Study on simultaneous microwave power transmission to multiple directions on solar power Station/satellite

太阳能卫星是一种清洁的、取之不尽的能源，是解决能源危机的有效途径之一。微波能量传输是SPS的关键技术之一。反向阵列用于将功率波束引导到整流天线位置（功率接收位置）。从接收端发送一个导频信号，并对该导频信号进行扩频调制。该方法具有抗噪声、区分信号和干扰以及科普多导频信号的能力。通过带阻滤波器和软件同步检测，天线和频带由功率发送器和导频信号接收器共享。评估了导频信号的两个信道之间的相位差检测的基本特性。利用一个8单元阵列天线进行了实验，在相同的发射功率下成功地检测到了到达方向。SS导频信号系统是为2.45 GHz制作的，并应用于5.8 GHz SPORTS（空间功率无线电传输系统）。利用遗传算法对均匀激励天线阵的单波束和多波束形成进行了优化

Solar Power Satellite is a clean and inexhaustible energy source and one of promising methods to save the energy crisis. Microwave energy transmission is one of key technologies of the SPS. The retrodirective array is used in order to direct a power beam to a rectenna site (power receiving site). A pilot signal is sent from the receiving cite and we apply the spread spectrum (SS) modulation to this signal. This method is robust to noises, can differentiate the signal from interferences and cope with multiple pilot signalsA new microwave power transmission system using a SS pilot signal is developed for the SPS (Solar Power Satellite). The antennas and a frequency band are shared by both power transmitters and pilot signal receivers by band elimination filters and software synchronization detection. Fundamental characteristics of phase-difference detection between two channels of a pilot signal are evaluated. An experiment with an 8-element array antenna was performed and the direction of arrival was successfully detected under transmitting power from the same antennas. The SS pilot signal system was made for 2.45 GHz and applied to 5.8 GHz SPORTS (Space Power Radio Transmission System). Single- and multi-beam forming for uniformly excited antenna array is optimized using the genetic algorithm