dielectric antenna 中文意思是什麼

dielectric antenna 解釋
電介質天線
  • dielectric : adj. 非傳導性的，絕緣的，介電的。n. 電介質，電介體，絕緣體。
  • antenna : n. （pl. -nae , antennas）1. 【動物；動物學】觸角。2. 【無線電】天線〈英國常用 aerial〉。
  1. A model of the capsulated antenna is presented and simulations are conducted according to different numerical values of parameters involving capsulation dimensions and dielectric constant

    建立了帶有圓柱形介質封裝的天線模型，針對介質厚度、內徑和介電常數三個封裝參數的不同取值組合進行了大量模擬。
  2. In addition, ba6 - 3xnd8 + 2xti18o54 ( bnt ) ceramics is another important microwave dielectric material due to its applications in antenna duplexor, but the characteristics of bnt thin films have rarely been reported

    同時，我們採用激光脈沖沉積法制備了ba6 - 3xnd8 + 2xti18o54 （ bnt ）薄膜。 bnt是另一類被廣泛研究的微波介質材料。
  3. The novel three - dimensional finite - difference approximations of mur ' s absorbing boundary conditions are also presented in frequency - domain. then the ddm based on fdfd is investigated in the applications of three - dimensional electromagnetics problems. and it is used to analyze the leaky wave antenna based on image nonradiative dielectric ( nrd ) guide

    最後，闡述了maxwell方程組和劃分區域的despres傳輸條件的頻域差分格式建立，在截斷邊界上構造了三維頻域mur條件的差分近似，探討了基於頻域有限差分的區域分解法在三維電磁問題中的應用實現，並將該演算法用於分析一種基於nrd波導結構的漏波天線。
  4. This paper discusses three slot - coupled microstrip antennas with high dielectric constants based on gps ( global positioning system ) receiving antenna. they are separately with slots of oblique, t shape, and l shape

    本文以全球定位系統（ globalpositioningsystem ，簡稱gps ）接收機微帶天線單元為研究對象，探討了三種高介電常數縫隙加載正方形貼片的天線特性，分別是斜縫， t形縫和l形縫。
  5. In this dissertation, the performance of linearly tapered fin - fed slot antenna ( lwsa ) is discussed in theory, simulation and experiment. the radiation pattern characteristic influenced by changes of antenna ’ s dielectric material, tapered shape and dimension is studied detailedly. though the tapered slot antenna design is very important, a good waveguide - to - finline taper transitions is also needed because they could not thought over separately

    本文主要採用理論分析、數值模擬和實驗等手段對線性漸變槽天線的特性進行了研究，分析了介質材料、天線漸變段以及天線尺寸對天線方向圖的影響，分別設計了天線罩、線性漸變槽天線以及天線的饋電結構。
  6. Usually the frequency bandwidth of microstrip patch antenna is relatively narrow. however, it can be effectively broadened with the employment of the micro - electro - mechanism systems technique to fabricate microstrip antenna with multilayer dielectric substrates and patch

    通常微帶貼片天線的頻帶較窄，而利用微電子機械繫統（ mems ）技術製作具有多層介質和貼片結構的微帶天線，可以有效地擴展天線的帶寬。
  7. The conformal microstrip antenna with some unique character has been applied in many fields, especialy on speedy objects. in this paper, an efficient fdtd algorithm is introduced to analyse the microstrip antenna. firstly, the fdtd formula in descartes coordinate system and in cylindrical coordinate system are obtained from the time _ dependent maxwell equations using the yee algorithm in a calculating region where the dielectric parameters are independent of time and space. the choice of the space discretization units and the time discretization interval are discussed which are decided by the accuracy and stability respectively. the shape and setup of the excitation source are discussed too. the excitation source is chosen to be gaussian pulse in shape. secondly, the mur ' s first - order and second - order boundary condition are deduced in cylindrical coordinate system. the methods of transforming radiation fields from near zone to far zone in the frequency domain and in the time domain are presented when fdtd is applied to analyse the characteristics of far zone. finally, three kinds of microstrip antennas are analysed. they are a slot antenna that lies on a plane ground of a microstrip, a slot antenna that lies on a cylindrical ground of a microstrip and a microstrip line _ fed aperture coupled stacked rectangular patch antenna in cylindrical coordinate system

    本文從麥克斯韋旋度方程出發，建立了笛卡兒坐標下無源空間中均勻無耗媒質的fdtd基本方程和圓柱坐標下無源空間中均勻無耗媒質的fdtd基本方程，詳細討論了fdtd法計算中時間步長和空間步長的選取原則以及激勵源的類型和設置；推導了mur一階和二階邊界條件在圓柱坐標下的差分格式；給出了在用fdtd法計算天線的遠場輻射特性時必需採用的頻域和時域近場遠場變換技術；最後用fdtd法計算了平面微帶縫隙天線、柱面共形微帶縫隙天線和柱面共形微帶層疊天線的輸入阻抗和遠區輻射場，並分析了天線的一些參數的變化對天線輸入阻抗的影響，得出了一些有用的結論。
  8. The way of widening the band is realized by employing the inverted parasitic patch and the thick and low dielectric constant substance. with this treatment, the relative band of the antenna can be widened up to 20 %. and by adopting the way of two h - slots arranged in a “ t ” configuration, the isolation is improved

    微帶天線的頻帶展寬通過採用倒懸寄生貼片和較厚的低介電常數的介質來實現，經過這樣處理后的天線帶寬可以達到20 %以上;而隔離度的改善則是採用了兩個h形縫隙排列成「 t 」型結構。
  9. 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。
  10. With the development and application of the microwave communication system 、 precision guided technologies and electronic countermeasure etc, the research on dielectric materials such as circuit dielectric substrate 、 antenna unit dielectric substrate and radome are paid more and more attention

    隨著毫米波通信系統、精確制導、電子對抗等技術的發展和應用，對電路介質基片、天線單元介質襯底、天線罩等介質材料的研究越來越受到重視。
  11. For the case of microstrip patch antenna structure with dielectric, the fdtd based commercial software empire is used. a coaxial probe - fed microstrip patch antenna and a coaxial probe - fed stack patch antenna have been analyzed for checking its validity. on the base of that, the multi - band property of microstrip fractal patch antenna is carefully studied, and the effect of antenna ' s property by the permittivity, the size of patch, the order of the fractal and the metal box is depicted

    在此基礎上，著重分析了同軸饋電的sierpinski地毯形微帶貼片天線以及同軸饋電耦合的sierpinski地毯形微帶貼片天線的多頻特性，給出了介質參數、貼片尺寸、分形天線的階數以及金屬盒對同軸饋電的sierpinski地毯形微帶貼片天線特性的影響。
  12. A top loaded antenna is provided that is composed of a triangular - shaped resonator and a dielectric substrate

    一種頂端負載之類梯形平面天線，其中，頂端負載之類梯形平面天線形成在一基板表面，並藕接至一射頻電路。
  13. The ferroelectric materials for their excellent dielectric, piezoelectric, ferroelectric, pyroelectric, electro - opticial, phonon - optic and nonlinear polarization properties have been widely applied in many fields especially in microwave tunable devices, such as phase shifter in phased array antenna, resonantor and filter etc. as far as microwave tunable dielectric materials, barium strontium titanate ( bst ) and its doped series have been investigated intensively, which have about 50 % tunability

    鐵電材料具有優良的介電、壓電、鐵電、熱釋電、電光、聲光及非線性極化等特性，在多種領域有著廣泛的用途。利用其非線性極化特性能制備微波可調元器件，如相控陣天線上的移相器，諧振器，濾波器等。
  14. Broadside dielectric antenna

    垂射介質天線
  15. Our product offering dielectric products includes dielectric filters, dielectric duplexers, dielectric antenna, dielectric resonator

    介質產品包括介質濾波器，介質雙工器，介質天線，介質諧振器。
  16. 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。
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