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
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
Journal title :
International Journal of Engineering and Technology Sciences
