coplanar electrodes 中文意思是什麼
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In this modulator, coplanar strips ( cps ) are used as electrodes for they support balance mode propagation of microwave, and this is a desired merit for common optical modulator. due to the miniaturized dimensions, the metallization thickness is in the order of skin depth and the conductor losses are not negligible
雖然由於金屬的趨膚效應，電場將集中在金屬表面，但在40g以上的頻率條件下，金屬的厚度和趨膚深度在一個量級，而且此時調制器帶寬受到限制的最大根源來源於金屬電極的微波損耗。 -
The cross section of modulator electrodes we study is trapezoidal but not rectangular in common, so it is necessary to make an analysis of the effects of trapezoidal electrodes on the characteristics of coplanar waveguide
由於實際的電極橫截面形狀是梯形而非理想的矩形結構，研究梯形電極中間電極角度和地電極角度對調制器特徵參量影響是十分有必要的。 -
It has been shown by our calculations that conductor loss is greatly reduced under velocity matching with relatively thick coplanar waveguide electrodes and thick buffer layer, but the characteristic impedance can not match with that of the external circuit at the same time, and the modulation bandwidth is confined in this case
然後，用一般的橢圓積分計算了普通共面波導型調制器的有效折射率、特徵阻抗和導體損耗系數。通過計算發現，採用厚電極和厚緩沖層結構，在實現速度匹配的情況下，可以大大減小導體損耗，但是由於阻抗不能同時滿足匹配，調制帶寬受到限制。
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