Please login using the form on menu list.|
It is required to login for Full-Text PDF.
Technique for Improving Out-of-Band Characteristics of Planar Microwave Filters Using Tapped Resonators
IEICE TRANSACTIONS on Electronics Vol.E85-C No.2 pp.391-399
Publication Date: 2002/02/01
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Microwaves, Millimeter-Waves
planar microwave filter,
Full Text: PDF(797.1KB)
A simple method for improving out-of-band characteristics of a planar microwave filter is proposed. We clarify the close relationship among 'tap connection,' 'attenuation pole' and 'spurious responses' in filter design, theoretically and experimentally. Firstly, the basic characteristics of the resonator depending on the excitation method are examined. We show that skirt characteristics can be improved and spurious responses can be suppressed by using the tap connection technique. Secondly, the application examples of bandpass filters (BPFs) on the basis of the resonator with our principle are provided. It is confirmed that the resonator depending on the excitation method is useful for improving out-of-band characteristics of the planar microwave filter.