volume | PIER Journals

2016-07-29

Gain Enhancement in Planar Monopole Antennas

Lin-Chuan Tsai

Prof. Lin-Chuan Tsai

Department of Electronic Engineering

Lunghwa University of Science and Technology

Taiwan

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Progress In Electromagnetics Research C, Vol. 66, 129-137, 2016

doi:10.2528/PIERC16050308

Abstract

This paper proposes a planar monopole antenna design for achieving gain enhancement. The radiation pattern is achieved straightforwardly by employing a detached glass slab and placing a reflected metal slab after the glass slab onto the antenna structure. Geometrical parameters were examined to optimize the performance of the proposed antenna. Such a configuration causes constructive interference between the incident and reflected fields. The radiation patterns can be adjusted the thickness of the glass slab and dielectric constants. The radiated fields are redistributed because of the inclusion of the glass slab, which has a permittivity of ε_r = 7.75 and a thickness of h = 1 mm. Consequently, the planar monopole gain achieved using the glass slab and reflected metal slab is increased to approximately 5 dBi, whereas the antenna resonant frequency remains almost unchanged at nearly 14% in impedance bandwidth. The results obtained for the directional pattern, return loss, gain, and radiation efficiency of the proposed antenna were analyzed. The antenna volume of the radiation area and ground plane was 3 × 32 × 52 mm³. Detailed simulations and experiments were conducted to optimize the gain enhancement operations, and the measured results agreed with the simulated ones.

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Lin-Chuan Tsai, "Gain Enhancement in Planar Monopole Antennas," Progress In Electromagnetics Research C, Vol. 66, 129-137, 2016.
doi:10.2528/PIERC16050308

References

1. Rivera-Albino, A. and C. A. Balanis, "Gain enhancement in microstrip patch antennas using hybrid substrates," IEEE Antenna Propagat. Lett., Vol. 12, 476-479, 2013.
doi:10.1109/LAWP.2013.2256333

2. Lai, W.-C., A.-C. Sun, N.-W. Chen, and C.-W. Hsue, "Gain enhancement of planar monopole with magnetodielectric material," Progress In Electromagnetics Research C, Vol. 21, 179-190, May 2011.
doi:10.2528/PIERC11032101

3. Chung, K. L. and S. Kharkovsky, "Mutual coupling reduction and gain enhancement using angular offset elements in circularly polarized patch array," IEEE Antenna Wireless Propagat. Lett., Vol. 12, 1122-1124, 2013.
doi:10.1109/LAWP.2013.2280656

4. Yang, W., W. Che, and H. Wang, "High-gain design of a patch antenna using stub-loaded artificial magnetic conductor," IEEE Antenna Wireless Propagat. Lett., Vol. 12, 1172-1175, 2013.
doi:10.1109/LAWP.2013.2280576

5. Moharamzadeh, E. and A. M. Javan, "Triple-band frequency-selective surfaces to enhance gain of X-band triangle slot antenna," IEEE Antenna Wireless Propagat. Lett., Vol. 12, 1145-1148, 2013.
doi:10.1109/LAWP.2013.2281074

6. Ge, Y., K. P. Esselle, and T. S. Bird, "The use of simple thin partially reflective surfaces with positive reflection phase gradients to design wideband, low-profile EBG resonator antennas," IEEE Trans. Antennas Propagat., Vol. 60, No. 2, 743-750, Feb. 2012.
doi:10.1109/TAP.2011.2173113

7. Weily, A. R., T. S. Bird, and Y. J. Guo, "A reconfigurable high-gain partially reflecting surface antenna," IEEE Trans. Antennas Propagat., Vol. 56, No. 11, 3382-3390, Nov. 2008.
doi:10.1109/TAP.2008.2005538

8. Debogovic, T., J. Bartolic, and J. Perruisseau-Carrier, "Dual-polarized partially reflective surface antenna With MEMS-based beamwidth reconfiguration," IEEE Trans. Antennas Propagat., Vol. 62, No. 1, 228-236, Jan. 2014.
doi:10.1109/TAP.2013.2287013

9. Debogovic, T. and J. Perruisseau-Carrier, "Array-fed partially reflective surface antenna with independent scanning and beamwidth dynamic control," IEEE Trans. Antennas Propagat., Vol. 62, No. 1, 446-449, Jan. 2014.
doi:10.1109/TAP.2013.2287018

10. Hosseini, A., F. Capolino, F. De Flaviis, P. B. G. Lovat, and D. R. Jackson, "Improved bandwidth formulas for Fabry-P´erot cavity antennas formed by using a thin partially-reflective surface," IEEE Trans. Antennas Propagat., Vol. 62, No. 5, 2361-2367, May 2014.
doi:10.1109/TAP.2014.2307337

11. Vaidya, A. R., R. K. Gupta, S. K. Mishra, and J. Mukherjee, "Right-hand/left-hand circularly polarized high-gain antennas using partially reflective surfaces," IEEE Antenna Wireless Propagat. Lett., Vol. 13, 431-434, 2014.
doi:10.1109/LAWP.2014.2308926

12., HFSS 13, Ansoft Corporation (ANSYS), Available: www.ansoft.com.

13. Cheng, D. K., Fundamentals of Engineering Electromagnetics, 2 Ed., Addison Wesley, 1993.