acoustic filter

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。

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。

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。

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。

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

E acoustic wave pulse compression filter

声表面脉冲压缩滤波器

Evolutionary Design for Surface Acoustic Wave Filter

声表面波滤波器进化设计

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；

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

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。

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

Application of surface acoustic wave filter in television

声表面波滤波器在电视机中的应用

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。

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

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

The Filter Parameters Set Method of FIR Filter Design for Metal Crack Acoustic Emission Signal

金属裂纹声发射信号FIR滤波设计的滤波器参数设置方法

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。

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。

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。

Iterative near-field acoustic holography with k-space filter

波数域滤波迭代近场声全息

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

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