色散延遲線 的英文怎麼說
中文拼音 [shǎisǎnyánchíxiàn]
色散延遲線
英文
ddl dispersive delay line-
On the following, on the basis of formulas given above, three kinds of effects due to ionosphere are presented : image shift due to group delay which was caused by the difference between the group velocity and the velocity of light in the ionosphere ; image distortion due to ionospheric dispersion which can create second phase error of lfm signals ; the last, the phase perturbation caused by the irregularities of the ionosphere can reduce the coherent length and affect azimuthal resolution
文中主要研究了電離層的三種影響:信號經過電離層傳播的群延遲引起的成像偏移;電離層的色散效應給線性調頻信號帶來二次相位誤差,導致圖像退化、失真;以及電離層的閃爍、湍流等不規則性引起的信號相位起伏。在此基礎上,比較分析了不同波段、帶寬條件下電離層的影響。On the other hand, a new technology using tunable laser as light source of delay system is proposed, which uses the characteristics of optical fiber material dispersion which means that the refraction index of optical fiber changes along with the difference of transmitting wavelength
另一方面,提出一種通過採用可調諧激光器作為系統光源的技術,利用光纖的材料色散特性即光纖的折射率隨傳輸波長變化而改變的特點,來改變延時光纖中信號存儲的時間,從而達到提高光纖延遲線延時精度的目的。
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