NDLI: Novel Corrugated Coupled-Line Stage with Ideal Frequency Response and Its Application to Bandpass Filter Design with Multi-Harmonic Suppression

Content Provider	IEEE Xplore Digital Library
Author	Jen-Tsai Kuo U-Hou Lok Meng-Huan Wu
Copyright Year	2007
Description	Author affiliation: Nat. Chiao Tung Univ., Hsinchu (Jen-Tsai Kuo; U-Hou Lok; Meng-Huan Wu)
Abstract	Coupled-line stages are designed with corrugated periods to accurately allocate inherent transmission zeros at three leading even harmonics of design frequency, $f_{o}.$ The corrugation pattern is finely trimmed so that phase velocities of the two eigenmodes can be simultaneously equalized at these frequencies. By decreasing number of coupled periods in a stage, frequencies of the zeros can be arbitrarily scaled up to a certain extent. In this way, a parallel-coupled line bandpass filter with a cascade of several such stages can be synthesized to be free of spurious harmonics up to at least 10 $f_{o},$ with aid of tapped input/output coupling scheme. The measured data of the fabricated bandpass filter show a rejection level of better than 30 dB in the upper stopband up to 18 $f_{o}.$
Starting Page	553
Ending Page	556
File Size	2946498
Page Count	4
File Format	PDF
ISBN	1424406870
ISSN	0149645X
DOI	10.1109/MWSYM.2007.380549
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-06-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency response Band pass filters Couplings Power harmonic filters Filtering theory Passband Circuits Design engineering Microwave filters Resonator filters stopband Bandpass filter corrugation coupled-line stage spurious suppression
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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