| WLAN (Wireless Local Area Network) is the connection between communication network and terminals. With the development of wireless local area network technology, WLAN has been used more and more widely in life and work, and it has been playing an increasingly important role. To meet the standard for wireless local area network, study of antenna for WLAN communication network requirements is of practical significance. The goal of this article is to design antennas to meet the standards of WLAN antenna, IEEE802.11a/b/g.Property of WLAN determines that the antennas of WLAN must have special requirements. According to these requirements, WLAN antennas should be miniaturized, broad-band and dual-band, and there are the characteristics of low profile, easily conformal, conveniently realizing the integration with microwave integrated circuits.Microstrip antennas have the advantages of small size, light weight, low cost, low profile and easily conformal. Besides that, the advantages of miniaturized, broad-band and dual-band could be realized easily, and the antennas can meet all the requirements of the WLAN antennas, which makes microstrip antennas be ideal choice. On the basis of related papers at home and abroad, through the quantitative analysis and simulation of microstrip antenna, three types of microstrip antennas are put forward to meet the demand for the standard of WLAN IEEE802.11a/b/g: A printed dipole antenna with the slot in the antenna arm works in dual-band. in fact, the slot makes one antenna be divided into two, and the balun achieves the antenna miniaturized, broad-band; The other two types of antennas are planar printed monopole antennas, and one of the two antennas is designed to work in dual-band based on non-symmetric structure, whereas, the other has symmetric double"G"structure. The symmetric structure not only gets the result of dual-band, but also achieves better radiation pattern. CPW-FED can miniaturize the size of the antenna and make the antenna easily integrated with microwave circuits. The structure of the antenna was analyzed theoretically in this paper, and the simulation and optimization of the design were done by EM simulation software. And then, according to the optimization of the size, the antenna was processed and tested, and the results show that the simulation results and measured results matched, and they are able to meet all the requirements of the standard for WLAN. Keywords: WLAN miniature broad-band dual-band microstrip antenna... |
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