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The dielectric metamaterial lens antenna for wide angle beam scanning is discussed as an applicative antenna. The availability of the low-loss structure using dielectric resonator and the cause of the reduction of the antenna efficiency are clarified by the electromagnetic simulations. The validation of the design of the metamaterial lens antenna is clarified through the experiment.
In this paper, the NRI lens antenna using dielectric resonators for wide angle beam scanning is presented. The constant beam scanning characteristics of the NRI lens antenna is confirmed. And the reduction of the antenna efficiency is due to the dielectric loss of the parallel plate waveguide and the staircase approximation of the lens shape.
The practical array feed is achieved through developing the array element and the power divider. Important technical results developed are summarized as follows. (1) As array element antenna, the convenient patch antenna configuration is developed. (2) For the 30deg beam scanning, the 8 branch power divider is fabricated. Accurate excitation coefficients are ensured through the measured results. (3)...
In the recent ITS (Intelligent Transportation Systems) services using millimeter wave frequency bands, dielectric lens antennas were studied for a radar system of adaptive cruise control (ACC) of automobiles. Authors developed a shaped dielectric lens antenna which was suitable for wide angle beam scanning and beam scanning abilities were ensured. Moreover, by introducing an array feed of rectangular...
In order to increase beam shapes and antenna gains, patch array feed for the shaped dielectric lens antenna is developed. Important technical progresses are summarized in the following. The array element patch antenna that has the similar radiation patterns as a rectangular horn is developed. Excitation coefficient of the patch array feed is obtained through the radiation pattern synthesis method...
In ITS services, millimeter wave frequency bands are used and antennas are required beam scanning ability. Wide angle scanning can be achieved by introducing Abbe sine condition to lens surface shaping. Authors designed a lens antenna that could achieve beam scanning over plusmn30deg. Narrow beam widths were maintained on the scanning planes. However, beam shapes were distorted on the transverse planes...
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