θ

0

π 3

2 π 3

3 π 3

4 π 3

5 π 3 2 π

K1

1

1

1

0

0

0

K2

0

0

1

1

1

0

K3

1

0

0

0

1

1

K4

0

0

0

1

1

1

K5

1

1

0

0

0

1

K6

0

1

1

1

0

0

V 1 ( θ )

E/3

(2/3) × E

E/3

E/3

−2/3E

E/3

V 2 ( θ )

−(2/3) × E

E/3

E/3

(2/3) × E

E/3

E/3

V 3 ( θ )

E/3

E/3

−(2/3) × E

−E/3

E/3

(2/3) × E