1. Benjamin D. Braaten* Masud A. Aziz Mark J. Schroeder Hongxiang Li
Meander Open Complementary Split Ring Resonator (MOCSRR) Particles Implemented Using Coplanar Waveguides
Benjamin D. Braaten*
Masud A. Aziz
Mark J. Schroeder
Hongxiang Li
North Dakota State University: Applied Electromagnetics Lab

2. 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

3. Introduction and Background
The open complementary split ring resonator (OCSRR) particle [1]:
[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 , Apr
North Dakota State University: Applied Electromagnetics Lab

4. Introduction and Background
The OCSRR particle has been used to design small resonant antennas [2]:
[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.
North Dakota State University: Applied Electromagnetics Lab

5. North Dakota State University: Applied Electromagnetics Lab
The MOCSRR Particle
The meander open complementary split ring resonator (MOCSRR) particle:
North Dakota State University: Applied Electromagnetics Lab

6. Modeling the MOCSRR Particle
CPW structure used to measure the MOCSRR particle:
M = 1.0 mm,
N = mm,
d = 1.27 mm
Duroid 6010
North Dakota State University: Applied Electromagnetics Lab

7. Modeling the MOCSRR Particle
Dimensions:
W = 10.4 mm
H = 10.4 mm
p = 0.35 mm
h = 6.4 mm
r = 3.2 mm
g = 0.6 mm
t = 0.6 mm
q = 0.3 mm
d = 3.61 mm
v = 0.6 mm
s = 1.0 mm
North Dakota State University: Applied Electromagnetics Lab

8. Modeling the MOCSRR Particle
Printed MOCSRR particle: S-parameters:
Leq = 9.25 nH
Ceq = 5.1 pF
fo = 735 MHz
OCSRR
Leq = nH
Ceq = 2.24 pF
fo = 1.0 GHz
North Dakota State University: Applied Electromagnetics Lab

9. Modeling the MOCSRR Particle
Surface currents on the
MOCSRR Particle:
North Dakota State University: Applied Electromagnetics Lab

10. Modeling the MOCSRR Particle
Properties 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
1.1
1.8
3.7
2.85
1.2
1.9
3.4
3.1
1.3
2.0
3.15
1.53
1.4
2.1
3.5
1.52
1.5
2.2
3.25
1.45
W = 8.2 mm
H = 8.2 mm
t = 0.33 mm
g = 0.31mm
North Dakota State University: Applied Electromagnetics Lab

11. 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
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

12. 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
1.4
3.0
2.37
1.6
1.8
3.25
2.35
2.0
1.7
3.05
2.2
m = 8.1 mm
n = 8.3 mm
h = 0.45 mm
g = 0.51mm
North Dakota State University: Applied Electromagnetics Lab

13. 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
2.61
0.85
3.2
2.56
0.9
1.4
3.15
2.39
0.95
3.25
2.35
1.7
3.05
2.2
North Dakota State University: Applied Electromagnetics Lab

14. North Dakota State University: Applied Electromagnetics Lab
Discussion
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)
(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
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 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
2.61
0.85
3.2
2.56
0.9
1.4
3.15
2.39
0.95
3.25
2.35
1.7
3.05
2.2
North Dakota State University: Applied Electromagnetics Lab

15. North Dakota State University: Applied Electromagnetics Lab
Discussion
Designing antennas [3]:
[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.
North Dakota State University: Applied Electromagnetics Lab

16. North Dakota State University: Applied Electromagnetics Lab
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.
North Dakota State University: Applied Electromagnetics Lab

17. Questions Thank you for listening!
North Dakota State University: Applied Electromagnetics Lab