Title of article
Design of Microstrip Low-Pass Filter with Ultra-wide Stopband and Sharp Rejection
Author/Authors
Lotfi، Saeedeh نويسنده Department of Electrical Engineering, Islamic Azad University, Science and Research Branch, Kermanshah Lotfi, Saeedeh , Makki، Seyed Vahab AL-Din نويسنده Department of Electrical Engineering, Faculty of Engineering, Razi University, Kermanshah Makki, Seyed Vahab AL-Din , Majidifar، Sohrab نويسنده Department of Electrical Engineering, Kermanshah University of Technology, Kermanshah Majidifar, Sohrab
Issue Information
روزنامه با شماره پیاپی 0 سال 2014
Pages
11
From page
47
To page
57
Abstract
In this paper, a microstrip lowpass filter with ultra-wide stopband and sharp rejection is presented. To achieve sharp frequency response and ultra-wide stopband, both closed loop stepped impedance (CLSI) and U-shape resonators are used. Accordingly the proposed filter with 3 dB Cut-off frequency at 3.63 GHz has been designed, fabricated and measured. The rejection band extended over -20dB from 3.95GHz to 40GHz. This stopband bandwidth is equal to 9.93 fc, moreover the size of the filter is 0.33?g×0.18 ?g, which was: ?g is the guided wavelength at the Cut-off frequency. The filter design based on scale factor of its component has been investigated to generalize its characteristics to the other practical Cut-off frequency. It was concluded that the measurement results are in good agreement with simulations.
Journal title
International Journal of Engineering and Technology Sciences
Serial Year
2014
Journal title
International Journal of Engineering and Technology Sciences
Record number
1181688
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