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Sunday, October 12, 2014

So, So, So What?

From the post "So, So What?",

2Ulossθ2=cos(2θ)[μoB2{1(μoμa)2}εoE2{1(εaεo)2}]

then we come to the term,

[μoB2{1(μoμa)2}εoE2{1(εaεo)2}]

which we observe, flips the sign of the expression with increasing  E.  An increase in  E  can switch the system from minimum loss to maximum loss.

So, a pointy antenna has low loss only if  E  is keep within a range,

 E2<B2μoεo{1(μoμa)2}{1(εaεo)2}

And as long as  E is kept high, a flat antenna has minimum loss,

B2<E2εoμo{1(εaεo)2}{1(μoμa)2}

So, So, So, What?