混頻級 的英文怎麼說

中文拼音 [húnbīnjí]
混頻級 英文
mixer stage
  • 混 : 混形容詞1. （渾濁） muddy; turbid2. （糊塗; 不明事理） foolish; stupid
  • 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...
  • 級 : Ⅰ名詞1 （等級） level; rank; grade 2 （年級） any of the yearly divisions of a school course; gra...
  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. In the two - photon resonance case, part of the input pulse energy is transformed into higher and lower frequency components through amplified spontaneous emission and four - wave mixing, and the medium shows strong optical power limiting effect

    在雙光子共振情況下，即入射脈沖頻率等於1 、 3能級之間的共振頻率的一半，由於介質中放大的自發輻射和四波混頻的作用，部分入射脈沖能量轉化為高頻和低頻電場成分的能量，分子介質表現出了很強的光功率限幅特性。
  3. In active section, in order to meet performance of out put power above 10dbm, the power amplifier module of ka - band is fabricated by using hmc283 to achieve the 14db conversion gain. there are five parts that include of waveguide - to - microstrip ? mixer ? filter ? power amplifier and waveguide - to - microstrip. input signal ' s power is 10dbm, after it pass waveguide - to - microstrip, it ' s frequency is escalate from 30ghz to 35ghz

    該組件由五個部分組成：功率為10dbm信號經過波導? ?微帶過渡，然後混頻，濾波將30ghz提高到35ghz濾除不需要的諧波鏡頻以及三階交調信號，為了彌補混頻濾波的變頻損耗，加一級功率放大器，此放大器採用hittle公司hmc283晶元，此上變頻放大組件完成了上變頻?濾波?放大功能。
  4. It is found that the fwm field can cause the asymmetry of electromagnetically induce transparency profile. in addition, the effect of different propagating orientations of probe field on the electromagnetically induced transparency is also discussed. in the molecular multi - level system with the perturbed superposition levels, we discuss the electromagnetically induced transparency, spontaneous emission enhancement, double dark resonance and double electromagnetically induced transparency by using the density matrix equation under weisskopf - winger approximation and dressed - state density matrix equation

    針對實際的實驗條件，考慮了一種影響量子干涉的新的因素-四波混頻場，研究了四波混頻場對雙光子探測的-型能級體系的eit的影響，發現四波混頻場能夠導致雙光子探測的eit線型的不對稱，在此基礎上，討論了不同探測場的傳播方式對eit的影響，針對分子中實際存在的包含有微擾能級的不同多能級系統，我們分別採用綴飾態繪景下的密度矩陣方程和weisskopf - wigner近似下的密度矩陣方程詳細地討論了電磁感應透明、自發輻射的干涉相消和相長、雙暗態共振和雙電磁感應透明現象。
  5. Lastly, the paper designs an example and tests its amplitude frequency response. at last, this paper points out that this method can efficiently control the performance of narrow band fir digital filters. both test and application indicate that practical performance and ideal performance are almost identical

    在此基礎上給出窄帶fir濾波器的詳細結構，分析了窄帶fir濾波器的多級實現原理，並且對窄帶fir濾波器的的基本特性進行了分析，這些特性包括：頻率特性、抗混疊特性、去鏡象特性。
  6. The real runoff time series was divided into the high frequency item and the low frequency item with the help of the wavelet analysis first, then the two items were modeled by chaos theory and the stepwise regression algorithm, at last the output of the two models were added together.

    論文首先藉助小波分析，將實測徑流時間序列分解為高頻項和低頻項兩項，其次對這兩項分別用混沌理論和逐步回歸理論建模，其中混沌預報藉助基於自組織法求解的的volterra級數來完成，然後將兩者結果疊加起來。
  7. The concept of viffoal laser frequency stabilizaion is put fowi. the frequency stabilizaion at the center of doppler curve has been realized aller signal detecting, phase sensitive detecting, integrating and high voltage amplifying circuits with fm spectroscopy a frequency stability of l0 -, has been obtained with a reproducibility of l0 - 9. hyperfine spectra of, ', i, near 532nm have been studied via modul8tion tfansfer spectroscopy

    利用fm光譜法將激光單次通過碘吸收室進行線性吸收，再經信號檢測、混頻、積分和高壓放大等伺服電路，實現了在多普勒曲線中心處的頻率穩定，頻率穩定度和復現性可達10 ~ （ - 9 ）量級。
  8. The following important work has been done : ( 1 ) some special problems of rate - bias laser gyro were analysed. the problems include modulation and demodulation of the output and algorithm of the attitude updates ; ( 2 ) the integrated navigation system with the fault tolerance property which equipped with many navigation equipments as sins, gps, dvs, ads, mg, vg is designed, and compared with that of ckf via simulations ; ( 3 ) the theories and methods of system level fault detection apply to federated filtering is investigated ; ( 4 ) the problem about using the fused information of sins based on rate - bias laser gyroscope / dynamical tune gyroscope to realize the component level hard fault interactions detection through a back - propagation neural network is discussed

    主要研究工作有：研究了速率偏頻激光捷聯慣導的陀螺測量信號的解調演算法；設計了在速率偏頻激光捷聯慣導、 gps 、多普勒雷達、大氣數據系統、磁航向儀及垂直陀螺配備條件下聯邦濾波組合導航系統，對聯邦濾波器和集中濾波器的性能做了模擬對比分析；研究了適用於聯邦濾波器的系統級故障理論和方法；探討了利用速率偏頻激光捷聯慣導撓性捷聯慣導陀螺的混合測量信息，通過神經網路實現硬故障交互檢測的方法。
  9. Moreover, multiple frequency stimulation method can increase consumption of ic obviously and surface diffuse reflection method can improve surface emission coefficient of ic availably

    混和信號激勵法能明顯增大三極體放大電路耗散功率，特別是第一級耗散功率；增頻激勵法能有效提高ic耗散功率；表面漫射法能有效增大元器件的發射系數。
  10. In the design of w band double - balanced mixer, a novel structure using magic - t and two baluns, which all realized by ratrace, is proposed with no crossing of transmission line. rf and lo signals are transmitted to the circuit by waveguide - to - microstrip probe transitions

    在w頻段雙平衡混頻器的設計中，本文提出由混合環構成的魔t與巴倫級連而成的功率混合電路，這種新穎的電路結構使整個電路單平面化，避免了任何跳線。
  11. According to the following design theory : the dsp calculates in real time and produces three phases spwm waves to control the on or off of the 6 igbts in ipm respectively. ipm then inverts the commutated single phase direct current ( insulated gate bipolar transistor ) into three phases alternating current. when modulated signals of spwm are changed, the on - off time of switches also changes, so as to the voltage and frequency of output signals

    本文提出了一種基於dsp （數字信號處理器tms320f240 ）的通用的三相間接變頻電源系統，利用分段同步調製法和混合查表法，實時計算不同頻率下的采樣周期、電壓幅值、輸出脈寬，產生雙極性spwm波形，經驅動放大後用于ipm （ intelligentpowermodule ）中的絕緣柵雙極型晶體管柵級驅動，以控制電源的輸出電壓和頻率，實現變頻電源的智能數字控制。
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