超射頻 的英文怎麼說
中文拼音 [chāoshèbīn]
超射頻
英文
ultra radio frequency-
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。Analysis of uterine myoma cases treated by radiofrequency ablation guided by b - mode ultrasound
超引導下射頻刀治療子宮肌瘤54例分析Clinical observation and nursing of radio frequency heat cure on myoma of uterus with b - ultrasonographic detection
超監測下射頻熱凝治療子宮肌瘤的臨床觀察與護理Magnetron management of target capacity and stabilization of an anodi current with the help of the built - in electromagnet, an opportunity of a parallel feed several magnetrons from one rectifier, a low level of the shf radiation from a cathodic leg is characterized effective
該磁控管可有效控制輸出功率，內建電磁石使提高了它的陽極穩定性，一個整流器可同時供幾個磁控管，具有低的陰極超高頻輻射。Duo to the intrinsic characteristics of the gaas material, serai - insulating ( si ) gaas photoconductive semiconductor switches ( pcss " s ) have more obvious advantages in the performance of both high power and ultra - fast switching than those pcss " s made of other materials and then can be widely used in ultrahigh speed electronics, field of high power microwave generation and pulse forming ( pulse sources of high power ultra - fast electromagnetism, ultra - wide - band microwave generator )
半絕緣gaas光電導開關（ photoconductivesemiconductorswitches簡稱pcss ' s ）具有兼備寬頻帶和高功率容量特性，使其在超高速電子學和大功率脈沖產生與整形技術領域（大功率亞納秒脈沖源、超寬帶射頻發生器等）具有廣泛應用前景。Magnetron it is characterized by small weight and a low level of the shf radiation from a cathodic leg
其特點在於小的重量和低的陰極超高頻輻射。The world consumption value of lithium tantalate wafers was estimated at us $ 150 million. until last year, 3 - inch wafers dominated the market demand. however, 4 - inch wafers will overtake this year due to change in production requirement for rf saw filters
直到去年底三英寸晶片仍居市場的主流；然而在射頻聲表濾波器製程上的殷切需求下，今年度四英寸晶片的產量成長將會超過三英寸晶片成為主流產品。The main research works of this dissertation are aimed to design of radar waveform and the application of wavelets in ultra - wide radar, including : the design of a new kind of hybrid radar and the research of time side - lobe suppression for pulse compression, the design of receiver r adio front end in data acquisition of ultra - wide band radar, the time delay estimation based on wavelets ( packet ) analysis
本文主要進行雷達波形設計研究以及研究小波理論在超寬帶雷達中的應用，集中體現在以下幾個方面：一類新的組合雷達波形設計及壓縮脈沖時間旁瓣抑制技術研究、超寬帶雷達多通道數據採集方法中前端射頻接收部分的設計及研製、基於小波（包）方法的時延估計方法。Telecommunication cable. foamed polyethylene dielectric superflexible radio frequency coaxial cable for wireless base stations
通信電纜.基站用物理發泡聚乙烯絕緣超柔射頻同軸電纜The is strong and clear, and protect the sight health, see the direct export, and have no the radio frequency net the interference
超強清晰，保護視力健康，音視頻直接輸出，無射頻網狀干擾In the pre - procession of front radio frequency, the super - heterodyne technology which get proper a / d sampling rate through choosing a proper frequency and bandwidth is adopted
射頻前端預處理採用成熟的超外差技術，選擇合適的中頻和帶寬，得到合適的a d采樣速率。This design keep the twice frequency transform and the superheterodyne structure in analog receiver, and use programmable direct digital synthesizer ( dos ) in rf section. use this method, we can not only inherit the advantage of high sensitivity and high selection in traditional design, but also improve the automation of the equipment
該方案保留了原模擬接收機二次變頻的超外差結構，在射頻前端利用了可編程的數字頻率合成器（ dds ） ，這樣既繼承了原接收機的高靈敏度，高選擇性的優點，又提高了它的接收機自動化特性。In this paper, for 2 ~ 2000mhz broadband rf front - end, using subsection processing fixed intermediate frequency superheterodyne architecture, and combining with the actual component ’ s level, a broadband rf front - end system simulation platform is presented, which provided the universal, standardization, and modularization of transmitter and receiver
本文針對頻率范圍2 2000mhz的寬帶射頻前端，採用分段處理的固定中頻超外差結構，並結合目前的器件水平，建立了一個通用化、標準化、模塊化的寬頻帶射頻前端發射機和接收機系統模擬平臺。Performance improvment of rf superconducting cavity
射頻超導腔加速性能的改進And the epc code is saved in the rfid tag
而產品電子碼就存儲在超高頻率的射頻標簽中。Hygienic standard for ultra high frequency radiation in the work environment
作業場所超高頻輻射衛生標準The company s research was handsomely rewarded when the crystal growth team managed to produce its first 4 - inch ingot only one month after the arrival of new crystal puller. this first ingot weighing 6 kg is a 36o y - rotated cut crystal which is the most commonly used in rf saw applications
這支36 ? y軸旋轉切型的晶棒，是現在手機內部射頻聲表濾波器最常用的切型，其重六公斤，四英寸直徑的可用部分超過80毫米長度，可以加工出100片以上的拋光片。Multiple signals caused by reflections might be a liability for uwb wireless units as well, but clever design can permit them to take advantage of the phenomenon
反射所導致的多路徑訊號，對超寬頻無線元件來說也可能成為不利條件，但精巧的設計卻可以善加利用這種現象。And some useful rules are concluded from these experiments. the pd signals on different frequency scopes are surveyed, and the thesis explores anti - noise narrowband detection of partial discharge signals. for the first time the thesis brings forward the choosing - frequency detection of pd ground on the radio frequency communication
同時，進行了局部放電不同頻段信號檢測，為窄帶抗干擾檢測技術奠定基礎，並首次提出基於射頻通訊原理的選頻檢測原理及檢測設想；在實驗室中進行了局部放電超高頻信號的檢測，驗證了超高頻法檢測局放信號時對空間電暈干擾的抑制作用。First, we prepared amorphous bacacuo precursor thin films on single crystal laalo3 ( 001 ) substrate by rf magnetron sputtering. then tl2ba2cacu2o8 hts thin films were obtained by an ex situ post annealing
本文採用射頻磁控濺射法在laalo3 （ 001 ）單晶基片上制備了bacacuo非晶前驅物薄膜，然後將前驅物薄膜進行非原位鉈化處理，制備了tl2ba2cacu2o8高溫超導薄膜。分享友人