Miniaturization Of Broadband Microstrip Antenna Research And Wireless Communication Antenna Design

As necessary components in modern wireless systems, antenna plays a vital role in the quality of communication and it is often the main obstacles in the development of compact wireless communication system. In this paper, the author researched compact broadband microstrip antenna,WLAN (wireless local area network) and UWB band-notched antenna, and proposed several novel antennas.In the first chapter of this thesis, radiation principle, analysis method and basic parameter of microstrip antenna were briefly introduced.The main content of chapter II describes the compact and broadband techniques of microstrip antenna. The author summarized several techniques from papers to achieve compact and broadband microstrip antenna. In the end, the author proposed a broadband stacked patch antenna and the relative bandwidth is 89%.Chapter III introduces the design of planar UWB antenna and UWB band-notched antenna. The author took a brief introduce on several UWB band-notch antennas, and summarizing the techniques to achieve band-notch design. A novel UWB antenna and it's band-notched antenna that designed by the author were presented in details. Chapter IV introduces the design of wireless local area network (WLAN) antenna.The WLAN include two frequencies bands of 2.4-GHz (IEEE 802.11b/g, 2400-2484 MHz) and 5-GHz (IEEE 802.11a, 5150-5825 MHz). Several WLAN dual-band antennas in the references were introduced in this chapter. A triple band WLAN antennas that designed by the author was introduced in details in the end.In Chapter V, a summary of the whole dissertation is given, and future research topics are suggested.