Symmetric T attenuator

Rb =		QΩRΩYΩZΩEΩPΩTΩGΩMΩkΩΩmΩμΩnΩpΩfΩaΩzΩyΩrΩqΩ	Input resistance☺
Rk =		QΩRΩYΩZΩEΩPΩTΩGΩMΩkΩΩmΩμΩnΩpΩfΩaΩzΩyΩrΩqΩ	Output resistance☺
AP =		NpbeldB1	Power amplification☺
exactE192 - 0.5 %E96 - 1 %E48 - 2 %E24 - 5 %E12 - 10 %E6 - 20 %6 digits5 digits4 digits3 digits2 digitsinteger ☺
			$a={\displaystyle \frac{1}{\sqrt{A}}}$
R14 =			Resistance☺ $R_{14}={\displaystyle \frac{(a^2+1)\cdot R_b-2\cdot a\cdot \sqrt{R_b\cdot R_k}}{2\cdot (a^2-1)}}$
R15 =			Resistance☺ $R_{15}={\displaystyle \frac{(a^2+1)\cdot R_b-2\cdot a\cdot \sqrt{R_b\cdot R_k}}{2\cdot (a^2-1)}}$
R16 =			Resistance☺ $R_{16}={\displaystyle \frac{2\cdot a\cdot \sqrt{R_b\cdot R_k}}{a^2-1}}$
R17 =			Resistance☺ $R_{17}={\displaystyle \frac{(a^2+1)\cdot R_k-2\cdot a\cdot \sqrt{R_b\cdot R_k}}{2\cdot (a^2-1)}}$
R18 =			Resistance☺ $R_{18}={\displaystyle \frac{(a^2+1)\cdot R_k-2\cdot a\cdot \sqrt{R_b\cdot R_k}}{2\cdot (a^2-1)}}$