Abstract
A 3-D beam scanning antenna array design is proposed that gives a whole 3-D spherical coverage and also suitable for various radar and body-worn devices in the Body Area Networks applications. The Array Factor (AF) of the proposed antenna is derived and its various parameters like directivity, Half Power Beam Width (HPBW) and Side Lobe Level (SLL) are calculated by varying the size of the proposed antenna array. Simulations were carried out in MATLAB 2012b. The radiators are considered isotropic and hence mutual coupling effects are ignored. The proposed array shows a considerable improvement against the existing cylindrical and coaxial cylindrical arrays in terms of 3-D scanning, size, directivity, HPBW and SLL.
Highlights
Antenna arrays play a vital role in modern wireless communication systems
The Side Lobe Level (SLL) can be reduced by using concentric circular array geometry [4]
The deficiencies provided by the previous antenna array geometries in terms of uniform directivity in 3D space for circular, cylindrical and concentric cylindrical arrays, Half Power Beam Width (HPBW) and high SLL or high grating lobe can be reduced by using the proposed model
Summary
Antenna arrays play a vital role in modern wireless communication systems. Normally, single antenna element provides a relatively wide radiation pattern, having low values of directivity/ gain [1]. Antenna array geometry considerably affects the main lobe characteristics and the beam scanning capabilities of the array. The SLL can be reduced by using concentric circular array geometry [4].
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