Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
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By S. Behera and K. J. Vinoy

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This paper presents a generalized approach to design an electromagnetically coupled microstrip ring antenna for dual-band operation. By widening two opposite sides of a square ring antenna, its fractional bandwidth at the primary resonance mode can be increased significantly so that it may be used for practical applications. By attaching a stub to the inner edge of the side opposite to the feed arm, some of the losses in electrical length caused by widening can be regained. More importantly, this addition also alters the current distribution on the antenna and directs radiations at the second resonant frequency towards boresight. It has also been observed that for the dual frequency configurations studied, the ratio of the resonant frequencies (fr2/frr) can range between 1.55 and 2.01. This shows flexibility in designing dual frequency antennas with a desired pair of resonant frequencies.

S. Behera and K. J. Vinoy, "Microstrip Square Ring Antenna for Dual-Band Operation," Progress In Electromagnetics Research, Vol. 93, 41-56, 2009.

1. Garg, R., P. Bhartia, I. J. Bhal, and A. Ittipiboon, Microstrip Antenna Design Handbook, Artech House, Boston, 2001.

2. Chulvanich, C., J. Nakasuwan, N. Songthanapitak, N. Ansntrasirichai, and T. Wakabayashi, "Design of narrow slot antenna for dual frequency," PIERS Online, Vol. 3, No. 7, 1024-1028, 2007.

3. Wang, Y. J. and C. K. Lee, "Design of dual-frequency microstrip patch antennas and application for IMT-2000 mobile handsets," Progress In Electromagnetics Research, PIER 83, 265-278, 2002.

4. Shynu, S. V., G. Augustin, C. K. Anandan, P. Mohanan, and K. Vasudevan, "Design of compact reconfigurable dual frequency microstrip antennas using varactor diode," Progress In Electromagnetics Research, PIER 60, 197-205, 2008.

5. Pal, A., S. Behera, and K. J. Vinoy, "Design of multi-frequency microstrip antennas using multiple rings," IET Microwaves Antennas and Propagation, Vol. 3, 77-84, 2009.

6. Krishna, D. D., M. Gopikrishna, C. K. Aanandan, P. Mohanan, and K. Vasudevan, "Compact dual band slot loaded circular microstrip antenna with a superstrate," Progress In Electromagnetics Research, PIER 83, 245-255, 2008.

7. Song, C. T. P., P. S. Hall, and H. Ghafouri-Shiraz, "Multiband multiple ring monopole antennas," IEEE Trans. Antennas Propagation, Vol. 51, No. 4, 722-729, 2003.

8. Archevapanich, T., J. Nakasuwan, N. Songthanapitak, N. Ansntrasirichai, and T. Wakabayashi, "E-shaped slot antenna for WLAN applications," PIERS Online, Vol. 3, No. 7, 1119-1123, 2007.

9. Ren, Y. J. and K. Chang, "An annular ring antenna for UWB communications," IEEE Antennas Wireless Propagation Letters, Vol. 5, No. 1, 274-276, Dec. 2006.

10. Mayhew-Rydgers, G., J. W. Avondale, and J. Joubert, "New feeding mechanism for annular-ring microstrip antenna," Electronics Letters, Vol. 36, 605-606, 2000.

11. Nurie, N. S. and R. J. Langley, "Input impedance of concentric ring microstrip antennas for dual frequency band operation including surface wave coupling," IEE Proceedings, Vol. 137, No. 6, 331-336, Dec. 1990.

12. Misra, I. and S. K. Chowdhury, "Study of impedance and radiation properties of a concentric microstrip triangular-ring antenna and its modeling techniques using FDTD method," IEEE Trans. Antennas Propagation, Vol. 46, No. 4, 531-537, 2003.

13. Latif, S. I. and L. Shafai, "Dual-layer square-ring (DLSRA) for circular polarization," IEEE Antennas and Propagation Society International Symposium, Vol. 2A, 525-528, July 3-July 8, 2005.

14. Garg, R. and V. S. Reddy, "Edge feeding of microstrip ring antennas," IEEE Trans. Antennas Propagation, Vol. 51, No. 8, 1941-1946, 2003.

15. Bafrooei, P. M. and L. Shafai, "Characteristics of single-and double-layer microstrip square-ring antennas," IEEE Trans. Antennas Propagation, Vol. 47, No. 10, 1633-1639, 1999.

16. Behera, S. and K. J. Vinoy, "Design of dual frequency microstrip ring antennas," IEEE International Symposium on Microwaves ISM 08, 277-281, IEEE Bangalore section, Bangalore, India, Dec. 3-Dec. 6, 2008.

17. Hopkins, R. and C. Free, "Equivalent circuit for the microstrip ring resonator suitable for broadband materials characterization," IET Microwaves Antennas Propagation, Vol. 2, No. 1, 66-73, 2008.

18. Liu, X. F., Y. C. Jiao, F. S. Zhang, and Y. B. Chen, "Design of a low-profile modified U-slot microstrip antenna using PSO based on IE3D," Microwave and Optical Technology Letters, Vol. 49, No. 5, 1111-1114, May 2007.

19. Ansari, J. A. and R. B. Ram, "Analysis of broad band U-slot microstrip patch antenna," Microwave and Optical Technology Letters, Vol. 50, No. 4, 1069-1073, April 2008.

20. Mehta, A. and D. Mirshekar-Syahkal, "Pattern steerable square loop antenna," Electronics Letters, Vol. 43, Issue 9, 491-493, April26 2007.

21. Huff, G., H. Feng, J. S. Zhang, G. Cung, and J. T. Bernhard, "Directional reconfigurable antennas on laptop computers: Simulation, measurement and evaluation of candidate integration positions," IEEE Transactions on Antennas and Propagation, Vol. 52, Issue 12, 3220-3227, Dec. 2004.

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