1·The trouble is that commercially available rectifiers can only cope with frequencies of up to 100 gigahertz.
麻烦的是，市面上的整流器只能应付频率为10万兆赫的电流。
2·One of the key factors of affecting power factor of rectifiers is control technique.
控制技术是影响整流器功率因数的关键因素之一。
3·However, the current in the nanoantennae oscillates at a rate of trillions of cycles a second, which is beyond the range of existing rectifiers.
但是，纳米天线内的电流的频率高达每秒万亿次，这超出了现有整流器的工作范围。
4·Vacuum rectifiers are characterized by the following.
真空管整流器具有如下的特性。
5·The appearance of PWM rectifier offers a new way to solve the problem from the traditional rectifiers.
PWM整流器的出现为解决传统整流器的这些问题提供了新的途径。