Design of Microstrip Lowpass Filter Using bend Configuration with Excellent sharpness in Transition Band

Author:

Mousavi Seyed Mohammad Hadi,Makki Seyed Vahab Al-Din,Siahkamari Hesam

Abstract

AbstractIn this letter, a microstrip lowpass filter (LPF) using bend configuration with several excellent features such as a compact size, great roll-off rate and high rejection in the stopband is presented. This structure is composed of a spiral transmission line loaded by several stepped impedance and T-shaped resonators. The cut-off frequency of the proposed filter is equal to 2.73 GHz and the transition band is from 2.73 up to 2.82 GHz with –3 and –20 dB attenuation point, respectively, which represents a very high sharpness in the transition band. To achieve a –40 dB rejection level in the stopband, multiple open stub and T-shaped patches are utilized. An acceptable agreement between EM-simulation and measurement results is observed.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering

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