The inevitable objection raised, is that the apparently closed system produced by this arrangement cannot result in an output force, but will merely produce strain within the waveguide walls.
必定有人提出反对意见：显然，封闭系统不能输出对外的推力，但只会产生应变在波导内墙壁。
The cutoff wavelength of ridge waveguide is very closed to the ridge position. It can be changed by changing the ridge position.
脊波导的截止波长与脊位置密切相关，其值可通过脊位置的改变而改变。
The coplanar waveguide on the substrate with finite dimensions is a physical model which is very closed to the engineering situation.
有限尺寸介质基片上的共面波导是一种非常接近于工程应用状态的物理模型。
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