Meander Open Complementary Split Ring Resonator (MOCSRR) Particles Implemented

Using Coplanar Waveguides

Benjamin D. Braaten*Masud A. Aziz

Mark J. SchroederHongxiang Li

North Dakota State University: Applied Electromagnetics Lab

Topics

Introduction and Background The MOCSRR Particle Modeling the MOCSRR Particle Discussion Conclusion

North Dakota State University: Applied Electromagnetics Lab

Introduction and Background

[1] A. Velez, F. Aznar, J. Bonache, M. C. Valazquez-Ahumada, J. Martel and F. Martin, “Open complementary split ring resonators (OCSRRs) and their application to wideband CPW band pass filters,” IEEE Microwave and Wireless Component Letters, vol. 19, no. 4, pp. 197-199, Apr. 2009.

The open complementary split ring resonator (OCSRR) particle [1]:

North Dakota State University: Applied Electromagnetics Lab

Introduction and Background

[2] B. D. Braaten, “A novel compact UHF RFID tag antenna designed using series connected open complementary split ring resonator (OCSRR) particle,” Accepted for publication in the IEEE Transactions on Antennas and Propagation.

The OCSRR particle has been used to design small resonant antennas [2]:

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The MOCSRR Particle

The meander open complementary split ring resonator (MOCSRR) particle:

North Dakota State University: Applied Electromagnetics Lab

Modeling the MOCSRR Particle

M = 1.0 mm, N = 3.64 mm, d = 1.27 mmDuroid 6010

CPW structure used to measure the MOCSRR particle:

North Dakota State University: Applied Electromagnetics Lab

Modeling the MOCSRR Particle

W = 10.4 mmH = 10.4 mmp = 0.35 mmh = 6.4 mmr = 3.2 mmg = 0.6 mmt = 0.6 mmq = 0.3 mmd = 3.61 mmv = 0.6 mms = 1.0 mm

Dimensions:

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Modeling the MOCSRR Particle

Printed MOCSRR particle: S-parameters:

Leq = 9.25 nHCeq = 5.1 pFfo = 735 MHz

Leq = 11.21 nHCeq = 2.24 pFfo = 1.0 GHz

OCSRR

North Dakota State University: Applied Electromagnetics Lab

Modeling the MOCSRR Particle

Surface currents on the MOCSRR Particle:

North Dakota State University: Applied Electromagnetics Lab

Modeling the MOCSRR ParticleProperties of the MOCSRR particle for various values of r and δ :

δ r Leq (nH) Ceq (pF) fo (GHz)

0.9 1.6 3.6 2.9 1.55

1.0 1.7 3.8 2.75 1.55

1.1 1.8 3.7 2.85 1.55

1.2 1.9 3.4 3.1 1.55

1.3 2.0 3.4 3.15 1.53

1.4 2.1 3.5 3.1 1.52

1.5 2.2 3.7 3.25 1.45

North Dakota State University: Applied Electromagnetics Lab

W = 8.2 mmH = 8.2 mmt = 0.33 mmg = 0.31mm

Modeling the MOCSRR Particle

Properties of the MOCSRR particle for various scaling values S:

S Leq (nH) Ceq (pF) fo (GHz)

0.7 2.4 2.25 2.16

0.75 2.7 2.45 1.95

0.8 2.9 2.6 1.83

0.85 2.9 2.9 1.73

0.9 3.2 2.95 1.63

0.95 3.4 3.1 1.53

1.0 3.7 3.25 1.45

North Dakota State University: Applied Electromagnetics Lab

Modeling the OCSRR Particle

Properties of the OCSRR particle for various values of ro:

ro Leq (nH) Ceq (pF) fo (GHz)

1.0 1.5 2.95 2.39

1.2 1.5 2.95 2.39

1.4 1.5 3.0 2.37

1.6 1.5 3.0 2.37

1.8 1.4 3.25 2.35

2.0 1.7 3.05 2.2

2.2 1.7 3.05 2.2

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m = 8.1 mmn = 8.3 mmh = 0.45 mmg = 0.51mm

Modeling the OCSRR Particle

Properties of the OCSRR particle for various scaling values S:

S Leq (nH) Ceq (pF) fo (GHz)

0.7 1.0 2.85 2.98

0.75 1.1 2.9 2.81

0.8 1.3 2.85 2.61

0.85 1.3 3.2 2.56

0.9 1.4 3.15 2.39

0.95 1.4 3.25 2.35

1.0 1.7 3.05 2.2

North Dakota State University: Applied Electromagnetics Lab

Discussion

S Leq (nH)

Ceq (pF)

fo (GHz)

(MOCSRR)

0.7 2.4 2.25 2.16

0.75 2.7 2.45 1.95

0.8 2.9 2.6 1.83

0.85 2.9 2.9 1.73

0.9 3.2 2.95 1.63

0.95 3.4 3.1 1.53

1.0 3.7 3.25 1.45

The MOCSRR particle has a resonant frequency lower than the OCSRR particle with the same over all dimensions:

S Leq (nH)

Ceq (pF)

fo (GHz)

(OCSRR)

0.7 1.0 2.85 2.98

0.75 1.1 2.9 2.81

0.8 1.3 2.85 2.61

0.85 1.3 3.2 2.56

0.9 1.4 3.15 2.39

0.95 1.4 3.25 2.35

1.0 1.7 3.05 2.2

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Discussion Designing antennas [3]:

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[3] B. D. Braaten and M. A. Aziz, “Using meander open complementary split ring resonator (MOCSRR) particles to design a compact UHF RFID tag antenna,” Under review for the Antennas and Wireless Propagation Letters.

Conclusion

A new meander open complementary split ring resonator particle based on the open complementary split ring resonator particle has been presented.

It has been shown that the MOCSRR particle has a lower resonant frequency than the OCSRR particle with similar over all dimensions.

Also, the equivalent circuit for various OCSRR and MOCSRR particles was extracted and presented. These results showed that in certain circumstances is was

possible to predict the resonant frequency of the particle. Finally, this was followed by a discussion on

antenna design using the MOCSRR particles.

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Questions

Thank you for listening!

North Dakota State University: Applied Electromagnetics Lab