Compact tunable bandpass filter with wide tuning range using ring resonator and short‐ended coupled lines

2015 ◽  
Vol 51 (7) ◽  
pp. 568-570 ◽  
Author(s):  
H. Zhu ◽  
A. Abbosh
Keyword(s):  
Tuning Range ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Wide Tuning Range ◽  
Coupled Lines ◽  
Tunable Bandpass Filter

scholarly journals Simple Coupled-Line Tunable Bandpass Filter With Wide Tuning Range

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 82286-82293
Author(s):  
Xiaoxiao Chen ◽  
Yongle Wu ◽  
Yuhao Yang ◽  
Weimin Wang
Keyword(s):  
Tuning Range ◽  
Bandpass Filter ◽  
Wide Tuning Range ◽  
Coupled Line ◽  
Tunable Bandpass Filter

Compact tunable bandpass filter with wide tuning range and enhanced stopband characteristics

2013 ◽  
Vol 49 (16) ◽  
pp. 1007-1008 ◽  
Author(s):  
B.L. Zhao ◽  
Z.T. He ◽  
X.B. Wei ◽  
Y. Shi
Keyword(s):  
Tuning Range ◽  
Bandpass Filter ◽  
Wide Tuning Range ◽  
Tunable Bandpass Filter

scholarly journals Compact tunable bandpass filter with improved stopband rejection and wide tuning range

2013 ◽  
Vol 10 (18) ◽  
pp. 20130561-20130561 ◽  
Author(s):  
Baolin Zhao ◽  
Guanghui Gao ◽  
Xubo Wei ◽  
Peng Gao ◽  
Yu Shi
Keyword(s):  
Tuning Range ◽  
Bandpass Filter ◽  
Wide Tuning Range ◽  
Tunable Bandpass Filter

scholarly journals Closed-loop ring resonator topology for bandpass filter applications

2020 ◽  
Vol 17 (3) ◽  
pp. 1422
Author(s):  
Norfishah Ab Wahab ◽  
M. N. Md Tan ◽  
M. N. Hushim
Keyword(s):  
Transmission Lines ◽  
Closed Loop ◽  
Bandpass Filter ◽  
Ring Resonator ◽  
Single Mode ◽  
Ring Structure ◽  
Transmission Zeros ◽  
Quarter Wavelength ◽  
Coupled Lines ◽  
Loop Ring

<p class="Pa41">This paper presents a single mode pseudo-elliptic bandpass resonator based on closed-loop ring topology. The resonator is built from six quarter wavelength transmission lines to form a square closed-loop ring structure. This structure creates transmission zeros at the lower and upper sidebands so that high selectivity bandpass filter response is achieved. The advantage of this topology is that the design is less complex since no perturbation is needed on the ring lines for creation of transmission zeros. Higher-order filters can be constructed by introducing quarter-wavelength coupled-lines, coupled at both input and output of the closed-loop ring resonator. For proof of concept, the filters are designed at 10 GHz up to 3<sup>rd</sup> order, simulated using full-wave electromagnetic simulator on microstrip substrate, <em>FR-4</em> with characteristics given as <em>Ԑr </em>= 4.70, <em>h </em>= 1.499 mm and <em>tan δ </em>= 0.012.  The filters are simulated and responses are found to be agreeable with the proposed idea.</p>

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