说明：  天线理论与设计，经典教材，是中文版的，读起来不费力，可以与英文版的对比着看，这里分享希望大家作学习用，不用作商业用途。
(Antenna theory and design, the classic textbooks, the Chinese version of the reading is not laborious, can be compared with the English version of the look here to share hope that we use for learning, not for commercial purposes.)