TY - JOUR
T1 - Stepped impedance resonator bandpass filters with tunable transmission zeros and its application to wide stopband design
AU - Kuo, Jen Tsai
AU - Shih, Eric
PY - 2002
Y1 - 2002
N2 - Bandpass filters with a very wide stopband are designed using parallel coupled stepped impedance resonators (SIR), which have advantageous resonance harmonic characteristics. The singly loaded Q (Qsi) of a tapped SIR is derived, so that the relation between Qsi and the position of tap point can be established. It is known that a single resonator with tapped input can create an extra zero. It is found that in this paper, with proper tapping at the first and the last SIR’s of a bandpass filter, two zeros can be created and tuned independently over a wide frequency range. By exploiting both the advantageous resonance characteristics of SIR and tapped-line input, a bandpass filter with high selectivity and/or wide stopband can be realized. The experimental results show a good agreement with the simulated prediction.
AB - Bandpass filters with a very wide stopband are designed using parallel coupled stepped impedance resonators (SIR), which have advantageous resonance harmonic characteristics. The singly loaded Q (Qsi) of a tapped SIR is derived, so that the relation between Qsi and the position of tap point can be established. It is known that a single resonator with tapped input can create an extra zero. It is found that in this paper, with proper tapping at the first and the last SIR’s of a bandpass filter, two zeros can be created and tuned independently over a wide frequency range. By exploiting both the advantageous resonance characteristics of SIR and tapped-line input, a bandpass filter with high selectivity and/or wide stopband can be realized. The experimental results show a good agreement with the simulated prediction.
UR - http://www.scopus.com/inward/record.url?scp=0036070070&partnerID=8YFLogxK
U2 - 10.1109/MWSYM.2002.1012166
DO - 10.1109/MWSYM.2002.1012166
M3 - 文章
AN - SCOPUS:0036070070
SN - 0149-645X
VL - 3
SP - 1613
EP - 1616
JO - IEEE MTT-S International Microwave Symposium Digest
JF - IEEE MTT-S International Microwave Symposium Digest
ER -