Development of Design System for Metallic Guiding Devices Coping with High-Speed Transmission of Digital Signals

随着半导体技术的发展，现今用于通信设备的数字信号达到5-10 Gbps的级别。已经尝试构建这种高速传输的测试系统。其中，金属引导装置被认为即使在不久的将来比特率增长几倍时也会发挥重要作用。这是因为金属可以被经济地和精确地加工，并且进一步地，它们不需要集成电路中的光电变压器。基于这种情况，本研究旨在开发用于克服与这类传输相关的困难的元件技术，开发将电磁和电路理论联合收割机相结合的精确仿真方法，并将上述方法应用于各种具体指南。所处理的模拟技术包括积分方程法、模式匹配法和等效源法等，这些方法用于解决以下问题。（1）高质量导向装置和天线的分析、设计、制造和评估：平行板金属透镜、同轴电缆、隔离器、圆偏振发生器、金属光栅和介质光栅。（2）研究了用于消除数字信号中的噪声的棱锥形电磁波吸收体的特性。（3）金属表面粗糙度引起的导体损耗的计算，这是高频传输的难点之一。（4）将所发展的数值方法应用到探测地下目标的信号处理算法中。经过两年的努力，基本上形成了设计体系建设的基本思路。这一过程统一了从设计到包装的过程，使我们能够减少时间和经济成本。该系统易于扩展和改进。

According to the development of semiconductor technology, digital signals used for communication equipments nowadays reach the 5-10 Gbps class. Testing systems for this kind of high-speed transmission have been tried to construct. Among them, metallic guiding devices are believed to play important roles even when the bit rate grows several times in the near future. This is because metals can be processed economically and with accuracy, and further, they do not need optical-electrical transformers in the integrated circuits. Based on this situation, the present research aims at the development of element techniques for overcoming difficulties related to this class of transmission, the development of accurate simulation methods that combine the electromagnetic and circuit theories, and the application of the above to various concrete guides. Treated simulation techniques include the integral equation method, the mode matching method, and the equivalent source method, and so on. These are used to attack the following problems. (1)The analysis, design, fabrication, and evaluation of guiding devices and antennas of high quality : parallel plate metallic lenses, coaxial cables, isolators, generators of circular polarization, metallic gratings, and dielectric gratings. (2)The investigation of properties of electromagnetic wave absorbers of pyramidal shape, which is a useful material for elimination undesired noises of digital signals. (3)The computation of conductor losses due to the roughness of metallic surfaces, which is one of the difficulties in high frequency transmission. (4)The incorporation of the developed numerical method to the signal processing algorithm for exploring buried targets. For these two years, the fundamental routine to construct the designing system has been almost established. This process unifies the process from design to packaging, and enables us to reduce the time and economical cost. It is easy to extend and improve the system in the future.