The impedance matchingnetwork of changeable load and wide-belt is required because the input impedance of spiral antenna changes with frequency.
由于该天线的输入阻抗随频率而变化，需要用一个宽带变负载阻抗匹配网络来实现天线与电台之间的匹配。
2
A voltage adjustment method based on bus-type extended load flow was presented firstly. After that, the deficiency in traditional network power flow matching methods was well analyzed.