輻射天線 的英文怎麼說
中文拼音 [fúshètiānxiàn]
輻射天線
英文
radiating antenna-
It can retain water all the day, close off ultraviolet radiation and atomy in the air, control melanin forming, prevent oxidation and make skin white and soft
能全天候的鎖住水分,使肌膚長時間的保持滋潤,有效隔離紫外線輻射和空氣中的塵埃,防止水分流失和色素沉積,淡化色斑,抗氧化,使皮膚更潤白、光滑。Emphatically, this paper discusses the pattern of signal and antenna radiation of the system, the design principles and technologies of audio - generator and monitor, and the modification of measurement deviation. through special tests and aviate experiments, it has been proved that the performance of the domesticalized system is better than of the initial system
文中重點分析了俄制分米波儀表著陸系統的信號格式和天線輻射場型,著重闡述了系統中音頻信號產生器和監測器的設計原理和實現技術,對信號檢測中的測量誤差進行了分析並設計了有效的修正方法。The works of this paper are mainly about the study for ultra wide - band ( uwb ) signal radiating - designing for effective uwb antenna, and uwb signal scattering - investigating of composite scattering for targets upon ground. firstly, the radiating characters of uwb signal and development of uwb antenna are discussed an uwb planar horn antenna is designed this antenna is characterized with u - balun, simple construction and perfect performance
本文的研究是「九五」國防預研「超寬帶( uwb )雷達體制及關鍵技術研究」項目工作的一部分,主要包括兩方面內容:超寬帶信號的輻射-高效超寬帶天線的研製;超寬帶信號的散射-地表目標的復合散射研究。Another source of natural radiation is cosmic rays from space
另一個天然輻射來源是來自外太空的宇宙射線。To keep the environment people live in, we should restrict or prevent many kinds of pollution, which includes electromagnetic radiation pollution. while we are considering setting up base station or evaluating the electromagnetism pollution of environment, we can measure on the spot. to save time, hard work and cost taken by measuring on spot, it is necessary to calculate and analyze the electromagnetic wave propagation in urban area
在對現有電磁輻射源(如移動通信基站、廣播電視發射天線等)環境電磁污染狀況進行評估時可以進行實地測試,但是對在建或擬建的輻射源則不可能進行先測試,同時為了避免實地測試的費時、費力和較大的測試費用,通過計算機來計算分析城市環境電波傳播顯得很有必要。In radiocommunications, the radiation in a lobe of a directional antenna
在無線通信技術中,定向天線以某一波瓣輻射的電磁能。Since complicated differential and integral operations were involved in the kernel of the integral equation, we simplified the equation and got the nakano equation. as instances, the planar archimedean spiral antenna, the planar equiangular spiral antenna, the monofilar helical antenna, the conical helical antenna with fixed ascending angle and the conical equiangular - spiral antenna were analyzed through the moment method. all of the results matched fairly well with the references and experiment results
這種方法的積分方程的積分核里含有復雜的微積分運算,為了簡化計算,本文在推廣的海倫積分方程的基礎上,對方程進行了簡化,推導了nakano方程,並以平面阿基米德螺旋天線,平面等角螺旋天線,軸向模圓柱螺旋天線,具有固定升角的圓錐螺旋天線和圓錐等角螺旋天線為例,用矩量法求解了天線上的電流分佈,研究了螺旋天線輻射的寬頻帶特性,所得的結果均與參考文獻吻合很好。On the assumption that a cabin and a horn antenna were under the bottom of an airplane, fdtd method was applied to analyze the antenna patterns which are generally affected by the body of the airplane
摘要假定飛機腹部加裝了某一形狀的炮艙和矩形喇叭天線,用時域有限差分法( fdtd )分析了這樣的外形對天線輻射特性的影響。Then, using the opening transmission line model, the deduction of the tem - horn antenna far - field radiation formula is introduced. comparing with the traditional nb antenna array, the brief theory of uwb antenna is analyzed
然後介紹了應用開路傳輸線理論模型對tem喇叭天線軸上遠場輻射的推導過程,並對比傳統窄帶天線陣列,分析了超寬帶天線陣列的一般工作原理。The technical specification of radiation pattern envelope for paraboloid antenna used in microwave relay communication systems
微波接力通信系統拋物面天線輻射圖包絡的技術要求Mutation of maize natural hybrid and germ plasm material selection by ray irradiation
射線輻照天然雜種玉米的誘變作用及其在選育種質材料中的應用The radiation field of audio - frepuency electromagnetic wave and its application
音頻電磁波輻射場及其天線應用Truncation effect of rb mockup on antenna radiation pattern
再入體模型截短對天線輻射特性影響Being the energy transition and eradiating / receiving setting in wireless communications procedure, antenna became one of the most important technologies to be studied
天線作為無線通信中的能量轉換和定向輻射或者接收裝置,成為各國軍事及通信領域研究的重點。Every phased - array rader needs thousands of phase shifters, which control the phase of radiator elements in the antenna aperture surface to scan beams fast
每部相控陣雷達需要上千個移相器,才能控制天線孔徑面上各輻射單元的相位變化進而實現快速掃描。Phase array radar can scan beams fast by controlling the phase of radiator elements in the antenna aperture surface, which shows many excellences such as agility, change celerity and multifunction. therefore, phase array radar is fit for the necessity of combat readiness
這種雷達通過電的方式控制天線孔徑面上各輻射單元的相位變化,以實現波束的快速掃描,使其具有靈活、變化快速、多功能等優點,適應戰備需要。This paper uses an optically modulated scatterer system to measure microwave field with minimal disturbance. this method is especially adapt to measure magnitude and phase of microwave field close to conductor and microwave field with complex path between source and field. so it can be used to measure radiation antenna ’ s near - field and microwave into slots
光調制散射器的測量方法最大限度地減少了測量裝置對被測場的擾動,特別適合於測量導體附近和具有復雜路徑場的幅值和相位分佈,可以用於對輻射天線近場的測試以及孔縫耦合中場的測量,可為天線的設計,微波孔縫耦合效應的研究提供較精確的實驗數據。Crpa - controlled radiation pattern antenna
受控輻射天線Instead, many different prediction tools have been proposed. each of them has advantages and disadvantages and can be applied only to particular circumstances
同時,輻射天線的增多,將導致城市環境電磁污染加重,對人體及對通信環境都有不利影響。Often, mode conversion techniques are used to change the undesirable mode to one that results in a radiation pattern with a boresight peak such as circular te1 1 or rectangular te 01 mode
因此研究軸對稱模式的天線輻射技術具有重要意義。輻射天線的工程設計方案通常有三種:模式轉換器+普通喇叭、 vlasov天線和cobra ( coaxialbeam - roatatingantenna )天線。分享友人