Gain Enhancement of the Helical Antenna by Effecting TurnSpacing
|International Journal of Engineering Trends and Technology (IJETT)||
|© 2013 by IJETT Journal|
|Year of Publication : 2013|
|Authors : Yazdan Khan , Ashish Kumar , Jayant Sharma|
Yazdan Khan , Ashish Kumar , Jayant Sharma. "Gain Enhancement of the Helical Antenna by Effecting TurnSpacing". International Journal of Engineering Trends and Technology (IJETT). V4(5):2158-2162 May 2013. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group.
Helical antennas have been widely used as simple and practical radiators over the last few decades. The reason of this demand is that, these antennas are having re markable and unique properties such as naturally providing circularly polarized radiation and also they have been so much popular in applications from VHF to microwaves requiring circular polarization, especially in case of satellite communications where more gain is required and that can be provided by adopting a helical antenna alone, a helical antenna can also be used as a feed for a parabolic dish for higher gains. As compared to the microstrip antenna, helical antennas are having a large bandwidth. Although gain of helical antenna is sufficient for communication purpose, but for applications like satellite communication, space communication etc., these antennas require high gain. The antenna performance is optimized by varying antennas geometrical parameters for narrowband and broadband design. So in this paper we have tried to increase the gain of helical antenna by decreasing the spacing between the turns of coil. Calculation and measurement for this new antenna have been done with the help of software MATLAB and also from HELICAL ANTENNA DESIGN CALCULATOR. In this paper by e ffecting the turn spacing we are able to increase the gain by 8.75% successfully
 J .D. Kr a u s , “Helical beam antennas,” Electronics , 20 , 109 - 111, April 1947.
 J.D. Kraus, Antennas , New York: McGraw - Hill, 1988.
 G.A. Thiele, W.L. Stutzman, Antenna Theory and Design , New York: J. Wiley, 1981.
 T.E. Ti c e and J .D. Kr a u s , “The influence of conductor size on the properties of helical beam antennas,” Proc. IRE , 27 , 1296, November 1949.
 H.E. King and J .L. Wong, “Characteristics of 1 to 8 wavelength uniform helical antennas”, IEEE Trans. Antennas Propagat. , AP - 28 , 291 - 296, March 1980.
 J .L. Wong and H.E. King “Empirical helix antenna design” Antenna and Propagation Society International Symposium , v ol. 20, 366 - 369, May 1982.
 D.T. Eme r s o n , “The gain of the axial - mode helix antenna,” Antenna Compendium , 4 , 64 - 68, 1995.
 Poynting , “Helical Antenna Design Curves”, www.poynting.co.za/tech_training/helical.shtml .
 A.R. Djordjevi?, A.G. Zaji? , a nd M.M. I l i ? , “Enhancing the gain of helical antennas by shaping the ground conductor,” IEEEAntennas and Wireless Propagation Letters , vol. 5, 138 - 140, May 2006.
Antenna gain, antenna length, helical antennas