Research Of Wireless Sensor Network Node Energy Complementary Technology

Emergence and development of wireless sensor network technology（WSN）hasbrought another revolution of modern information technology, greatly changed the waypeople’s social production and living. The energy problem of the Wireless sensor networknode is a barrier to restricting its development. So how to use energy come from the naturefor the wireless sensor node to replenish its energy become the focus of the researchdirection.The research direction of this paper is to use the space of stray electromagnetic energyfor wireless sensor network node to replenish its energy. Concrete implementation methodis to design a broadband wide high-gain antenna to receive the electromagnetic wave,transformed the electromagnetic energy into electricity. From the frequency range of theinternational rules and reduce the size of the antenna，the article respectively designed twokinds of antenna, dipole antenna and micro-strip antenna, mainly around the ultra-highfrequency （UHF） and2.45GHz. The main research contents are as follows:The article studies radiation principle and characteristics of dipole antenna, the articleintroduces the typical dipole antenna, the bending dipole antenna and the printed dipoleantenna characteristics and analyzes its performance. Finally, to meeting the needs ofsubject, by using the high frequency3D simulation software HFSS,we designed an ultrawideband and high gain dipole antenna.The antenna’s relative bandwidth is111%, thebiggest antenna gain is4.2dB. Under the best receiving state, it is assumed that theincoming wave power density is1mW/m2, The dipole antenna transferred the power to theload is30.0955μW.The article studies the characteristics of micro-strip antenna, including the structure ofthe micro-strip antenna, how to feed, the characteristics of the radiation field and themicro-strip antenna parameters. The article also studies the technology of micro-stripantenna’s miniaturization and broadening broadband. To meeting the needs of subject, thearticle design a typical micro-strip antenna, according to the simulation report, makes theconclusion on the performance of the antenna. On the basis of the conclusion, the articleanalyze the influence of different dielectric substrate on the antenna performance.Finally,by using HFSS, we designed a wide bandwidth high-gain micro-strip antenna, according tothe knowledge we discussed before. The antenna’s relative bandwidth is32.12%, the biggest gain is9.5dB and within the scope of the band gain greater than8dB. Under thebest receiving state, it is assumed that the incoming wave power density is1mW/m2, themicro-strip antenna transferred the power to the load is11.26μW.