scholarly journals A Tuable Dual-Band Bandpass Filter Design Using Variable Characteristic Transmission Lines

Author(s):  
Girdhari Chaudhary ◽  
Yong-Chae Jeong ◽  
Jong-Sik Lim ◽  
Dong-Su Kim ◽  
Jun-Chul Kim
2011 ◽  
Vol 53 (7) ◽  
pp. 1505-1511
Author(s):  
Xiao-Hua Wang ◽  
Quan Xue ◽  
Kim Fung Man

2021 ◽  
Vol 95 ◽  
pp. 147-153
Author(s):  
Yun Xiu Wang ◽  
Yuan Li Chen ◽  
Wen Hui Zhou ◽  
Wei Chao Yang ◽  
Jin Zen

Frequenz ◽  
2014 ◽  
Vol 69 (1-2) ◽  
pp. 65-70
Author(s):  
Jianzhong Chen ◽  
Xuefeng Li ◽  
Hongyu Shi ◽  
Anxue Zhang

Abstract A new design approach for a stepped impedance resonator (SIR) dual-band bandpass filter (BPF) with high multi-spurious suppression is proposed in this paper. The external coupling property of an SIR at multi-order resonant frequencies is fully studied. Different input impedances at desired frequencies are achieved by optimizing the unequal impedance transformer. The new solution shows the freedom in the choice of tapping point. The external quality values of multi-order harmonics vary with the shift of the tapping position. Wide upper stop-band rejection is realized by mismatching Qe at the unwanted harmonic frequencies, while keeping the Qe suitable for operating dual band to obtain good in-band performance. A traditional dual-band BPF and a novel practical BPF operated at 2.45/5.25 GHz are designed and fabricated to demonstrate the above idea. Good simulated and measured results are presented.


2014 ◽  
Vol 56 (10) ◽  
pp. 2211-2214 ◽  
Author(s):  
Ali Kursad Gorur ◽  
Ceyhun Karpuz ◽  
Ahmet Ozek ◽  
Murat Emur

2009 ◽  
Vol 19 (6) ◽  
pp. 350-352 ◽  
Author(s):  
Xiu Yin Zhang ◽  
Jin Shi ◽  
Jian-Xin Chen ◽  
Quan Xue

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