attenuation band 中文意思是什麼

attenuation band 解釋
衰減頻帶
  • attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
  • 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；...
  1. Two kinds of filters are presented : by transferring the conventional waveguide cavity filter to the siw, a narrow bandstop filter is designed and simulated, get characteristic of narrow - band bandstop filtering. for example, relative bandwidth 1. 2 %, most attenuation of 48db in band. electromagnetic bandgap ( ebg ) structures present “ forbidden band ” characteristics, siw features high - pass characteristics, so bandpass filters can be composed by combing ebg and siw

    本論文提出了兩種基片集成波導濾波器結構:將傳統的腔體濾波器概念運用於基片集成波導結構，設計出了一種窄帶帶阻濾波器，對其進行模擬，得到了窄帶帶阻濾波特性，如相對帶寬為1 . 2 % ，最大衰減為48db 。
  2. According to statistics parameters of the typical clouds over xi ' an region and cloud data obtained from the global distribution of cloud cover under the auspices of world meteorological organization, for xi ' an region typical cloud, the parameters of khragian - mazin cloud drop size distribution are obtained. based on xi ' an cloud water content profile, on earth - space paths, attenuation due to cloud are calculated by means of the k - m distribution. it is shown that the attenuation induced by cloud are taken into account at ka - at elevation angle smaller than 30 and v - band paths

    第三，根據西安地區氣象觀測數據，討論了西安典型雲的宏觀和微觀物理特性；根據西安典型雲的觀測結果和世界氣象組織提供的數據，得到西安典型雲的k - m雲滴譜參數；並根據西安地區雲的液水含量，計算了地一空路徑上雲的衰減，結果表明，在v波段和仰角小於30度的ka波段路徑，雲的衰減需加以考慮。
  3. Abstract : from a universal formula for calculating the attenuation cross section of particles in arbitrary shapes, exact expressions for calcualting the attenuation cross section of polydisperse, small spheroids, whose rotary axes are in specific status, have been derived. attenuation cross sections of both liquid and ice particles in different shapes at different wavelengths in microwave band have been computed and analyzed. the results are informative to microwave remote sensing of precipitation

    文摘:從計算任意形狀粒子的衰減截面普遍公式出發，推導出了小旋轉橢球粒子群旋轉軸處于不同狀態時的衰減截面函數表達式，並計算分析各種狀態下衰減截面隨降水粒子相態、形狀和入射波波長的變化特徵，所得結果可用於降水微波遙感。
  4. The experimental study is performed on the c - band tapered milo designed with the help of the simulation. the whole system is calibrated separately by parts. from milo to microwave receiving hom, the special system is simplified to be a two - port network and its s parameter is measured to calculate the attenuation factor a

    對于微波功率的標定問題，我們根掘實驗條件，將整個系統劃分為幾個部分分別進行了標定，包括：從milo到接收喇叭組成的特定系統，將該特定系統簡化為一雙口網路，並測量出了其s參數，從而計算出與頻率密切相關的衰減量a ；對固定衰減器在不同微波頻率下的衰減量進行了標定。
  5. At the same time, the power capacity of the above mentioned antenna is preliminarily analyzed. the results show that in the pass band, their power capacities increase with the frequency on the whole, ranging from 10 ’ s kw to 100 ’ s kw. with the change of the pulse duration of microwaves, the measurement is carried out on the sensitivity of the detectors of the types wb - cd01 and 2087 - 6001 - 00, on the attenuation of the

    通過調整微波脈寬，對wb - cd01型、 2087 - 6001 - 00型等檢波器的靈敏度，對2082 - 4137系列和tts系列衰減器的衰減量，對rg - 142型微波電纜的衰減量進行了實驗測定，結果表明:在微波脈寬大於40ns時，檢波器靈敏度基本無變化;當微波脈寬在20 ~ 40ns時，檢波器靈敏度會有一定變化，變化趨勢和程度與檢波器的型號有關;而上述型號的衰減器和微波電纜的衰減量幾乎不受微波脈寬的影響。
  6. The attenuation function curve of the new prototype with different number of resonance components is drawn in the whole frequency band, all the components ' parameters are calculated out

    繪制出新的低通濾波器原型整個頻帶內不同節數時的衰減特性，計算出不同節數時原型各節參數。
  7. The performance of filters is not very good. the attenuation of stop - band is almost - 44db. the performance cannot satisfy the requirement for some application situation

    其阻帶衰減大約在- 44db ，對於一些對濾波器阻帶性能要求較高的應用場合，這個數值是達不到要求的。
  8. Bessel function design simulation results show the small pass - band ups, stop - band attenuation, in the pass - band with a better group delay characteristics, which can meet the design requirements

    模擬結果表明貝塞爾函數設計的濾波器通帶起伏小，阻帶衰減大，在通帶內群延遲特性較好，可以很好滿足設計要求。
  9. Applying the method of this article, we can get that the attenuation of stop - band is - 75db and the error of reconstruction is 0. 0015. the simulation program and experiment result are provided. the correctness and validity are proved

    用本文的方法，在重構誤差將近千分之一的情況下，取得了較好的濾波器特性，其阻帶衰減達到- 75db ，文中給出了matlab實驗程序及結果，並通過simulink模擬，證明了這種方法的正確性與有效性。
  10. A novel e - plane metal insert waveguide filter is presented in this paper. comparing to conventional e - plane waveguide filter, great improvments have been made in stop - band attenuation of a bpf

    為了提高e面全金屬膜片矩形波導濾波器的阻帶性能，本文對濾波器的結構做了改進，採用了混合膜片的形式。
  11. Band elimination filter. a filter that has a single continuous attenuation band, with neither the upper nor lower cut - off frequencies being zero or infinite

    帶阻濾波器。只有單個連續衰減帶寬，將在上邊帶或下邊帶頻率切斷為零或無窮大。
  12. Then the transform method and the digital broad - band data from china is applied to obtain the wide period attenuation relationships for horizontal acceleration response spectra of eastern china and western china in rock sites ( c, = 5 % )

    最後用常規的轉換方法，並加入我國158條水平向寬頻帶數字記錄，建立了中國東部和西部地區的水平向基巖寬周期（ t = 0 . 04 - 20s ， = 5 ）加速度反應譜衰減關系。
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