working band 中文意思是什麼

working band 解釋
工作頻帶
  • working : adj 1 工作的，從事勞動的。2 操作的，作業的。3 工人的。4 （用於）實際工作的，任事的；使用（中）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；...
  1. Mixers are the key components of many microwave and millimeter - wave systems. the super - heterodyne receiver is always applied in modern communication system, mixer becomes the key component as is at the first part of system. but it is more and more difficult to get the choiceness lo source of the same band with the system is working at high frequency especially in the millimeter - wave. sub - harmonic mixer is a good solution to this problem now. in this circuit we need just half 、 quarter 、 even 1 / 8 of the rf signal frequency. in this paper the design and fabricate of sub - harmonic hmic mixers ( 2, 4 ) at w - band are introduced

    混頻器是微波通信、射電天文學、雷達、等離子物理、遙控、遙感、電子對抗，以及許多微波測量系統中至關重要的部件。在現代通信系統中，毫米波頻段通常採用超外差接收機，混頻器作為第一級就成為關鍵部件。由於在毫米波頻段，同頻段高性能的本振源成本高，技術難度大，採用分諧波混頻技術是解決此問題的有效途徑，只需射頻頻率1 / 2 、 1 / 4甚至1 / 8的本振頻率即可實現混頻。
  2. After elaborating the principle of an 802. lib key modulation scheme - complementary code keying ( cck ), this paper proposes and realizes a hardware circuit solution of 802. 11b pcmcia wlan interface card, which can reliably offer a maximal 11mbps data rate and freely switch within 14 working channels in 2. 4ghz frequency band

    接著在詳細闡述了802 . 11b協議核心調制技術?互補碼鍵控（ cck ）的原理的基礎上，本文提出並實現了一種峰值傳輸速率為11mbps的802 . 11bpcmcia高速無線網卡的硬體電路設計方案，在2 . 4ghz頻段該網卡可在14個工作通道上自動切換，實現高速突發數據的可靠傳輸。
  3. Airborne synthetic aperture radar ( sar ) is a kind of active remote sensor, which works in the microwave band and takes aircraft as the working platform

    機載合成孔徑雷達是一種以飛行器為平臺，工作在微波波段的主動式遙感器。
  4. This paper starts the research of the liquid floated pendulous accelerometer testing system according to the engineering. at first, this paper gives the brief introduction of the history and present status of accelerometer and its testing technology, the working principium and math model of the liquid floated pendu - lous accelerometer, and then, decides the binary width pulse force retrim loop as the design proposal of testing system, researches the transfer function of every part in the system emphasizly, analyses the stability of the whole accelerometer testing system from the angle of control theoretics by the open loop transfer function of system, and designed the correcting net, analyses the basal problems such as resolution, sampling restraint, precision and so on, designs the hardware testing circuits such as preamplification, band - pass filter, alternating amplifier, phase sensitive demodulatorn, pulse - width modulation, frequency scale circuit, moment current generator. finally, using the graphics program language labv - iew which is designed for testing field especially by ni accomplishes the solfware design of testing system, realized the testing functions

    首先對加速度計及其測試技術的發展歷史和現狀，液浮擺式加速度計的工作原理和數學模型等作了簡要的介紹，然後確定了以二元調寬脈沖再平衡測試迴路為設計方案，並從控制理論的角度進行了分析，著重研究了系統中各部分的傳遞函數，利用系統開環傳遞函數分析了系統的穩定性，同時設計了系統的校正網路;分析了二元調寬脈沖再平衡測試迴路的解析度、采樣約束以及測試精度等基本問題，並按照系統分析的結果設計了包括前置放大、帶通濾波、交流放大、相敏解調、脈寬調制、頻標電路以及力矩電流發生器等測試系統各部分硬體電路，驗證了電路的正確性，最後按照測試系統的要求，採用了美國ni公司專為測試領域所開發的虛擬儀器工具? ? labview作為測試軟體開發工具，利用該圖形化編程語言完成了測試系統軟體部分的設計，實現了測試功能。
  5. After analyze the theory about w - band millimeter integrate oscillator, using impatt diode come from russia, we manufacture the w - band cw integrate oscillator. it is first domestic w - band millimeter integrate oscillator using impatt diode. the oscillator ' s output power is exceeding 7mw, working at 94. 785ghz

    通過對三毫米集成振蕩源進行理論分析和實驗研究，最終在國內首次採用從俄羅斯引進的三毫米連續波雪崩二極體研製成功w波段微帶集成振蕩源，工作頻率為94 . 785ghz ，輸出功率大於7mw 。
  6. In the first part, the basic knowledge of particle scattering in meteorology and physics was introduced. the particles to be discussed include aerosol particles, fog droplets and raindrops and the em wave band in the discussion is near - infrared. in the second part, the mie theory was briefly reviewed and was applied to investigate the scattering characteristics of spherical atmospheric particles, the result shows that in the visibility measurement meter using forward - scattering method, when the working wavelegth is between 0. 8 m ~ 2 m, the scattering angle is between 25 ~ 40, the distinguishability and the relative scattering intensity would be better than those under other conditions. in the third part, the superellipsoid was used to describe a wide range of shapes such as spheres. ellipsoids and cylinders. an improved t - matrix method which can be used to calculate arbitry shaped particle ' s scattering field was introduced, and the scattering characteristics of non - spherical atmospheric particles was investigated with this method

    計算結果表明，從相對散射強度、同一方向上不同粒子散射的可區分程度來看，在散射式能見度探測儀器中，工作波長介於0 . 86 m 2 m ，探測角度選取前向25度40度時，探測的結果將會是比較理想的。第三部分中，使用超橢球方程來統一描述各種非球形粒子的形狀，然後使用t矩陣方法計算了一些形狀的非球形粒子的近紅外散射特性。另外，在本文中還針對球形粒子的散射場提供了一種三維可視化方法，使對散射場強度的空間分佈的理解更加簡單，直觀。
  7. The most convenience of the wlan service felt by news reporters, the main users, is that in the reporting rooms on the stand or in their working rooms, they can directly send text manuscript and images screened by digital camera to the newsroom through wlan wide band network. in the past, this is usually done when they come back to hotel or the news center to dial on the net. so the wireless wide band network service greatly reduced the time during which the reporters must wait for manuscript transmission

    記者作為這次wlan業務的主要用戶，他們感受到的主要方便之處在於：在看臺記者席、記者工作間可以直接通過wlan寬帶無線網路將文字稿件和數字相機拍攝的圖片發送到編輯部，而在此前記者多是回到旅館或在新聞中心利用電話撥號上網發稿，無線寬帶上網業務極大地縮短了記者的發稿等待時間。
  8. Another aspect of this paper is to expand the working band of hartmann - shack wavefront sensor through frequency transfer of nonlinear optics

    另一方面，我們又對利用非線性光學頻率變換方法拓寬探測器件的響應波段，做了探索性的工作。
  9. Finally introduced the method that use adf4113 and provied the real test result of this multi - frequency, low phase noise pll frequency synthesizer with 30mhz working band and 1mhz frequency step. in addition, some method that solved the problem often occurred was introduced

    最後給出了由ad公司的電流泵數字鑒頻鑒相器adf4113和無源環路濾波器構成的頻率合成器的控制方法和實驗測試結果，實現了工作帶寬30mhz ，頻率步進1mhz的多點頻、低相噪頻率合成器。
  10. In this paper, direct modulation technology working at microwave band is researched

    本文研究的是微波波段的直接調制技術。
  11. Laizhou guangyun machinery co., ltd. laizhou guangyun machinery co., ltd, an private enterprise which intergrates science, manufacture and trade. it covers an area of 10000m2, has 100 staffs. with advanced and exactitude exam equipments and modern management systerm, we specialized in manufacturing wood - working machine, such as log splitter, circular saw ls400, vertical log splitter, planer thicknesser and so on. the log splitter which model is 52cm, 37cm, and the force can be reached 4t, 5t, 6t ; cutting machine includes metal cutting band saw, marble cutting machine besides dust - collector, multi - function mixer, motor, shieding pressure - pump and so on. the product is sold all over the whole country, and exported to europe, america, east - north asia ect. most products have been certified successively by international safety seanclards which are european economic community ce, germany gs ect.

    公司員工100餘人，佔地面積10000m2 ，擁有先進精密的製造檢測設備和現代化的科學管理制度，專業生產木工機械： ls - 370 ls - 520型號的劈木機400圓木鋸立式劈木機木工刨床等，切割機械：金屬帶鋸機理石切割機等，以及集塵器攪拌機電機屏蔽增壓泵等，產品遠銷全國各地並出口歐美東南亞等20多個國家和地區。
  12. Two cold - test parameters determine the working voltage, frequency band, efficiency and gain of twt. they are dispersion and interaction impedance of the slow - wave structures ( sws ) in twt, which are very important targets for twt

    行波管慢波結構的色散和耦合阻抗是行波管設計中兩個非常重要的冷參量，它們決定了整支管子的工作電壓、頻帶寬度、工作效率和增益。
  13. So, we must research and develop a kind of receiver with good expansibility that the working frequency band is wide, and the adaptive capacity of the wave form is strong

    所以，必須要研究開發一種工作頻段寬，波形適應能力強，可擴展性好的接收機。
  14. The millimeter wave diplexers used in the ka - band satellite communications are investigated. these diplexers are of high working frequency, narrow passband and high selectivity, which demands the channel filters good performance

    所研究的毫米波雙工器工作頻率高（接近40ghz ） ，收發通道帶寬窄、接收頻率和發射頻率間隔很小。
  15. But ridged waveguide antenna which is small in volume when working at a low frequency band can obtain a high resolution and is suitable in the rubber material measure. one of the features of the paper is that some improvements of fdtd are presented

    脊波導天線與普通金屬波導相比，在較低的頻域可以有較小的工作尺寸，因而能達到較高的解析度，且便於與同軸饋線連接，很適合用於橡膠吸收材料的測量中。
  16. We have researched the integration oscillator working at millimeter wave band

    本文開展了毫米波集成振蕩源的研究工作。
  17. In this paper, a pll frequency synthesizer working in l band is researched. at fist, we review the basic of phase lock loop and it ' s constituent part. after that the basic conception and design method of pll frequency synthesizer was introduced, especially introduced the charge pump pll frequency synthesizer in detail

    本文是採用鎖相原理設計的l波段頻率合成器，首先對鎖相環路的工作原理和基本組成部分進行了簡單的介紹，然後介紹了鎖相頻率合成器的原理和設計方法，主要介紹了目前小型頻率合成器產品中使用最廣泛的由電荷泵數字鑒頻鑒相器和無源環路濾波器構成的頻率合成器。
  18. In order to increase the efficiency on using limited frequency resource, orthogonal polarization is normally adopted for frequency reuse, thus offering double bandwidth at the certain working band

    為了充分利用有限的頻譜資源，衛星通信採用正交極化頻率復用方式，在給定的工作頻段上提供雙倍的使用帶寬。
  19. At the same time, we have manufactured a transition from microstrip line to rectangle waveguide, working in full ka - band. the insert loss of a single transition is between 0. 25db and 1db

    同時，完成了ka全頻段微帶波導過渡的研製，在26 . 5 39 . 5ghz頻率范圍內，單個微帶波導過渡的插損在0 . 25 1db
  20. The use of aperture coupled feeding widens the working band and increases the isolation. simultaneously, the application of round patch can upgrade the gain and radiation efficiency of the antenna

    採用口徑耦合饋電能夠展寬帶寬，提高隔離度，而採用圓形作為貼片形狀可以提高天線的增益和輻射效率。
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