Determination of Transmission Zero Frequency for Complementary Split-Ring Resonator/Split-Ring Resonator Unit Cells from Effective Permittivity and Permeability

2019 ◽  
Author(s):  
Amer Abbood AL-BEHADILI ◽  
Teodor PETRESCU
Keyword(s):  
Ring Resonator ◽  
Effective Permittivity ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Transmission Zero ◽  
Complementary Split Ring Resonator ◽  
Permittivity And Permeability ◽  
Unit Cells ◽  
Zero Frequency

scholarly journals Isolation Improvement Technique for Two Closely Spaced Loop Antennas Using MTM Absorber Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Hongmin Lee ◽  
Hyungsup Lee
Keyword(s):  
Ring Resonator ◽  
Split Ring Resonator ◽  
Unit Cell ◽  
New Method ◽  
Negative Permittivity ◽  
Split Ring ◽  
Antenna Structure ◽  
Complementary Split Ring Resonator ◽  
Permittivity And Permeability ◽  
Loop Antennas

This paper presents a new method to improve isolation between two loop antennas with absorber cells exhibiting negative permittivity and permeability at the aimed frequency of 2.54 GHz. The metamaterial (MTM) unit cell was constructed by two open complementary split ring resonator (OCSRR) and a split ring resonator (SRR) arrangement. The proposed antenna structure consists of two loop antennas occupying a space with the dimensions of51 mm×24 mm×2 mmand three absorber cells. The size of each absorber unit cell is7.4 mm×7 mm×2 mm. The isolation of more than 20 dB was achieved with three absorber cells loaded between two loop antennas; interantenna spacing (center to center) is 0.23λ0at 2.54 GHz. The results show that port-to-port isolation between two antennas can be improved with absorber.

Mutual-coupling reduction in triple-band MIMO antennas for WLAN using CSRRs

2020 ◽  
Vol 12 (8) ◽  
pp. 762-768
Author(s):  
Vahid Najafy ◽  
Mohammad Bemani
Keyword(s):  
Mutual Coupling ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Mimo Antennas ◽  
Complementary Split Ring Resonator ◽  
Unit Cells ◽  
Final Design ◽  
Triple Band ◽  
Mutual Coupling Reduction

AbstractFor the requirements of low mutual-coupling MIMO antennas for WLAN, a new complementary split-ring resonator (CSRR) unit cell is introduced in this paper. A microstrip-fed Vivaldi antenna array is designed for WLAN applications, where compact triple-band gap-complementary split-ring resonator unit cells are loaded between two antennas to examine the effect of unit cells on the rate of mutual-coupling reduction. By inserting the CSRR, the final design offered an improvement in decoupling by 8.5, 10.5, and 18 dB at 3.65, 4.9, and 5.8 GHz, respectively, compared with the reference antenna. By suppressing surface waves, antenna gain and front-to-back ratio are improved.

scholarly journals Complementary Split-Ring Resonator for Microwave Heating of µL Volumes in Microwells in Continuous Microfluidics

Chemosensors ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 184
Author(s):  
Tomislav Markovic ◽  
Gertjan Maenhout ◽  
Matko Martinic ◽  
Bart Nauwelaers
Keyword(s):  
Microwave Heating ◽  
Ring Resonator ◽  
Casting Process ◽  
Split Ring Resonator ◽  
Sample Volume ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Microwave Dielectric ◽  
Electric Field Direction ◽  
Made In

This work presents the design and evaluation of a planar device for microwave heating of liquids in continuous microfluidics (CMF) made in polydimethylsiloxane (PDMS). It deals with volumes in the µL range, which are of high interest and relevance to biologists and chemists. The planar heater in this work is conceived around a complementary split-ring resonator (CSRR) topology that offers a desired electric field direction to—and interaction with—liquids in a microwell. The designed device on a 0.25 mm thick Rogers RO4350B substrate operates at around 2.5 GHz, while a CMF channel and a 2.45 µL microwell are manufactured in PDMS using the casting process. The evaluation of the performance of the designed heater is conducted using a fluorescent dye, Rhodamine B, dissolved in deionized water. Heating measurements are carried out using 1 W of power and the designed device achieves a temperature of 47 °C on a sample volume of 2.45 µL after 20 s of heating. Based on the achieved results, the CSRR topology has a large potential in microwave heating, in addition to the already demonstrated potential in microwave dielectric sensing, all proving the multifunctionality and reusability of single planar microwave-microfluidic devices.

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