谐振腔

The method is based on the principle of automatic frequency tunning, i.e.

所用的方法基于自动频率微调的原理，即利用一套鉴频系统使反射速调管的振荡频率自动地跟踪到被测腔的谐振频率。

A computing model was constructed by using ANSYS on personal compeers to study the RF resonant frequency and quality factor. The influence of the tuning capacitor gap,the cavity mesh and the model construction method were also discussed.

以PC机为平台，采用ANSYS软件进行建模，对腔体的谐振频率、空载品质因数进行了研究，探讨了微调电容间距、网格剖分精度以及建模方法对计算结果的影响。

Several typical cavities containing gratings, etalons and resonant reflector as frequency selective elements are studied.

对包括有单、双光栅、标准具和谐振反射器等选频元件的几种典型腔进行了研究。

Also it is found that when the reflectivities of two antireflection and high-reflection coatings increase, and the stable oscillation of the master wave is established in the external cavity, the threshold current is the lowest, but the efficiency of the electro-optical conversion and the power of the output light reduce sharply.

并且发现当两端面的反射率增加，同时激射波长在外腔长度中形成稳定谐振时，激光器的阈值电流达到最小值，但相应的电光转换效率和出光功率会急剧地减小。

Large windows in the basket both above and below the spider reduce sound reflection, air flow noise and cavity resonance to a minimum.

合金盆架上较大的镂空设计使回声、气流噪声和空腔谐振等降低到最低水平。

Compared with Figure 6, one can see, as time progresses, the time Reverberation-Chamber fluctuations reduce the average electric field value, and gradually become stable, while the rectangular cavity resonance due to its role in the convergence very slow wave, volatile .

通过与图6比较，可以看出，随着时间的推进，混波室的时间平均电场值波动减小，逐渐趋于稳定，而矩形空腔由于其谐振作用，波形收敛很慢，波动很大。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。