Numerical Investigation of the System-Matrix Method for Higher-Order Probe Correction in Spherical Near-Field Antenna Measurements

Figure 7

Error plots of the spherical expansion coefficients computed from the higher-order probe output with 𝜓=2^∘ by truncating the 𝐌 matrix in the presence of Gaussian probe-output noise at the −60dB level. (a) is ℰ_𝐴⁽³⁸⁾_𝑛𝑚 and (b) plot is ℰ_𝐵⁽³⁸⁾_𝑛𝑚.

(a)

(b)