volume | PIER Journals

Abstract

A compact stacked Yagi antenna is proposed with bandwidth enhancement in this paper. To reduce the size of the antenna and simultaneously improve the front-to-back ratio (FTBR), a reflector, modified with six slots, two λ0/4 meanderline-shaped slots and four straight short slots, is employed. Furthermore, a ladder-like director is designed to overcome the mismatch loss caused by the diminution of the height between the reflector and driven dipole. As shown in both simulation and measurement, the proposed compact Yagi antenna can achieve a compact size of 0.55λ0×0.55λ0×0.08λ0, |S11| ≤ -10 dB bandwidth of 17.2% and an FTBR of 22dB at 2.2GHz. The acceptable results make the proposed Yagi antenna a good candidate for applications where compact size and wide bandwidth are needed.

1. Kramer, O., T. Djerafi, and K. Wu, "Very small footprint 60 GHz stacked Yagi antenna array," IEEE Trans. Antennas Propag., Vol. 59, No. 9, 3204-3210, Sep. 2011.
doi:10.1109/TAP.2011.2161562 Google Scholar

2. Chen, Z. N., Y. Juan, X. M. Qing, and W. Q. Che, "Enhanced radiation from a horizontal dipole closely placed above a PEC ground plane using a parasitic strip," IEEE Trans. Antennas Propag., Vol. 64, No. 11, 4868-4871, Nov. 2016.
doi:10.1109/TAP.2016.2594842 Google Scholar

3. Piersanti, S., F. D. Paulis, A. Orlandi, S. Connor, B. Archambeault, P. Dixon, M. A Khorrami, and J. L. Drewniak, "Electric dipole equations in very-near-field conditions for electromagnetic shielding assessment --- Part II: wave impedance, reflection, and transmission," IEEE Trans. Electromagn. Compat., Vol. 59, No. 4, 1203-1209, Aug. 2017.
doi:10.1109/TEMC.2017.2674183 Google Scholar

4. Yuan, B. and X. Wang, "Multi-objective optimization of double-folded Yagi antenna using genetic algorithms," Proc. Computational Intelligence and Software Engineering Conf., Dec. 2010. Google Scholar

5. Liu, H., Y. Liu, and S. X. Gong, "A novel dual-polarized slot Yagi-Uda array antenna with high gain and low profile," Proc. International Workshop on Electromagnetics: Applications and Student Innovation Competition, May 2016. Google Scholar

6. Wang, Q. Q., Z. P. Qian, W. Q. Cao, Y. S. Zhang, and K. Li, "60 GHz stacked Yagi magneto-electric dipole antenna with wideband and high gain properties," Proc. Communication Problem-Solving Conf., 454-457, Oct. 2015. Google Scholar

7. McMichael, I. T., A. I. Zaghloul, and M. S. Mirotznik, "A method for determining optimal EBG reflection phase for low profile dipole antennas," IEEE Trans. Antennas Propag., Vol. 61, No. 5, 2411-2417, May 2013.
doi:10.1109/TAP.2013.2244552 Google Scholar

8. Best, S. R. and D. L. Hanna, "Design of a broadband dipole in close proximity to an EBG ground plane," IEEE Antennas Propag. Mag., Vol. 50, No. 6, 52-64, Dec. 2008.
doi:10.1109/MAP.2008.4768923 Google Scholar

9. Huang, Y., A. De, Y. Zhang, T. K. Sarkar, and J. Carlo, "Enhancement of radiation along the ground plane from a horizontal dipole located close to it," IEEE Antennas Wireless Propag. Lett., Vol. 7, 294-297, 2008.
doi:10.1109/LAWP.2008.922141 Google Scholar

10. Lim, W. G., H. S. Jang, and J. W. Yu, "New method for back lobe suppression of microstrip patch antenna for GPS," Proc. 40th Eur. Microw. Conf., 679-682, Sep. 2010. Google Scholar

11. Tang, M. Ch. and R. W. Ziolkowski, "Efficient, high directivity, large front-to-back-ratio, electrically small, near-field-resonant-parasitic antenna," IEEE Access, Vol. 1, 16-28, 2008. Google Scholar

12. Lu, L., K. X. Ma, F. Y. Meng, and K. S. Yeo, "Design of a 60-GHz Quasi-Yagi antenna with novel ladder-like directors for gain and bandwidth enhancements," IEEE Antennas Wireless Propag. Lett., Vol. 15, 682-685, 2016.
doi:10.1109/LAWP.2015.2469139 Google Scholar

Dr. Li Jiang

Dr. Fu-Shun Zhang

Dr. Fan Zhang