1) tapered IDT
锥形叉指换能器
1.
The basic properties of SAW tapered IDT is presented.
介绍声表面波锥形叉指换能器的基本原理,采用折线电极锥形叉指换能器制作的TD-SCDMA制式用96MHz宽带滤波器,1dB带宽4。
2) interdigital transducer
叉指换能器
1.
New Equivalent Circuit Model of Interdigital Transducer and Its PSPICE Simulation;
叉指换能器新的等效电路模型及其PSPICE仿真
2.
To solve these problems, the properties of Lamb wave excited by interdigital transducer in the piezoelectric substrate covered by liquid were studied based on its piezoelectricity and anisotropy.
在考虑晶体的压电性和各向异性基础上 ,从声的波动理论出发 ,对叉指换能器在液体 -压电晶片界面上兰姆波的激发理论及其性质进行了研究 。
3.
There is the excitation of bulk acoustic waves inside the substrate besides the excitation of surface acoustic waves along the substrate surface when interdigital transducer is powered by the electrical signal with one frequency.
文章对叉指换能器在不同切型基片内激励声体波的角谱（能量分布）进行了研究，所得结果在研制声学传感器、声表面波器件时具有重要意义。
3) IDT
叉指换能器
1.
The Making Technology of IDT;
声表面波器件叉指换能器的制作技术
2.
When SAW is excited by the IDTs on the substrate,and BAW is excited as well Based on this principle,experiments to suppress BAW have been done by grooving on the back of the substrates such as ST,LT,LN with the filter center frequency of 28 MHz,70 MHz,71 MHz,120 MHz respectively The BAW suppression is observed and the experimental results are also given in this pape
当叉指换能器在基片上激励声表面波模式时 ,同时伴随着体声波的激励。
3.
The design and fabrication of acoustical waveguide and interdigital transducer (IDT) in the quasi-collinear acousto-optic tunable filter (AOTF) was investigated experimentally by using SiO2/In2O3 film on LiNbO3 substrate.
以LiNbO3晶体为基底,SiO2/In2O3为镀膜材料,设计并制作了用于准共线型声光可调谐滤波器(AOTF)的声波导及其叉指换能器(IDT),研究了制作工艺,实验测量了该声波导的传输性能。
4) Interdigital transducers
叉指换能器
1.
A method to simulate surface acoustic wave device(SAWD) is proposed,in which impedances of Mason equivalent circuits are equaled by LC networks called as subcircuit,and piezoelectric material between input and output interdigital transducers are equaled by non-loss transmission line with the same delay time.
提出了采用PSPICE仿真声表面波器件的方法,它将叉指换能器一个周期段Mason等效电路复阻抗采用LC串并联网络等效,并以子电路形式由叉指换能器等效电路调用,两换能器间声传播路径采用等延迟时间的无损耗传输线等效,同时考虑外电路影响,仿真得到的异型声表面波器件的幅度特性与实测结果基本相符。
2.
The excitation of bulk acoustic waves(BAWs) by interdigital transducers(IDTs)is thoroughly studied in the structure consisting of piezoelectric crystal solid layer liquid.
对压电晶体 -固体 (层 ) -液体结构中叉指换能器的体声波激励效应进行了深入探讨 ,通过引入压电晶体-固体层界面的界面有效介电常数 ,研究了叉指换能器的体声波激励效应与晶体切向、电边界条件及固体层归一化厚度之间的关系。
5) interdigital transducer(IDT)
叉指换能器
1.
The P matrix of IDT whose electric ports both connected in serial is difficultly joined when we analysis interdigital transducer(IDT).
通过巧妙的矩阵变换,避开了复杂的公式推导,成功解决了电学端口串联叉指换能器中级联的P矩阵合成问题。
2.
If the substrate of largerelectromechanical coupling coefficient(suchas YZ-LiNbO3substrate)is used forwavelettype ofinterdigital transducer(IDT),its frequency characteristic curve is notsmooth,butits in-sertion loss is smaller.
小波式叉指换能器使用机电耦合系数比较大的基片(如YZ-L iNbO3基片)时,其频率特性曲线不光滑,但插入损耗小;小波式叉指换能器使用机电耦合系数比较小的基片(如X 112°Y-L iTaO3基片)时,其频率特性曲线光滑,但插入损耗大。
6) apodised transducers
变迹叉指换能器
1.
A new design approach for apodised transducers is adopted.
为简化变迹叉指换能器设计过程,提出了一种新的变迹叉指换能器的设计方法,它以叉指换能器的中心频率处的插入损耗和旁瓣电平作为寻优目标,叉指换能器的指条长度作为基因,通过选择、交叉和变异等遗传操作,自动生成叉指换能器的所有指条长度,并给出进化得到的变迹叉指换能器的频率响应。
补充资料：电声换能器
| 电声换能器 electroacoustic transducer 将电（声）信号能量转换成相应的声（电）信号能量的器件。一般电声换能器的能量转换过程是 ：对于电-声转换是先将电信号转换成机械振动，然后由机械振动产生声波；对于声-电转换 ，则是先将声信号转换成机械振动后再转换成电信号。电机械换能器按转换机理可分为 5种：电动换能器、电磁换能器、静电换能器、压电换能器、磁致伸缩换能器等。它们的能量转换是可逆的。还有一类换能器的能量转换是不可逆的，其中应用最多的是变阻换能器，如电话机中的炭粒送话器。常用的电声换能器有：送话器和受话器，大量应用在电话机中；扬声器，主要用在可听声频范围内，将电信号转换成声信号；传声器，在可听声频范围内将声信号转换成电信号；超声换能器，用于超声波范围的电声换能器，主要是压电陶瓷换能器；水声换能器，又称水听器，接收水声信号并将其转换成电信号。近代新出现的激光换能器和光导纤维换能器是应用光干涉仪的原理或光强度调制的方法制成的。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条