Design And Application Study On A High FP Value Miniaturized IR-UWB Antenna Element

The design technique of a high FP value miniaturized IR-UWB antenna element is a basic but key technique of many high performance ultra wideband(UWB) radio systems, including UWB fuze system, UWB communication system and UWB medical biological imaging system. This technique has a great influence on the performance of UWB system, such as distance detection resolution, system error rate, clarity of imaging and so on. However, the dispersion problem of miniaturized multi-port UWB-A haven’t been solved absolutely by now. Moreover, the problem has badly influenced the performance of new IR-UWB system, so it need to be solved as soon as possible.Base on the proposed technique problem, a novel differential excited miniaturized multi-port UWB-A has been specially designed in this paper. Both simulated and measured results have shown that the designed antenna can reach a gain value of 6.8dBi during its working frequency band, 0.5-1GHz(which has a relative bandwidth of 66.7%). Meanwhile, when properly excited with Gauss signal, the FP value of the antenna can be no less than 0.7 and its performance is stable.Further studying the application characteristic of the proposed IR-UWB antenna in high performance UWB system, a UWB angular measuring system based on the proposed antenna has been built specifically in Chapter 5 and the system characteristics as well as simulation method are given. The simulated results shown that this antenna has good ability in 2D-angle measuring and 3D-target searching.The design technology and research ideas mentioned and used in this paper can provide methods for later UWB antennas’ design and research as well as assessing the ability of UWB antennas.