The Design And Research Of Key Technologies About Ultra-wideband Microstrip Antenna Miniaturization

Much higher spectrum and transmission efficiency, increasing bandwidth as well, areneeded, with the rapid development of the modern wireless communication technology.Characterized by its high speed, safety, large capacity, low power consumption, multi-pathinterference resistance, and others merits narrowband communication system does not have,ultra broadband communication technology is widely paid attention. Not long ago, the3.1GHz to10.6GHz band spectrum was opened to business, civil systems by FCC. Next, UWBbecomes one of the most promising solutions in the wireless mobile communication systemsand a hot topic in the field of communication. Thus, with the development of UWB technique,the research and design of the ultra broadband antennas has attracted more and more attention.As a result, much more opportunities and challenges are brought to antenna designers. Thekey idea of this paper was to design and research ultra-wideband micro-strip antennas.In the first place, basic theory knowledge of ultra wideband micro-band antenna,including ultra-wideband communication related standards, application scope, the definitionof micro-band antenna, classification, the advantages and disadvantages of different feedermethods, radiation mechanism, basic parameters, widening tech of wideband, trapped wavetechs and analysis methods, was introduced in this paper. In the second place, CST simulationsoftware was used to have different designed antennas modeled and optimized. In addition,what influence did parameters have on performance and band of antennas was analyzed.Firstly, two types of micro-band linear feeder plane unipolar sub-print antenna weredesigned in this study, whose bandwidth well meet the wideband,3.1GHz to10.6GHz wherethe antennas performed well. Then, in order to meet the need of band resistance property ofWLAN,5.1GHz to5.9GHz, and maintain the original ultra-wideband property, two types ofUWB micro-band antenna, characterized by its trapped wave, were designed. Finally, twotypes of new structure antenna, CPW micro-band antenna and wide aperture antenna whichused the way of planar waveguide feeder, were designed. The former meet the need of thecommercial communication bandwidth required by UWB as well. The latter’s bandwidth was8GHz to18GHz, which could not only satisfy the definition of ultra-wideband antenna, butalso had an excellent radiation performance for its small size. And the latter could be applied to the x-band and Ku band satellite digital communication. Simulation and analysis results onthe designed antennas, with CST’s help, showed that the design met the article’s goal.