Design of a microstrip dual-band filter with modified short-circuit quarter-wavelength resonators

2009 ◽  
Vol 52 (1) ◽  
pp. 236-239
Author(s):  
Ching-Wen Tang ◽  
Che-Wei Shen
Keyword(s):  
Short Circuit ◽  
Dual Band ◽  
Quarter Wavelength ◽  
Band Filter

Compact dual-band bandpass filter using meander short-circuit quarter-wavelength resonators

2011 ◽  
Vol 54 (2) ◽  
pp. 344-346 ◽  
Author(s):  
H. W. Liu ◽  
Z. C. Zhang ◽  
G. W. Wei ◽  
L. Shen ◽  
X. H. Guan
Keyword(s):  
Bandpass Filter ◽  
Short Circuit ◽  
Dual Band ◽  
Quarter Wavelength

Dual-band filter design of combined half and quarter wavelength SIRs for WLAN applications

2007 ◽  
Vol 50 (1) ◽  
pp. 13-15 ◽  
Author(s):  
Pow-Wen Chen ◽  
Hao-Hung Ho ◽  
Min-Hua Ho ◽  
Ching-Her Lee
Keyword(s):  
Filter Design ◽  
Dual Band ◽  
Quarter Wavelength ◽  
Band Filter

High selective compact dual‐band filter using ring resonator with quarter‐wavelength stubs

2017 ◽  
Vol 53 (24) ◽  
pp. 1589-1591 ◽  
Author(s):  
Yatao Peng ◽  
Lijun Zhang ◽  
Zhanqi Zheng ◽  
Yongqing Leng
Keyword(s):  
Ring Resonator ◽  
Dual Band ◽  
Quarter Wavelength ◽  
Band Filter

scholarly journals Dual-band bandpass filter based on two U-shaped defected microstrip structure

2021 ◽  
Vol 22 (2) ◽  
pp. 909
Author(s):  
Mussa Mabrok ◽  
Zahriladha Zakaria ◽  
Yully Masrukin ◽  
Tole Sutikno
Keyword(s):  
Bandpass Filter ◽  
Short Circuit ◽  
Notch Filter ◽  
Dual Band ◽  
Design System ◽  
High Attenuation ◽  
Quarter Wavelength ◽  
Insertion Losses ◽  
Microstrip Structure ◽  
Better Than

This paper presents design of dual-band bandpass filter by integrating conventional quarter-wavelength short circuit stubs bandpass filter with U-shaped defected microstrip structure notch filter. Based on the parametric analysis, it is found that high attenuation level can be achieved by using two U-shaped defected microstrip structure separated by specific distance. The designed circuit simulated using advanced design system and fabricated based on Roger 4350B. The simulation results are in good agreement with measured results. The designed filter covered two pass bands centered at 2.51 GHz and 3.59 GHz with 3-dB fractional bandwidth of 15.94% and 15.86%, respectively, return losses better than 15 dB, and insertion losses better than 1 dB. The designed device can be used for wireless communication applications such as WLAN and WiMAX.

scholarly journals An Improved Stopband Dual-Band Filter Using Quad-Mode Stub-Loaded Resonators

Electronics ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 142
Author(s):  
Min-Hang Weng ◽  
Chun-Yueh Huang ◽  
Shi-Wei Dai ◽  
Ru-Yuan Yang
Keyword(s):  
High Performance ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Design Procedure ◽  
Local Area ◽  
Dual Band ◽  
Area Network ◽  
Quarter Wavelength ◽  
Band Filter ◽  
Insertion Losses

In this paper, we present a dual-band microstrip bandpass filter (BPF) with an improved stopband, which was constructed by a quad-mode stub-loaded resonator (SLR). Since the SLR is able to produce multiresonance within a single unit, the area saving is significant. The proposed quad-mode SLR was implemented by two stubs allocated at symmetry places, thus the even-/odd-mode can be applied to analysis the resonance. Moreover, to shift the spurious passband, the step impedance structure was applied to shift the harmonic resonance to the higher frequency. Design procedure for high performance dual-band BPF is proposed, and filter examples were designed for wireless local area network (WLAN) of 2.4/5.2 GHz. The measured insertion losses, return losses and fractional bandwidths (FBW) are 1.43 dB, 10 dB, and 14.8% at 2.4 GHz and 1.34 dB, 10 dB, and 12.9% at 5.2 GHz. Moreover, by applying two quarter-wavelength stubs on the input/output ports, the passband selectivity with an isolation of 40 dB can be achieved. The simulation and measurement have a close match, verifying the design concept.

3-D Printed Dual-Band Filter Based on Spherical Dual-Mode Cavity

2021 ◽  
pp. 1-1
Author(s):  
Yuan Chen ◽  
Gang Zhang ◽  
Jiasheng Hong ◽  
Zhengyu Sun ◽  
Jiquan Yang ◽  
...  
Keyword(s):  
Dual Band ◽  
Dual Mode ◽  
Band Filter
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