電波與天線 的英文怎麼說

中文拼音 [diànbōyǔtiānxiàn]
電波與天線 英文
antenna & radiao waves
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 電波 : [電磁] radio wave; electric wave; hertzian wave
  1. A uhf sensor is designed and fabricated, which mostly consists of antenna, uhf amplifier, high pass filter, and broadband wave detector

    通過與大華無線電廠合作，研製了超高頻傳感器，其主要由天線、超高頻放大器、高通濾波器、寬帶檢波器等組成。
  2. In chapter 4, a simulation approach is presented, which combines the outdoor radio propagation model, the eigen - driven patterns of handset diversity antenna with two feed ports and combining schemes of receiving signals, to investigate the performance of a dual antenna handset under co - channel interference ( cci ) and multi - path fading environment

    第四章首先用本徵激勵方向圖的概念來產生手機雙埠分集天線的接收信號矢量，然後將其與城市室外電波傳播模型、分集合併方式相結合，建立了分析在具有共道干擾和多徑衰落環境中手機雙天線系統的性能模型。
  3. On the base of above it, this paper discuss the synthesis of optimum distributed arrays by nonuniform spacing in the sense of dolph - chebyshev. having derived the equations of optimum element distribution, we analyze the exponentially spaced array, which are optimum when the elements are isotropic and equally weighted, and the array by general raised cosine function. the formulate for estimating the sidelobe envelope, beamwidth of the array pattern and clean region width are obtained

    推導了最佳陣元分佈方程，分別對陣元無方向性和等加權時的最佳分散式陣列? ?指數間隔陣列和採用廣義升餘弦加權的最佳分散式陣列進行了分析，推導了天線方向圖旁瓣包絡、波束寬度，干凈掃描區寬度的估計公式，給出了近軸旁瓣電平與陣列參數的關系。
  4. Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results

    文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合
  5. The combination of fdtd method with physical optics is also used to analyze paraboloidal reflector antenna in millimeter band. using fdtd method, we obtains precise near fields of the feed because the computing areas include all the feed structure. the current on the paraboloidal reflector can be calculated by using physical optics, and then the far field of reflector can be calculated

    在毫米波拋物面天線的分析計算中，把fdtd與物理光學法結合起來， fdtd用於具有精細結構的饋源及饋電波導一體計算，得到饋源的幅度和相位方向圖，以此為依據調整饋源結構，使饋源的幅度和相位方向圖為最佳狀態。
  6. On the basis of discussing the analyzed restraint relationship between the link loss and the spot - beam antenna gain a new spot - beam model of optimum design named link level balance spot - beam model is proposed

    在分析鏈路損耗與點波束天線增益之間制約關系的基礎上，提出了一種新的點波束優化設計模型鏈路電平平衡點波束模型。
  7. A patch antenna with air holes in the substrate has been designed. the finite - difference time - domain ( fdtd ) method together with the perfectly matched layer ( pml ) boundary treatment has been used to study the performance of the antenna. it is shown that the surface waves are significiently suppressed, the frequency bandwidth is improved, the sidelobe levels are reduced and consequently the gain in the forward direction is improved by 14 db ( about 4 db higher than the value reported previously )

    設計了一種基底鉆周期圓孔結構的電磁（光子）晶體貼片天線，用fdtd方法並結合pml吸收邊界條件對該天線進行了研究，結果表明本文所設計的基底鉆孔型電磁晶體貼片天線取得了多方面的性能改善，與普通天線相比，基底中的表面波受到很大抑制，天線的帶寬增加，遠場方向圖上天線的旁瓣和背瓣被明顯削弱，向前輻射的增益由原來的12db增加到26db ，增加了14db ，比文獻上報道的gonzalo等人的研究結果提高了4db 。
  8. The performance of the pbg antenna using the new pbg cover together with a pbg substrate is studied by the fdtd method together with the pml boundary treatment. the numerical results show that a more focused beam radiated in the broadside direction is achieved. the gain of the pbg patch antenna in the forward direction is improved by about 6 db. the radiation directivity is improved significantly and reaches 11. 5 db, which is 0. 4 db less than the maximum value that is allowed physically for this size of the antenna ( this difference is about 4. 1 db less than the difference achieved by thevenot et al.,

    用fdtd方法並結合pml吸收邊界條件，我們對加了這種新的覆層結構並且基底鉆孔的復合結構電磁（光子）晶體貼片天線的性能進行了研究，結果證明加了這種新的電磁晶體覆層結構以後，天線的波束收攏很多，並且向前輻射的增益大大提高，與普通天線相比，天線的e面和h面方向圖上向前輻射的增益均提高了約6db ，另外，該復合結構天線的方向性系數達到了11 . 5浙江大學博士學位論文db ，與該物理尺寸天線的方向性系數的理論極限值（ 11 . 9db ）相差0 . 4db ，該差值比thevenot等人設計的電磁晶體覆層天線的相應差值減少了約4 . 1db ，比qiu等人設計的電磁晶體天線的相應差值減少了約1
  9. In this thesis, we introduce the smart antennas and mainly examine the performance enhancements that can be achieved by employing sa in scdma wireless access system. in the part of introduction of smart antennas, we discuss the switched - beam arrays realizing by mending butler network at first. then we compare the different beam forming algorithms in sa

    在對兩大類智能天線系統的介紹中，本文首先討論了一種以改進的butler網路實現波束賦形的多波束切換系統，推導了該天線陣的饋電模型並給出了模擬結果；然後，本文對智能天線波束形成演算法進行了比較，總結了不同演算法的優缺點，並給出具有代表性的演算法描述與模擬。
  10. Based on the viewpoint of interaction between waves in plasmas, the partial differential equation that causes the spectral lines broadening has been deduced from radiation transfer equation of high - frequency electromagnetic waves in plasmas. the numerical solution has been obtained by using the fortran program we compiled. we concretely calculated the spectral lines widths of and fraunhoferx 3704 in corona, fj / a4923. 9 in dwarf nova oy car and f. / a4934 in the variable star rr lyrae

    本文從等離子體波與波相互作用觀點出發，由高頻電磁波輻射轉移方程導出了引起譜線寬度變化的偏微分方程，編寫fortran程序求解偏微分方程的數值解，具體計算了日冕綠線f _ exiv 5303和夫朗禾費線3704 、矮新星oycarf _ eii 4923 . 9 、天琴rr型變星f _ ei 4934的譜線加寬值，對以上各譜線加寬中的等離子體致寬效應作了初步計算。
  11. A microstrip array is designed to meet the needs of the technical specifications. a hybrid method with the full wave, fft and biconjugate gradient ( bcg ) is used to calculate the current distributions on the microstrip. the simulated results show that the method can improve the analysis efficiency and speed up the calculation speed

    研製了符合技術指標的微帶天線陣列，設計中將傳統的全波分析方法與快速付立葉變換（ fft ）和雙共軛梯度（ bcg ）法結合起來，用於分析微帶天線的電流分佈，改進了計算方法，加快了計算速度。
  12. After the discussion of the numerical simulation method based on the fdtd method and the pml technique, the motions of the charges and the electrical field lines were first employed to describe the radiation procedures of the pulse electromagnetic waves. then the causes of how the charges are accelerated and how the motion status of the charges are maintained were further studied from the angle of interaction of charge and field. after these analyses, it was pointed out that the pulse radiation is due to the suddenly occurred time - varying electrical field ( displacement current ) in the open space. this view was further evidenced by two examples : one is the partly resistance loaded antenna, the other is the partly curved antenna. the radiation procedures of the pulse electromagnetic waves of many different situations were simulated throughout this paper with the contours and waveforms of electric field given. these figures are very helpful to the understanding of the radiation mechanism of the pulse electromagnetic waves

    在討論了基於時域有限差分法和完全匹配層技術的數值模擬方法之後，首先從運動電荷和電力線的角度直觀地描述了脈沖電磁波的輻射過程，然後進一步從場與電荷相互作用的角度分析了天線上電荷是如何被加速以及如何維持其運動狀態的，指出了開放空間中突然出現的時變電場（位移電流）是脈沖電磁波輻射的根本原因.文中還對局部電阻加載的天線和局部彎曲的天線進行了研究，以進一步說明上述觀點.對多種情況下的脈沖輻射過程進行了數值模擬，並給出了電場的等高線和空間波形圖，這些圖形對理解脈沖電磁波的輻射機理非常有益
  13. Having perfected the circuits needed to transmit and receive radio waves, tesla tested them using antennas suspended from balloons floating over his downtown laboratory and his uptown manhattan hotel

    在改善傳送與接收無線電波的電路之後，特士拉讓掛著天線的氣球飛過他在市中心的實驗室以及位於曼哈坦北邊的旅館，以進行測試。
  14. A radio antenna converts electric currents and voltages created by a transmitter into electromagnetic waves that radiate into space

    無線電天線會把發射器產生的電流與電壓轉變成電磁波，然後以輻射方式在空中傳播。
  15. Theory analysis and practical measurements of response characteristics are done about two couplers. from the aspect of capacitive coupling, the frequency response characteristics of two sensors are assessed in terms of square wave response. at the same time, the amplitude - frequency relationship characteristics are calculated on the base of antenna model

    對所研製的兩種內置傳感器響應特性進行理論分析與實際測量：從電容耦合原理角度採用方波響應分析傳感器及整個測試系統的頻率響應特性，從天線模型角度分析幅頻響應特性，局部放電實測結果也驗證了設計的傳感器的性能優良。
  16. Key technologies are first introduced here such as the phased array antenna theory, dbf ( digital beam forming ) theory and the configuration of transmit and receive ( t / r ) modules. then part of analog circuitry is optimized with the digital technology. cell circular microstrip disk antenna successfully developed based on the theory of microstrip antenna, the four - celled circular microstrip disk antenna arrays are designed, simulated and analyzed with eda tools - hfss, opt1metrics

    本文以相控陣雷達組成為主軸，逐一對相控陣雷達關鍵技術中的天線陣原理、數字波束形成（ dbf ）技術和收發（ t r ）組件組成進行詳細的分析，利用數字技術對傳統相控陣雷達設計方案中的模擬電路部分進行改進；在理論設計單元圓形微帶貼片天線單元的基礎上，利用微波模擬軟體hfss和optimetrics對四單元的圓形微帶貼片天線陣進行設計與模擬；對相控陣雷達的幅相監測技術進行理論分析和討論，選擇最佳的幅相監測方案。
  17. In recent years, astronomers embark on a systematic search of interstellar radio signals that may originate from extraterrestrial civilizations

    近年來，天文學家亦正手有系統地搜索來自外太空有意義的無線電波，冀能與天外文明接觸。
  18. And the general procedures of these methods are summarized. finally, some practical problems are analyzed using fdtd, which include passive linear resistor element and nonlinear diode element in the microwave circuits and an integrated antenna embedded with an active gunn diode element and a dielectric cavity resonator

    最後，本文通過編程模擬了微波電路中的無源線性器件電阻和非線性器件二極體，含有有源器件gunn二極體的有源集成微帶天線以及介質腔諧振器等具體實例，來驗證各種方法的可行性和有效性，計算結果與實驗結果吻合。
  19. Topics covered include : statistical analysis of signal processing systems, including radiometers, spectrometers, interferometers, and digital correlation systems ; matched filters and ambiguity functions ; communications channel performance ; measurement of random electromagnetic fields, angular filtering properties of antennas, interferometers, and aperture synthesis systems ; and radiative transfer and parameter estimation

    主題包含了信號處理系統的統計分析；輻射儀、光譜儀、干涉儀及數位關聯系統；匹配濾波器、未定值函數；通信通道的效能；隨機電磁場之量測；天線的角度濾波特性；干涉儀與孔徑合成系統；輻射轉換與參數估計。
  20. The method of moments is used to analyze and calculate the broadband characters of impedance, voltage satanding wave ratio ( vswr ), gain and radiation pattern of larger angle lpda, and the relation between these characters and the parameter of antenna construction is discussed in this paper. based on analysis and calculation, the antenna is designed and tested, and the measured results are in good agreement with the theoretical calculation

    本文採用矩量法分析和計算了對數周期天線在張角較大時，它的阻抗、電壓駐波比、增益及方向圖的寬帶特性，討論了這些特性與天線結構參數之間的關系.根據分析和計算，設計並製作天線進行實驗測試，理論計算和測試結果表明，兩者吻合較好
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