volume | PIER Journals

Abstract

In this article, design and analysis of a modified circular slot antenna is discussed. The proposed antenna design is attractive because of two important reasons: (i) modified circular slot creates dual operating bands; (ii) stable radiation characteristics over the operating frequency bands. The complete analysis of proposed radiator has been done on Ansys HFSS simulation software. For verifying the simulated outcomes, a prototype of antenna structure is fabricated and tested. Measured results show that the proposed antenna operates over two frequency bands i.e., 2.88-3.92 GHz and 5.26-6.28 GHz with the fractional bandwidths of 31% and 17% respectively. Experimentally measured average gain of the proposed radiator is 3 dBi and 6 dBi in lower and upper frequency bands, respectively. All these features of the proposed antenna make it appropriate for WiMAX (3.5 GHz) and WLAN (5.8 GHz) applications.

1. Balanis, C. A., Antenna Theory, Analysis and Design, John Wiley & Sons, 2005.

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

3. James, J. R. and P. S. Hall, Handbook of Microstrip Antennas, Peter Peregrines, 1989.

4. Yang, K. P. and K. L. Wong, "Inclined-slot-coupled compact dual-frequency microstrip antenna with cross slot," Electronics Letters, Vol. 34, No. 4, 321-322, Feb. 1998.
doi:10.1049/el:19980222

5. Chen, H. D., "dual-frequency rectangular microstrip antenna with a circular slot," Microwave and Optical Technology Letters, Vol. 18, No. 2, 130-132, Dec. 1998.
doi:10.1002/(SICI)1098-2760(19980605)18:2<130::AID-MOP13>3.0.CO;2-B

6. Chen, W. S., "Single-feed dual-frequency rectangular microstrip antenna with square slot," Electronics Letters, Vol. 34, No. 3, 231-232, Feb. 1998.
doi:10.1049/el:19980140

7. Lu, J. H. and W. L. Wong, "Compact dual-frequency circular microstrip antenna with an offset circular slot," Microwave and Optical Technology Letters, Vol. 22, No. 4, 254-256, Aug. 1999.
doi:10.1002/(SICI)1098-2760(19990820)22:4<254::AID-MOP11>3.0.CO;2-S

8. Tiang, J. J., M. T. Islam, N. Misran, and J. S. Mandeep, "Circular microstrip slot antenna for dual-frequency RFID application," Progress In Electromagnetics Research, Vol. 120, 499-512, Oct. 2011.

9. Yang, Y. H., J.-L. Guo, B.-H. Sun, and Y.-H. Huang, "Dual-band slot helix antenna for global positioning satellite applications," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 12, 5146-5152, Dec. 2016.
doi:10.1109/TAP.2016.2623647

10. Hung, C. and T. Chiu, "Design of dual-band cavity-backed slot antenna loaded with spurline," IET Microwaves, Antennas and Propagation, Vol. 10, No. 9, 939-946, Jun. 2016.
doi:10.1049/iet-map.2015.0682

11. Kandasamy, K., B. Majumder, J. Mukherjee, and K. P. Ray, "Dual-band circularly polarized split ring resonators loaded square slot antenna," IEEE Transactions on Antennas and Propagation, Vol. 64, No. 8, 3640-3645, May 2016.
doi:10.1109/TAP.2016.2565729

12. Rui, X., J. Li, and K. Wei, "Dual-band dual-sense circularly polarised square slot antenna with simple structure," Electronics Letters, Vol. 52, No. 8, 578-580, Apr. 2016.
doi:10.1049/el.2015.4499

Prof. Som Pal Gangwar

Mr. Kapil Gangwar

Dr. Arun Kumar