An Empirical Study of a Coplanar Bandpass Filter with Attenuation Poles Using Short-Ended Half-Wavelength Resonators

Kouji WADA  Yoshiyuki AIHARA  Osamu HASHIMOTO  Hiroshi HARADA  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E86-A   No.2   pp.273-279
Publication Date: 2003/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
short-ended half-wavelength resonator,  tap-coupling,  attenuation pole,  bandpass filter,  coplanar waveguide (CPW),  

Full Text: PDF>>
Buy this Article




Summary: 
Basic characteristics of a short-ended half-wavelength resonator made of a coplanar waveguide (CPW) and their applications to bandpass filters (BPFs) are discussed. The first part of this paper gives the essence for improving out-of-band characteristics of the BPF by describing the basic characteristics of a tap-coupled resonator. Secondly, a new BPF with attenuation poles using the short-ended half-wavelength CPW resonators is proposed and realized. It is confirmed that our methodology is useful for improving out-of-band characteristics of the BPF using the short-ended half-wavelength CPW resonators without complicated filter design.