band center frequency 中文意思是什麼

band center frequency 解釋
帶中心頻率
  • 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；...
  • center : n vt vi 〈美國〉＝centre n 1 中心；中心點；圓心；中央；中樞，核心；中心人物；根源，起源。2 〈常C ...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. The center frequency of the vco is 28. 8ghz and the band width is about 20 mhz

    經過測試，得到振蕩頻率為28 . 8ghz ，調頻帶寬20mhz ，與期望結果相差較大。
  2. The center frequency of the vco is 14. 14ghz with band width of more than 100mhz. the output power is 2 ~ 6mw

    根據測試結果，該vco電路的中心頻率為14 . 14ghz ，調頻帶寬大於100mhz ，帶內輸出功率在2 6mw之間。
  3. By making full use of favourable narrow - band tracing filter character of pll and by combining the merits of dds such as super fine frequency resolution 、 high frequency accuracy 、 very fast frequency hoping with it, the pll / pll + dds frequency synthesizer presents wide band high quality source and super small frequency hoping step. while the electronically tuned filter abates the image interference and notably improves the selectivity. the theorem of frequency synthesizer and center - frequency - fixed filter is simply but adequately introduced first in this paper

    課題中所採用的pll或dds pll鎖相頻率合成方法充分發揮鎖相環良好的窄帶跟蹤濾波特性，並結合dds的高頻率解析度、高頻率精確度和高速頻率捷變等優點，分別實現了系統所要求的高質量寬帶本振源和小步長頻率捷變；採用電調諧選頻技術，則大大改善了接收機的選擇性和抗干擾能力。
  4. The circular monopole ultra - wideband antenna has not only the extremely wide band in frequency domain, but also stable phase center, which makes the antenna radiate and receive the short pulse signals without any distortion, and suitable for various ultra - wideband communication systems or the single antenna of other multi - frequency operating communication systems

    這種天線不僅具有極寬的阻抗帶寬，還擁有穩定的相位中心。這使得圓盤單極超寬帶天線可以不失真地收發時域短脈沖信號。所以該天線不僅適用於超寬帶通信中，還能夠作為復雜多頻工作系統的單一收發天線。
  5. In this thesis, complex analytical band - pass filtering based method is proposed to reduce the modulation complexity ; polyphase decomposition is used to reduce the filtering complexity ; uniform dft filter banks based method exploits the center frequency distribution characteristic of filter banks to reduces the modulation and spectral resort processes

    而基於均勻dft濾波器組的演算法充分利用了濾波器組的中心頻率的分佈特點，省略了復頻移環節和整序環節，同時利用多相分解的方法改善了濾波環節，兼有各種方法的優點而大大的提高了演算法的實時性。
  6. In the third chapter, a methodologies to realize second - order band - pass filter with which center frequency tuned in a wide range using mcdi ( multiple output current - mode differential integrator ), these two kinds of mcdi are composed of pmos and nmos input transistors respectively, lastly we compare these two integrators " merits and disadvantages

    第三章：提出了輸入級分別為pmos管、 nmos管的多輸出端電流模式全差分積分器，並由此構成了中心頻率連續可調的二階帶通濾波器，同時比較了二者的優缺點。
  7. The antenna is obtained by extending the longitudinal strip of the fin - line, and etched on a metallized dielectric substrate. it is operating at ka band ( center frequency : 34ghz ), which has a good agreement between simulated and measured results. its e - and h - plane 3db main lobe beamwidth are 79. 25 and 80. 03 degrees respectively with sidelobes less than - 10db

    天線工作的中心頻率為34ghz ， e面和h面測試方向圖主瓣寬度分別為79 . 25o和80 . 03o ，旁瓣電平均小於- 10的db ，模擬和試驗結果基本一致，所設計天線的各項指標經測試基本達到要求。
  8. Specialties : the range of center frequency it can achieve is bigger than one - piece filter ; at the time it has the features of wide pass - band, low insertion loss and high restraint outside the band

    特點：可實現的中心頻率范圍較單片濾波器寬，通帶寬度范圍大，插入損耗小，帶外抑制高。
  9. In this paper, the evolution equations of the parameters of the optical soliton pulses were derived by means of variational method, in order to investigate the influence of the fifth - order nonlinear effect on the transmission properties of optical soliton in the coupling fiber, and the effects of the fifth - order nonlinearity were discussed on amplitude, frequency band width, chirp, frequency, center position and phase

    摘要運用變分法導出五階非線性作用下孤子的參數演化方程組，研究五階非線性耦合光纖中孤子的傳輸特性，討論五階非線性效應對孤子的振幅，頻寬，啁啾，頻率，中心位置及相位的影響。
  10. The beijing karmel culture art development center is engaged in the domestic and foreign large - scale displays, the demonstration design manufacture, the display equipment manufacture sale and rental, the opening ceremony booth build, the opening ceremony cuts the ribbon, the etiquette service, the military band performance, the basket of flowers bouquet of flowers, the furniture rents, the celebrity manages, the dragon dance lion dance, the imposing percussion instrument, the light sound, the lift - off balloon, the balloon releases for flight, the fireworks salute, the cartoon arched entrance, the model manufacture, the sash colored flag, the scroll theater curtain, balloon printing, each kind of orchestra, the scene arrangement, the chinese dress rents, stage dance america, the video frequency projection, the sound amplifies, simultaneous interpretation and so on a series of services

    北京卡梅爾文化藝術發展中心是從事國內外大型展覽、展示設計製作、展覽器材製作租售、開幕式的展臺搭建、開幕式的剪綵、禮儀服務、軍樂隊演奏、花籃花束、桌椅租賃、名人主持、舞龍舞獅、威風鑼鼓、燈光音響、升空氣球、氣球放飛、禮花禮炮、卡通拱門、模型製作、授帶彩旗、條幅幕布、氣球印刷、各種樂隊、場景布置、旗袍租賃、舞臺舞美、視頻投影、音響擴音、同聲傳譯等一系列的服務。
  11. Thinning the crystal grain and increasing the center vent are effective approach to raise the limiting frequency of high permeability mnzn ferrite. through large quantities of experiments, we made progress in raising limiting frequency of high permeability mnzn ferrite. we prepared the broad band mnzn ferrite of which the initial permeability was 10000

    通過採用上述實驗中的優化配方、添加劑組合以及制備工藝，我們在高磁導率材料的寬頻特性方面取得了很大的進展，研製出了起始磁導率磁導率為10000的寬頻mnzn鐵氧體材料，當頻率達到300khz時，起始磁導率下降不到20 % ，其性能相當于epcos公司改進的t38材料。
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