volume | PIER Journals

Abstract

A novel horizontally polarized (HP) antenna with omnidirectional pattern is presented in this paper. The proposed antenna applies the concept of rotating electric field method to conventional slot dipoles. Two CPW-fed slot dipoles are placed in a perpendicularly conjugate form. By properly arranging the magnitude and phase of input signals, the omnidirectional pattern can be synthesized at broadside. A prototype is developed at the 2.6 GHz band, which offers a horizontally polarized omnidirectional radiation pattern with gain of 2.5-3.4 dBi, and the measured antenna efficiency is greater than 73% through the operating band (2.4-2.8 GHz). Furthermore, a 20-dB polarization purity is achieved in this design. The overall volume of the proposed antenna is 22×22×90 mm³ (0.19λ₀×0.19λ₀×0.78λ₀). Distinct from the other proposed HP antennas provided with planar geometry, this antenna is slim in shape, and it can be readily integrated with vertical dipoles to form a polarization diversity system in current wireless router and AP applications.

1. Vaughan, R. G., "Polarization diversity in mobile communications," IEEE Trans. Veh. Technol., Vol. 39, No. 3, 177-186, 1990.
doi:10.1109/25.130998

2. Balanis, C. A., "Antenna Theory: Analysis and Design," John Wiley & Sons, 2012.

3. Alford, A. and A. G. Kandoian, "Ultrahigh-frequency loop antennas," Trans. AIEE, Vol. 59, No. 12, 843-848, 1940.

4. Lin, C.-C., L.-C. Kuo, and H.-R. Chuang, "A horizontally polarized omnidirectional printed antenna for WLAN applications," IEEE Trans. Antennas Propag., Vol. 54, No. 11, 3551-3556, 2006.
doi:10.1109/TAP.2006.884307

5. Ahn, C.-H., S.-W. Oh, and K. Chang, "A dual-frequency omnidirectional antenna for polarization diversity of mimo and wireless communication applications," IEEE Antennas Wireless Propag. Lett., Vol. 8, 966-969, 2009.

6. Wu, B. Q. and K.-M. Luk, "A wideband low-profile conical beam antenna with horizontal polarization," Asia Paci¯c Microwave Conference, 1806-1808, 2009.

7. Zhang, G., H. Zhang, Z. Yuan, Z. Wang, and D. Wang, "A novel broadband E-plane omni-directional planar antenna," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 5-6, 663-670, 2010.
doi:10.1163/156939310791036296

8. Quan, X. L., R. L. Li, J. Y. Wang, and Y. H. Cui, "Development of a broadband horizontally polarized omnidirectional planar antenna and its array for base stations," Progress In Electromagnetics Research, Vol. 128, 441-456, 2012.
doi:10.2528/PIER12042405

9. Wei, K., Z. Zhang, and Z. Feng, "Design of a wideband horizontally polarized omnidirectional printed loop antenna," IEEE Antennas Wireless Propag. Lett., Vol. 11, 49-52, 2012.

10. Yu, Y., F. Jolani, and Z. Chen, "A wideband omnidirectional horizontally polarized antenna for 4G LTE applications," IEEE Antennas Wireless Propag. Lett., Vol. 12, 686-689, 2013.
doi:10.1109/LAWP.2013.2264545

11. Kawakami, H., G. Sato, and R. Masters, "Characteristics of TV transmitting batwing antennas," IEEE Trans. Antennas Propag., Vol. 32, No. 12, 1318-1326, 1984.
doi:10.1109/TAP.1984.1143266

12. Radnovic, I., A. Nesic, and B. Milovanovic, "A new type of turnstile antenna," IEEE Antennas Propag. Mag., Vol. 52, No. 5, 168-171, 2010.
doi:10.1109/MAP.2010.5687522

13. Ando, A., K. Cho, and T. Hori, "Dielectric-loaded slotted-cylinder antennas offering reduced base station interference for personal communication services," Antennas and Propagation Society International Symposium, Vol. 3, 1454-1457, 1998.

14. Ando, A., A. Kondo, and S. Kubota, "A study of radio zone length of dual-polarized omnidirectional antennas mounted on rooftop for personal handy-phone system," IEEE Trans. Veh. Technol., Vol. 57, No. 1, 2-10, 2008.
doi:10.1109/TVT.2007.905432

15. Li, Y., Z. Zhang, J. Zheng, and Z. Feng, "Compact azimuthal omnidirectional dual-polarized antenna using highly isolated colocated slots," IEEE Trans. Antennas Propag., Vol. 60, No. 9, 4037-4045, 2012.
doi:10.1109/TAP.2012.2207072

16. Fenn, A., "Arrays of horizontally polarized loop-fed slotted cylinder antennas," IEEE Trans. Antennas Propag., Vol. 33, No. 4, 375-382, 1985.
doi:10.1109/TAP.1985.1143597

17. Brown, G. H., "Antenna system,", U. S. Patent 2,432,858, Dec. 1947.

18. Amin, M., R. Cahill, and V. Fusco, "Single feed low profile omnidirectional antenna with slant 45^o linear polarization," IEEE Trans. Antennas Propag., Vol. 55, 3087-3090, 2007.
doi:10.1109/TAP.2007.908568

19. Amin, M., J. Yousaf, and S. Iqbal, "Single feed circularly polarised omnidirectional bifilar helix antennas with wide axial ratio beamwidth," IET Microw. Antennas Propag., Vol. 7, 825-830, 2013.
doi:10.1049/iet-map.2012.0630

20. Yousaf, J., M. Amin, and S. Iqbal, Design of circularly polarized omnidirectional bifilar helix antennas with optimum wide axial ratio beamwidth, Vol. 39, 119-132, Progress In Electromagnetics Research C, 2013.

Dr. Cheng-Yuan Chin

Dr. Christina F. Jou