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本文引用输出等效电路,推出了引入阻抗公式。在典型参数下计算了引入阻抗的实部R_(in)和虚部X_(in)随波长变化的曲线。曲线在γ_H/4点处可划分成两个区域,该点的左边R_(in)曲线迅速上升,而右边R_(in)曲线在开始一段20％带宽范围内较平坦。H形变换器截止波长的选择以大于γ_(cH)=(2γ~2_(c?)-γ~2)1/2计算结果为宜。当变换器长度S选择在平坦区域就能获得宽频带的特性。因此在设计宽频带磁控管H形变换器 S=γ_H/4时,γ_H为频带高频端的H形波导波长。这一论断在实际设计的磁控管中得到了证实。
This article references the output equivalent circuit, introduced the introduction of impedance formula. Under the typical parameters, the curves of the real part R_ (in) and the imaginary part X_ (in) of the incoming impedance with wavelength are calculated. The curve can be divided into two regions at γ_H / 4, the R_ (in) curve of the left increases quickly, and the R_ (in) curve of the right is flatter in the first 20% of the bandwidth. The choice of cutoff wavelength of H-type converter is more than γ_ (cH) = (2γ ~ 2_ (c ~) - γ ~ 2) 1/2. When the converter length S is selected in a flat area, a broadband characteristic can be obtained. Therefore, in the design of a wideband magnetron H-type converter S = γ_H / 4, γ_H is the H-band waveguide wavelength at the high frequency side of the band. This assertion in the actual design of the magnetron has been confirmed.