搜索 - 科创

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由于整合到pcb上时指标急剧恶化而不能使用，只能做成模块，算是半个解决了吧。参考的是homevna的电桥方案实测效果图，9khz时还有6.5dB的方向性，10GHz带宽内基本和原作者的做的指标一致上图...

我看了老的nanoVNA代码发现中频滤波是采用IIR+FIR带通方式进行滤波的（音频ADC芯片内部配置下寄存器即可），但是最新的代码却没有找到中频滤波器参数设置的地方，那就不知道它中频是怎么处理的了（...

换一个角度看，这个电桥和下面链接里的电桥其实是一回事（除了等臂与不等臂的区别）。链接里的电桥，如果按照本文看，同轴线的外皮和系统的地，势必要构成一个9.3ohm的有损传输线。然而链接里的电桥，直接简单...

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