菲涅尔区

菲涅尔区板天线赋形波束的最优逼近

The Optimal Approximation for the Pattern Formed with Fresnel Zone Plate Antenna

菲涅尔区相位修正平面反射器的相位效率

The Phase Efficiency of Fresnel Zone Phase Corrected Plate Reflector

用菲涅尔区板天线实现来波方向的鲁棒性估计

Robust estimation for the direction of arrival by Fresnel zone plate antenna

基于菲涅尔区修正结构的多波束自适应天线

A New Multibeam Adaptive Antenna Based on the Fresnel Zone Phase Correcting Antenna

菲涅尔区聚焦多波束天线空间谱估计性能分析

Performance analysis of spatial spectral estimation using fresnel zone focusing multi beam antenna

菲涅尔区相位修正反射面天线的频率特性

On the Frequency Characteristics of Fresnel Zone Plate Reflector

用菲涅尔区聚焦多波束天线实现来波方向估计

DOA estimation using multiple beam antenna with fresnel zone phase correcting plate focusing configuration

一维菲涅尔区相位修正平面反射器的聚焦特性研究

Research on the caustic characteristics of one dimensional Fresnel zone phase corrected plate reflector

菲涅尔区修正圆柱面天线的聚焦场特性

The characteristics of the focused fields of a cylindrical Fresnel zone phase correcting antenna

菲涅尔区修正抛物柱面反射器聚焦的极化特性

Fresnel Zone Phase Correcting Parabolic Cylindrical Reflector

菲涅尔区平面反射器的焦散区场

Caustic fields of Fresnel zone plane reflector

一维菲涅尔区相位修正结构具有类似于抛物柱面的聚焦特点。

One dimensional Fresnel zone phase correcting plate has its focusing characteristics similar to that of the paraboloid cylinder .

并从聚焦的基本概念入手，推导了均匀辐射圆口径的菲涅尔区辐射场。

From the basic concept of focusing , this paper calculates Fennel zone radiation field of uniform radiation round caliber .

在抛物柱面反射器上进行一维菲涅尔区相位修正结构设计，可以构成一类新型的点源馈电反射器。

The one dimensional Fresnel zone phase correcting principle can be applied to a cylindrical reflector to construct a new type of point source feeding reflector .

在平面上沿某一个方向进行1/P波长的相位修正，可以构成一维菲涅尔区相位修正平面。

One dimensional Fresnel zone phase corrected plate ( 1-DFP ) can be made by a 1 / P wavelength phase correcting along one dimension upon the plate .

本文首先根据菲涅尔区原理，给出了反射面主反射区的计算模型和求解公式，并结合主反射区参数和几何光学法推导出了静区范围及其中心点坐标的计算公式。

Besides , the computational formulas of quiet zone and its center coordinates are derived , on the basis of the high-reflecting region parameters and geometrical optics approach .

其优点是可以应用小尺度换能器及比较低的工作频率，来获得方位的高分辨率，可以在近场区（菲涅尔区）工作。

And its main advantage is that it can realize high resolution power of space to be used in the near area , through the application of small-scale transducer and lower performance frequency .

阐述了用聚焦法在菲涅尔区测试相控阵天线的理论依据及实现方法，用实验结果对近远场方向图进行了比较。

There are many methods to measure the pattern of phased array antenna , such as the technique of plane scanning in near field , focusing method in Fresnel zone , general method in far field , etc.

由这些结果推断，他们认为一个尺寸在15米至40米之间的在轨菲涅尔区平板将足以分辨30光年外一颗类地行星的光谱。

Extrapolating from these results , they think that an orbiting zone plate measuring somewhere between 15 metres and 40 metres across will be enough to distinguish the spectrum of an Earthlike planet at a distance of 30 light-years .

该文提出了一种将一维菲涅尔区相位修正概念应用于传统抛物柱面反射器的新型反射面天线，采用物理光学方法分析了该天线反射面对入射平面波的聚焦特性。

A new type of reflector antenna is suggested which applies the 1-D Fresnel phase correction to the classical parabolic cylindrical reflector , and the focusing characteristics this new reflector means for the incident plane wave are analysed by a physical optics method .

高斯光束经位于成像系统共轭面的两个散射体（其中一个是恒速运动）后，在距像面为菲涅尔区的观测面上形成了串级动态散斑场。

After propagating through two diffusers ( with one moving ) placed on the two conjugate planes of an imaging system , a Gaussian beam is modulated randomly to form a dynamic cascade speckle field in the Fresnel zone with respect to the image plane .