Title :
Compact Wideband Bandpass Filters With Wide Upper Stopband
Author :
Mondal, Priyanka ; Chakrabarty, Ajay
Author_Institution :
Dept. of Electron. & Electr. Commun. Eng., Indian Inst. of Technol., Kharagpur
Abstract :
In this letter, a T-shaped microstrip feeding arrangement is proposed to design wideband bandpass filter (BPF) using shorted slot-line resonators. This feed line produces frequency selective external coupling which is utilized to suppress unwanted harmonics. Up to sixth order harmonics are suppressed. Other advantages are low passband group delay variation, ease of fabrication, low insertion loss (IL), and compact size. A fabricated BPF of fractional bandwidth 56.3% at midband frequency 2.3 GHz has a maximum IL of 1.2 dB in its passband and 30-dB upper stopband extends over 11.53 GHz
Keywords :
band-pass filters; frequency selective surfaces; interference suppression; microstrip lines; strip line resonators; 2.3 GHz; T-shaped microstrip feeding arrangement; compact wideband bandpass filters; frequency selective external coupling; low passband group delay variation; microstrip line; slot-line resonators; unwanted harmonic suppression; wide upper stopband; Band pass filters; Delay; Fabrication; Feeds; Frequency; Microstrip filters; Microstrip resonators; Passband; Power harmonic filters; Wideband; Bandpass filter (BPF); harmonic suppression; microstrip line; slot-line; slot-line resonators (SLRs);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.887247
