Therefore the time domain characteristics of loaded monopole antenna are calculated and analyzed using FDTD method.
采用时域有限差分法对比计算了加载与非加载单极子天线的时域辐射特性。
The time domain characteristics were studied both the UWB antennas and array proposed in this thesis with correlation factor and the pulse width stretch ratio (SR).
本文使用相关系数和脉冲宽度拉伸这两个重要的参数对超宽带天线及天线阵列进行了时域特性评估。
FDTD (Finite Difference Time Domain) method was used to numerically simulate the transient radiating and scattering characteristics of thin wire antennas.
利用FDTD(时域有限差分方法)对多根细线天线的瞬态响应特性进行了数值模拟。
According to the characteristics of ut signal, this paper puts forward two ways of digital decoding: Time Domain Analysis and Frequency Domain Analysis.
根据UT信号的特征，从时域和频域角度提出了两种数字译码方法。
Audio analysis is widely used to measure time domain, frequency domain and distortion characteristics of various audio system.
音频分析被广泛用于测量各类音频系统的时域特性、频域特性及失真特性等。
There was much contention on distributive characteristics and their production mechanism of person′s QRS complex in time and frequency domain.
在人的QRS复合波的时域频域分布特征及发生机理问题上曾有过许多争论。
The Du-conversion is one that converse the signal from time domain to gate-width domain and uses the wide spectrum density of the signal to show its characteristics.
杜氏变换是一种将信号从时域到门宽域的变换，用信号的宽谱密度来描述信号的特征。
Using the characteristics of pulse echo singal during the probe adjustment, a relation model between angle of incidence and time-domain eigenvalue of reflect wave signals was proposed.
分析了探头调整时脉冲回波信号的变化特点，在实验的基础上构建了声束入射角与表面波时域特征值间的关系模型。
Lossless nonuniform transmission lines are synthesized by the method of characteristics in the time-domain.
本文利用特征法对无耗非均匀传输线进行了综合。
In this paper, the WKB method and the finite-difference time-domain (FDTD) method are applied to study the electromagnetic characteristics of target coated with different plasmas.
本文较系统地用WKB方法和FDTD方法研究了不同等离子体覆盖导体目标的电磁特性。
They show different characteristics in time and frequency domain and share no statistical features.
它们各自在时域或频域中有互不相同的特点，没有一致的统计参数。
Based on data analysis in both time and frequency domain, characteristics of blade vibration response at rotating stall and surge condition are introduced.
在对时域和频域数据分析的基础上，论述了旋转失速和喘振状态下叶片振动响应的特征。
By the family of wavelet basis function of wavelet Composition, it can describe the signal time (space) and frequency (scale) domain of the local characteristics.
小波由一族小波基函数构成，它可以描述信号时间(空间)和频率(尺度)域的局部特性。
The time-frequency domain sampling characteristics of periodic signal, the truncation error and the spectrum leakage error caused by asynchronous sampling are discussed in detail.
讨论了周期信号取样的时域频域特性、非同步取样引起的截断误差和频谱泄漏误差。
When the incident wave is Gauss pulse, the response characteristics at ports both time and frequency domain varies with incident angles.
高斯脉冲干扰时，微带线感应电压、电流的时域和频域特性随入射角度而变化。
Waveform analyzer is one of the most important signal measuring instruments, which can accurately analyze the characteristics of the signal in time-domain and frequency-domain.
波形分析仪是最重要的信号测量仪器之一，可以对信号时域特性、频域特性以及相关特性作高精度分析。
However, the information extracted from a frequency domain signal is based on the signal frequency content, as opposed to the shape or time-varying characteristics of the waveform.
然而，从频域信号中提取出的信息是以信号频率成分而非信号形状为基础。
From the basic conception of wavelet transformation, we discuss briefly the zooming characteristics of wavelet transformation in time-frequency domain analysis in this paper.
从小波变换的基本概念出发，简要介绍了小波变换在信号时-频分析中的变焦特性。
The results provide precise measurements of the dynamics characteristics of the space deployable structure in the time-frequency domain, which are helpful for improving the system analysis and design.
实现了对航天可展结构动力学性能在时频域内的“精细”考察，将有助于提高航天器结构的分析与设计水平。
Short time Fourier transform was used to analyze the simulated signal in the time-frequency domain, a micro-Doppler image that can demonstrate the target characteristics was generated.
采用了短时傅里叶变换方法对仿真信号进行了时频分析，得到了能够较好地反映目标特征的微多普勒图像。
The main characteristics of wavelet transform is that some character can well outstanding by transformation and it is an important way to study signal in time-frequency domain.
小波变换的主要特点是通过变换能够充分突出某些方面的特征，它是研究信号时-频分析的重要方法。
In this paper, complex modal analysis for dam-foundation interaction problem in time domain is presented, and effects of dam-foundation interaction on modal characteristics of the dam are discussed.
本文提出在时域内分析水坝与地基动力相互作用问题的复模态分析方法，讨论了水坝与地基动力相互作用对水坝模态特性的影响。
The signal of instant vibration testing for soil compactness is analyzed both in time domain and frequency domain. Some feature parameters reflecting the characteristics of the signal are extracted.
从时间域和频率域两个角度对土密实度瞬态振动测试信号进行了分析，提取了信号的特征参量。
Thus, we obtained characteristics of radar images by experiments in different environment, and implemented forward modeling using two-dimension finite difference time domain method.
因此，通过不同环境的试验得到雷达图谱特征，并利用二维时域有限差分法对其进行正演模拟。
This article USES a finite difference time domain method to study the two-dimensional sound field characteristics of elastic solids based on elastic solid equations.
对弹性固体中的声场方程应用时域有限差分法，进行了二维声场特性研究。
Analyses of the leak signals both in the time domain feature parameters and the spectrum analysis is made to seek some basic characteristics of the leak signals.
从时域特征参数和频谱分析两方面对泄漏信号进行了分析，研究了泄漏信号的基本特征。
The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method.
该器件用平面波扩展法进行了分析，其传输特性用有限时域差分法计算得到。
The proposed device is analyzed using the plane wave expansion method, and its transmission characteristics are calculated using the finite-difference time-domain method.
该器件用平面波扩展法进行了分析，其传输特性用有限时域差分法计算得到。
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