Moxon Antenna Array Design and Pattern Synthesis Technique

Abstract

A four-element moxon antenna array is proposed in this paper. Its directive properties are shown with simulations and compared with the classical dipole array. In order to synthesize the pattern of moxon array, a hybrid method that consists of differential evolution (DE) and numerical electromagnetics code version 2 (NEC2) is also introduced. Basically, the cost function used by DE is designed with the help of NEC2 simulations to achieve more realistic optimum antenna array designs. Patterns having one and double sidelobe suppression at predetermined angles are successfully synthesized by using this method whereas the gain value is maintained properly. Robustness of the proposed method is also examined. For this aim, multiple executions of the method implementation are performed under same conditions. The results show that the method introduced in this paper is very stable in terms of the radiation pattern and convergence curves.

Keywords

• Directive antenna arrays,metaheuristic algorithms,moxon antenna,NEC2,pattern synthesis

References

1. S. Winder and J. Carr, Newnes Radio and RF Engineering Pocket Book. United Kingdom : Elsevier, 2002.
2. I. Tekin, O. Manzhura, and E. Niver, “Broadband circularly polarized antennas for UHF SATCOM,” in 2011 XXXth URSI General Assembly and Scientific Symposium, 2011, pp. 1–4.
3. N. A. Chougale, S. K. Magdum, S. D. Patel, T. D. Dongale, and P. N. Vasmbekar, “Design and development of UHF Moxon antenna,” National Journal of Science and Information, pp. 93–95, 2012.
4. J. Carson, O. Manzhura, and E. Niver, “Efficient base station antenna element for mobile communications,” in Proceedings of 2014 3rd Asia-Pacific Conference on Antennas and Propagation, 2014, pp. 396–399.
5. R. Storn and K. Price, “Differential Evolution – A Simple and Efficient Heuristic for global Optimization over Continuous Spaces,” Journal of Global Optimization, vol. 11, no. 4, pp. 341–359, Dec. 1997.
6. S. D. VK and S. S. Kumar, “Optimum Design of Twin Polygonal Loop Antenna Array for UHF Applications,” in Advances in Computing and Communications (ICACC), 2014 Fourth International Conference on, 2014, pp. 323–326.
7. B. George and S. S. Kumar, “Optimal design of a symmetric monopole antenna with spiral geometry,” in Intelligent Computational Systems (RAICS), 2013 IEEE Recent Advances in, 2013, pp. 262–267.
8. G. J. Burke, A. J. Poggio, J. C. Logan, and J. W. Rockway, “Numerical Electromagnetic Code (NEC),” in 1979 IEEE International Symposium on Electromagnetic Compatibility, 1979, pp. 1–3.

9. Timothy C.A. Molteno, “NEC2++: An NEC-2 compatible Numerical Electromagnetics Code”, Electronics Technical Reports No. 2014-3, ISSN 1172-496X, October 2014.
10. Moxon Rectangle Generator (MoxGen), URL: https://ac6la.com/moxgen1.html. (Visited on Nov. 19, 2018).
11. 4nec2 Antenna Modeller and Optimizer, URL: https://www.qsl.net/4nec2/. (Visited on Nov. 19, 2018).
12. C. A. Balanis, Antenna Theory: Analysis and Design, 4 edition. Hoboken, New Jersey: Wiley, 2016.