| Summary: | 碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 102 === A simple multiple-input-multiple-output antenna for Long-term evolution / Wireless wide area network / Wireless local area network operation in mobile communication devices is proposed. The proposed antenna performs four resonance modes covering nine bands of wireless standards including GSM850/GSM900/GSM1800/GSM1900/UMTS/LTE2300/802.11n/LTE2500/802.11ac. In geometry, the antenna simple consists of a ㄈ-shaped monopole, two U-shaped, strip structures and a L-shaped structure. The ㄈ-shaped monopole exhibits the resonance frequencies at 0.8 GHz. With good impedance matching in medium band by added U-shaped and strip to the antenna. Adding L-shaped to the antenna can improve the impedance matching in higher band. In addition, isolation of MIMO antenna is improved by use slot to change current distribution. The isolation improved 18% in low band and 14.7% in middle band, low envelope correlation coefficient ＜0.1. The experimental results are verified by simulation. The antenna exhibits simple structure, easy production, low-cost for the applications in LTE/WWAN/WLAN communication.
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