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Research on Active Transmitting and Receiving Antennas in Microwave Energy Transmission Systems

微波能量传输系统中有源发射接收天线的研究

基本信息

批准号：
06505002
负责人：
ITOH Kiyohiko
金额：
$ 23.87万
依托单位：
HOKKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1996
项目状态：
已结题

项目摘要

The purpose of our research project is to develop active antenna systems for receiving or transmitting microwave power in space solar power satellite systems. The following results are based on the patent obtained from the previous research project. First, the concept of "the virtual experiment environment" is proposed in order to design the antenna elements and the microwave circuits at the frequency of 2.45GHz. The microwave circuits are composed the transmitting active antenna system which uses the phase-control algorithm for beam steering. The cavity-backed slot antenna is proposed as the antenna element. Second, the application of the finite-difference time-domain technique is proposed in order to design the antenna element theoretically. The procedure is verified since numerical results agree with experimental ones. Furthermore, new antenna elements with simplified feeding structure are developed. In "the virtual experiment environment", the microwave circuits using silicon semiconductor devices are designed for the active antenna system. Finally, a new slot-coupled circular microstrip antenan (CMSA) is designed, which is a modified form of conventional CMSA with the slit cutting. Moreover, a new design for the slits is proposed to suppress re-radiation from the matching section at higher odd harmonic frequencies of 2.45CHz. The design is verified both numerically and experimentally.

我们的研究项目的目的是开发在空间太阳能卫星系统中接收或发射微波功率的有源天线系统。以下结果是基于先前研究项目获得的专利。首先，提出了“虚拟实验环境”的概念，以实现2.45GHz频段的天线单元和微波电路的设计。微波电路组成发射有源天线系统，采用相位控制算法进行波束控制。背腔缝隙天线被提出作为天线单元。其次，提出了应用时域有限差分技术进行天线单元的理论设计。数值计算结果与实验结果吻合较好，验证了该方法的正确性。此外，新的天线单元与简化的馈电结构的发展。在“虚拟实验环境”中，利用硅半导体器件设计了有源天线系统的微波电路。最后，设计了一种新的缝隙耦合圆形微带天线（CMSA），它是传统CMSA的一种改进形式。此外，提出了一种新的设计的狭缝，以抑制再辐射的匹配部分在高奇次谐波频率为2.45CHz。数值和实验验证了设计。