Novel wiggly-line interdigital microstrip bandpass filter with/sup rd/rd harmonic suppression

Author

Pang, Hoi-Kai ; Ting, So-Weng ; Tam, Kam-Weng

Author_Institution

Dept. of Electr. & Electron. Eng., Macau Univ., China

fYear

2003

fDate

Oct. 28 2003-Nov. 1 2003

Firstpage

738

Lastpage

741

Abstract

In this paper, we present a novel interdigital microstrip bandpass filter with 3/sup rd /harmonic suppression. With this new configuration, which applies a continuous perturbation to the strip width at the inner edges following a sinusoidal law. 3/sup rd /harmonic passband can be suppressed whilst the intrinsic 2/sup nd /harmonic passband free property is retained. In order to demonstrate the characteristics of the proposed filter, 3/sup rd /order Butterworth interdigital bandpass filters centered at 800 MHz with 15% fractional bandwidth of the proposed structure and the conventional ones are designed, respectively. From the EM simulation and experimental results, good agreement is obtained and it is found that no 2/sup nd /harmonic passband as well as more than 10 dB suppression at 3/sup rd /harmonic frequency is achieved by the proposed filter.

Keywords

Butterworth filters; band-pass filters; harmonics suppression; microstrip filters; 3/sup rd /harmonic suppression; Butterworth interdigital bandpass filters; EM simulation; intrinsic 2/sup nd /harmonic passband free property; wiggly-line interdigital microstrip bandpass filter; Band pass filters; Bandwidth; Dual band; Frequency; Harmonics suppression; Microstrip filters; Modems; Passband; Power harmonic filters; Strips;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas, Propagation and EM Theory, 2003. Proceedings. 2003 6th International SYmposium on

Conference_Location

Beijing, China

Print_ISBN

0-7803-7831-8

Type

conf

DOI

10.1109/ISAPE.2003.1276792

Filename

1276792