Journal Menu
Related Events
International Journal of Engineering & Technology Sciences
IJETS 2021, 12 pages - Article ID: IJETS-2106032112337
Design and Analysis of a Compact and Harmonic Suppressed Microstrip Lowpass Filter
Authors
Hesam Siahkamari a,
Saeedeh Lotfi b*,
Meisam Tahmasbi c,
Tomas Blecha b,
Richard, Linhart a,
Mohsen Hookari d,
Sahar Ahmadi a,
Maryam Jahanbakhshi a
a Department of Electronics and Information Technology, University of West Bohemia in Pilsen, Czech Republic
b Department of Material and Technologies, University of West Bohemia, Pilsen, Czech Republic
c Department of Electrical Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran
d Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
ABSTRACT
A new compact and harmonic suppressed microstrip Lowpass Filter (LPF) is designed to generate a sharp skirt transition band with wide rejection area. In this structure, some triangular and square-shaped structures are used. The suggested LPF with 3 dB cut-off frequency at 1.64 GHz has been designed, fabricated and tested to show the validity of the proposed LPF structure. LC equal model is extracted, then using the LC equal model, the output to input ratio of the filter is calculated. Exact equations for the main Transmission Zero (Tz) which placed after transition band, is computed and analyzed based on LC equal model and output to input ratio. The proposed LPF stopband is expanded from 1.89 GHz up to 15 GHz with suppression level more than 20 dB. Also, its Figure of Merit (FOM) is calculated about 22000.
A new compact and harmonic suppressed microstrip Lowpass Filter (LPF) is designed to generate a sharp skirt transition band with wide rejection area. In this structure, some triangular and square-shaped structures are used. The suggested LPF with 3 dB cut-off frequency at 1.64 GHz has been designed, fabricated and tested to show the validity of the proposed LPF structure. LC equal model is extracted, then using the LC equal model, the output to input ratio of the filter is calculated. Exact equations for the main Transmission Zero (Tz) which placed after transition band, is computed and analyzed based on LC equal model and output to input ratio. The proposed LPF stopband is expanded from 1.89 GHz up to 15 GHz with suppression level more than 20 dB. Also, its Figure of Merit (FOM) is calculated about 22000.
Microstrip; Lowpass Filter (LPF); Triangular structure; Square structure; Output to Input Ratio; Wide Stopband.