@article{8c1c2b55407242ce87bb8a2dc59edc90,
title = "Novel compact parallel-coupled microstrip bandpass filters with lumped-element K-inverters",
abstract = "Novel compact parallel-coupled microstrip bandpass filters are proposed by using additional lumped inductors to realize K-inverters between coupled-line sections to achieve an equivalent to the quarter-wavelength (λ/4) resonator filters. As a result, the filter order can be doubled without increasing the circuit area, and no repeated passband is observed at twice the center frequency. In addition, by introducing the cross-coupling effect, two transmission zeros at upper and lower stopbands may be created. Simple equivalent-circuit models are also established as effective design tools. Specifically, several compact fourth-order microstrip bandpass filters with good stopband rejection are implemented and carefully examined.",
keywords = "Bandpass filter, Coupled line, Lumped element, Microstrip",
author = "Lin, {Yo Shen} and Wang, {Chi Hsueh} and Wu, {Chao Huang} and Chen, {Chun Hsiung}",
note = "Funding Information: Manuscript received April 2, 2004; revised August 22, 2004. This work was supported by the National Science Council of Taiwan, R.O.C., under Grant NSC 93-2219-E-002-021 and Grant NSC 93-2752-E-002-001-PAE. The authors are with the Department of Electrical Engineering and Graduate Institute of Communication Engineering, National Taiwan University, Taipei 106, Taiwan, R.O.C. (e-mail:
[email protected]). Digital Object Identifier 10.1109/TMTT.2005.850445 Fig. 1. Layout of the proposed fourth-order microstrip bandpass filter (w = 2:1 mm, s = 0:3 mm, ` = 21:7 mm, w = 3:8 mm, s = 3:5 mm, ` = 18:2 mm, d = 0:7 mm, g = 0:3 mm, ` = 1:6 mm).",
year = "2005",
month = jul,
doi = "10.1109/TMTT.2005.850445",
language = "???core.languages.en_GB???",
volume = "53",
pages = "2324--2327",
journal = "IEEE Transactions on Microwave Theory and Techniques",
issn = "0018-9480",
number = "7",
}