| Summary: | 碩士 === 國立中央大學 === 電機工程研究所碩士在職專班 === 98 === The design and analysis of dipole arrays for IEEE 802.11n/b/g 2.4GHz multi-input multi-output (MIMO) wireless access points are presented. The one-dimensional array configuration and the extended ground plane are exploited for antenna directivity enhancement. Also, the isolation between elements is improved and the impact of the multi-path effect on system performance is reduced. With the proposed antenna, the indoor coverage and throughput of the MIMO access point are reasonably improved.
The antenna structure consists of a 50Ω microstrip-line feed and two dipole antennas as array elements. The microstrip-line feed is connected to the corporate feed through the 1.32mm coaxial cable with I-PEX connectors. The proposed antenna arrays are characterized with the commercial full-wave electromagnetic solver, CST Microwave Studio. The antenna design is verified through the measurement results. The simulation and measurement results show that the proposed antenna features similar radiation patterns of the traditional half-wavelength dipole. However, the antenna gain and directivity are reasonably increased, which leads to better indoor coverage and throughput associated with the MIMO access point.
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