R=(n1−n2n1+n2)2andReturn Loss (dB)=−10log⁡10(R)R = \left(\frac{n_1 - n_2}{n_1 + n_2}\right)^2 \quad\text{and}\quad \text{Return Loss (dB)} = -10\log_{10}(R)R=(n1​+n2​n1​−n2​​)2andReturn Loss (dB)=−10log10​(R)