The utility model adopts surface acoustic wave filter, and the circuit is simple to realize. 采用声表面波滤波器,电路实现简单,调整方便,一致性好。
Based on principals of interference of acoustic waves and simplified digital delay-line, comb filter effect induced by superposition of reflections from steps is presented. 从声波干涉的基本原理出发,通过数字延时线的简化分析,说明了多级台阶反射声的叠加对声波频率产生的梳状滤波效果。
A Study of Defected Ground Structure Filters and Thin Film Bulk Acoustic Resonator Filters; sound surface wave multichannel filter assembly 缺陷地面结构滤波器和薄膜声体波谐振器滤波器研究声表面波多通道滤波器组件
Study on Bulk Acoustic Wave Ladder Filter Using AlN Thin Film Research on Waveform Modulation Technique for Staircase Inverters AlN薄膜体声波梯形滤波器的制备与性能分析阶梯波合成逆变器的波形调制技术研究
Sound surface wave band pass filter e acoustic wave pulse compression filter 声表面波带通滤波器声表面脉冲压缩滤波器
PUS ( Passive Ultrasonic Sensor) e acoustic wave pulse compression filter 被动式超声波传感器声表面脉冲压缩滤波器
E acoustic wave pulse compression filter 声表面脉冲压缩滤波器
Exploration on Teaching of Surface Acoustic Wave Filter and Developing Students 'Comprehensive Ability 声表面波滤波器教学与学生综合能力培养的探索
Design of a RF Bulk Acoustic Wave Filter Using PZT Thin Film 采用PZT薄膜的体声波RF滤波器设计
Mathematics calculations and diagrams show that: short circuit instigate drop admittance has profound correspondence physics significance for surface acoustic wave filter, and the characteristic of division digital transducer can be described and designed using transmission line model. 通过数学推导和图解表明:短路策动点导纳对声表面波滤波器有着对应的物理意义,用传输线模型可对分裂指换能器的特性进行精确的描述和设计。
The investigation revealed that the first order of the acoustic modes of air-in filter coincides with the foundation frequency of induction noise, and that the couple in frequency domain makes the sound pressure of left side be higher than right side where exhaust system was settled. 研究发现空滤器声系统的第一阶声固有频率与进气噪声基频相耦合是造成该车辆进气侧通过噪声高于排气侧的重要原因。
Based on Acoustic Optical Tunable Filter ( AOTF) spectroscopic technique, the measuring feasibility for principal milk constituents by Near-Infrared spectroscopy was investigated. Combining developing of the measuring system, reliability thermal design methods suited for the system were discussed and applied. 论述了基于声光可调谐滤光器(AOTF)的乳品成分近红外光谱测量方法,并针对测量系统进行了可靠性热设计。
Iterative near-field acoustic holography with k-space filter 波数域滤波迭代近场声全息
Post Processing of Passive Acoustic Localization Based on Kalman Filter 基于Kalman滤波的被动声定位后置处理
Evolutionary Design for Surface Acoustic Wave Filter 声表面波滤波器进化设计
Study on Pressure Drop and Acoustic Propagation Characteristics of Diesel Particulate Filter 柴油机微粒过滤器的压降与声传播特性研究
Application of surface acoustic wave filter in television 声表面波滤波器在电视机中的应用
Evolutionary design for surface acoustic wave filter based on genetic algorithm 基于遗传算法的声表面波滤波器进化设计
This paper also analysis the EMC of the element in PCB. For the surface acoustic wave filter offered from certain academe, material analyse and account have adopted in the finding route of coupling and the measure of anti-jamming. 论文分析了PCB上器件的电磁兼容,对具体的某研究所提供的声表面波滤波器,在找出干扰途径以及采取对应措施过程中进行了具体分析计算。
Compared with the surface acoustic wave filter with same period and same size of all fingers of interdigital transducers, the frequency response of that which based on evolutionary design is improved greatly, especially in its side lobe suppression. 与典型的等周期、等指长的声表面波滤波器相比,采用进化方法设计,极大地提高了滤波器频率响应性能,旁瓣抑制得到了改善。
Data Fusion Algorithm of Object Location in Acoustic Array with Extended Kalman Filter 基于扩展Kalman滤波的声阵列定位数据融合算法
Subband Acoustic Echo Cancellation Based on Adaptive Filter 子带自适应回声抵消
This paper presents a wavelength demodulation method based on FBG reflect filter technology, by using Acoustic Optic Tunable Filter ( AOTF) to dynamically scan the reflected spectrum. The theoretical deducing and analysis of the system are introduced in detail. 文中介绍了一种基于光纤光栅反射滤波技术,利用声光滤波器(AOTF)对反射谱进行动态扫描的波长解调方案,并给出了详细的理论推导和分析。
A Study on Acoustic Characteristics of Diesel Particulate Filter in the Operating Diesel Engine 柴油机微粒过滤器热态声学特性研究
Surface Acoustic Wave Filter ( SAWF) is a sort of analogue device for signal processing. 声表面波器件是一种新型的模拟信号处理器件。
Analysis of the response of surface acoustic wave filter using admittance parametric 应用导纳参量分析声表面波滤波器的响应
Use method ( 1) named "the programmable trapping wave", which is merged with frequency spectrum convert in linear, Direct Digit Synthesizer and Surface Acoustic Wave Filter, to open a communication band in jam-band willfully. 使用融合了线性频谱搬移技术、数字频率合成技术以及声表面波滤波技术的可编程陷波法,在干扰频段内任意开辟出通讯频段窗口;
The method of temperature compensation is employed to fix the error caused by the change of sound velocity, and the method of acoustic impedance transform and Matched filter is employed to improve the signal to noise ratio of echo. 2. 采用温度补偿法修正了声速变化带来的误差,利用声阻抗变换原理和匹配滤波的方法提高了超声波回波信号的信噪比。
Surface Acoustic Wave filter and ceramic filter are primarily used in the traditional wireless communication systems; they can not meet the needs of current communication system because of large volume or low operating frequency. 传统用于无线通信的带通滤波器以介质陶瓷滤波器和声表面波滤波器为主,他们因为体积大或工作频率低等因素已经不能满足需要。