Progress In Electromagnetics Research B
ISSN: 1937-6472
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 4 > pp. 147-158


By J. A. Ansari, R. B. Ram, and P. Singh

Full Article PDF (453 KB)

A theoretical analysis of a gap-coupled stacked annular ringmicrostrip antenna with superstrate is performed in order to obtain wider bandwidth operation. The effects of air gap, superstrate thickness and feedingp oint location on the antenna performance are analyzed in TM11 mode usingequiv alent circuit concept. It is noted that the proposed antenna is very sensitive to the feedingp oint location in TM11 mode while annular ringmicrostrip patch antenna is independent of feed point in that mode. The optimized proposed antenna shows an impedance bandwidth of 13.96% whereas the antenna without air-gap has 8.75% bandwidth and without superstrate it has bandwidth of 10.89%. The theoretical results are compared with simulated and experimental results.

J. A. Ansari, R. B. Ram, and P. Singh, "Analysis of a Gap-Coupled Stacked Annular Ring Microstrip Antenna," Progress In Electromagnetics Research B, Vol. 4, 147-158, 2008.

1. Dahele, J. S. and K. F. Lee, "Characteristics of annular ring microstrip antenna," Electronics Letters, Vol. 18, No. 24, 1051-1052, 1982.

2. Liu, H. and X. F. Hu, "Input impedance analysis of microstrip annular ringan tenna with thick substrate," Progress In Electromagnetics Research, Vol. 12, 177-204, 1996.

3. Lee, K. F. and J. S. Dahele, "Two layered annular ring microstrip antenna," International Journal of Electronics, Vol. 61, No. 2, 207-217, 1986.

4. Fan, Z. and K. F. Lee, "Input impedance annular ring microstrip antennas with dielectric cover," IEEE Trans. Antenna Propagat., Vol. 40, No. 8, 992-995, 1992.

5. Al-Charchafchi, S. H., W. K. W. Ali, and S. Sinkeree, "A stacked annular ring microstrip patch antenna," IEEE Antenna Propag. Society Int. Symp., Vol. 2, 948-951, 1997.

6. Misra, S. and S. K. Chowdhury, "Concentric microstrip ring antenna: Theory and experiment," Journal of Electromagnetic Waves and Applications, Vol. 10, No. 3, 439-450, 1996.

7. Garcia, Q. G., Broadband attacked annular ring, IEE Antenna and Propogation Conference, No. 407, 508-512, 1995.

8. Ansari, J. A., R. B. Ram, S. K. Dubey, and P. Singh, "A frequency agile stacked annular ring microstrip antenna using a Gunn diode," Smart Materials and Structures, Vol. 16, 2040-2045, 2007.

9. Liu, Z. F., P. S. Kooi, L. W. Li, M. S. Leong, and T. S. Yeo, "A method for designing broad-band microstrip antennas in multilayered planar structures," IEEE Trans. Antenna Propagat., Vol. 47, No. 9, 1416-1420, 1999.

10. Garg, R., P. Bhartia, I. Bahl, and A. Ittipiboon, Microstrip Antenna Design Handbook, Artech House, Norwood, MA, 2001.

11. Derneryd, A. G., "Analysis of the microstrip disc antenna element," IEEE Trans. Antenna Propagat., Vol. 27, No. 5, 660-664, 1979.

12. Bahl, I. J. and P. Bhartia, Microstrip Antenna, Artech House, Bostan, MA, USA, 1980.

13. Lee, K. F. and J. S. Dahele, "Theory and experiment on the annular ringmicrostrip antenna," Ann. Telecomm., Vol. 40, No. 9, 508-515, 1985.

© Copyright 2010 EMW Publishing. All Rights Reserved