Investigation On The Technology Of Low And Medium Power Rectenna

With the global energy crisis coming, human being is speeding his pace to develop and utilize the solar power. This will become true when the space solar power satellite (SSPS) was presented. Recent teens years, the microwave power transmission technique as the important role in the SSPS has expanded its applications in other fields, so it is become very significative and tremendous application potentials.The rectenna technique has been systematically and deeply investigated in both theory and experiment. This work was supported by National Natural Science Foundation of China.The major contributions of the work presented in this thesis are listed as follows:1. The microwave energy supply system for in-pipe inspect micromachine was set up by using microwave transmission theory. This system concludes microwave energy exciting device and the power receiving device (rectenna). The exciting device keeps the microwave transmission with single te mode, and it solves the problem resulting from polarization rotation andpower transmission stability. The measured transmission attenuation of 1.3dB/m was in good agreement with the calculated results of 1.1dB/m, so the exciting device can be used to supply power to in-pipe micromachine. Due to the small size of the pipe and polarization rotation because of the micromachine rotation, we designed two type receiving antennas, one is quasi-Yagi antenna, the other is circularly polarized microstrip antenna. To produce higher output voltages than would be produced by a single diode, A voltage doubler was realized using the two series diodes in the HP-HSMS8202.The experiment results prove that this energy supply system can keep the motor of micromachine in-pipe work normally.2. An Agilent 8722ES Network Analyzer with option 085 was configured to directly measure the diode large signal characteristics. Meanwhile, we also designed a set of accurate TRL calibration kits. Using the measurement system we can directly get the large signal S parameter and the input impedance of the diode, then Ansoft Harmonic software was used to determine the diode equivalent circuit parameters by the optimize command that curve fits the diode circuit model to the measured S parameter data. A corresponding matching circuit was designed by using the diode measured data. The experiment results of the rectifying circuit...