Quasi-elliptic coupled-line-based balanced bandpass filters with ultra-wide stopband characteristics",
abstract = "This paper presents the RF design of new types of balanced quasi-elliptic bandpass filters (BPFs). They are based on modified capacitive-loaded coupled line configurations and exhibit: i) highly-selective quasi-elliptic power transmission response in the differential (DD) mode of operation with ultra-wide stopband suppression and ii) ultra-wide common (CC) mode suppression. The proposed filter concept is presented by means of linear circuit analysis. For proof-of-concept demonstration purposes, a microstrip prototype operating at a center frequency of 3.45 GHz was designed, manufactured and measured. The proposed filter exhibits the following RF performance characteristics: 3-dB fractional bandwidth= 4.3\%, > 20 dB out-of-band rejection from DC-3.24 GHz and 3.64-16 GHz, and >11 dB of CC mode suppression from DC to >16 GHz. Good agreement is observed between simulated and measured S-parameters.",
keywords = "Balanced filter, Bandpass filter, Coupled-line filter, Highly-selective filter, Ultra-wide stopband",
author = "Mengdan Kong and Dimitra Psychogiou and Yongle Wu",
note = "Publisher Copyright: {\textcopyright} 2020 IEEE.; 2020 IEEE/MTT-S International Microwave Symposium, IMS 2020 ; Conference date: 04-08-2020 Through 06-08-2020",
year = "2020",
month = aug,
doi = "10.1109/IMS30576.2020.9224109",
language = "English",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "679--682",
booktitle = "IMS 2020 - 2020 IEEE/MTT-S International Microwave Symposium",
address = "United States",
}