volume | PIER Journals

Abstract

This paper presents a broadband planar printed antenna comprising two dipoles with different lengths and a transition structure of microstrip (MS) to coplanar stripline (CPS). These two dipoles are serially connected through CPS. By adding trapezoid and stepped patches, the dipole elements are modified for enhancing the impedance matching of the antenna. In addition, a tapered transition is adopted in the CPS to achieve improved impedance matching. The current work shows a good agreement between measured and simulated results. The measured bandwidth is from 2.43 to 8.04 GHz for VSWR≤2, corresponding to 107.2% fractional bandwidth. Measured peak gain≥4.0 dBi is obtained in the whole operating band.

1. Bilgic, M. M. and K. Yegin, "Wideband offset slot-coupled patch antenna array for X/Ku-band multimode radars," IEEE Antennas Wireless Propag. Lett., Vol. 13, 157-160, 2014.
doi:10.1109/LAWP.2013.2296911

2. Huang, H. C., J. C. Lu, and P. Hsu, "A compact dual-band printed Yagi-Uda antenna for GNSS and CMMB applications," IEEE Trans. Antennas Propag., Vol. 63, No. 5, 2342-2348, 2015.
doi:10.1109/TAP.2015.2406914

3. Jehangir, S. S. and M. S. Sharawi, "A single layer semi-ring slot Yagi-like MIMO antenna system with high front-to-back ratio," IEEE Trans. Antennas Propag., Vol. 65, No. 2, 937-942, 2017.
doi:10.1109/TAP.2016.2633938

4. Kan, H. K., R. B. Waterhouse, A. M. Abbosh, and M. E. Bialkowski, "Simple broadband planar CPW-fed quasi-Yagi antenna," IEEE Antennas Wireless Propag. Lett., Vol. 6, 18-20, 2007.
doi:10.1109/LAWP.2006.890751

5. Rezaeieh, S. A., M. A. Antoniades, and A. M. Abbosh, "Miniaturized planar Yagi antenna utilizing capacitively coupled folded reflector," IEEE Antennas Wireless Propag. Lett., Vol. 16, 1977-1980, 2017.
doi:10.1109/LAWP.2017.2690973

6. Wang, H., Y. Chen, F. Liu, and X. Shi, "Wideband and compact quasi-Yagi antenna with bowtie-shaped drivers," Electron. Lett., Vol. 49, No. 20, 1262-1264, 2013.
doi:10.1049/el.2013.2454

7. Abbosh, A., "Ultra-wideband quasi-Yagi antenna using dual-resonant driver and integrated balun of stepped impedance," IEEE Trans. Antennas Propag., Vol. 61, No. 7, 3885-3888, 2013.
doi:10.1109/TAP.2013.2257642

8. Nguyen, P. T., A. Abbosh, and S. Crozier, "Wideband and compact quasi-Yagi antenna integrated with balun of microstrip to slotline transitions," Electron. Lett., Vol. 49, No. 2, 88-89, 2013.
doi:10.1049/el.2012.3192

9. Yeo, J. and J. I. Lee, "Broadband series-fed two dipole array antenna with an integrated balun for mobile communication applications," Microw. Opt. Tech. Lett., Vol. 54, No. 9, 2166-2168, 2012.
doi:10.1002/mop.27009

10. Yeo, J. and J. I. Lee, "Modified series-fed two-dipole-array antenna with reduced size," IEEE Antennas Wireless Propag. Lett., Vol. 12, 214-217, 2013.
doi:10.1109/LAWP.2013.2245297

11. Yeo, J. and J. I. Lee, "Bandwidth enhancement of double-dipole quasi-Yagi antenna using stepped slotline structure," IEEE Antennas Wireless Propag. Lett., Vol. 15, 694-697, 2016.
doi:10.1109/LAWP.2015.2469677

Dr. Yu-Chun Guo

Dr. Lei Chang

Dr. Jian-Qiang Zhang

Dr. Xiao Long Yang