英语翻译The electric field patterns of a square patch antennawer

英语翻译
The electric field patterns of a square patch antenna
were shown in Fig.2.The patterns were considered to
be constant along W and varied sinusoidal with L.A
design of the broadband dual-polarized microstrip
antennas is proposed by using the inset feed technique.
In most applications,the requirement of
propagation can be met with a single patch structure.
However,in some cases,sharp beamwidth was
required,as well as maintaining a low profile structure,
which arise the development of microstrip patch array
antennas.The microstrip patch array antennas offers
three excellent advantages relative to other types of
antennas [5]-[7]; low weight,low profile with
conformability and low manufacturing cost.
Several common patterns of microstrip patch
array antennas are series,parallel or corporate and
hybrid series/parallel feeds [8].Both design of array
antennas in this paper were connected using parallel
feed quarter-wave transformer impedance matching
technique.
2.Design Procedure
A prototype antenna is then designed,and
experimental results are presented.There were several
ways to design microstrip antennas such as
transmission line,cavity and full wave models [19].
For simplicity purpose,transmission line model was
used in this project.
Dimensions of the antenna are depending on the
operating frequency and dielectric constant of the
substrate [20].The parametric study on the single
patch antenna is done first to understand the
characteristics of the antenna.Fig.3 showed the
dimension of the 45º patch antenna was simulated
using Microwave Office 2006.Fig.4 has shown the
dimension of -45 single patch antennas.The length,

图2所示为一只方片天线的电场图.认为该图沿着W向不变,随着L向正弦变化.本文提出了一种用嵌入馈电技术设计的宽带双极化微带天线.在大多数应用中,单片结构天线可以满足传播的需求.然而,在某些情况下,需要窄束宽和外形轮廓结构很小时,需要发展微带片式阵列天线.相对于其他类型的天线,微带贴片阵列天线有三个优点[5] - [7],重量轻,姿态舒适不引人注目,制造成本低.微带贴片阵列天线的几种常见的模式是串联,并联或串/并馈电共同混合使用[8].本文提出了用并行馈电方波1/4波长变压器阻抗匹配技术连接的这两种天线阵列的设计.
2.设计步骤
本文发布了天线原型机的设计和实验结果.有几种方法来设计微带天线,例如传输线,腔和全波模型[19].为简化设计,本项目用的是传输线模型.天线的尺寸取决于工作频率和基片的介电常数[20].为了理解天线的特性,首先要做单片天线的参数研究.图3所示为用Microwave Office 2006模拟的45o 单片式天线的尺寸.图4所示为-45o 单片式天线的尺寸.
长度