paper 150126041129

Abstract

Utilization of the equivalent circuit model has shown more time-effective for design- ing RF circuits and antennas rather than Electromagnetic fields analysis. This study investigates equivalent circuit perspective on designing the resonant antenna. An equivalent π-network circuit is firstly proposed to approach the electromagnetic fields coupling of a closely coupled two-element diversity antenna. Thus, the improvement on the isolation between antennae can be straightfor- ward achieved by employing resonant method. Numerical and experimental study are presented herein.

1. Hu, C. N., B. Tai, and A. Yang, "Meander-line folded monopole design for UMTS/HSDPA-based data-card applications," IEEE Antennas and Wireless Propagation Letters, Vol. 7, 279-282, 2008.
doi:10.1109/lawp.2008.928472 Google Scholar

2. Hu, C.-N., "Diversity antenna design for use in UMTS/HSPA-based data-cards," IET Microwaves, Antennas & Propagation, Vol. 4, No. 9, 1191-1198, 2010.
doi:10.1049/iet-map.2009.0340 Google Scholar

3. Vaughan, R. G. and J. Bach Andersen, "Antenna diversity in mobile communications," IEEE Trans. on Vehicular Tech., Vol. 36, No. 4, 149-172, 1987.
doi:10.1109/t-vt.1987.24115 Google Scholar

4. Wu, T.-Y., S.-T. Fang, and K.-L. Wong, "A printed diversity dual-band monopole antenna for WLAN operation in the 2.4 and 5.2 GHz band," Microwave and Optical Technology Letters, Vol. 36, No. 6, 2003.
doi:10.1002/mop.10784 Google Scholar

5. Fhi, G., B. Li, and D. Qi, "Dual band printed diversity antenna for 2.4/5.2 GHz WLAN application," Microwave and Optical Technology Letters, Vol. 45, No. 6, 2005. Google Scholar

6. Gao, Y., C. C. Chiau, X. Chen, and C. G. Parini, "Modified PIFA and its array for MIMO terminals," IEE Proc. Microwaves, Antennas and Propagation, Vol. 152, No. 4, 255-259, 2005.
doi:10.1049/ip-map:20045180 Google Scholar

7. Karaboikis, M., C. Soras, G. Tsachtsiris, and V. Makios, "Compact dual-printed inverted-F antenna diversity system for portable wireless devices," IEEE Antennas and Wireless Propagation Letters, Vol. 3, 9-14, 2004.
doi:10.1109/lawp.2004.825106 Google Scholar

8. Kim, K.-J., W.-G. Lim, and J.-W. Yu, "High isolation internal dual-band planar inverted-F antenna diversity system with band-notched slots for MIMO terminals," 36th European Microwave Conference, 10-15, 2006.
doi:10.1109/eumc.2006.281302 Google Scholar

9. Chiau, C. C., "Study of the diversity antenna array for the MIMO wireless communication systems," Department of Electric Engineering, University of London, Queen Mary, UK, 2006. Google Scholar

Jen-Kai Hong

Cheng-Nan Hu

Siam-Chen Huang

Jhih-Neng Yang