Title :
Compact dual-band microstrip bandpass filter without external feeds
Author :
Sun, Sheng ; Zhu, Lei
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
A compact dual-band microstrip bandpass filter is proposed and designed to operate at 2.4 and 5.2GHz without needing any external impedance-matching block. The modified half-wavelength stepped-impedance resonator with sinuous configuration is constructed to simultaneously excite the dual resonances at these two specified frequencies with miniaturized overall size. The parallel-coupled microstrip line is properly characterized to minimize the return losses within both dual passbands. The optimized results exhibit the good dual-band filtering performances with return losses higher than 20dB as well being confirmed by experimentation with a fabricated filter circuit.
Keywords :
UHF filters; band-pass filters; microstrip filters; microwave filters; resonator filters; 2.4 GHz; 5.2 GHz; compact dual-band microstrip bandpass filter; dual resonance; dual-band filtering; half-wavelength stepped-impedance resonator; parallel-coupled microstrip lines; Band pass filters; Dual band; Feeds; Filtering; Frequency; Impedance; Microstrip filters; Passband; Resonance; Resonator filters; Microstrip dual-band filter; parallel-coupled microstrip line; size compactness; stepped-impedance resonator (SIR);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2005.856687
