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自从1960年激光技术的出现和随后的光纤技术的发展,曾使毫米波技术的发展受到阻碍。但从70年代初期以来,由于空间技术、军事装备以及其它现代化科学技术发展的需要,对毫米波元器件的种类和性能提出越来越多的要求,不仅要求频带宽、功率大、效率高,而且要求可靠性高、付特性好,还能够与C~3I系统实现有效的结合,扩大目前十分拥挤的电磁频谱。毫米波和近毫米波是界于光波与红外之间的一段频域宽阔的电磁频谱,它蕴藏着十分丰富的信息资源。与光波相比,它具有方向性好、分辩率高、频带宽等优点。与激光相比,
Since the advent of laser technology in 1960 and the subsequent development of optical fiber technology, the development of millimeter wave technology has been hindered. However, since the early 1970s, due to the needs of space technology, military equipment and other modern science and technology development, more and more requirements have been put forward on the type and performance of millimeter wave components, which not only requires wide bandwidth, high power, high efficiency, And require high reliability, pay good characteristics, but also with C ~ 3I system to achieve effective combination of the current expansion of the current very crowded electromagnetic spectrum. Millimeter-wave and near-millimeter-wave are a wide band of electromagnetic spectrum in the frequency band between light wave and infrared. They contain a very rich information resource. Compared with the light waves, it has good direction, high resolution, bandwidth and other advantages. Compared with the laser,