頻率源 的英文怎麼說

中文拼音 [bīnlǜyuán]
頻率源 英文
frequency source
  • 頻 : Ⅰ形容詞（次數多） frequent Ⅱ副詞（屢次） frequently; repeatedly Ⅲ名詞1 [物理學] （物體每秒鐘振動...
  • 率 : 率名詞（比值） rate; ratio; proportion
  • 源 : 名詞1. （水流起頭的地方） source （of a river）; fountainhead 2. （來源） source; cause 3. （姓氏） a surname
  • 頻率 : frequency; rate
  1. Whatever it is radar, eccm equipment, communication equipment or instrument, frequency source with high stability is needed to guarantee the quality of carrier signal

    無論是雷達、電子對抗，還是通信、儀器設備等都需要高穩定度的頻率源，以保證載波信號的質量。
  2. The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band. firstly, this paper clarifies the theory of i / q modulation, elaborates evm and acpl, and analyzes the effect of amplitude and phase unbalance and dc offset on evm. secondly we review the basic principle of phase locked loop and it ’ s composing parts, including the basic conception and design method of pll frequency synthesizer, especially introduce the charge pump pll frequency synthesizer in detail

    首先，在闡述i / q正交調制基本原理的基礎上，通過對誤差矢量和鄰近通道功率泄漏的詳細分析，定性、定量地討論了各種非理想電路因素（如相位不平衡、幅度不平衡、直流偏差等）對調制器性能的影響;其次，介紹了鎖相環的工作原理和基本組成部分，包括鎖相環的設計和環路濾波器的設計，特別詳述了電荷泵鎖相頻率源;第三，介紹了採用直接調制技術模擬衛星信號的射頻前端的設計;最後，對整個直接射頻調制系統進行測試，結果基本上達到了課題要求。
  3. According to the target distance ( 5 ~ 50m ), a c - band transceiver for ranging was presented in this thesis. the focus of this work was on designing a c - band frequency - modulated continuous - wave ( fmcw ) frequency source, a receiver and microstrip antenna

    本文針對所探測目標的距離（ 5 ~ 50m ） ，研製了c波段測距收發前端，主要包括c波段調頻連續波（ fmcw ）頻率源，接收電路以及微帶天線。
  4. The concept of " timing " in the article is not the clock in our ordinary living, but syntheses which is made up of some frequency source in the signal generator ( such as cs atom frequency standard, rb clock & high accuracy quartz crystal oscillator ) which produces the primary frequency, the matching input interface and the matching output interface and controlling circuit etc. for example, bits is a kind of timing equipment, which is used to control the timing of some functions

    本文論及的「時鐘」概念不是指日常生活中使用的鐘表，而是由產生基準頻率的信號發生器（如銫原子頻率標準、銣鐘及高精度石英晶體振蕩器等）中的某種頻率源以及相配套的輸入、輸出介面和控制電路等組成的一整套具有特定同步定時功能的綜合體。如bits就是一種時鐘設備，它提供用在通信系統中控制某些功能的定時的時間基準設備，時鐘提供的信號稱為基準信號、定時信號或同步信號。
  5. In this paper, a ku band frequency source based on sampling phase lock loop technique is introduced. the vco of the loop is designed using dielectric resonator. the theory and design method is discussed and emphasized on

    本文介紹了一個應用取樣鑒相和鎖相原理製作的微波ku波段頻率源（頻率合成器） ，其中的壓控振蕩器部分是用介質諧振器（ dr ）設計的。
  6. At last, influences of the frequency, source point depth and conductivity ' s are concisely analyzed on low frequency wave ' s propagation characteristics in the earth ' s crust overburden

    最後根據模型模擬結果數據，從頻率、源點距地面深度和導電率三方面簡略地分析它們對地殼覆蓋層中低頻無線電波傳播特性的影響。
  7. Single frequency source is usually used as local oscillator in communication system and radar system, also as a reference clock in digital circuits, so it is a extensive - applied technique

    固定頻率源可以在在通訊系統和雷達系統中作為本機振蕩器，也可以作為數字電路的基準時鐘信號，因此得到了廣泛的應用。
  8. Dr is made of microwave ceramic with high dielectric constant and very low loss. using dr, the phase noise of an oscillator could be made to be extremely low

    介質諧振器（ dr ）由高介電常數、低損耗的微波陶瓷材料製作而成，它能極其容易地實現微波頻率源的低相位噪聲。
  9. To meet the waveform requirements, dds + multiplier + upconverter was used to realize the c - band fmcw frequency source

    為滿足波形參數要求，本文設計了dds +倍頻+上變頻的c波段三角形調頻連續波頻率源。
  10. With the phase - noise model of the phase loked loop ( pll ) and the analysis of spur characteristic of fractional - n frequency synthesizer using - ? modulating technology, the scheme of pll with mixer + quadrupler is confirmed as a result

    文中，通過建立鎖相環路的相位噪聲模型，並分析了使用- ?調制技術的分數頻率綜合器的雜散性能，以此二者為理論依據完成了毫米波頻率源合成器的基本方案? ?鎖相混頻環+倍頻器方案。
  11. At last, the stability of frequency can be obtained according to the case that the phase between two frequency source varies with time

    最後根據兩頻率源間的相位隨時間的變化情況，換算出被測頻率源的頻率準確度和穩定度情況。
  12. And the new circuit structure for improving the locking range, that is, injection - locked phase - locked loop circuit ( ilpll ) is introduced into the millimeter wave circuit

    在此基礎上，結合注入鎖定和環路鎖相原理，在毫米波頻率源中引入了一種新型的展寬帶寬的電路結構環路注入鎖定鎖相電路（ ilpll ） 。
  13. As for mm - wave radars, they generally require frequency sources of full - coherence 、 high spectrum pureness and frequency - agile ability 。 this task was carried out just aiming at high ? performance mm - wave sources

    本課題即是為研製低相噪、低雜散、窄步進、捷變頻的全相參毫米波頻率源而開展的。
  14. In modern microwave and millimeter wave communication systems, the low phase noise frequency sources have the key effects in the systems ’ performance. especially in the national defence, the effects are more obvious. so in this paper, a method to realize the low phase noise x - band frequency source has been proposed, designed, produced and tested

    在現代微波、毫米波通信系統中，低相噪頻率源對系統性能起著非常關鍵的作用，特別是在軍事國防上，這種關鍵的作用更加明顯，為此在本論文中，就如何實現x波段頻率源的低相噪性能，給出了一種設計方法並對其進行了實現。
  15. The whole system adopts one pll only to control vco to output the ultra wideband frequency of 2 ~ 12ghz, and realizes small volume, low cost microwave frequency source

    整個系統採用單環鎖相控制vco ，輸出2 ~ 12ghz的超寬帶頻率，實現了小體積、低成本的微波頻率源。
  16. Analog temperature compensation crystal oscillator ( atcxo ) is widely used in electronic equipments such as communications, navigation, radar, mobile telephone, program control telephone, measure instruments etc. as their reference frequency source, it is critical part of the above equipments, called as their “ heart ”

    模擬溫度補償晶體振蕩器（ atcxo ）廣泛應用於通信、導航、雷達、移動通信、程式控制電話、測量儀器等電子設備中。作為基準頻率源，它是上述電子設備的關鍵部件，被稱為此類電子設備的「心臟」 。
  17. In the first chapter, the class of modern frequency composing techniques and the recent development situations have been introduced. then the advantages and disadvantages of the techniques have been described. at last, based on the techniques mentioned above, a scheme to realize the x - band low phase noise frequency source has been proposed

    在第一章引言部分，主要介紹了現代頻率合成技術的分類及技術發展近況，並就每一種合成技術的優缺點做了簡要的陳述，最後以上述不同合成技術的優缺點為基本指導思想，提出了一種實現x波段低相噪頻率源的方案。
  18. Run command / frequency source are easy to select with a dip switch

    通過dip開關，能容易的選擇運行命令/頻率源。
  19. Our work have proven the possibility of avalanche high order multiply technology in millimeter wave band, and present valuable research for the novel millimeter wave frequency source technology

    實驗驗證了利用雪崩器件在毫米波頻段實現高次倍頻切實可行，對這種新型毫米波頻率源技術進行了有益的研究和探索。
  20. It is mainly appeared as the electromagnetic wave coupled into less shielded if cable, the if retransmit caused by the coupling between uplink and downlink in an earth station, and the frequency hopping or sweeping interference caused by an unlocked uplink frequency resource

    其表現主要有，因中頻電纜屏蔽不佳而產生的串擾，因地球站上下行通道存在耦合而出現的中頻轉發，以及因上行設備頻率源失鎖而引致的跳頻或掃頻干擾。
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