Fractal-shape 40 GHz microstrip bandpass filter on high-resistivity Si for suppression of the 2nd harmonic

Author

Kim, Il Kwon ; Kingsley, Nickolas ; Morton, Matt ; Papapolymerou, John ; Tentzeris, Manos M. ; Yook, Jong-Gwan

Author_Institution

Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea

Volume

2

fYear

2005

fDate

4-6 Oct. 2005

Abstract

In this paper, the Koch fractal shape is applied for the first time to microstrip bandpass filters integrated on a high-resistivity Si substrate. By using this method, the second harmonics of the filter can be suppressed to about -40 dB. Conventional microstrip coupled line filters are popular in RF front ends, because they can be easily fabricated and integrated with other RF components. However, they typically have large second harmonics that can cause unwanted interference. Without any additional filters, the proposed Koch shape filters have suppressed the 2nd harmonics by about -40 dB, so they can be used in systems with stringent harmonic suppression requirements.

Keywords

band-pass filters; harmonics suppression; microstrip filters; millimetre wave filters; silicon; 40 GHz; Koch fractal shape; RF components; RF front ends; bandpass filter; fractal-shape filter; harmonic suppression; high-resistivity silicon substrate; microstrip coupled line filters; microstrip filter; millimeter wave filter; Band pass filters; Filling; Fractals; Geometry; Microstrip filters; Power harmonic filters; Radio frequency; Radiofrequency integrated circuits; Shape; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2005 European

Print_ISBN

2-9600551-2-8

Type

conf

DOI

10.1109/EUMC.2005.1610053

Filename

1610053