International Symposium on Antennas and Propagation


Session Number:FrD2



Radiation Pattern Optimization Using Quiescent Elements in Circular Array Antenna with Cylindrical Dielectric Load

Yuto Suzuki,  Mitsuharu Obara,  Naoki Honma,  


Publication Date:2011/10/25

Online ISSN:2188-5079


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Recently, the data transmission rate is increasing in the communication systems. In the millimeter wave (mm-wave) band, there are many potentially available bands that have not been used. Therefore, it is expected that a large capacity of the transmission rate are realized using mm-wave. Also, it is able to miniaturize the RF-system because wavelength of mm-wave is short, i.e., it is around 1 ~ 10 mm. For such reasons, the new systems like wireless HD (High Definition) and ultra high-speed WLAN (Wireless Local Area Network) have attracted much attention [1]. However, the higher transmit power is necessary to overcome the higher path loss at mm-wave. Therefore, a high-gain antenna is required to overcome this problem. The beam scanning antenna can be one of the solutions for achieving high gain to any direction. However, it is difficult to miniaturize the switched sector-beam antenna if the antenna consists of the individual antennas as many as the number of the beams. In this paper, we propose a dielectric cylinder-loaded antenna and describe optimization of termination conditions at quiescent antenna elements. It is clarified that the proposed antenna is effective in achieving high-gain and miniaturizing the size of the antenna. Finite-Difference Time-Domain (FDTD) analysis is used for