volume | PIER Journals

Abstract

This paper presents a conical monopole antenna with two C-shaped slots to provide a frequency stopband to suppress interference. Compared to previous work reported in the literature, the antenna provides increased gain suppression to vertically polarised signals within the notch-band of up to 41.5 dB in four specific directions. It also yields omni-directional radiation patterns at frequencies throughout the operating band, outside the rejection band. The four null directions in vertically polarised plane at the notched band frequency are explained by an analysis of simplified equivalent current sources. The effect of different length of slots has been investigated. Two methods to control the stop band directions are also discussed.

1. Palud, S., F. Colombel, M. Himdi, and C. Le Meins, , "Compact multi-octave conical antenna," Electronics Letters,, Vol. 44, , 659-661, 2008.
doi:10.1049/el:20080231 Google Scholar

2. Wei, , C., Z. Shen, and , "Design of a compact and broadband conical monopole antenna," IEEE Antennas and Propagation Society International Symposium, APSURSI'09, , 1-4, , Jun. 2009. Google Scholar

3. Palud, , S., F. Colobel, M. Himdi, and C. Le Meins, , "A novel broadband eighth-wave conical antenna," IEEE Transactions on Antennas and Propagation, Vol. 56, 2112-2116, , 2008.
doi:10.1109/TAP.2008.924775 Google Scholar

4. Hu, Z. H., P. S. Hall, J. R. Kelly, and P. Gardner, "Wideband conical monopole antenna with frequency band notched behaviour," Electronics Letters, Vol. 46, No. 23, , 1542-1543, 2010.
doi:10.1049/el.2010.2441 Google Scholar

5. "IEEE 802.22 Wireless Regional Area Networks --- Enabling Rural Broadband Wireless Access Using Cognitive Radio Technology," IEEE 802.22-10/0073r03, , Jun. 2010. Google Scholar

6. Nikolaou, , S., B. Kim, Y.-S. Kim, J. Papapolymerou, and M. M. Tentzeris, "CPW-fed ultra wideband (UWB) monopoles with band rejection characteristic on ultra thin organic substrate ," Proceedings of APMC 2006, CD-Rom: FROF-26, , Dec. 2006. Google Scholar

7. Antonino-Daviu, , E., M. Cabedo-Fabres, M. Ferrando-Bataller and A. Vila-Jimenez, "Active UWB antenna with tunable band-notched behaviour ," Electronics Letters, Vol. 43, No. 18, , 959-960, 2007.
doi:10.1049/el:20071567 Google Scholar

8. Zheng, , Z.-A., Q.-X. Chu, and , "A CPW-fed ultrawideband antenna with dual notched bands," IEEE International Conference on Ultra-wideband, ICUWB, 645-648, 2009.
doi:10.1109/ICUWB.2009.5288678 Google Scholar

9. Pancera, E., D. Modotto, A. Locatelli, F. M. Pigozzo, and C. de Angelis, "Novel design of UWB antenna with band-notch capability," European Conference on Wireless Technologies, 48-50, 2007.
doi:10.1109/ECWT.2007.4403942 Google Scholar

10. Jiang, , J.-B., Z.-H. Yan, and C. Wang, "A novel compact UWB notch-filter antenna with a dual-Y-shaped slot," Progress In Electromagnetics Research Letters, Vol. 14, 165-170, 2010..
doi:10.2528/PIERL10012108 Google Scholar

11. Zhang, Y., W. Hong, C. Yu, Z.-Q. Kuai, Y.-D. Don, and J.-Y. Zhou, "Planar ultrawideband antennas with multiple notched bands based on etched slots on the patch and/or split ring resonators on the feed line ," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 9, 3063-3068, , 2008.
doi:10.1109/TAP.2008.928815 Google Scholar

12. Weng, Y. F., W. S. Cheung, and T. I. Yuk, , "Ultrawideband an-tenna using CPW resonators for dual-band notched characteristic," International Conference on Wireless Communications & Signal Processing, 1-4, 2009 . Google Scholar

13. Weng, , Y. F., W. J. Lu, S. W. Cheung, and T. I. Yuk, "UWB antenna with single or dual band-notched characteristic for WLAN band using meandered ground stubs," Antennas & Propagation Conference,, 757-760, 2009.
doi:10.1109/LAPC.2009.5352396 Google Scholar

14. Kelly, , J., P. S. Hall, and P. Gardner, , "Planar band-notched UWB antenna," 3rd European Conference on Antennas and Propagation, 1636-1639, 2009. Google Scholar

15. Ghatak, , R., R. Debnath, D. R. Poddar, P. K. Mishra, and S. Chaudhuri, "A CPW fed planar monopole band notched UWB antenna with embedded split ring resonators ," Antennas & Propagation Conference, 645-647, , 2009.
doi:10.1109/LAPC.2009.5352536 Google Scholar

16. Lui, W.-J., C.-H. Cheng, and H.-B. Zhu, , "Improved frequency notched ultrawideband slot antenna using square ring resonator," IEEE Antennas and Propag., Vol. 55, No. 9, 2445-2450, , 2007..
doi:10.1109/TAP.2007.904090 Google Scholar

17. Nikolaou, S., A. Amadjikpe, J. Papapolymerou, and M. M. Tentzeris "Compact ultra wideband (UWB) ellipti-cal monopole with potentially reconfigurable band rejection characteristic," Proceedings of APMC, 1-4, , 2007.. Google Scholar

18. Hu, , Z. H., P. S. Hall, J. R. Kelly, and P. Gardner, "Wideband omni conical monopole antenna with high Q band-notched behaviour," The International Workshop on Antenna Technology, 37-40, 2011.
doi:10.1109/IWAT.2011.5752357 Google Scholar

19. Hu, , Z. H., P. S. Hall, J. R. Kelly, and P. Gardner, "Improved band-notched wideband conical monopole antenna," Microwave and Optical Technology Letters, Vol. 53, No. 8, , 1825-1829, May 17, 2011.
doi:10.1002/mop.26132 Google Scholar

20. Kawakami, , H., G. Sato, and , "Broad-band characteristics of rotationally symmetric antennas and thin wire constructs," IEEE Transactions on Antennas and Propagation, Vol. 35, No. 1, 26-32, Jan. 1987.
doi:10.1109/TAP.1987.1143967 Google Scholar

21. Jamali, J., N. Tayarzade, and R. Moini, "Analyzing of conical antenna as an ultra-wideband antenna using finite difference time domain method," International Conference on Electromagnetics in Advanced Applications, , 994-997, , 2007.
doi:10.1109/ICEAA.2007.4387474 Google Scholar

22. Adachi, , S., R. Kouyoumjian, and R. van Sickle, "The finite conical antenna," IRE Transactions on Antennas and Propagation,, Vol. 7, 406-411, , 1959.
doi:10.1109/TAP.1959.1144714 Google Scholar

23. Arai, , H., , Measurement of Mobile Antenna Systems,, 42-43, Artech House, , 2001.
doi: ISBN 1-58053-065-6

24. Balanis, , C. A., , Antenna Theory: Analysis and Design,, 3rd Ed., 349-362, , John Wiley & Sons, , 2005..

25. Hu, , Z. H., P. S. Hall, J. R. Kelly, and P. Gardner, , "UWB pyramidal monopole antenna with wide tunable band-notched behaviour," Electronic Letters, Vol. 46, No. 24, , 1588-1590, , 2010.
doi:10.1049/el.2010.2839 Google Scholar

Dr. Zhen Hua Hu

Dr. James Robert Kelly

Dr. Peter S. Hall

Dr. Peter Gardner