A high-gain and broadband printed Yagi-Uda antenna is proposed. The microstripline-to-balance microstripline technique is adopted in the feeding mode of the active dipole, which can help to realize the balanced-unbalanced transformation. The ground of the microstrip feeding line can function as a reflector, and both the longer reflector and the shorter director can also help the antenna achieve wideband. By altering the area of the substrate, the antenna gain can be effectively improved. A printed Yagi-Uda antenna operating at 3.5 GHz has been designed and manufactured. Both the simulated and measured results indicate that there is a high positive correlation between antenna gain and the substrate area extended from the front of the director, and antenna broadband characteristic would not be changed at the same time. Moreover, the impedance bandwidth of the proposed antenna can achieve 27.4%, and the maximum gain in the operating band can reach 10.6 dBi.
2. Thomas, K. G. and M. Sreenivasan, "A simple ultrawideband planar rectangular printed antenna with band dispensation," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 1, 27-34, January 2010.
doi:10.1109/TAP.2009.2036279
3. Kelly, J. R. , P. S. Hall, P. Gardner, and F. Ghanem, "Integrated narrow/band-notched UWB antenna," Electronics Letters, Vol. 46, No. 12, 814-816, June 10, 2010.
doi:10.1049/el.2010.3368
4. Hu, Y.-S., M. Li, G.-P. Gao, J.-S. Zhang, and M.-K. Yang, "A double-printed trapezoidal patch dipole antenna for uwb applications with band-notched characteristic," Progress In Electromagnetics Research, Vol. 103, 259-269, 2010.
doi:10.2528/PIER10011604
5. Eldek, A. A., A. Z. Elsherbeni, and C. E. Smith, "Dual-wideband square slot antenna with a U-shaped printed tuning stub for personal wireless communication systems," Progress In Electromagnetics Research, Vol. 53, 319-333, 2005.
doi:10.2528/PIER04103001
6. Locatelli, A., D. Modotto, F. M. Pigozzo, S. Boscolo, C. De Angelis, A.-D. Capobianco, and M. Midrio, "A planar, differential, and directive ultrawideband antenna," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 7, 2439-2442, 2010.
doi:10.1109/TAP.2010.2048870
7. Li, J. Y., "Design of broadband compact size antenna comprised of printed planar dipole pairs," Progress In Electromagnetics Research Letters, Vol. 12, 99-109, 2009.
8. Ranga, Y., A. K. Verma, and K. P. Esselle, "Planar-monopole-fed, surface-mounted quasi-TEMhorn antenna for UWB systems," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 7, 2436-2439, July 2010.
doi:10.1109/TAP.2010.2048843
9. Abbosh, A. M., "Miniaturized microstrip-fed tapered-slot antenna with ultrawideband performance," IEEE Antennas and Wireless Propagation Letters, Vol. 8, 690-692, 2009.
doi:10.1109/LAWP.2009.2025613
10. Anagnostou, , D. E., , J. Papapolymerou, M. M. Tentzeris, and C. G. Christodoulou, "A printed log-periodic Koch-dipole array (LPKDA)," IEEE Antennas and Wireless Propagation Letters, Vol. 7, 456-460, 2008.
doi:10.1109/LAWP.2008.2001765
11. Wu, Q., R. Jin, J. Geng, "A single-layer ultrawideband microstrip antenna," IEEE Transactions on Antennas and Propagation, Vol. 58, No. 1, 211-214, January 2010.
doi:10.1109/TAP.2009.2027728
12. Avila Navarro, E., J. M. Blanes, J. A. Carrasco, and C. Reig, "Yagi-like printed antennas for wireless sensor networks," 2007 International Conference on Sensor Technologies and Applications,, 254-259, 2007.
doi:10.1109/SENSORCOMM.2007.4394930
13. Zhai, G., W. Hong, K. Wu, and Z. Kuai, "Printed quasi-Yagi antenna fed by half mode substrate integrated waveguide," 2008 Asia-Paci¯c Microwave Conference, 1-4, 2008.
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