A reconfigurable bandpass-bandstop filter based on varactor-loaded closed-ring resonators [Technical Committee]

2009 ◽  
Vol 10 (1) ◽  
pp. 138-140 ◽  
Author(s):  
Yi-Ming Chen ◽  
Sheng-Fuh Chang ◽  
Cheng-Yu Chou ◽  
Kun-Hsing Liu
Keyword(s):  
Technical Committee ◽  
Ring Resonators ◽  
Closed Ring ◽  
Bandstop Filter

Switchable square ring bandpass to bandstop filter for ultra-wideband applications

2015 ◽  
Vol 9 (1) ◽  
pp. 51-60
Author(s):  
Mushtaq Alqaisy ◽  
Chandan K. Chakrabraty ◽  
Jawad K. Ali ◽  
Adam Reda Alhawari ◽  
Tale Saeidi
Keyword(s):  
Computer Simulation ◽  
Radio Frequency ◽  
Ultra Wideband ◽  
Ring Resonators ◽  
Microstrip Filter ◽  
Filter Structure ◽  
Closed Ring ◽  
Effective Cost ◽  
Bandstop Filter ◽  
Good Agreement

In this manuscript, serial-shunt of square ring resonators with step-impedance open circuited stub resonators to produce a new on-off switchable bandpass to bandstop response in the same ultra-wideband microstrip filter structure is proposed. The closed ring of series-shunt square ring resonators with a combine stubs are introduced to excite the bandpass response while bandstop characteristic excited when gaps are embedded in the corners of the square ring resonators. The main advantage of this microstrip filter is its capability to switch from bandpass-to-bandstop operation using open-short gap, respectively. A microwave simulator is utilized to show the switchable case by replacing Skyworks radio frequency diodes (RF-PIN) instead of those gaps. The entire filter models have been simulated using the computer simulation technology (CST) Microwave Studio. The computed results for the proposed filters were compared with the measured results of the both prototype structures (bandpass- and bandstop-filter). The codes also showed good agreement between them. Other advantages include being small in size, and low in effective cost.

Optically Transparent Broadband Microwave Absorption Metamaterial By Standing-Up Closed-Ring Resonators

2017 ◽  
Vol 5 (13) ◽  
pp. 1700109 ◽  
Author(s):  
Dawei Hu ◽  
Jie Cao ◽  
Wei Li ◽  
Cheng Zhang ◽  
Tianlong Wu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Ring Resonators ◽  
Closed Ring ◽  
Optically Transparent ◽  
Standing Up

Reconfigurable 4 pole bandstop filter based on RF-MEMS-loaded split ring resonators

2010 ◽  
Author(s):  
David Bouyge ◽  
Aurelian Crunteanu ◽  
Arnaud Pothier ◽  
P. Olivier Martin ◽  
Pierre Blondy ◽  
...  
Keyword(s):  
Rf Mems ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Bandstop Filter

scholarly journals E-plane waveguide bandstop filter with double-sided printed-circuit insert

2017 ◽  
Vol 30 (2) ◽  
pp. 223-234
Author(s):  
Snezana Stefanovski-Pajovic ◽  
Milka Potrebic ◽  
Dejan Tosic ◽  
Zoran Stamenkovic
Keyword(s):  
Filter Design ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Plane Waveguide ◽  
Mutual Distance ◽  
Third Order ◽  
Split Ring ◽  
Printed Circuit ◽  
Bandstop Filter ◽  
Novel Design

In this paper a novel design of an E-plane bandstop waveguide filter with a double-sided printed-circuit insert is presented. Split-ring resonators are used as the resonating elements to obtain the bandstop response. The amplitude response of the waveguide resonator with a single resonating element on the insert is analyzed for various dimensions and positions of the split-ring resonator. The coupling between two resonators on the insert, in terms of their mutual distance, is considered as a next step to the filter design. Various positions of the resonators are considered, including the case with the resonators on the different sides of the insert, which is of interest for the proposed filter design. Finally, a third-order bandstop filter with a double-sided printed-circuit insert, operating in the X-frequency band, is introduced. The filter response is analyzed for various distances between the resonators and for various positions of the resonator printed on the other side of the insert. Proposed filter design is simple, providing for the accurate fabrication, miniaturization and possibility to relatively easy obtain multi-band response, using resonators with different resonant frequencies on the different sides of the insert.

Coupled ring resonator for microwave characterization of dielectric materials

2012 ◽  
Vol 4 (2) ◽  
pp. 241-246 ◽  
Author(s):  
Mahima Kapoor ◽  
K. S. Daya ◽  
G. S. Tyagi
Keyword(s):  
Dielectric Constant ◽  
Spirulina Platensis ◽  
Ring Resonator ◽  
Dielectric Materials ◽  
Split Ring Resonator ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Closed Ring

In this paper characterization of dielectric materials in liquid and powder phase using concentric closed and split ring resonators of length λ, λ/2, and λ/4 is reported. Experimental results have been validated by simulations and theoretically modeling. Sensitivity of the resonator with closed rings was maximum. Experimentally extracted values of dielectric constant of ferrite ranged from 14.05 to 15.1 with closed ring resonators and from 13.6 to 14.02 with split ring resonator, respectively. For spirulina platensis the dielectric constant was lying in the range 1.78–1.93 and 1.74–2.04 with closed ring and split ring resonators, respectively. The values extracted experimentally are in good agreement with simulation and theoretically found values. However, the values obtained from closed ring resonator were in agreement with the dielectric constant values of ferrite and spirulina platensis.

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