VSWR table of return loss vs. voltage standing wave ratio RETURN LOSS VSWR (dB) 46.064 40.086 36.607 34.151 32.256 30.714 29.417 28.299 27.318 26.444 25.658 24.943 24.289 23.686 23.127 22.607 22.120 21.664 21.234 20.828 20.443 20.079 19.732 19.401 19.085 18.783 18.493 18.216 17.949 17.690 17.445 ...
Return loss (RL) and Voltage Standing Wave Ratio (VSWR) are both measurements used to quantify efficiency of power transfer in radio frequency (RF) and Microwave systems. They are related but represent same information in different ways. Return Loss in dB: It is a measure of reflected power ...
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It is often necessary to convert between VSWR and return loss - this can be done using simple formulas or a table provided here.
驻波比小于3,就是要求你的反射系数要小于1/2，也就是说你的功率损耗不能超过入射功率的25%，也就是说你的return loss要大于6db，return loss越大，你的信号反射的越少的，当然效率越高啦！好像工业上要求一般驻波比小于2的。
These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). A table of convenient values are presented at the bottom. Here is a JavaScript calculator forVSWR / Return Loss / Reflection Coefficient / Mismatch Error / Improvement ...
当VSWR小于3时，意味着反射系数需低于1/2，这表明功率损耗不超过入射功率的25%。从物理学角度分析，这等同于要求Return Loss（返回损耗）必须大于6dB。返回损耗越大，信号反射越少，设备效率自然就越高。在实际工业应用中，通常要求驻波比保持在2以下。为了进一步理解VSWR与Return Loss之间的关系，我们可以...
LossLossReflTransRefl VSWR(dB)(dB)Coeff(%)(%) 1.00—.000.00100.0.0 1.0146.1.000.00100.0.0 1.0240.1.000.01100.0.0 1.0336.6.001.01100.0.0 1.0434.2.002.02100.0.0 1.0532.3.003.0299.9.1 1.0630.7.004.0399.9.1 1.0729.4.005.0399.9.1 1.0828.3.006.0499.9.1 ...
It varies from +1 to infinite. 以下摘自:http://www.mscbsc.com/askpro/question87979 回波损耗RL 它是反射系数的倒数,以分贝表示。 RL的值在0dB到无穷大之间,回波损耗越小表示匹配越差,反之则匹配越好。 0dB表示全反射,无穷大表示完全匹配。 在移动通信中,一般要求回波损耗大于14dB(对应VSWR=1.5)。
Just in case you don't care for mathematical equations, here's a little "cheat sheet" table to help understand the correlation of VSWR to the percentage of reflected power that will return. NOTES Here is a download of this cheat sheet:VSWR vs. Return Loss ...