lna 中文意思是什麼

lna 解釋
低噪聲放大器。
接收機的第一級放大器，用來對手機接收到的微弱信號放大。
若該電路出現故障，手機會出現接收差或手機不上網的故障。

  1. We completed the layout of the differential lna, using the layout tool of cadence - - - - virtuoso layout editor

    使用cadence公司的版圖設計工具virtuosolayouteditor完成了上面設計的帶片上有源balun的差分lna的版圖設計。
  2. According to the application background and the dismatch between single antenna and differential lna, an active balun is needed and has been designed. then we put forward a design scheme that does co - simulation of an active balun and a differential lna on one chip together. at 2. 45ghz, this lna provides a forward gain of 28. 931db with a noise figure of 2. 485db, while drawing 19. 1ma from a 1. 8v supply

    從本設計的應用背景出發，考慮到單端天線與差分lna之間的不匹配性，設計了一個介於兩者之間的有源平衡轉換電路? balun （ balance - unbalunce ） ，並提出了將這個balun電路與前面設計的差分lna作為一個整體進行了模擬的設計方案。
  3. The in - depth analysis of the noise in gilbert mixer including parasitical capacitors, in which the mixer and lna have been connected together and the noise figure of mixer can be expressed explicitly as that of lna

    回在包括寄生電容的情況下，對雙差分對混頻器（ gilbertmixer ）的噪聲性能做了深入分析，把混頻器和低噪放聯系在一起，可像低噪放一樣，直觀的表達混頻器的噪聲系數。
  4. Low noise amplifier ( lna ) is widely used in front end of a received set of mobile communication 、 wireless radio 、 blueteech technology and so on 。 the active device is the core of the circuit and has significant effects on the whole equipment, therefore, the design of the active device is vital in lna

    微波低噪聲放大器（ lna ）廣泛應用於移動通訊、無線電、藍牙技術等的rf前端。 lna中的有源器件是整個電路的核心，對整個放大器電路的性能有著重要的影響，因此有源器件的設計是lna的關鍵技術之一。
  5. The subject comes from the cooperation project “ x waveband sar receiver ” between chengdu sine science & technology ltd. and the uestc. the auther is responsible for the demonstrability of the rf receiver and the implemetaion of the lna in the system

    本項目來源於電子科技大學成都賽英科技有限公司與電子科技大學的合作項目「 x波段合成孔徑雷達（ sar ）接收機」 ，筆者進行了該接收機系統方案的論證及接收機前端低噪聲放大器（ lna ）的研製。
  6. Chapter 2 introduces the principle theory of lna, harmonic mixer, multiplier, spdt, vco and the basic design flows of the ads examples ( x - band ), the power combine technology, the millimeter - wave power amplifier mmics ’ trends nowadays

    第三章介紹了毫米波前端中無源電路的設計，包括毫米波窄帶濾波器的設計、微波和中頻濾波器的設計、波導到微帶的過渡、微波信號的層間過渡。
  7. 3. with comprehensive improvement of transponder including structural adjustment to lna ; optimization of ( phase locked loop ) pll filter ; structural adjustment to the transmitter and phase error adjustment to the intermediate frequency demodulation circuit, we have successfully enhanced sensitivity, expanded dynamic range, increased transmitting power and improved the spectrum purity ; decreased capture time for pll ; improved the signal quality after demodulation ; reduced its volume and power consumption. 4

    3 、對通信機的全面改進，包括lna結構的調整、鎖相環環路濾波器的優化、發射部分結構的調整以及中頻解調電路的相差調整，提高了系統的接收靈敏度、改善了本振的頻譜純度、減少了鎖相環的鎖定時間、使中頻解調后的信號質量大為提高，同時還減少了體積、節約了系統的功耗。
  8. So, we designed a fully integrated low noise amplifier ( lna ) for 2. 4ghz rf front - end receiver on satellite

    針對此，本論文完成了一個2 . 4ghz衛星射頻前端接收電路的全集成差分cmos低噪聲放大器（ lownoiseamplifier ）的設計。
  9. It is shown that neglecting the gate - drain capacitance of the mosfet would lead to an overestimation of the optimum device width in the cmos source degenerated lna

    本文證明了在cmos源端degeneration結構的低噪聲放大器中，忽略場效應管的柵漏電容將造成對放大管的最優柵寬估計過大。
  10. The rf receiver consists of rf front end and baseband regulation module. the high - intermediate - frequency superheterodyne structure is adopted in the final scheme. the fine sensitivity of the receiver is achieved by two cascaded lna in the front of the system

    系統採用超外差式變頻結構設計，兩級低噪聲放大單元級聯保證了接收機靈敏度，兩級增益控制單元實現了所要求的接收機動態范圍，並且整機的線性度也得到了保證。
  11. The conclusion is that the designed lna has smaller manufacture size and better measurement results than the conventional one

    結果表明：採用多次曲折線的形式使實際樣品加工尺寸大大縮小；場路混合模擬的設計方法精度高，樣品實測性能大大優于預期指標。
  12. T / r module is a functional module for the new radar, that is active phase control array radar, and t / r nodule system - integrates high frequency switches, phase shifter, lna and power amplifier, etc. if using low cost thick film technology to manufacture t / r module, it will be benefit to accelerate the applicants and development of the active phase control array radar

    T r模塊是實現新型雷達? ?有源相控陣雷達需求的功能模塊，它系統地集成高頻開關、限幅器、移相器、 lna及功放等。利用厚膜的廉價成膜工藝技術製作t r組件模塊，則有利於加速有源相控陣雷達的應用與發展。
  13. The lna with source inductor degeneration is analyzed in detail, which is used most widely in current. base on the analysis, a cascode structure is presented to minimize the effect of gate - drain capacitance cgd

    針對目前lna中應用最廣泛的源極電感負反饋結構，進行了詳細分析，在此基礎上對該結構做出了優化，採用共源共柵級聯結構，減小了柵漏電容cgd的影響。
  14. The lna is one of the most important and broad components in microwave communication system receiver, and is used to amplify the low level signal. as the first signal processing block after the antenna, the lna determines the noise figure and input voltage swr and greatly impacts the dynamic range

    低噪聲放大器（ lna ）廣泛應用於微波接收系統中，是重要器件之一，主要用來放大低電平信號，由於是自天線下來第一個進行信號處理的器件， lna決定了整個系統的噪聲性能和電壓駐波比vswr ，並對動態范圍有著較大的影響。
  15. Secondly, a method which can prejudge the gain and noise figure of the low noise amplifier ( lna ) is put forward. with this method, we can prejudge the feasibility of lna design once the s - parameter and noise parameter of the device are gained. the design process is considerably simplified compared with traditional methods

    隨后對低噪聲放大器進行了探討，提出了一種可預測增益和噪聲系數的方法，只要知道器件的s參數和噪聲參數，就能對放大器設計的可行性進行預測，相對于傳統作法，設計過程得到了大大簡化。
  16. Low noise amplifier ( lna ) is a key component in the front - end of rf transceiver

    低噪聲放大器（ lna ）是無線收發機前端的關鍵電路之一。
  17. Greatly different from previous works, the matching circuits and dc bias networks are bent many times, for minimizing the lna

    與以往同類工作有很大不同，為了實現lna小型化的目的，對匹配電路和直流偏置網路採用多次曲折線的形式。
  18. In this paper, the traditional cascode structure of cmos lna is considered as a two - stage amplifier and inter - stage matching network is introduced accordingly

    本文也對cmos低噪聲放大器進行了分析，將傳統共源共柵結構看作二級放大器級聯形式，並由此引入級間匹配網路。
  19. Moreover, an optimized lna structure - inter - stage inductor matching - is presented, which can achieve conjugate match of two stages, maximize the forward transmission, sequentially increase the signal noise ratio ( snr ) and reduce the noise figure

    並提出了級間匹配電感的設計方案，此優化結構能實現兩級之間的共軛匹配，使信號的正向傳輸最大化，從而增大信噪比，降低了噪聲。
  20. This ku - band three channel receiver consists of spst modules, lna modules and image rejection mixer modules. these modules were designed and tested separately, then were assembled to the whole receiver. all the circuits were designed with small - sized devices so as to reduce the total size of the receiver. and the noise figure was considerably reduced because of the image rejection mixer

    另外，由於採用了鏡像抑制混頻器，從而使整機噪聲系數大為降低。在設計方法上，本文採用了先進的微波電路設計軟體ansoftserenade對所有的電路和系統進行設計、優化和模擬，大大的縮短設計周期，提高設計效率。
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