諧振天線 的英文怎麼說
中文拼音 [xiézhèntiānxiàn]
諧振天線
英文
resonant antenna-
In addition, this paper numerically investigated the influence of the lumped parameters of the gunn diode on the frequency of the oscillation, and the tuning techniques of the oscillation frequency of the active antenna
本文還利用fdtd法數值研究了gunn二極體的集總參數對振蕩頻率的影響以及有源天線振蕩頻率的調諧技術。We acquired the system ' s dynamic response when the satellite attitude was adjusted and the mode of the antenna. then modal analysis and dynamic analysis have been done to the satellite - antenna system by using the finite element analysis ( fea ) software of ansys. through the analysis we got the system ' s connatural characteristic, the amplitude - frequency characteristic of harmonic response, the power spectrum density of random vibration response, the maximal amplitude and resuming time of impact response
其次藉助ansys有限元分析軟體，對系統進行了模態分析和動力學響應分析，獲得了不同天線結構參數下的衛星?天線系統的固有特性，簡諧響應的幅頻特性，隨機振動響應的功率譜密度，以及沖擊響應的最大幅值和恢復時間等。Resonant characteristics of a trapezoid meander line monopole antenna
梯形彎折線單極子天線的諧振特性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A new waveguide made of changing a wide wall of a rectangular waveguide to a uniform curved wall is called conformal waveguide. a kind of expression of approximate solution for domain mode of the new waveguide, including symmetric, unsymmetric arc, parabolic arch, hyperbolic arch, elliptic arch, etc., is constructed by using boundary condition of mental waveguide, variational method and boundary element method. by using the equivalence principle, an approximate calculating formula for equivalent resonant conductance of a narrow longitudinal halfwavelength slot cut in the curved wall of the unsymmetric arcrectangular waveguide is derived, and the result is shown. although this solution is approximate, it can solve the problem in designing the slotted antenna of such conformal waveguide
把矩形波導一個寬面外突成均勻曲面構成的新波導統稱為共形波導.利用金屬波導邊界條件、變分法、邊界元素法構造這種新波導中主模場的一種近似解表達式，包括曲面橫截線為對稱、非對稱圓弧，拋物線弧，雙曲線弧，橢圓弧等.然後根據等效原理，推導非對稱圓弧矩形波導曲面上窄的縱向半波長縫隙的等效諧振電導的近似計算公式，給出計算曲線.這種解雖然是近似的，但卻能解決這類共形波導縫隙天線的工程設計But, the measured - data is a very great quantity and every data contain all data of 1 - 25 harmonic, measured time can have hours to days. the count by hand is very heavy and over - elaborate, sometimes the statistics results is error. it won " t reach the analysis purpose and don " t obtain the curve of harmonic oscillation characteristic in a row frequency range
可是，測試數據經常是大量的，每一組數據又包含從基波到25次諧波的所有數據，測試時間可能是幾個小時，有的甚至是幾天時間，這樣的工作量由人工完成是非常繁重的，又是非常繁瑣的，有時還統計不出正確的數值，起不到應有的測試分析目的，更無法獲得連續頻域內的諧波諧振特性曲線。Thin films of ferroelectric materials can be developed to present very few losses and add no significant weight to the antenna structure. the permittivity of these materials changes with an applied dc voltage ; and this change can be used to control the resonant frequency of an antenna
將鐵電材料應用到天線的設計中，外加直流偏壓可以控制鐵電材料的介電常數，從而控制天線的諧振頻率，這樣就可以製作出可調諧天線。Firstly, the oscillator theory was researched as the base of the design of oscillator - type aia in this paper. the derivation of oscillation condition and stability condition were given ; at the same time, the cavity modeling theory of microstrip antenna was studied, which gave the relation between the size of microstrip antenna and the resonate frequency and that between the size and impedance of microstrip antenna
首先，針對本文所討論的振蕩型有源集成天線，作為理論基礎，進行了振蕩器理論的研究，推導出有源集成天線的振蕩條件和穩定條件；同時利用空腔模理論，給出了天線尺寸與諧振頻率和輸入阻抗的關系。To study the resonant characteristics of eccentric circular and concentric circular - elliptical ring microstrip antennas, the method, which is connected with the concentric ring microstrip antenna and based on the perturbation, is employed to calculate resonant wave numbers. comparisons of calculations with reference for the fundamental mode are also presented, agreement is very good for small eccentricity
為研究偏心圓環及同心圓-橢圓環微帶天線的諧振特性，運用了一種以對同心圓環微擾為基礎的計算方法，計算的諧振波數值與參考文獻作了比較，在小偏心率的情況下，一致性很好。This thesis presents the theoretical analysis about the design of the tunable antennas with multilayered structure theory and microstrip antenna ' s analytical methods. and it improves three typical kinds of antennas, and uses the voltage controlled ferroelectric materials. we analyze the tuning features of the antenna by simulation under the condition of different permittivity of the ferroelectric materials, and discuss the feasibility of improvement from microstrip antenna to tunable antenna
本文結合多層介質理論及微帶天線的分析方法對可調諧天線進行理論分析，並對矩形貼片天線、圓形貼片天線、微帶振子天線三種典型的微帶天線結構進行改進，引入壓控鐵電薄膜材料，模擬分析在改變鐵電薄膜介電常數條件下天線的調諧特性，討論微帶天線改進為可調諧天線的可行性。This kind of reflectors possessed the advantages of the traditional reflectors and the phased arrays. the reflectarray is made up of lots of resonant elements. when the feed radiate the reflectarray, the reflected wave could be focused at some desired direction owing to the adjustment of each element
這種陣列反射天線具有反射天線和陣列天線共同的優勢，它的基本結構就是由大量的無源諧振單元組成的單屏或多屏周期性陣列，然後由一個饋源照射這個天線，通過調節介質板上每個單元對于入射波的散射相位，使得反射波在特定的方向實現同相位，發射出方向性極強的筆形波束。This paper will first discuss bandwidth enhancement in general, and then research the multiple resonance method to enhance the bandwidth
在討論微帶天線頻帶展寬的基礎上，研究多諧振方式展寬頻帶的方法。Resonant frequency and dual - frequency design of bow - tie microstrip antenna
蝶形微帶天線的諧振頻率與雙頻設計In order to overcome the shortcomings of the monopole antennas, a methods of quasi - fractal is used, which decrease the resonant frequency
為此，對hf頻段的單極子天線進行準分形，有效地降低了天線的諧振頻率。The directivity coefficient of the phased array antenna has been generalized and discussed. according to the formulations of microstrip antenna design theory, planar and cylindrical microstrip patch cell has been analyzed. we can conclude that the cylindrical microstrip patch cell has the performance of high gain, low thickness, high resonant frequency, uniform directivity diagram, and easy fabrication on missile body, so it is a good choice
本文根據微帶天線設計理論，分析了平面和柱面兩種微帶貼片單元，其中柱面微帶貼片單元增益高、厚度小、諧振頻率高、方向圖均勻，且較易加工製作在彈體上，適合在相控陣天線中做共形輻射單元。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。Due to excellent stop band and slow wave characteristics, they are applied to filters, resonators, directional couplers, diplexers and antennas
由於其優良的帶阻、慢波等特性，它們被廣泛地應用於濾波器、諧振器、定向耦合器、雙工器和天線中。In this paper, resonant characteristics of the meander - line dipole antenna depended on times of meanders, the height of meanders and the angle of meanders are analyzed
摘要本文研究了由矩形彎折線構成的偶極子天線的諧振特性，分析了彎折線偶極子天線的彎折次數、矩形彎折的高度以及彎折角度等參數對天線諧振特性的影響。Antenna parameters studies are presented and practical design considerations for achieving high gain and wide bandwidth are given. in chapter 4, a novel pifa with high radiation efficiency is designed for a tri - band mobile handset application
天線印刷線路板的尺寸等參數對天線諧振頻率和帶寬的影響在本章中詳細研究，一個詳細的實際設計例子也在本章中介紹，測試結果表明天線獲得了較高的增益和較寬的帶寬。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。分享友人