The analysis shows that the TVA is a pure resistive antenna with a higher input impedance than that of corresponding EVA.
分析表明，三角板天线是一种纯阻性天线，其输入阻抗值比较大。
It is a voltage-controlled device with high input impedance, which makes it possible to control higher output power with a lower input voltage.
它具有输入阻抗高、电压控制和用低压控制大功率输出的特点。
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