一、前言八木天线因有种种优点目前应用仍很广泛,其有源振子国内多用折合振子形式,用对称双线或用同轴线经过不平衡——平衡转换器和变阻器进行馈电。这种馈电形式,解决避雷问题有时仍感有些不便,匹配调整也不够灵活,工艺结构上需要弯制折合振子。一个时期以来 I. Introduction Yagi antenna is widely used due to various advantages. Its active oscillator is mostly used in the domestic form of the oscillator. It is fed by unbalanced-balanced converter and rheostat with symmetrical two-wire or coaxial cables. This feed form, to solve the problem of lightning is sometimes still feel a little inconvenience, matching adjustment is not flexible enough, the structure of the process needs bending bending oscillator. Since a period