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--- faq:freedom-from-feedback [2015/04/21 16:22] – hess
+++ faq:freedom-from-feedback [2015/04/21 16:26] – [Freedom from Feedback] hess
@@ Line 1: / Line 1: @@
 ====== Freedom from Feedback ======
-As a theoretical rule of thumb, a good decoupling requires a distance of 5 to 10 λ. (([λ] Lambda = Wave length))
+As a theoretical rule of thumb, a good decoupling requires a distance of 5 to 10 λ.(([λ] Lambda = Wave length = v/f with v∼3×10<sup>8</sup> m/s.))\\
-In practive, in most cases a distance of 3 λ is sufficient. \\
+However, in practive often a distance of 3 λ is sufficient. \\
 \\
-<html>
-&lambda; = v/f with v∼3×10<sup>8</sup> m/s.
-</html>
 At 2.1 GHz (e.g. UMTS) the formula returns 300'000'000/2'100'000'000 = 300/2100 = 0.14m.