In the above article [1], there was an incorrect statement on antenna pattern related to (1) in Section III-B. The sentence just after (1) should be read as “where $\Psi_{b}$ is the half-power beamwidth divided by 2, $\Psi_{1}=\Psi_{b} \sqrt{-L_{N} / 3}, \Psi_{2}=3.745 \Psi_{b}, X=L_{N}+A \log _{10}\left(\Psi_{2}\right)$ , and $\Psi_{3}=10^{\left(X-L_{F}\right) / A}$ .” The definitions of $\Psi_{b}$ and $\Psi_{3}$ are modified.
