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在我国超高频电视广播开发之前,我们已研制了一只超高频四极管8F63R以及与它相配合的空腔谐振器,以用作广播发射机的功率级。本文介绍的空腔谐振器,其工作频率是在较低的超高频电视频段(470～570 MC)。它的输出带宽是8MC(-0.5dB),它的输出功率是2KW。为了获得宽的输出带宽,采用了双调谐线路。在设计过程中,初级和次级腔体的特性是分别计算的。两个腔体用一个耦合窗相互耦合起来。调谐频率的调节不是活塞的形式而是半固定的,并且从侧壁仅能进行微调。输入腔作成一个(3λ)/4谐振线路,其微调谐也从侧壁进行。腔体在连续波条件下的试验表明在线性度和频带宽度方面具有令人满意的结果。同样地,在管子冷却中所得的测量值是有足够余量的。
Prior to the development of UHF television in our country, we have developed a UHF quadrupole 8F63R and its associated cavity resonator to be used as a power stage for broadcast transmitters. This article describes the cavity resonator, its operating frequency is in the lower UHF television band (470 ~ 570 MC). Its output bandwidth is 8MC (-0.5dB), its output power is 2KW. In order to obtain a wide output bandwidth, the use of dual-tuned line. In the design process, the characteristics of the primary and secondary cavities are calculated separately. The two cavities are coupled together by a coupling window. The adjustment of the tuning frequency is not semi-permanent in the form of a piston, but only fine adjustments can be made from the side wall. The input cavity creates a (3λ) / 4 resonant line with fine tuning also going from the sidewalls. Experiments of the cavity under continuous wave conditions have shown satisfactory results in terms of linearity and bandwidth. Likewise, there is enough margin for the measurements taken during tube cooling.