| Summary: | 碩士 === 國立臺灣大學 === 電信工程學研究所 === 87 === The demand for wireless communication is experiencing unprece- dented growth. Smart antennas generally consist of an antenna array combined with signal processing and are used mainly for high-performance wireless system. So the design of the antenna array is more and more important.
The purpose of this study is to design a cpw-fed slot antenna array with a large number of elements. A carefully synthesized large array can suppress the side lobes of its radiating pattern. In our design, we analyze the self- and mutual- admittances of the slots in the array first. Then the transmission line theory is used to calculate the input impedance of the array, and an iterative process is employed to obtain a matched design and the required sizes of the slots for a desired slot voltage distribution.
Arrays with various number of elements are designed using this procedure at 7GHz, 14GHz and 22GHz. In all the cases, test pieces are carefully fabricated and measured to verify our design.
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