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据美国刊物“微波与射频”1987年9期报导:目前在美国通过西雅图Dorado公司的技术代表可以购买到中华人民共和国六家工厂生产的、频率自18至110GHz的波导元件。这些元件包括:直波导、弯波导、扭波导、固定负载与滑动负载、固定衰减器与可变衰减器、螺钉调配器、定向耦合器、铁氧体调制器和波导开关等。这些元件已与Dorado公司各种系列产品配套。配套产品有几种机械调谐和电调体效应振荡器、平衡混频器等等。中国产的波导元件到达Dorado公司后在包装运往用户前均经过重新测试。其技术性能与英、美两国所生产的波导元件相近或相同,而其价格却要比后者明显地低。原因在于:毫米波元件的制造是需要精加工工时多和劳动强度大的工作,而中国的工资低,因此这些元件的造价仅为美国或英国的几分之一!上述大部份元件交货时间很短,表明中国国内工厂有较大的库存。
According to the American publication “Microwaves and Radio Frequency,” 1987, No. 9, it is now available in the United States through technical representatives from Dorado in Seattle to purchase waveguide components at frequencies from 18 to 110 GHz at six factories in the People’s Republic of China. These components include: straight waveguide, curved waveguide, twisted waveguide, fixed and sliding loads, fixed attenuators and variable attenuators, screw adapters, directional couplers, ferrite modulators and waveguide switches. These components have been bundled with Dorado’s range of products. There are several products supporting mechanical tuning and electrical modulation effect oscillator, balanced mixer and so on. Chinese-made waveguide components arrive at Dorado and are retested before being shipped to the customer. Its technical performance and the United Kingdom and the United States produced waveguide components similar or the same, but its price is significantly lower than the latter. The reason is that millimeter-wave components are manufactured with a high number of finishing jobs and labor-intensive tasks, while wages in China are low, so the cost of these components is only a fraction of that in the United States or the United Kingdom. Most of these components are delivered The time is short, indicating that China’s domestic factories have a larger inventory.