Abstract: In recent advanced applications, such as the satellite communications, point-to-point or point-to-multipoint wireless communications, higher antenna gains become more and more critical in the design of a transceiver module. However, it is understood that one single element antenna can never provide peak antenna gains as high as 20, 30dBi or even higher. In general, there are three major methods to increase the antenna gain. One is to design in the form of an antenna array, in which multiple antenna elements are integrated together. However, the power radiated from the antenna elements in an array inevitably will couple between each other, and the increasing number of antenna elements will lengthen the feeding transmission lines and thus increase the feedline losses. These factors hugely restrict the increase in antenna gains by means of an array. Another method is the use of reflectors to shape the mainbeam of a feeding antenna. At microwave frequencies, the paraboloid-shaped reflector antenna is perhaps the most well-known and widely used high-gain antenna for satellite communications. However, the difficulties in fabrication of reflector antennas make them expensive and not practical in many applications. In addition, the reflectors are very heavy. The last method, in which the refraction phenomenon in optics is applied to focus the electromagnetic waves, is the use of dielectric lenses. They are the so-called dielectric lens antennas. Recently, a specified surface of the dielectric lens has been proved to be able to efficiently sharpen the mainbeam in the far field. The dielectric lens antenna is composed of two parts, namely the well-shaped dielectric lens and a feeding antenna.
Due to the electrically very large dimensions of the dielectric lens antennas, there is only little commercial software suitable for us to analyze and design with. In the current project, we will try to analyze the dielectric lens antenna and give a simple and precise method for the future design of the dielectric lens. The general design guidelines of a dielectric lens antenna will be given. Also, in the following year, we will design, implement, and test a novel dielectric lens antenna, in which we will utilize a coplanar waveguide-fed printed antenna as the feeding antenna, to verify the proposed design method.