本文研究纵向振动压电换能器的频带展宽问题。
The article study widening band of longitudinal mode piezoelectric transducers.
对微带贴片天线频带展宽方面的研究做了全面、深入的探讨。
We discuss the research of the microstrip antenna in the aspect of bandwidth enhancement in detail.
对适用于水下武器导引系统的水声传感器频带展宽问题进行了讨论。
This article discusses the widening of the band of the sensor used for underwater weapon homing system.
本文主要研究了数字系统频带展宽原理及频带展宽中的三个关键技术。
In this paper, the extension theory of bandwidth in digital system and three key points of frequency band extension technology are studied experimentally by simulation.
为实现展宽频带、阻抗匹配等要求，对该移动终端天线进行了优化设计。
The antenna was optimized in order to wide bandwidth and impedance matching.
在有限长的偶极天线上，采用分布电阻加载法，实现行波电流分布，展宽天线的工作频带。
Continuous resistive loading is used to extend antenna operating band in order to realize traveling-wave current distribution on a finite length antenna.
随着孔隙率、孔径的减小，多孔铝的共振吸声系数有所下降，吸声频谱曲线向低频方向移动，且频带宽度展宽。
When the porosity and pore diameter reduced, the sound absorption curve moved to the low frequency zone and the frequency bandwidth increased at the same time.
对微带天线频带的展宽方法进行了研究，借助于时域有限差分法进行数值计算。
Microstrip antennas bandwidth enhancement method is studied, and calcutation is made for the process by using finite-different time-domain(FDTD) method.
该换能器利用前盖板的弯曲振动与换能器的纵向振动耦合展宽频带。
A broadband underwater Tonpilz transducer was designed by using the coupling of transducer's longitudinal vibration mode and the bending vibration mode of front mass to widen its frequency band.
采用空心梁结构不仅能产生应力集中而且能减少梁的自身质量带来的影响，可以有效地展宽频带。
The hollow beam construction not only produce the stress concentration, reduce the effect of beam mass but also extended the bandwidth.
首先，通过采用复合式结构展宽抑制元件频带。
First, effective frequency band of component is widened by compound structure method.
天线阵主要采用改进馈电网络的方法来展宽频带。
The method of improving the feed network is to broaden the bandwidth of the microstrip patch arrays principally.
试验结果表明，这种结构可较大地展宽传感器的工作频带。
The test results show that by this structure the working frequency bandwidth of the transducer is expanded and the dynamic measurement error reduced.
本文首先介绍了微带天线的理论分析方法和数值分析方法，并总结了微带天线小型化、多频段以及展宽频带的各种技术。
First, this article introduces some theoretical methods and numerical methods to analyze microstrip antenna and sum up some techniques for miniaturization, multi-frequency and broadening the band.
因此，欲展宽频带而保持灵敏度不变就很困难。
Therefore; to expand the frequency bandwidth and to remain the same sensitivity is difficulty.
因此，欲展宽频带而保持灵敏度不变就很困难。
Therefore; to expand the frequency bandwidth and to remain the same sensitivity is difficulty.
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