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Design method of low-profile and small antenna for mobile communication.

移动通信低剖面小型天线设计方法

基本信息

批准号：
01550301
负责人：
HANEISHI Misao
金额：
$ 1.15万
依托单位：
Saitama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550301/
关键词：
Planar antenna Small antenna Printed antenna Broadband Stack Shorted-plane Pattern Efficiency

项目摘要

A low-profile and small antenna consisting of microstrip patch (MSA) or other printed antenna are widely used as an efficient radiator in mobile communication systems.This report presents the designing techniques of low-profile and small antenna for mobile system.The test antennas were made of a copper-clad 0.6 mm-thick low-loss Teflon fiber-glass substrate with a dielectric constant of 2.55 and loss tangent of 0.0018. The important items of this investigation are mentioned briefly as follows.1. In miniaturization of an antenna, it is important to estimate unloaded Q(Q_0), radiation efficiency eta and frequency bandwidth BW.The values of eta and BW for shorted-MSA are calculated for a typical substrate ( Teflon fiber-glass substrate ) as a function of substrate thickness ( h/lambda_0 : lambda_0 : free space wave-length ). On measuring the values of eta and BW, all the measured values agreed well with the calculated ones within desirable ranges for designing.The measured patterns of the antenna agreed also well with the computed results.2. In order to estimate the performance of this low-profile and small antenna, some test samples were constructed and tested at the microwave-region. As expected, the experimental pattern and ellipticity of the antenna agreed well with the theoretical ones.These results indicate that the low-profile and small antenna is applicable as an element antenna for mobile telecommunication system.3. Finally, the low-profile planar array was made by integrating large numbers of these small antennas. The experimental pattern of the test planar array agreed well with the theoretical one. The antenna presented here is, therefore, considered to be effectively applicable as a low-profile and small antennas for mobile system.

由微带贴片或其他印刷天线组成的小型化天线在移动通信系统中作为一种高效的辐射体得到了广泛的应用。本文介绍了一种用于移动通信系统的小型化小型化天线的设计技术。测试天线采用了介电常数为2.55、损耗正切为0.0018的低损耗聚四氟乙烯基板。现简要介绍本次调查的重要事项如下1.在天线小型化中，估算空载Q(Q0)、辐射效率ETA和频带带宽BW是很重要的。对于典型的基板(特氟龙玻璃纤维基板)，计算了短路MSA的ETA和BW值作为基板厚度(h/lambda_0：Lambda_0：自由空间波长)的函数。对天线的ETA和BW值进行了测量，在设计要求的范围内，所有测量值都与计算值吻合良好，天线方向图的测量结果也与计算结果吻合较好。为了评估这种低调小型化天线的性能，构建了一些测试样本，并在微波区进行了测试。如预期的那样，该天线的实验方向图和椭圆度与理论值吻合较好，这些结果表明该天线可以作为移动通信系统的单元天线。最后，将大量的这些小天线组合在一起，形成了低剖面的平面阵列。测试平面阵的实验方向图与理论方向图吻合较好。因此，本文提出的天线被认为是一种有效适用于移动系统的小型化低轮廓天线。