You may notice this is a little longer than the true electrical quarter wavelength such as that is used in the BiQuad tutorial .您可能会注意到,这是一点点的时间比真实的电气使用四分之一波长,如的双二阶教程中。 Admittedly, I don't know why this is the case, but it appears to work best 1-2% longer than the electrical wavelength, so we'll go with it.诚然,我不知道为什么是这样的情况下,但它似乎工作最好的1-2%,超过了电子的波长较长,所以我们会去用它。