volume | PIER Journals

Abstract

An omnidirectional dual-polarized slot antenna with high port isolation for 2.4-GHz wireless local area network (WLAN) applications is proposed in this paper. The omnidirectional radiation patterns of the vertical polarization (VP) and horizontal polarization (HP) are achieved by individually cutting two orthogonal slots onto the metal walls of a cuboid antenna. The overall volume of the compact antenna is only 60 × 10 × 10 mm³ (0.488λ₀ × 0.081λ₀ × 0.081λ₀ ). A prototype of the designed antenna is manufactured and tested. Both simulated and measured results show that the -10 dB impedance bandwidths of dual polarizations cover the desired band of 2.4-2.484 GHz and the port isolation, in the operating frequency, is less than -35 dB. Stable measured gains are greater than 2.75 and 1.35 dBi for the VP and HP, respectively.

1. Vongsack, S., C. Phongcharoenpanich, S. Kosulvit, K. Hamamoto, and T. Wakabayashi, "Unidirectional antenna using two-probe excited circular ring above square reflector for polarization diversity with high isolation," Progress In Electromagnetics Research, Vol. 133, 159-176, 2013.

2. Tu, T.-C., C.-M. Li, and C.-C. Chiu, "The performance of polarization diversity schemes in outdoor micro cells," Progress In Electromagnetics Research, Vol. 55, 175-188, 2005.
doi:10.2528/PIER04122901

3. Xu, H.-X., G.-M. Wang, and M.-Q. Qi, "A miniaturized triple-band metamaterial antenna with radiation pattern selectivity and polarization diversity," Progress In Electromagnetics Research, Vol. 137, 275-292, 2013.

4. Chung, J.-Y., "Ultra-wideband dielectric-loaded horn antenna with dual-linear polarization capability," Progress In Electromagnetics Research, Vol. 102, 397-411, 2010.
doi:10.2528/PIER10022703

5. Cao, W.-Q., B. Zhang, A. Liu, T. Yu, D. Guo, and Y. Wei, "Novel phase-shifting characteristic of CRLH TL and its application in the design of dual-band dual-mode dual-polarization antenna," Progress In Electromagnetics Research, Vol. 131, 375-390, 2012.

6. Jeon, K., B. Hui, K. Chang, H. Park, and Y. Park, "SISO polarized flat fading channel modeling for dual-polarized antenna systems," IEEE 2012 International Conference on Information Networking (ICOIN), 368-373, 2012.
doi:10.1109/ICOIN.2012.6164402

7. Molina-Garcia-Pardo, J.-M., J.-V. Rodriguez, and L. Juan-Llacer, "Polarized indoor MIMO channel measurements at 2.45 GHz," IEEE Transactions on Antennas and Propagation, Vol. 56, No. 12, 3818-3828, 2008.
doi:10.1109/TAP.2008.2005542

8. Valenzuela-Valdes, J. F., et al., "Evaluation of true polarization diversity for MIMO systems," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 9, 2746-2755, 2009.
doi:10.1109/TAP.2009.2027042

9. Konanur, A. S., et al., "Increasing wireless channel capacity through MIMO systems employing co-located antennas," IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 6, 1837-1844, 2005.
doi:10.1109/TMTT.2005.848105

10. Wong, H., K.-L. Lau, and K.-M. Luk, "Design of dual-polarized L-probe patch antenna arrays with high isolation," IEEE Transactions on Antennas and Propagation, Vol. 52, No. 1, 45-52, 2004.
doi:10.1109/TAP.2003.822402

11. Guo, Y.-X., K.-W. Khoo, and L. C. Ong, "Wideband dual-polarized patch antenna with broadband baluns," IEEE Transactions on Antennas and Propagation, Vol. 55, No. 1, 78-83, 2007.
doi:10.1109/TAP.2006.888398

12. Li, Y., et al., "A dual-polarization slot antenna using a compact CPW feeding structure," IEEE Antennas and Wireless Propagation Letters, 191-194, 2010.
doi:10.1109/LAWP.2010.2044865

13. Soliman, E. A., M. S. Ibrahim, and A. K. Abdelmageed, "Dual-polarized omnidirectional planar slot antenna for WLAN applications," IEEE Transactions on Antennas and Propagation, Vol. 53, No. 9, 3093-3097, 2005.
doi:10.1109/TAP.2005.854544

14. Bancroft, R. and B. Bateman, "An omnidirectional planar microstrip antenna," IEEE Transactions on Antennas and Propagation, Vol. 52, No. 11, 3151-3154, 2004.
doi:10.1109/TAP.2004.832338

15. Wong, K.-L., F.-R. Hsiao, and T.-W. Chiou, "Omnidirectional planar dipole array antenna," IEEE Transactions on Antennas and Propagation, Vol. 52, No. 2, 624-628, 2004.
doi:10.1109/TAP.2004.823897

16. Borja, A. L., et al., "Omnidirectional loop antenna with left-handed loading," IEEE Antennas and Wireless Propagation Letters, Vol. 6, 495-498, 2007.
doi:10.1109/LAWP.2007.905016

17. 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 and Wireless Propagation Letters, Vol. 8, 966-969, 2009.

18. Kuga, N., H. Arai, and N. Goto, "A notch-wire composite antenna for polarization diversity reception," IEEE Transactions on Antennas and Propagation, Vol. 46, No. 6, 902-906, 1998.
doi:10.1109/8.686779

19. Soliman, E. A., M. S. Ibrahim, and A. K. Abdelmageed, "Dual-polarized omnidirectional planar slot antenna for WLAN applications," IEEE Transactions on Antennas and Propagation, Vol. 53, No. 9, 3093-3097, 2005.
doi:10.1109/TAP.2005.854544

20. 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 Transactions on Vehicular Technology, Vol. 57, No. 1, 2-10, 2008.
doi:10.1109/TVT.2007.905432

21. Manna, A., P. Baldonero, and F. Trotta, "Novel UWB low-profile sinuous slot antenna," IEEE Proceedings of the 5th European Conference on Antennas and Propagation (EUCAP), 783-786, 2011.

Prof. Ying Liu

Dr. Jinyang Xue

Dr. Yu Cao

Prof. Shu-Xi Gong