高品质因数谐振腔的储能过程和泄能过程

Storing and dumping processes of energy in high quality factor resonant cavity

为了计算高品质因数谐振腔的储能过程和泄能过程,将高品质因数谐振腔的输入膜片和输出结构分别建模为一个二端口网络和一个三端口网络,根据高品质因数谐振腔的信号流图,提出了一种基于递推的数值计算方法。用该方法设计了一个工作在2.92 GHz附近的基于BJ32波导的高品质因数谐振腔,给出了谐振腔的储能过程和泄能过程。当输入膜片开口宽度取20 mm、输出膜片开口宽度取60 mm时,计算得出的谐振频率为2.9198 GHz,饱和储能时间为2.6μs,输出脉冲宽度6.82 ns,输出峰值增益为129.6,能量效率为0.169。

In order to calculate the storing process and dumping process of energy in high quality factor resonant cavity,the input iris and the output coupling structure are modeled as a 2-port net and a 3-port net respectively,and an algorithm based on iteration is proposed according to the signal flow graph of the high quality factor resonant cavity.The algorithm is then used to design a high quality factor resonant cavity working around2.92 GHz and based on rectangular waveguide of type BJ32.When the width of the input iris takes 20 mm and the width of the output iris takes 60 mm,the resonant frequency,the storing time,the pulse width of the output pulse,the peak output power gain and the energy efficiency are calculated to be 2.9198 GHz,2.6μs,6.82 ns,129.6 and 0.169,respectively.