折迭振子在 VHF/UHF 频段应用较广,有时单独作简便天线,有时作八木天线的有源振子,有时作组成全向天线的单元天线,等等。而在这个频段常以50欧姆或75欧姆同轴电缆作为馈线。因此,同轴电缆对折合振子的馈电问题是天线工作中经常遇到的一个课题。解决的方法是在两者之间插入不平衡——平衡变换器及阻抗变换器。人们熟知的各种变换器如 U Folding vibrators are widely used in the VHF / UHF band, sometimes as a simple antenna alone, sometimes as an active dipole for Yagi antennas, sometimes as a unit antenna making up an omnidirectional antenna, and so on. In this band often 50 ohm or 75 ohm coaxial cable as a feeder. Therefore, the feeding of the coaxial cable to the folded oscillator is a subject frequently encountered in the operation of the antenna. The solution is to insert an imbalance between the two - balun and impedance converter. Well known as a variety of transformers such as U.