Parallel coupled microstrip filters with suppression of harmonic response

Author

Kuo, Jen-Tsai ; Hsu, Wei-Hsiu ; Huang, Wei-Ting

Author_Institution

Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan

Volume

12

Issue

10

fYear

2002

Firstpage

383

Lastpage

385

Abstract

Corrugated coupled microstrip lines are proposed to design planar microwave filters with suppression of spurious response at twice the center frequency (2f/sub o/). The corrugated structure is designed to equalize the phase velocities of the two eigenmodes in the propagation direction. The designed bandpass filters have a wide upper stopband with satisfactory attenuation levels. In addition, the symmetry of the passband response is improved. Measured results of two fabricated circuits show that the idea works very well.

Keywords

Chebyshev filters; band-pass filters; coupled circuits; harmonics suppression; microstrip filters; Chebyshev filter; attenuation levels; bandpass filters; corrugated coupled microstrip lines; eigenmode phase velocity equalization; harmonic response suppression; parallel coupled microstrip filters; passband response symmetry; planar microwave filters; spurious response suppression; upper stopband; Band pass filters; Councils; Current distribution; Frequency; Microstrip filters; Microwave filters; Passband; Power harmonic filters; Resonator filters; Stripline;

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2002.804559

Filename

1040280