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一、天线的小型化半波振子天线的长度通常为0.95～0.97×2/λ。如果在振子中间插入适当大小电感,就能缩小天线尺寸,并仍然谐振在原来的频率。这是天线小型化方法之一。电感线圈的接入法有两种:一是接在振子中心,一是分别接在两端。前者称中心加载振子,后者称端加载振子(图1)。天线的幅射能量是由天线导体上的电流决定的。半波长振子天线上的驻波电流是:
First, the antenna miniaturization Half-wave dipole antenna length is usually 0.95 ~ 0.97 × 2 / λ. If inserted in the middle of the oscillator inductance of the appropriate size, you can reduce the antenna size, and still resonate at the original frequency. This is one of the antenna miniaturization methods. Inductance coil access method in two ways: First, then connected to the center of the oscillator, one is connected at both ends, respectively. The former says the center loads the vibrator, the latter says the end loading vibrator (Figure 1). The radiated energy of the antenna is determined by the current on the antenna conductor. The standing wave current on the half-wavelength dipole antenna is: