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一、引言加载横向磁化H面铁氧体的矩形波导非互易移相器能承受很高的脈冲功率和平均功率,通常用作四端差相移式波导环行器的组成元件。在高功率变极化器及分功率器中也获得了应用。在研制设计这些器件时,需要估算移相器的相位常数等问题。但是,严格求解这种加载波导的场方程是很困难的。加载的铁氧体样品横截面比波导口径小得多,它不致使波导的传输波型发生严重畸变,因此可以用微扰法求近似解。微扰法所得结果的准确性取决于远用的微扰场是否切合实际。通常对铁氧体内场采用准静态近似,其结果仅当铁氧体片很薄时与实验符合,在移相器的样品的实际厚度情况下,与实验之间
I. INTRODUCTION Rectangular waveguide non-reciprocal phase shifters with transverse magnetized H-plane ferrite can withstand very high pulse power and average power and are usually used as the components of the four-terminal differential phase shift waveguide circulator. In the high-power variable polarization device and sub-power also received applications. In the development and design of these devices, need to estimate the phase-phase shifter and other issues. However, it is very difficult to solve such a field equation of the loaded waveguide strictly. The cross section of the ferrite sample loaded is much smaller than the waveguide diameter, so it does not cause serious distortion of the waveguide transmission waveforms, so the approximate solution can be obtained using the perturbation method. The accuracy of the results obtained by the perturbation method depends on whether the far-used perturbation field is realistic or not. Quasi-static approximation of the ferrite inner field is usually used, the result of which is consistent with the experiment only when the ferrite sheet is very thin. Between the actual thickness of the sample of the phase shifter and the experiment