三频小型圆极化微带天线的研究
关键词：多频带，小型化，圆极化，轴比，增益，微带天线
Abstract
In recent years, with the development of larger capacity, multi-functions and
intelligence communication systems, antenna as an indispensability part of
communication systems is having the tendency to be multi-frequency and
miniaturization.This dissertation mainly researches the multi-frequency and
miniaturized microstrip antennas. Three multi-frequency and miniaturized
microstrip antennas are proposed. Many technologies of them are discussed in theory,
simulation and experiment. the main research work is pided into two parts:
Firstly, this article explains the basic theory for the microstrip antenna, the idea
of a microstrip patch antenna analysis methods, design principles and electrical
parameters. Then, the circular polarization of the antenna miniaturization,
multi-frequency technology theory are outlined.
Secondly, on the basis of the theory of the circular polarization of the antenna,
miniaturization, multi-frequency technology , Designing a laminated three-band
circularly polarized antenna. The proposed antenna can operate at B3，L band and S
band simultaneously, the antenna size is 44mm * 44mm * 15mm, the superposition of
the use of three-layer dielectric slab, the following two layers is to use a single fed
truncated corners to the formation of circular polarization, the top layer will use the
U-shaped slot to improve the bandwidth. By using the 3D electromagnetic field
simulation software HFSS13.0 simulation ,we make a study of the difference of
antenna’s properties such as antenna gain, pattern, standing wave, axis ratio and so on.
Key word:, Multi-band, miniaturization , circular polarization, axial ratio,
gain, microstrip antennas
目录
摘 要. I
1绪论 1
1.1引言 . 1
1.2微带天线的概述 . 2
2微带天线基本理论 3
2.1微带天线的辐射机理 . 3
2.2微带天线的分析方法 . 5
2.2.1 传输线法 . 5
2.2.2 空腔模型 . 6
2.2.3 多端口网络模型 . 6
2.2.4 积分方程法——全波分析法 . 6
2.3 微带贴片天线设计原则及计算公式 9
2.3.1 介质的选择 . 9
2.3.2 线极化微带贴片天线设计步骤 . 10
2.4微带天线的基本电参数 . 11
2.4.1概述 11