A Three Valued Morse-Thue Fractal Tapering for Thinning of Fractal Array Antennas

Fractal array antennas are multiband and broadband array antennas having space filling capability. But large Side lobe levels and the huge number of elements are the prominent challenges in the designing of these arrays. In this paper, analysis of linear and heptagonal fractal array antennas are investigated with a three valued Morse-Thue tapering technique. Due to this fractal tapering , a notable improvement has observed in array factor properties and thinning of the elements can be achieved at the various iterations of linear and heptagonal fractal array antennas. These array antennas are analyzed and simulated by MATLAB programming.

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Design of Octagonal Fractal Array Antenna for Side Lobe Reduction with Morse-Thue Fractal Density Tapering Technique

10.20944/preprints201612.0040.v1 ◽

2016 ◽

Author(s):

V. A. Sankar Ponnapalli ◽

V. Y. Jayasree Pappu

Keyword(s):

Wide Band ◽

Side Lobe ◽

Array Antenna ◽

Ultra Wide Band ◽

Space Filling ◽

Remarkable Improvement ◽

Array Antennas ◽

Fractal Density

Fractal array antennas are multiband arrays having ultra wide band and space filling facility. But Side lobe levels and large number of antenna elements are the major designing challenges of these arrays. In this paper, design and analysis of octagonal fractal array antenna is investigated with Morse-Thue fractal density tapering technique (MTFDT). Due to the proposed technique, a remarkable improvement has observed in Side lobe levels and thinning of the elements can also be attained at the various iterations of octagonal fractal array antenna. These arrays are analyzed and simulated by MATLAB-15 programming.

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Design and Analysis of Novel Fractal Linear and Planar Array Antennas for Satellite Applications

Advanced Electromagnetics ◽

10.7716/aem.v5i3.400 ◽

2016 ◽

Vol 5 (3) ◽

pp. 56 ◽

Cited By ~ 3

Author(s):

V. A. Sankar ◽

P. V. Y. Jayasree

Keyword(s):

Design Methodology ◽

Beam Width ◽

Side Lobe ◽

Circular Ring ◽

Geometric Design ◽

Side Lobe Level ◽

Array Antennas ◽

Repetitive Nature ◽

Satellite Applications ◽

Planar Array

This article proposed a new geometric design methodology for the systematic expansion of fractal linear and planar array antennas. Using this proposed geometric design methodology any deterministic polygon shape can be constructed. In this article, two element fractal linear and triangular array antennas are examined using proposed methodology up to four iterations of two expansion factors. Due to the repetitive nature of the proposed geometric design methodology, both linear and planar fractal arrays shows multi-beam behavior with excellent array factor properties. The behavior of the proposed arrays shows better performance than linear and planar fractal array antennas generated by concentric circular ring sub array geometric generator. Triangular planar fractal array of expansion factor two at fourth iteration achieved a single valued beam width of 3.80 with -31.6 side lobe level. The suggested fractal arrays are analyzed and simulated by MATLAB-13 programming.

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