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Table 3 Parameters of piecewise linear function for fitting real parts in Eq. (25) with p = 4 and q = 4

From: Effect of Facet Displacement on Radiation Field and Its Application for Panel Adjustment of Large Reflector Antenna

Amount of piecewise lines p

Phase error δ/rad

Path length error ɛ/λ

Parameter a

Parameter b

Fitting error e

1

[−3.14, −1.86)

[−0.250, −0.148)

0.977 8

0.713 4

0.049 4

2

[−1.86, −1.58)

[−0.148, −0.126)

1.562 3

0.995 5

0.011 9

3

[−1.58, −1.49)

[−0.126, −0.119)

1.574 6

1.003

0.04

4

[−1.49, −0.73)

[−0.119, −0.058)

1.413 9

0.883 1

0.049 3

5

[−0.73, 0.37)

[−0.058, 0.029)

0.965 4

0.173 6

0.049 4

6

[0.37, 1.32)

[0.029, 0.105)

1.256 2

−0.731

0.048 2

7

[1.32, 1.56)

[0.105, 0.124)

1.558 8

−0.992 5

0.012 5

8

[1.56, 1.68)

[0.124, 0.134)

1.576 2

−1.004

0.040 6

9

[1.68, 2.61)

[0.134, 0.208)

1.327

−0.87

0.048 9

10

[2.61, 4.1)

[0.208, 0.326)

1.167 3

−0.765 6

0.049 6