| Recently, with the popularity of wireless communication products, the ultra-wideband (UWB)technology has a fast development. Since the Federal Communication Commission (FCC)authorized the unlicensed use of the UWB (3.1-10.6 GHz) in February 2002, UWB system designand application have become the focus of the wireless communication in academic and industrialfields. UWB antennas, as the fundamental and essential part of the UWB wireless communication,have experienced many significant developments and have been getting more and more popular dueto its simple structure, low cost, wide bandwidth, high data transmission rate and low powerconsumption. Micro-strip patch antennas, because of their advantages of low profile, low weight,low cost, easy fabrication and integration easily with other microwave circuit components, are usedwidely in commercial communication systems.In this thesis, a novel polygon UWB micro-strip antenna is analyzed and optimized. The mainwork is as follows. First of all, the knowledge of the UWB technology and the UWB antenna isintroduced briefly. Secondly, the impedance bandwidth of the reference antenna is broaden byinserting rectangular slots to the radiator, the ground plane and the micro-strip line and adjusting thedimensions of the slots. Finally, some notched sub-bands are obtained by etching two T-shapedslots on the radiating patch.In summary, on the basis of the reference antenna, some optimization and design has been madein this thesis. The bandwidth of the reference antenna has a good improvement, and double-notchedcharacteristics have been achieved, so the thesis has a certain practical significance. |
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