Multi-harmonic Suppression Band-Pass Filter for Communication System

  • Zhang, Wenmei (College of Physics and Electronics, Shanxi University) ;
  • Han, Liping (College of Physics and Electronics, Shanxi University) ;
  • Ma, Runbo (College of Physics and Electronics, Shanxi University) ;
  • Mao, Junfa (Department of Electronic Engineering, Shanghai JiaoTong University)
  • Received : 2007.02.07
  • Published : 2007.08.31

Abstract

For the purpose of decreasing intermodulation distortion, a new multi-harmonic suppression band-pass filter based on a microstrip radial stub is studied. Compared with traditional resonator filters, the new filter can suppress the second, third, and even fourth harmonics directly. The dimension of the filter is about $0.3\;{\lambda}_{g^0}{\times}0.13\;{\lambda}_{g^0}$ (${\lambda}_{g^0}$ is the guiding wavelength at the resonant frequency). Only one gap was introduced, so lower insertion loss can be obtained. Basic agreement between the measured and simulated results has been achieved.

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