| Summary: | 碩士 === 樹德科技大學 === 電腦與通訊系碩士班 === 106 === In this thesis the design of LTE/WWAN/WLAN multi-frequency MIMO antennas for notebook computers has been studied. The thesis is divided into three themes. Each topic is an extension of the previous one. The first topic uses a simple monopole antenna structure and the short-circuit strip to excite the LTE/WWAN/GPS band. By adjusting the branch length of the monopole antenna and the coupling amount for the short-circuited strip, the high- and low-frequency modalities can be controlled and the LTE/WWAN/GPS operating band can be effectively activated. The second topic is based on the antenna of the first subject. The antenna is mirrored to make it reach the effect of multiple input and multiple output of MIMO. It can effectively send and receive signals, and it can be performed by adjusting the arrangement of the antenna design method of the first theme. By tuning the length of the branch of the monopole antenna, the coupling amount for the short-circuited strip, and the offset for mirroring to reach the frequency band of the LTE/WWAN/GPS. In the third topic, the most important WLAN function of the laptop computer is embedded and combined with the first two themes to design a WLAN antenna with mirrored MIMO effect. The simple WLAN antenna and its branches stimulate the WLAN frequency band. By adjusting the length of the monopole antenna to control the high and low frequencies, and then it can effectively stimulate the WLAN operating frequency band.
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