能推荐用于毫米波噪声系数测量的前置放大器和滤波器吗？

我成功使用了Norden Millimeter的N10-2713放大器。
它具有~30 dB的增益，当与DUT一起使用时，它应足以克服50至67 GHz频段内任何PNA-X S参数接收机的本底噪声。
市场上可能还有其他放大器也可以工作。
为了获得相当低的测量抖动（NF跟踪噪声），过量噪声的总量（以dB为单位：DUT增益+ DUT噪声系数+前置放大器增益）应> = 45 dB。
还需要一个滤除PNA-X内部LO基波周围噪声转换的滤波器。
两个背对背的V281A（WR-15）同轴到波导适配器为50至67 GHz频段提供了完美的高通滤波器。
有关如何设置前置放大器和滤波器的更多信息，建议您阅读应用笔记1408-20（5990-5800EN）和应用笔记5991-2524EN。



     以下为原文

  I have successfully used an N10-2713 amplifier from Norden Millimeter. It has ~30 dB gain which should be sufficient when used with your DUT to overcome the noise floor of any of the PNA-X's  S-parameter receivers in the 50 to 67 GHz band. There are probably other amplifiers in the market that would also work. To get reasonably low measurement jitter (NF trace noise), the combined amount of excess noise (in dB: DUT gain + DUT noise figure + preamp gain) should be >= 45 dB. A filter to remove noise conversion around the fundamental of the PNA-X's internal LO is also required. Two back-to-back V281A (WR-15) coax-to-waveguide adapters make a perfect highpass filter for the 50 to 67 GHz band. For more information on how to set up the preamp and filter, I suggest you read app note 1408-20 (5990-5800EN) and app note 5991-2524EN.