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heterodyne

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heterodyne n.【無線電】外差法，【無線電】外差法的，成拍的。vt....

n. 【無線電】外差法，【無線電】外差法的，成拍的。 vt.,vi. (使)成拍，(使)致差，(使…)混合。 “auto heterodyne“ 中文翻譯：   自差, 自差電路“equal heterodyne“ 中文翻譯：   等輻外差法; 等幅差拍; 等幅外差法“heterodyne action“ 中文翻譯：   外差作用“heterodyne analyzer“ 中文翻譯：   外差分析器; 外差分析儀; 外差式分析器; 外差式分析儀“heterodyne beat“ 中文翻譯：   外差拍頻“heterodyne capacitor“ 中文翻譯：   外差電容器“heterodyne circuit“ 中文翻譯：   外差電路“heterodyne converter“ 中文翻譯：   多差式變頻器; 外差變頻器; 外差式變換器; 外差式變頻器“heterodyne detection“ 中文翻譯：   外差檢波; 外差檢測; 外差式檢波“heterodyne detector“ 中文翻譯：   外差式檢波器; 外差探測器“heterodyne filter“ 中文翻譯：   外差濾波器; 外差式濾波器“heterodyne frequency“ 中文翻譯：   外差頻率“heterodyne frequencymeter“ 中文翻譯：   外差式頻率計“heterodyne hologram“ 中文翻譯：   外差全息圖“heterodyne ineterferometer“ 中文翻譯：   外差干涉儀“heterodyne interference“ 中文翻譯：   外差干擾“heterodyne measurement“ 中文翻譯：   外差法測量“heterodyne method“ 中文翻譯：   外差法“heterodyne modulation“ 中文翻譯：   外差調制“heterodyne oscillator“ 中文翻譯：   外差振蕩器。 “heterodyne receiver“ 中文翻譯：   外差式收音機。 “heterodyne reception“ 中文翻譯：   外差接收法“heterodyne repeater“ 中文翻譯：   外差式中繼器; 外差中繼器; 外差中繼站“separate heterodyne“ 中文翻譯：   獨立本機振蕩外差法; 分激外差法; 他激外差法“heterodynamous insects“ 中文翻譯：   異動態昆蟲:有季節性繁殖動態的昆蟲“heterodynamous insect“ 中文翻譯：   異動態昆蟲

heterodyne oscillator

According to the characteristic of digital adaptive heterodyne filter and the conception of interference counteraction , the paper presents a new structure to enable the filter track the interference signal precisely and control the width and depth of notch . through simulation , it is demonstrated that the new structure can suppress one or more interference signals and the filtering operation has little influence on signal spectrum 論文利用數字自適應外差濾波器的特點，運用干擾抵消的概念，提出了一種新的結構，能使濾波器精確跟蹤干擾信號，并能控制陷波的寬度和深度，經仿真驗證，該結構的濾波器能較好的抑制一個和多個干擾，同時濾除干擾后對信號頻譜的損害較小。

Abstract : this paper analyzes the non - symmetry of elliptic polarization oftwo linear polarized beams , which are perpendicular to each other , caused by their reflecting from a metal mirror . also , it studies the non - linear error created by polarization and how the errors change . the study is very important for improving the measuring accuracy of polarized heterodyne interferometer 文摘:主要分析兩束相互垂直的線偏振光經過金屬反射鏡反射后引起的橢圓偏振化的不對稱性，并研究由此產生的非線性誤差的變化規律，這對提高偏振光外差干涉儀的測量精度是極為重要的。

Research on cmos implementation of wlan transceiver rf front - end is done in this thesis . the transceiver uses the most used super - heterodyne architecture , its rf front - end consists of low noise amplifier , down - converter , up - converter , preamplifier , lo buffer and pll frequency synthesizer 本論文研究無線局域網收發機射頻前端的cmos實現，該收發機采用超外差式的拓撲結構，其射頻前端主要由低噪聲放大器、下變頻器、上變頻器、末前級、本地振蕩信號緩沖器和鎖相環型頻率合成器等模塊組成。

By using irm , heterodyne receiver with good image rejection and mmw - to - if once frequency conversion can be realized , which simplified receiver constitution prominently . the number of local oscillation ( lo ) sources is reduces and electromagnetic compatibility ( emc ) of mmw system is improved . also , the size , weight , power consume and cost of mmw receiver is reduced 采用毫米波鏡頻抑制混頻器,可在保證鏡頻抑制性能的前提下,采用1次變頻接收機,從而大大簡化接收構成,減少本振數量,改善毫米波系統電磁兼容性,減小接收機體積、重量、功耗,并降低成本。

And typical super heterodyne structure in rereiver part . this scheme benefited to reduce frequency error and phase error , and had the advantages of good dynamic range and selectivity , short exploitation cycle and small venture in the given performance demand , etc . this system implemented a six - layer hoard rf handset model together with baseband by using advanced eda tool veribest 2000 系統設計應用hd155131的gsm900 dcs1800雙頻解決方案，發射機部分主要采用offsetpll方案，該方案有利于減小系統的頻率誤差和相位誤差；接收機部分采用典型的超外差式結構，它具有優良的動態范圍和選擇性，在給定的性能要求下具有開發周期短、風險小等特點。

In order to improve the existing pr adaptive optical heterodyne detection system ( praohds ) , a new praohds is proposed based on sppc and mppc coexistence . the experimental study of the system is completed by equal amplitude ar + laser beams , poorly coherent equal amplitude solid - state laser beams and high speed amplitude - modulated solid - state laser beams through distorting media . experimental results indicate that the new system is applicable 為了改進現有的光折變自適應光外差探測系統( praohds ) ，本文利用sppc和mppc同時共存的特性，提出了一種新型的praohds ，并利用ar ~ +等幅激光、相干性較差的固體等幅激光以及固體高速振幅調制激光對新系統進行了畸變光束的自適應光外差探測實驗研究，結果證明了新系統在實際應用中的可行性。

The double - frequency laser interferometer belongs to the heterodyne interferometer . it has been proved that this kind of interferometer possesses the advantage of having a higher transform gain , better wave - filter capacity and high spatial resolution . furthermore , this kind of interferometer can filter out background light interference and obtain a measuring signal with high signal / noise ratio 雙頻激光干涉儀是一種外差干涉儀，理論分析證明：外差干涉具有高的轉換增益、良好的濾波性能及優異的空間鑒別能力，能有效地濾除各種背景光干擾，得到信噪比很高的測量信號。

The signal - to - noise ratio of the nondestructive testing system employing optical heterodyne and ultrasonic techniques is analyzed and calculated from two aspects including phase matching of optical heterodyne measurement in nondestructive testing and the effects of beam incidence on the intensity of heterodyne signal and signal beam 對光外差超聲無損探傷系統的信噪比從兩個方面入手進行了計算分析:第一,光外差測量在無損探傷中的相位匹配;第二,光束入射角對信號光光強和外差信號強度的影響。

This paper analyzes the non - symmetry of elliptic polarization oftwo linear polarized beams , which are perpendicular to each other , caused by their reflecting from a metal mirror . also , it studies the non - linear error created by polarization and how the errors change . the study is very important for improving the measuring accuracy of polarized heterodyne interferometer 主要分析兩束相互垂直的線偏振光經過金屬反射鏡反射后引起的橢圓偏振化的不對稱性，并研究由此產生的非線性誤差的變化規律，這對提高偏振光外差干涉儀的測量精度是極為重要的。

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,毫米波頻段通常采用超外差接收機,混頻器作為第一級就成為關鍵部件。由于在毫米波頻段,同頻段高性能的本振源成本高,技術難度大,采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。

For the heterodyne interferometer used within the nanometer and sub - nanometer region , the frequency leakages due to the imperfect optical elements and the thermal non - linearity drift restrict its uncertainty to about 20nm . a more comprehensive theoretic analysis for this non - linearity of heterodyne interferometer is given 從理論上研究了雙頻激光干涉儀非線性誤差產生的原因；分析了直流偏量、等幅性偏差、正交誤差對比相法相位測量結果的影響； 4

The scheme is designed based on these researches . for traditional laser rang finders , most of them use heterodyne method as the phase shift measurement . the advantage of heterodyne method is the high measurement accuracy , but its disadvantage is the low measurement velocity 傳統的相位激光測距大部分都采用差頻數字測相,差頻測相的優點在于由于頻率的降低,這樣必然意味著測距精度的提高,但其缺點是測距速率低。

Based on this , we bring forward a availability and viable distributed fiber sensing for temperature and strain system that based on spontaneous brillouin scattering , coherent self - heterodyne botdr , and done part experimental study 在此基礎上,提出了一種有效可行的基于布里淵散射的分布式光纖溫度/應變傳感系統? ?相干自外差的布里淵散射分布式光纖傳感系統,并完成了部分實驗研究。

Be different with other botdr systems , the coherent self - heterodyne botdr system uses only one consecutive laser . the light from consecutive laser is divided into two beams , the detecting light and the reference light , by a coupler 與其他的botdr系統分別使用兩臺激光器不同,自相干外差的布里淵散射分布式光纖傳感系統采用一臺激光器,經耦合器分為兩路光束? ?探測光和參考光束。

The testing principle of the system is explained and the two components of the system including the optical heterodyne measurement system and the system of ultrasound pulse generated by a laser pulse are introduced 課題采用一種結構簡單、易調試的光外差超聲無損探傷系統,對其探傷機理進行了說明,介紹了組成系統的兩部分:光外差測量系統和激光脈沖激勵超聲部分。

More , this paper discusses some important performance parameters of the coherent self - heterodyne botdr system , such as dynamic ranges , spatial resolution , minimum detectable change 在此系統基礎上,本文討論分析了相干自外差探測系統以及該botdr系統的動態范圍、空間分辨率、最小可探測溫度/應變變化量等重要性能參數。

Most laser ultrasonic nondestructive testing systems are based on the heterodyne principle , but the laser ultrasonic nondestructive testing system which is based on the homodyne principle 而且目前所研制的激光超聲無損檢測系統基本上采用外差干涉的方式,而零差干涉方式國內尚未見到有相關報道,這屬于論文的主要創新點。

In chapter 3 the type ， characteristic and basic principle of ionized wake diagnosis system of microwave interferometer is introduced ， include the reflection interferometer and heterodyne interferometer 較詳細地介紹了微波在等離子體中傳輸、反射、折射和截止的理論和條件，并說明了等離子體微波測量的理論基礎。

While stationed in france during world war i , armstrong improved his radio receiver design by inventing what ' s known as the “ super heterodyne “ radio receiver 當駐防在法國在第一次世界大戰期間,阿姆斯壯改進了他的無線電接收機設計經過發明什么為人所知如同“超級外差“無線電接收機。