Title :
Ultra-wideband bandpass filter with notch and upper-band suppression
Author :
Kuwamoto, H. ; Ruibing Dong ; Kanemoto, D. ; Pokharel, R.K. ; Kanaya, Haruichi ; Yoshida, K.
Author_Institution :
Dept. of Electron., Kyushu Univ., Fukuoka, Japan
Abstract :
A novel ultra-wide band (UWB) bandpass filter (BPF) rejecting two unnecessary bands is proposed. The filter consists of a modified stepped impedance resonator (SIR) and four interdigital coupled lines in the main part. Three pairs of open stubs are connected to the SIR in order to make notch in the passband and reject the upper-stopband. By optimizing the length, width and location of the stubs, -10dB suppression is realized from 5.15 GHz to 5.8 GHz and from 11 GHz to 30 GHz. The proposed filter size is 16.4 × 4.2 mm2. 2.5 dimentional EM simulator was used to optimize the filter layout, and the measured results are good agreement with the simulated responses. The 3 dB bandwidth of our proposed UWB BPF is from 3.2 to 4.9 GHz and form 6.2 to 10.5 GHz in experiment.
Keywords :
band-pass filters; microwave filters; millimetre wave filters; notch filters; resonator filters; ultra wideband communication; SIR; UWB BPF; bandwidth 3.2 GHz to 4.9 GHz; bandwidth 6.2 GHz to 10.5 GHz; dimentional EM simulator; filter layout optimization; frequency 11 GHz to 30 GHz; frequency 5.15 GHz to 5.8 GHz; gain -10 dB; interdigital couple line; notch filter; stepped impedance resonator; ultrawideband bandpass filter; upper-stop band suppression; Bandpass filter (BPF); dual coupled line; multiple-mode resonator (MMR); open stub; ultra-wide band (UWB);
Conference_Titel :
Wireless Mobile and Computing (CCWMC 2011), IET International Communication Conference on
Conference_Location :
Shanghai
DOI :
10.1049/cp.2011.0877
