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- planar sum and difference network 平面和差网络
- Model for Microwave Sum and Difference Network of Monopulse Radar with Amplitude- Comparison 比幅和差式单脉冲雷达微波和差器建模
- sum and difference network 和差网络
- Sidebands (08, 20) Sum and difference tones generated during modulation. 旁波帶(08,20)調變時產生的音調和與差。
- A model of pick-up the monopulse ration is proposed based on researching on digital sum and difference beamforming principle of phased array radar. 摘要在对相控阵雷达数字化单脉冲和差波束形成原理研究的基础上，给出了单脉冲比的提取模型。
- We analyze the pattern function of DBF in subarray under the ideal condition and with channel mismatch, and give the pattern functions of sum and difference beam. 基于恢复理想信号频谱的逆滤波原理,利用通道均衡法对接收通道的失配进行了校正。
- Sum and difference patterns of amplitude dual-plane monopulse radar is more widely paid attention to using because that it doesn't need to have strict receive channel. 而对于接收支路要求不太严格的双平面振幅和差式单脉冲雷达，更是备受青睐。
- The former one is now widely used in the monopulse system to calibrate the amplitude and phase imbalances between the sum and difference channels by injecting test signals. 离线校正的方法是现阶段单脉冲雷达系统进行和差通道幅相校正采用的主要方法，它通过注入测试信号的方法来得到对误差接收通道幅相特性的估计。
- It not only can implement the digital pulse compression and coherent integration for radar sum and difference signals, but also control the whole radar system. 能实现雷达和、差信号的数字脉冲压缩与动目标检测，并控制着整个雷达系统的运行。
- They are the property of sum and difference beams, the errors of the elements and channels and different pulse repeating frequency(PRF). 这些因素包括和差波束的特性、阵元和通道的误差、不同的脉冲重复频率(PRF)。
- That the Sermon on the Mount contains the sum and substance of Christianity. 耶稣登山训众论福所讲的一切包含了基督教的精义。
- We analyze the pattern function of DBF in subarray under the ideal condition and with channel mismatch, and give the pattern functions of sum and difference beam. We correct the reception channel mismatch by using the channel equalization method. 通过对子阵DBF在理想条件及通道失配情况下的方向性函数分析;得出了其和差波束方向性函数特性.
- 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. 介绍了基于准相位匹配周期极化反转铌酸锂光波导的和频与差频(SFG+DFG)级联型全光波长转换技术的基本原理。
- This dissertation discusses mainly the analysis of ground clutter spectrum in sum and difference channels for airborne phased array radars(APAR), and the design of the radar signal simulation resource and the video output of the APAR simulator. 本文以机载相控阵雷达视频信号模拟器的研制为背景，以实现和差通道的目标和杂波模拟为重点，对该系统的雷达时序产生和系统的视频输出等问题的设计和实现进行了较深入的研究。
- Technical specifications are all satisfied within required wide frequency range, which include VSWR, main beam width, sidelobe level, gain, and the mutual relation of sum and difference patterns, etc. 在较宽的频带内，对于驻波比，主瓣宽度，旁瓣电平，增益，和 与差方向图对应关系等都得到了满足。
- This is the sum and substance of his opinion. 这便是他的意见的要点。
- The sum and substance of the speech was antiwar. 这个演讲的主要内容是反战的。
- Having alternating currents of two different frequencies that are combined to produce two new frequencies, the sum and difference of the original frequencies, either of which may be used in radio or television receivers by proper tuning or filtering. 外差的由两股不同频率的交替电流联合产生两个新的频率的，原频率的总和及差拍均可通过适当调频或滤波用于无线电或电视接收
- sum and difference stereo device 和差立体声装置
- sum and difference patterns of amplitude 振幅和差
