Abstract
Abstract. A functional 10×10 reflectarray antenna is developed for millimeter-waves. It has a gain of approximately 10 dBi and a continuous steering range from −30 to 30∘ in the horizontal plane. In this paper, the entire design process is explained, beginning with the design and function of the antenna element and followed by considerations regarding positioning of the feed antenna. Steering and controlling of the beam are discussed. Finally, the antenna patterns for different steering angles were measured in an anechoic chamber. The design is scalable, built with commercial off-the-shelf components, and the array does not need active cooling.
Highlights
The demand for high data rates in mobile communications and the limited bandwidth available in the sub-6 GHz frequency range has directed the focus towards millimeterwaves
For a millimeter-wave antenna, we require an antenna element, which can be produced using common printed circuit board (PCB), and which is robust against manufacturing tolerances
The minimum distance where the efficiency is higher than 75 % depends on the illumination efficiency, and the maximum distance is limited by the spillover efficiency
Summary
The demand for high data rates in mobile communications and the limited bandwidth available in the sub-6 GHz frequency range has directed the focus towards millimeterwaves. In comparison to sub-6 GHz mobile communication networks, a large number of antennas have to be installed to establish good coverage To make this economically reasonable, the antennas must be cost-effective, energy-efficient, and easy to maintain. The phase of the reflected wave is changed by conducting elements of different height. The maximum height difference of the elements is half a wavelength in free space to achieve a phase shift range of 360◦ This approach has already been realized at 95 GHz (Lee et al, 2015). In the late 1980s, with the availability of affordable printed circuit board (PCB) materials, the microstrip reflectarray emerged Nowadays, this is the most commonly used type of reflectarray, and it has the largest variety of designs with different characteristics (Nayeri et al, 2018).
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