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- harmonic frequency generator 諧頻發(fā)生器
- With HTS Josephson junction as the mixing element, 50th harmonic frequency mixing at 3mm wave band is obtained on the system. 在該系統上成功實(shí)現了高溫超導混頻器在3毫米波段的50次諧波混頻。
- A filter with a tuning frequency more than 10% below the lowest harmonic frequency with considerable current/voltage amplitude. 在相當大的電流/電壓幅值時(shí).;濾波器的調諧頻率比最低值的諧波頻率還要低10%25以上
- The heterodyning principle is well known in nonlinear optics as difference frequency generation (DFG). 在非線(xiàn)性光學(xué)領(lǐng)域,超外差原理就是著(zhù)名的差頻產(chǎn)生(DFG)技術(shù)。
- A high efficiency dual-band RF power amplifier has an output and/or input of a high frequency transistor well terminated at the second harmonic frequency for dual-band operation. 本發(fā)明乃一種高效率雙頻射頻功率放大器，提供高頻電晶體的輸出端與?或輸入端于雙頻操作中有良好的二階諧波終止。
- Purpose: Audio frequency general purpose ,driver stage amplifier applications. 用途:用于音頻放大,激勵級放大。
- Various wavelength conversion (WC) techniques are introduced, and two are chosen to be used in all optical transparent networks. These are four wave mixing (FWM) and difference frequency generation (DFG). 該文首先簡(jiǎn)單介紹各種波長(cháng)變換技術(shù);對比它們的優(yōu)缺點(diǎn);選出兩種能用于未來(lái)全光透明網(wǎng)絡(luò )中的波長(cháng)變換技術(shù):四波混頻波長(cháng)變換技術(shù)和差頻波長(cháng)變換技術(shù).
- Harmonic frequencies in the power grid are a frequent cause of power quality problems. 諧波頻率在電網(wǎng)中是造成電能質(zhì)量問(wèn)題的常見(jiàn)原因。
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO?3 waveguides have been theoretically studied. 對基于級聯(lián)和頻差頻非線(xiàn)性效應鈮酸鋰光波導新型全光波長(cháng)轉換器進(jìn)行了理論研究。
- The principle of all-optical wavelength conversion based on the cascaded sum and difference frequency generation (SFG+DFG) in quasi-phase-matched (QPM) periodically poled LiNbO3 (PPLN) waveguides is introduced. 介紹了基于準相位匹配周期極化反轉鈮酸鋰光波導的和頻與差頻(SFG+DFG)級聯(lián)型全光波長(cháng)轉換技術(shù)的基本原理。
- In chapter five, the generation principle of THz-wave is introduced. The generation of THz-wave using Cerenkov-type difference frequency generation (DFG) is also discussed theoretically. 第五章討論了THz波的產(chǎn)生機理,并對切倫科夫型差頻產(chǎn)生THz波進(jìn)行了理論分析。
- Unfortunately, they also suffer from some disadvantages, such as poor rejection to outside passband, and they are easily to be disturbed by high order harmonic frequencies. 但是也都存在一些共同缺陷，諸如帶外抑制能力較差，容易受到高次諧波分量的干擾等等。
- All-optical wavelength conversion (AOWC) is mainly implemented by using four nonlinear effects: cross gain modulation (XGM), cross phase modulation (XPM), four wave mixing (FWM), and difference frequency generation (DFG). 實(shí)現全光波長(cháng)轉換主要利用四種非線(xiàn)性效應 :交叉增益調制 (XGM)、交叉相位調制 (XPM)、四波混頻 (FWM)和差頻 (DFG)效應。
- Recently, SFG (sum frequency generation vibrational spectroscopy) has been developed into a powerful technique to probe in-situ surface composition and orientation information at submolecular level. 近年來(lái)發(fā)展起來(lái)的和頻振動(dòng)光譜(SFG)能在準單分子層水平上原位研究聚合物表面的基團及其取向等信息，被認為是表征聚合物界面結構的最佳技術(shù)手段之一。
- Harmonic Frequency Synthesizer and FSK Modulator 諧波頻率合成器與FSK調制器
- A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO3 waveguides have been theoretically studied. 對基于級聯(lián)和頻差頻非線(xiàn)性效應鈮酸鋰光波導新型全光波長(cháng)轉換器進(jìn)行了理論研究。
- harmonic frequency of loudspeakers 揚聲器諧振頻率
- harmonic frequency characteristic 諧波頻率特性
- graded harmonic frequency telegraphy 分級諧頻電報
- Voltage and frequency generated by synchronous generator vary along with the wind variation, so the power must be dealt with before it is applied to grid. 同步直驅風(fēng)力發(fā)電系統的定子電壓和頻率隨風(fēng)速的變化而變化,需要經(jīng)過(guò)一系列控制電路的調整才能并網(wǎng)。
