单项选择题
Antenna gain is obtained by...? （）
A. A power amplifier in the antenna system B. Concentration of radiation C. Highly effective antenna cables D. Good SWR (Standing Wave Ratio) E. A spherical radiation pattern
单项选择题 Which of the following is an Ericsson scheme to gradually tighten the reuse distance in a network? （）
单项选择题 What does locating mean? （）
单项选择题 Why are base stations sometimes cascade connected? （）
