ka band 中文意思是什麼

ka band 解釋
ka頻段
  • ka : KA, ka＝kiloampere. n. 〈埃及語〉【宗教】（古埃及人或偶像的）靈魂，鬼魂，陰魂。
  • band : n 1 帶，繩；帶形物；箍；箍條；嵌條；鑲邊；鋸條； 〈pl 〉 （法官等的）寬領帶。2 束縛，羈絆；義務；...
  1. Based on those and the practical needs of some projects, the thesis mainly focuses on two different kind millimeter mixers : a ka band mixer and an ehf band mixer

    根據以上分析和應用項目的實際需要，最後本文集中於對兩種混頻器的研製：一種ehf頻段混頻器；一種ka頻段混頻器。
  2. Performance of turbo codes in ka - band mobile satellite channels

    碼的糾錯性能研究
  3. The experimental result expresses that the frequency doubler - power amplifier sets of ka - band can supply good local oscillation source for " millimeter - wave front - end of " lmds " ". the model has the advantages of low cost, small size and high reliability

    實驗結果表明，倍頻放大組件能夠為lmds毫米波前端提供很好的本振源，並且具有成本低、體積小、可靠性高等優點。
  4. A ka - band bpf would be developed and used in the rardar system

    同時製做一隻ka波段的波導濾波器，用於毫米波合成孔徑雷達系統中。
  5. The major job is manufactured a transmitter, which has three upmixer channels. its function is to up convert the signals from c - band to ka - band. the input local oscillator is provided by a low frequency crystal oscillator which has a good performance of phase noise, through 512 times multiply to ka band. this sysetem is used in the laboratory as transmitter source of the fuze, for the multidimensional objects in practise, which lead to the complexity of the reflect signal, so the amplitude, frequency and the phase of the transmit signals both have a key role in dealing with the reflection signals. therefore, this system requires for both the coherence of the single channel ’ s amplitude, phase and multi channels

    本文的主要工作是應用戶要求製作一具有三發射通道的上變頻系統，可以將c波段的微波信號上變頻到ka波段的毫米波信號。系統的本振輸入基頻由一相位噪聲非常好的低頻率晶振提供，經過512次的倍頻放大至ka波段。本系統作為實驗室中引信的發射源，由於目標反射信號具有時變的多維性，反射信號變得極為復雜，在信號處理時，不僅信號幅值、頻率有決定意義而且相位關系也很有決定意義。
  6. In active section, in order to meet performance of out put power above 10dbm, the power amplifier module of ka - band is fabricated by using hmc283 to achieve the 14db conversion gain. there are five parts that include of waveguide - to - microstrip ? mixer ? filter ? power amplifier and waveguide - to - microstrip. input signal ' s power is 10dbm, after it pass waveguide - to - microstrip, it ' s frequency is escalate from 30ghz to 35ghz

    該組件由五個部分組成：功率為10dbm信號經過波導? ?微帶過渡，然後混頻，濾波將30ghz提高到35ghz濾除不需要的諧波鏡頻以及三階交調信號，為了彌補混頻濾波的變頻損耗，加一級功率放大器，此放大器採用hittle公司hmc283晶元，此上變頻放大組件完成了上變頻?濾波?放大功能。
  7. The dissertation is mainly on the theory and design of the frequency doubler - power amplifier sets of ka - band. in the passive circuit, we analyzed the characteristic of microstrip and coupled microstrip

    在無源電路部分，我們首先對微帶線、耦合微帶線的傳輸特性和微帶-波導過渡的基本原理進行了分析。
  8. In the active circuit part, based on the theories of multiplier of srd and fet, we have designed the circuit of x band 6 multiplier and ka band tripler. then they are simulated and optimized using harmonic balance method. furthermore, the results of optimization and experiments are analyzed

    在有源電路部分，我們介紹了階躍管、 fet倍頻器的基本原理，在此基礎上分別設計了兩個倍頻器電路，然後利用諧波平衡法進行了模擬，並對模擬、測試結果作出了比較。
  9. The design of ka - band coupled - cavity traveling wave tube amplifier

    Ka波段耦合腔行波管放大器設計
  10. The measured back - to - back insertion loss is less than 1. 0db and return loss is better than 10. 0db within the entire ka - band

    在整個ka頻段內實測的背對背插損均小於1 . 0db ，回波損耗優於10 . 0db 。
  11. Chapter six realizes the ka band 0 - pm t / r component on the basis of above - mentioned function parts

    第六章在前述各個功能部件的基礎上實現了ka波段0 -調相收發組件。
  12. Ka - band mobile satellite cdma system robust to doppler shift

    非靜止軌道衛星通道多普勒頻移特性
  13. In the paper, the transition of ka band rectangular waveguide to micro strip probe and the back - to - back structure are designed. the measurement results indicated the low insert loss and low return loss from 35 ghz to 40 ghz

    本文設計了ka波段矩形波導到微帶探針過渡結構以及背對背結構，測試結果表明，在35 40ghz頻率范圍內，其插入損耗和回波損耗都比較小。
  14. Smart ka - band phase locked and frequency multiplying source

    頻段鎖相倍頻源
  15. Based on the results of the theory analysis and computer simulation of suspended stripline low pass filter, band pass filter, the transition from waveguide to finline and the transition from waveguide to suspended stripline, the structure design and manufacture were made. the measured results match the requirement. different from the traditional mixers used in the domestic communications satellites, the sub - harmonic balance mixer type was used in the ka - band mixer design

    在ka頻段混頻器的研究過程中，通過對衛星和飛船所用到的混頻器進行研究，在對ka波段的傳統射頻前端電路的分析基礎上，提出改變以往星上傳統的基波混頻方案，採取了次諧波混頻方案，降低了本振頻率，簡化了本振鏈路，使噪聲特性、可靠性獲得改善。
  16. Firstly, the characteristics of millimeter - wave and its applications are introduced. it also gives the latest development of the ka - band solid state impulse - transmitter and its correlation components

    論文首先論述了毫米波的特點及其應用，並簡要介紹了毫米波固態脈沖發射機及其相關部件的發展概況以及本文的研究意義。
  17. The millimeter wave diplexers used in the ka - band satellite communications are investigated. these diplexers are of high working frequency, narrow passband and high selectivity, which demands the channel filters good performance

    所研究的毫米波雙工器工作頻率高（接近40ghz ） ，收發通道帶寬窄、接收頻率和發射頻率間隔很小。
  18. The antenna is obtained by extending the longitudinal strip of the fin - line, and etched on a metallized dielectric substrate. it is operating at ka band ( center frequency : 34ghz ), which has a good agreement between simulated and measured results. its e - and h - plane 3db main lobe beamwidth are 79. 25 and 80. 03 degrees respectively with sidelobes less than - 10db

    天線工作的中心頻率為34ghz ， e面和h面測試方向圖主瓣寬度分別為79 . 25o和80 . 03o ，旁瓣電平均小於- 10的db ，模擬和試驗結果基本一致，所設計天線的各項指標經測試基本達到要求。
  19. Design of a high output power, high combining efficiency power combiner at ka - band based on a slotted - waveguide was presented in this thesis. slotted - waveguide power divider, which achieves power - dividing and waveguide - microstrip transition at the same time takes the advantages of low profile, low cost and high combining efficiency

    用開槽波導同時完成功率分配/合成及波導-微帶過渡，具有體積小、合成效率高的特點，既不屬于空間功率合成又與傳統的電路合成有所區別。
  20. For the operating frequencies of modern radars and guidance 、 electronic countermeasure system 、 communication system 、 remote sense and remote measurement system expand to millimeter band step by step, the operating frequencies of t / r module raise ceaselessly. simultaneity millimeter wave t / r module which has the advantages of small dimension, lightweight, wide band is more suitable to the requirement of modern army and communication system. this paper is mainly referred to the research of t / r module in ka band

    現代雷達與制導、電子對抗、通信、遙感遙測系統的工作頻率已逐步由微波波段擴展到毫米波波段，因此t / r組件的工作頻率也在不斷的上升，同時，毫米波t / r組件與微波t / r組件相比具有尺寸小、重量輕、頻帶寬等優點，更適合現代軍事和通信系統的要求。
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