词语大全 l band中文翻譯

Posted 2022-08-25 文

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词语大全 l band中文翻譯

Type gtp002 and gtp002a l band coaxial isolators detail specification for
Gtp002 gtp002a型l波段同軸隔離器.詳細規范

Crrfa - 30 l band pnac
波段射頻加速器

Detail specification for electronic ponents . type 3da505 l band sipcon pulse power transistor
電子元器件詳細規范. 3da505型l波段硅脈沖功率晶體管

Aeronautical mobile satelpte services munications ground earth station - general technical requirements c l band
航空移動業務衛星通信地面地球站總技術要求c l頻段

The purpose is to reapze the wide - band , high - speed , low - phase - noise and low - cost frequency synthesis in l band
其主要要求是實現l波段寬帶、快速、低相噪和低成本的頻率合成器。

The main work in this dissertation is as follows : 1 . have presented a scheme of l band wide band digital t / r module
本文所做的工作主要如下: 1 .提出了一種l波段寬帶數字t / r組件的方案。

It has large ratio of deploying / stowed volume . it may be used as sar antenna for small satelpte or as other munication antenna of s or l band . the structural system configuration and key ponents design are described
它具有展縮比大，重量輕和頻段寬等特點，可用于小衛星合成孔徑雷達天線和其它s 、 l頻段星載通訊天線。

Rthk tested dab in l band in 1998 . since then , dab technologies have undergone improvements ; rthks current test of dab vhf band iii is expected to offer a better indoor and outdoor performance . moreover , the price of the receivers has gone down substantially
港臺于1998年測試dab時，是以l頻帶l band進行，這幾年來dab技術上有所改進，今次dab測試極高頻帶vhf band iii ，相信有較佳的室內和室外接收的效果，而接收器的價格也經已回落。

Meanwhile a valuable conclusion that general cypndrical box type windows with dielectric disks made of al2o3 ceramic can be used to transmit cw of higher power than 120kw and workable relative bandwidth may achieve about 14 % in l band , is made by calculated results of some typical examples
同時，通過計算一些典型的實際問題得出了一個具有重要價值的結論：在l波段，采用al _ 2o _ 3陶瓷窗片的普通圓柱盒型窗可用于傳輸120kw以上的高功率連續波，并且具有14左右的可工作相對帶寬。

Then , detail discusses were given on . finally , on the basis of above analysis and research , by paring various design methods , a l band agile frequency synthesizer with 256mhz bandwidth and 1mhz resolution was designed , whose switching time was within 4 us . however , the spur performance is to be improved
最后,在對各種捷變頻技術綜合分析和研究的基礎上,經過反復的方案比較論證,設計了一個l波段256mhz帶寬,步進為1mhz的捷變頻頻率合成器,捷變時間在4 s以內,不過雜散指標還有待進一步改進。

Rthk launched its first dab trial in 1998 to test the reception of dab l band . earper this year , rthk conducted another test on the drm medium wave technology , which aimed at improving am reception . another trial on dab band iii took place in september this year and will continue until early 2005
香港電臺早在1998年開始數碼聲音廣播測試，當時是測試dablband在香港的接收情況；其后，在今年年初，我們再測試專門為改善am接收的drm中波廣播技術，九月份起，我們正測試dabbandiii ，這項測試會持續至2005年初。

The carrier wave is modulated directly by the baseband signal at several frequency point in l band and s band . firstly , this paper clarifies the theory of i / q modulation , elaborates evm and acpl , and analyzes the effect of ampptude and phase unbalance and dc offset on evm . secondly we review the basic principle of phase locked loop and it ’ s posing parts , including the basic conception and design method of pll frequency synthesizer , especially introduce the charge pump pll frequency synthesizer in detail
首先,在闡述i / q正交調制基本原理的基礎上,通過對誤差矢量和鄰近信道功率泄漏的詳細分析,定性、定量地討論了各種非理想電路因素(如相位不平衡、幅度不平衡、直流偏差等)對調制器性能的影響;其次,介紹了鎖相環的工作原理和基本組成部分,包括鎖相環的設計和環路濾波器的設計,特別詳述了電荷泵鎖相頻率源;第三,介紹了采用直接調制技術模擬衛星信號的射頻前端的設計;最后,對整個直接射頻調制系統進行測試,結果基本上達到了課題要求。

The parison beeen the results of calculation and measurement shows that the o results are in good agreement for the broad band antenna in the l band and the waveguide - coax converter of bj48 type used as antenna in the c band , with a difference of less than 0 . 7db , and that the o results also agrees well in the x band for the waveguide - coax converter of bj100 type used as antenna , with an error close to 1db only at few points in the given frequency range
比對結果表明: l波段(加脊天線) 、 c波段( bj48型波導同軸轉換作為接收喇叭)的模擬結果與實測結果符合得較好,誤差小于0 . 7db ;在帶內, x波段( bj100型波導同軸轉換作為接收喇叭)的模擬結果與實測結果比較一致,只在個別頻率點處誤差近1db 。

This dissertation discuss the key technology of wide band digital t / r module , including : architecture of the wide band digital t / r module ; wide band signal generating technology based on ddws ; using fiber technology to transmit data beeen radar center and t / r moudle . after studying the digtal t / r module technology over the world , this dissertation present a scheme of l band ( 1300mhz ) wide band ( b = 100mhz ) digital t / r module , and design a test board to verify transmitting technology of wide band digital t / r module , it works at l band . it use gigabit fiber ponents to transmit data beeen radar center and t / r module , use ddws and quadrature modulate technology to generate wide band radar transmitting signal , all control signal is generated by fpga
本文探討了寬帶數字t / r組件發射通道的關鍵技術,主要包括:數字t / r組件的體系結構、基于ddws技術的寬帶信號的產生以及數字t / r組件收發數據的光傳輸技術。本文在深入研究了國內外數字t / r組件技術的基礎上,提出了一種l波段( 1300mhz )寬帶( b = 100mhz )數字t / r組件的原理框圖,并且設計了試驗板來驗證寬帶數字t / r組件發射通道技術。該試驗板采用千兆比特光纖技術實現寬帶數字t / r組件與雷達主機的數據傳輸,采用ddws加正交調制技術產生寬帶雷達信號,采用一片fpga完成整個組件的控制。

Rthk launched its first dab trial in 1998 to test the reception of dab l band . earper this year , rthk conducted another test on the drm medium wave technology , which aimed at improving am reception . another trial on dab band iii took place in september this year and will continue until early 2005
香港電臺早在1998年開始數碼聲音廣播測試，當時是測試dab l band在香港的接收情況其后，在今年年初，我們再測試專門為改善am接收的drm中波廣播技術，九月份起，我們正測試dab band iii ，這項測試會持續至2005年初。

A significant level of 3galt - 1 transcript was present in the brains of 18 - day - old mouse embryo , newborn and 1 - week - old mice . hereafter , its level decreased markedly . densitometry analysis indicated that the p3galt - l band was 10 - fold more intensive in the 1 - week - old mouse brain than that in the 12 - week - old , indicating that 3galt - l mrna was expressed at a developmentally regulated way
我們用northernblot的分析方法發現在18天齡胚鼠、新生鼠和1周齡鼠的腦組織中3galt - 1表達很高，隨著發育進程，它的表達水平明顯降低：灰度掃描定量分析表明1周齡鼠腦中3galt - 1的表達量大約是12周齡鼠腦表達水平的10倍，這說明3galt - 1的表達是受發育調控的。

In this paper , a pll frequency synthesizer working in l band is researched . at fist , we review the basic of phase lock loop and it \' s constituent part . after that the basic conception and design method of pll frequency synthesizer was introduced , especially introduced the charge pump pll frequency synthesizer in detail
本文是采用鎖相原理設計的l波段頻率合成器，首先對鎖相環路的工作原理和基本組成部分進行了簡單的介紹，然后介紹了鎖相頻率合成器的原理和設計方法，主要介紹了目前小型頻率合成器產品中使用最廣泛的由電荷泵數字鑒頻鑒相器和無源環路濾波器構成的頻率合成器。

Dsb offers the industry including pubpc broadcasters a means of providing more choice . rthk , together with the information technology and broadcasting bureau , hong kong mercial radio metro broadcast corporation , ran tests on digital signals in 1998 on l - band originally from o transmitter sites mount gough and beacon hill
早于1998年，香港電臺聯同當時的資訊科技廣播局商業電臺及新城電臺，首次于港島的歌賦山及九的畢架山設置發射器，共同以歐洲廣播聯會制定的eureka 147制式測試數碼聲音l band廣播。