band frequency 中文意思是什麼
band frequency
解釋
帶頻-
Compared with traditional mechanical and optic gyros, hrg has such advantages as no high speed circumvolving or moving parts in structure, no warm - up time and short start - up time, wide signal band in frequency, low excursion noises, great endurance in over loading, nuclear radiation and short time power off, small bulk, light weight, low power cost and long life, which is suitable for space applications
與傳統的機械陀螺和光學陀螺相比，半球諧振陀螺具有如下優勢:結構上無高速轉子、無活動部件;不需預熱，啟動時間短;信號頻帶寬，漂移噪聲低;能承受大的機動過載;抗核輻射，並可經受短時間電源中斷的影響;體積小，重量輕，功耗低，壽命長，非常適合空間應用。 -
On data level, it is firstly explored fusing signature data from sparse - band collocated radars to obtain wider band target frequency response. the most difficult problem which restricts the fusion process is the lack of mutual coherence between the various radar subbands
在數據層，首先探索了對多個配置在同一地方的不同頻帶雷達測得的目標頻率響應進行融合，以獲取更寬頻帶目標頻率響應的方法。 -
The signal we named it fundamental wave ; according to the fundamental wave, coefficients of the fundamental wave can be lined in a sequence. when the unique of the dissolve of the fundamental wave can be confirmed, the sequence of the coefficients can be regarded as one of representation forms of the signal itself ; theory of dissolvable signal shows that when order of the matrix of fundamental wave sampling equals to number of fundamental waves, the sequence of the sampling values from sampling points must be matched one by one with the sequence of the coefficients of fundamental waves. the sampling composed by sequences of the sampling values must be full sampling ; the relevant deductions of the theory of dissolvable signal shows that when sampling the signal, sampling frequency must be lager than the ratio of the number of fundamental waves to the occupation time of the fundamental waves ; to band - limited signals, when the fundamental wave is a sine signal, the results from the relevant deductions of theory of dissolvable signal is coherent to the classic sampling theory
本文通過分析認為，當信號集中的任一信號可表示為一系列已知信號的線性代數和時，信號集便構成可分解信號集，已知信號稱為基波信號；對可分解信號而言，基波系數構成一序列，當對指定的基波信號集分解唯一確定時，系數序列本身便是信號的一個表示；可分解信號采樣定理指出當基波樣值矩陣的秩等於基波數時，則由采樣點處的采樣樣構成的樣值序列必與基波系數序列一一對應，從而由該樣值序列構成的采樣必為完全采樣；可分解信號采樣定理中的推論指出，對信號集進行采樣，采樣頻率必須大於其信號分解的基波數與其對應時長之比；對有限帶寬信號，若基波信號為正弦信號時，由可分解信號采樣定理推論給出的結論與經典采樣定理一致。 -
Design and implementation of a c - band frequency synthesizer
頻段頻率合成器的設計與實現 -
The channelized digital receiver based on srd is the electronic equipment, which can be used in communication and military affairs, because of its excellence on wide band frequency coverage, digital processing, software programming, high dynamic range, receiving signal with all probability, simultaneous signal detection and so on
基於軟體無線電思想的通道化數字接收機是一種即可用在通信領域也可用在軍事領域的電子設備，具有大帶寬、數字化、軟體化、大動態范圍、全概率接收、多信號同時處理等優點。 -
Moreover, the higher harmonic order is, the lower distinguishability, and, as a result, the assessment accuracy becomes bad. considered its prominent localization both in time - domain and in frequency - domain, wavelet is used to the field of assessing harmonic impedance for the first time. we choose chaari wavelet because of its special band frequency characteristic, which can stratify signals synchronously and locate the distortion time precisely in assessing harmonic impedance
選取chaari小波為母小波，利用其特殊的帶通特性，對在公共連接點（ pcc ）采樣得到的電壓，電流畸變波形進行同步分層， 「突出」信號的畸變部分，提高了被分析信號的「信噪比」 ，以利於諧波阻抗估計準確度的提高。 -
According to the target distance ( 5 ~ 50m ), a c - band transceiver for ranging was presented in this thesis. the focus of this work was on designing a c - band frequency - modulated continuous - wave ( fmcw ) frequency source, a receiver and microstrip antenna
本文針對所探測目標的距離（ 5 ~ 50m ） ，研製了c波段測距收發前端，主要包括c波段調頻連續波（ fmcw ）頻率源，接收電路以及微帶天線。 -
In this paper, a ku band frequency source based on sampling phase lock loop technique is introduced. the vco of the loop is designed using dielectric resonator. the theory and design method is discussed and emphasized on
本文介紹了一個應用取樣鑒相和鎖相原理製作的微波ku波段頻率源（頻率合成器） ，其中的壓控振蕩器部分是用介質諧振器（ dr ）設計的。 -
In sce method, a sub - band frequency energy technique has been improved and a new technique which is based on phase plane technique has been proposed. four characteristic quantities have been extracted and used in data - analysis
統計特徵量方法中，改進了子帶能譜特徵量提取方法；獨立提出了散射信號相平面特徵量提取方法。 -
2 ) the sce shows potential of the application for sea bottom classification. both the improved sub - band frequency energy technique and the phase plane technique can distinguish completely the sea - beds : sand - type and silt - type
本文提出的相平面方法是一種新的辦法，對現有的兩類海底散射信號數據處理效果很好，其有效性需要進一步驗證。 -
Based on the fourier series digital approximation method, the optimal design of flat - top and high isolation pass band frequency response interleaver has been studied. at last a solution of high isolation ( > 45db )
用傅立葉級數展開數值逼近的方法進行了高隔離度平頂通帶頻響全光纖奇偶交錯濾波器的優化設計，提出了隔離度大於45db通帶平坦濾波器的製作方案。 -
Verification regulation of wide band frequency stability measurement set in time domain
寬頻帶頻率穩定度時域測量裝置檢定規程 -
In modern microwave and millimeter wave communication systems, the low phase noise frequency sources have the key effects in the systems ’ performance. especially in the national defence, the effects are more obvious. so in this paper, a method to realize the low phase noise x - band frequency source has been proposed, designed, produced and tested
在現代微波、毫米波通信系統中，低相噪頻率源對系統性能起著非常關鍵的作用，特別是在軍事國防上，這種關鍵的作用更加明顯，為此在本論文中，就如何實現x波段頻率源的低相噪性能，給出了一種設計方法並對其進行了實現。 -
Recently it has also been applied to rf ( ratio frequency ) fields, and valuable achievements have been reached. ‘ fractal ’ has space filling ability and self - similarity ability. ‘ fractal ’ is a recursively generated structure by iterated function systems. it has a fractional dimension and possesses a self - similarity property. the concept of a ‘ fractal ’ has been applied to antenna design in order to reduce the size of antenna and obtain multi - band frequency operation
分形具有空間填充能力和自相似性，分形是通過迭代函數系統產生的具有自相似性的分數維結構，分形的概念可用於天線設計以實現天線的尺寸減縮和多頻特性，這在軍用和民用方面都有著非常廣泛的應用前景。 -
One way to reduce timing jitter is the use of narrow - band frequency - guiding filters periodically distributed along the transmission line
控制孤子的時間抖動和相互作用的一個重要方法是在傳輸線中周期性地安放濾波器。 -
This thesis will base on the character of the w - band frequency synthesis generator, using its synchronization output, design out its pa module, and make it work under cw - wave and pulsed - wave condition. when the input power is 1mw, this kind of pa module can output 95mw or 65mw in 92. 5ghz or 96ghz, and the band - with is 200mhz or 300mhz
本文將針對w波段頻率綜合發生器的特點，利用其同步輸出埠，設計其功率放大模塊，實現對連續波或者脈沖輸出的功率放大，經測試，該種方案的w波段功率放大模塊，可以在92 . 5ghz和96ghz實現輸入功率1mw ，輸出功率分別為95mw和65mw的放大輸出，帶寬分別為200mhz和300mhz的。 -
Chaotic signal with continuous wide band frequency spectrum is not periodic and is similar with noise signal. these properties make it suitable to secret communication
由於混飩信號的非周期，連續寬帶頻譜，似噪聲等特點，特別適用於保密通信領域。 -
A " fractal " is a recursively generated structure having a fractional dimension and self - similarity property. the concept of a " fractal " has been applied to antenna design in order to reduce the size of antenna and obtain multi - band frequency operation. fractal antennas have broad application prospect in military and civil application
分形是通過迭代產生的具有自相似性的分數維結構，分形的概念可用於天線設計以實現天線的尺寸減縮與多頻特性，這在軍用和民用方面有著廣泛應用前景。 -
A " fractal " is a recursively generated structure having a fractional dimension and self - similarity property. the concept of a " fractal " has been applied to antenna design in order to reduce the size of antenna and obtain multi - band frequency operation. fractal antenna is useful in military and civil application
分形是通過迭代產生的具有自相似性的分數維結構，分形的概念可用於天線設計以實現天線的尺寸減縮與多頻特性，這在軍用和民用方面都有著很大的潛力。 -
The paper presents the schematic of s - band frequency synthesizer and the main circuits modules upon which, by considering the electromagenetic comptiblity ( emc ), fractional frequency synthesizer is fabricated by both pll and dds, the performance of the prototype product is carefully measured
並製作成功了高解析度、快捷變的小數頻率合成器的板級樣品。最後，還進行了樣品的性能測試，另外，還結合該實驗產品，進行了電磁兼容分析。
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