wide-band ratio 中文意思是什麼

wide-band ratio 解釋
寬帶比
  • wide : adj （opp narrow）1 寬闊的。 2 廣闊的，廣大的，寬敞的。3 廣博的；范圍廣大的；廣泛的。4 遠離的；（...
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  • ratio : n. （pl. ratios）1. 比，比率，比值；比例；系數。2. 【經濟學】復本位制中金銀的法定比價。vt. 1. 用比例方式表達；求出…的比值；使…成比例。2. 將（相片）按比例放大或縮小。
  1. Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results

    文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合
  2. The specifications of the intensity modulator at 1. 3 m involved with extinction ratio better than 25 db, and low drive voltage, and wide operation band width and so on

    該強度調制器工作於1 . 3 m ，具有大於25db的消光比、低驅動電壓、寬工作帶寬的特點。
  3. The specifications of the intensity modulator at 1. 054 m involved with extinction ratio better than 50 db, and low drive voltage, and wide operation band width and so on

    該強度調制器工作於1 . 054 m ，具有大於50db的消光比、低驅動電壓、寬工作帶寬的特點。
  4. ( 5 ) based on subspace orthogonal algorithm, a method for estimating the parameters of wide - band chirp signal is studied. it is shown that accurate estimation can be obtained for wide - band chirp signal even under low signal - to - noise ratio ( snr )

    （ 6 ）基於dft原理和fft技術，提出了適用於非高斯噪聲環境的線性調頻參數估計的快速離散chirp傅立葉變換（ dcft ）演算法。
  5. At last, in term of the property of wide band of fra, the interference between channels of multi - channel amplification system is discussed. in multi - channel system, the relations between signal - interference ratio and input signal wave power, between signal - interference ratio and the number of channel and between signal - interference ratio and gain of fra have be discussed. the way of restraining the interference is produced

    最後結合喇曼放大器寬帶寬的特性討論了在多通道系統中光纖喇曼放大器的串擾問題，研究了在多通道系統情況下，系統中的信擾比與信號輸入光功率、通道數以及放大器增益之間的關系，並提出了減小此串擾的方法。
  6. The reflection, contrast ratio and polarization direction are calculated in the wavelength of 633nm and in wide band wavelength, which represent the applications in the optical information process and the projection display

    分析計算了633nm以及寬波長下液晶的反射率、對比度以及偏振光的工作角度。獲得了用於信息處理以及用於投影顯示的液晶工作曲線。
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