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李子蕙

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[问答]

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?

嗨,我有兴趣使用PNA-X在放大器上进行57到65GHz频段的噪声系数测量。据我所知,低噪声接收器工作频率高达50GHz。
但是对于更高的频段,我们需要使用带滤波器的前置放大器。
我的设备的噪声系数约为5到10dB,增益约为12 dB。
您能推荐一款可用于此测量的前置放大器和滤波器吗?
RGDS

以上来自于谷歌翻译


     以下为原文

  hi,

I am interested in making noise figure measurements in the 57 to 65GHz band on an amplifier using the PNA-X.As I understand,the low noise receivers work up to 50GHz. However for the higher band, we need to use a pre amplifier with a filter. The noise figure of my device is around 5 to 10dB and the gain is around 12 dB. Can you recommend a pre amplifier and filter that I could use for this measurement?

Rgds  

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潘晓明

2019-1-21 10:41:41
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。

以上来自于谷歌翻译


     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.
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