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Finding Optimum Subreflector Dimensions in Cassegrain Antenna Using Newton-Raphson Method

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2018

Key Words:

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this paper, in order to find the optimal dimensions of the subreflector for minimizing the effects of aperture obstruction, the complex and nonlinear equation related to the design of the Cassegrain antenna and feed antenna, which is a conical corrugated horn antenna, is presented as a singlevariable equation versus ‘A’, one of the parameters of the hyperbolic reflector surface. Then this equation is solved using the Newton-Raphson numerical method with high accuracy and high speed. At the end of the paper, a design example was investigated to reveal the above method and the optimal dimensions of the Cassegrain antenna structure were calculated using this method.
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REFERENCES

References: 

[1] A-R. Sharifi , S. Toofan,” Designing Geometric Parameters of
Axisymmetrical Cassegrain Antenna and Corrugated Horn Feed for
Circularly Polarized Communications”, Journal of Advanced Computing
and Communication Technologies, Vol. 3 , No.1, Feb. 2015, pp. 6-11.
[2] Chapra, S. , “Applied Numerical Methods With MATLAB for Engineers
& Scientists” , McGraw-Hill , 3rd Edition, 2011.
[3] T. Milligan, “Modern Antenna Design “(McGraw-Hill, New York,
1985).
[4] W.L. Stutzman and G.A Thiele, "Antenna Theory and Design" , 3rd ed.,
Wiley, 2010.
[5] “ MATLAB 7.4.0.347 (R2009a) Software,” The MathWorks, Inc.,
February ,12, 2009.

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