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⎧ τn<br />

n+ 1 iρ n+<br />

1 −iρ n iρ n −iρ<br />

⎫<br />

Eiϕ<br />

= ∑ En⎨−senϕ ⎡ ( − i) e + ( i) e ⎤ + isenϕπn<br />

⎡ ( − i) e + ( i)<br />

e ⎤ ⎬=<br />

⎩ 2ρ ⎣ ⎦ ⎣ ⎦ ⎭<br />

senϕ<br />

∑<br />

n+ 1 iρ n+ 1 −iρ n+ 1 iρ n+<br />

1 −iρ<br />

E ⎡<br />

n<br />

−( −i) e τn −( i) e τn −( −i) e π<br />

n<br />

+ ( i)<br />

e π ⎤<br />

n<br />

=<br />

2ρ ⎣<br />

⎦<br />

n+ {() 1 −ρ i<br />

n+<br />

[ ] ( ) 1 iρ<br />

π −τ − − [ π +τ ]}<br />

senϕ<br />

∑ E i e i e<br />

2ρ n n n n n<br />

cosϕ<br />

n iρ<br />

n+<br />

1 iρ<br />

Es θ<br />

= ∑ En{ ianτn( −i) e −bn( −i)<br />

π<br />

ne<br />

} =<br />

ρ<br />

+<br />

{( ) 1 ρ<br />

[ ]}<br />

cosϕ<br />

n i<br />

= ∑ E −i e a τ + b π<br />

ρ<br />

n n n n n<br />

senϕ<br />

n iρ<br />

n+<br />

1 iρ<br />

Es ϕ<br />

= ∑ En{ −ianπn( − i) e + bn( −i)<br />

τ<br />

ne<br />

} =<br />

ρ<br />

+<br />

{( ) 1 ρ<br />

[ ]}<br />

senϕ<br />

n i<br />

= ∑ E −i e a π + b τ<br />

ρ<br />

n n n n n<br />

⎛cos<br />

2ρ<br />

assim, ficamos com as combi<strong>na</strong>ções:<br />

2<br />

⎛cos<br />

ϕ ⎞<br />

⎜ 2 ⎟<br />

⎝ 2ρ<br />

⎠<br />

ϕ ⎞<br />

n+ 1<br />

{() −ρ i<br />

n+<br />

1<br />

iρ<br />

[ ] ( ) [ ] }<br />

* ⎡cosϕ<br />

⎤<br />

EE<br />

iθ<br />

sθ<br />

= ⎢ ∑ En i e πn −τ<br />

n<br />

+ −i π<br />

n<br />

+τ<br />

n<br />

e ⎥×<br />

⎣ 2ρ<br />

⎦<br />

∑<br />

⎡cosϕ<br />

⎢<br />

⎣ ρ<br />

∑<br />

n′ { () −ρ i<br />

n′+<br />

1 −ρ i<br />

() }<br />

* * *<br />

⎤<br />

En′ −ian′ τn′ i e −bn′ τn′ i π<br />

n′<br />

e ⎥ =<br />

⎦<br />

n<br />

{ () + 1 n′ () + 1 − iρ n′<br />

[ ] () + 1 n<br />

() + 1 − iρ<br />

[ ]<br />

EE −a i i e τ π −τ −b i i e π π −τ −<br />

* * 2 * 2<br />

n n′ n′ n′ n n n′ n′<br />

n n<br />

n<br />

( ) + 1 * n′ ( ) + 1 n ′<br />

[ ] () + 1 * n<br />

( ) + 1<br />

i an′ i<br />

n′ n n<br />

i bn′ i<br />

n′<br />

[ n n]}<br />

− τ π +τ − − π π +τ =<br />

n+ 1 n′ + 1 − iρ<br />

n′<br />

+ 1 n+<br />

1<br />

{ −() () [ π −τ ] ⎡ τ + π ⎤−() ( − ) [ π +τ ] ⎡ τ + π ⎤}<br />

2<br />

⎜<br />

* 2 * * * *<br />

2 ⎟ EE<br />

n n′ i i e<br />

n n ⎣an′ n′ bn′ n′ ⎦ i i<br />

n n ⎣an′ n′ bn′ n′<br />

⎦<br />

∑ ⎝ ⎠<br />

* ⎡cosϕ<br />

n<br />

i<br />

( ) ρ<br />

( )<br />

+ 1 n+<br />

1 iρ<br />

{ }<br />

⎤<br />

Es θEiθ<br />

= ⎢ ∑ En − −i anτne −bn −i π<br />

ne<br />

⎥×<br />

⎣ ρ<br />

⎦<br />

⎡cosϕ<br />

⎢<br />

⎣ 2ρ<br />

∑<br />

n′ {( ) + 1 iρ<br />

n′<br />

[ ] () + 1<br />

−iρ<br />

[ ] }<br />

*<br />

⎤<br />

En′ −i e πn′ −τ<br />

n′ + i π<br />

n′ +τ<br />

n′<br />

e ⎥ =<br />

⎦<br />

231

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