| Summary: | 碩士 === 國立臺灣科技大學 === 電子工程系 === 94 === In thesis, In ISM band the printed dipole array antenna is proposed. The printed dipole array antenna consists of one dipole array arranged back to back and can be easily formed by printing on both sides of a dielectric substrate. Based on the matching theory, which includes of a 50Ω microstrip feed line with open stub matched circuits is designed. Properties of the radiator as an array element have also been investigated. Simulator IE3D is used to verify our analysis.
The dipole antenna is a very simple antenna suitable for use when a nearly omnidirectional pattern is required. However, its gain is low. In many communication systems, one is interested in point-to-point communication, and a much more highly directive beam of radiation can be used to advantage. By arranging several dipoles into an array, a higher directive beam of radiation can be obtained. A more directive beam means that the antenna will also have a higher gain. In addition to single band antenna, we utilize parallel LC resonator to design a dual-band antenna for wireless LAN.
Both simulation and measured data are pretty matched. The printed dipole two elements array antenna achieves gain for 5.2 GHz band to be about 3-4.6 dBi with 800MHz bandwidth. The printed dipole four elements array antenna achieves gain for 5.2 GHz band to be about 5-6.4 dBi with 400MHz bandwidth.
Both simulation and measured results are highly matched. The printed dipole array antenna which is economic cost has been proposed and successfully implemented.
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