Compact design of a self-supported reflectarray-based subreflector for reflector antenna at 94 GHz
Sähkötekniikan korkeakoulu | Master's thesis
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Radio science and engineering
NanoRad - Master’s Programme in Nano and Radio Sciences (TS2013)
AbstractDue to the massive utilization of mobile communication channels, novel communication systems must work in higher frequency bands. These systems, such as microwave and satellite communications, require high gain antennas with a low profile due to their operational and deployment scenarios. Furthermore, the weight, calibration process, structural design and cost all lead to several manufacturing constraints. On the other hand, reflector antennas are less affected by these constraints. They are the best trade-off solution for these applications because of their simplicity and cost. In addition, the reflectarray antenna has similarly demonstrated its potential in the aerospace and automotive industry. For these reasons, this thesis examines the feasibility of synthesizing an axially displaced elliptical subreflector, part of a dual reflector antenna, thus continuing much needed research in new manufacturing techniques to decrease the profile of the reflector antenna as well as its cost. The analysis is performed using the W band, 94 GHz, which is used for small space object detection at long range. The outcomes are obtained through computational software, such as GRASP for physical optics analysis, CST for electromagnetic simulations, MATLAB for high-density calculations, and MRADANT-UPM for the reflectarray synthesis in microstrip technology. The results reveal that this technology is still in its infancy; thus, new avenues are suggested for further research. For example, the methodology used needs more development in areas, such as computational analysis efficiency.
Thesis advisorSalas Natera, Miguel Alejandro
Encinar Garcinuño, Jose Antonio
satellite antenna, self-supported feed, reflector antenna, hat-fed, reflectarray, splashplate