Research on Desighn Method of Antennas Used for Compact Portable Telephine

紧凑型便携式电话天线设计方法研究

• 批准号: 05650340
• 负责人: SAWAYA Kunio
• 金额: $ 1.41万
• 依托单位: Tohoku 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: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650340/
• 关键词: mobile communication; portable telephone; antenna; design method; Green's function; Method of moment; FDTD method; 携帯電話

In order to establish design methods of antennas used for the portable telephones, analyzes of the characteristics of antennas mounted on a conducting body of the portable telephone have been performed using a new method proposed by the present investigators, the Galerkin moment method and the finite diffierence time domain (FDTD) method. S-shaped antenna, which was developed by the present investigators, has been designed by the FDTD method and fabricated.1. The new method, combining the interior Green's function of the conducting box and the moment method has been applied to the analysis of the antennas mounted on the conducting box. The results show that the accuracy of the analysis is almost the same to that of the conventional Galerkin moment method, while the required CPU time is about 1% of that in the moment method. Numerical results of the characteristics of a slot antenna and a monopole antenna mounted on the conducting box have been obtained . Thus, it has been confirmed tha … More t the new method is available for the numerical design method of the portable telephone antennas. The present method has been applied to analyze the characteristics of a slot antenna on a conducting circular cylinder with finite length.2. The characteristics of typical antennas used for the portable telephone such as the monopole antenna, the planar inverted F-shaped antenna and the S-shaped antenna have been and analyzed by using the FDTD method, the validity of the FDTD method for the design method of the portable telephone has been confirmed. The effect of a dielectric layr surrounding the body of telephone and the influence of the human body have been also analyzed and discussed.3. S-shaped antenna has been numerically designed by the FDTD method and fabricated. It has been shown experimentally that the S-shaped antenna has a wide frequency band width even when the volume of the portable telephone is less than 100cm^2 and the decrease of the radiation efficiency in the presence of the human body is small. Less

为了建立便携式电话天线的设计方法，利用作者提出的一种新方法--伽辽金矩方法和时域有限差分方法，对安装在便携式电话导体体上的天线的特性进行了分析。本文研究人员自行研制的S天线，采用FDTD方法进行了设计和制作。将导电盒的内部格林函数与矩量法相结合，分析了安装在导电盒上的天线。结果表明，该方法的分析精度与传统的伽辽金矩方法基本相同，而所需的计算时间约为矩方法的1%。对安装在导电盒上的缝隙天线和单极子天线的特性进行了数值计算。因此，已经证实…该方法更适用于便携式电话天线的数值设计方法。用该方法分析了有限长导电圆柱体上缝隙天线的特性。用FDTD方法对单极子天线、平面倒F形天线和S形天线等典型便携式电话天线的特性进行了分析，验证了FDTD方法用于便携式电话设计方法的有效性。分析和讨论了电话机机身周围介质层的作用以及对人体的影响。利用FDTD方法对S天线进行了数值设计和制作。实验表明，即使在手机体积小于100 cm~2的情况下，S形天线仍具有较宽的频带宽度，而且在人体存在时辐射效率的下降很小。较少

项目成果

山口 良: "内部グリーン関数を用いた携帯電話機モノポールアンテナの入力インピーダンス解析" 電子情報通信学会秋季大会講演論文集. 2. 121-121 (1993)

Ryo Yamaguchi：“使用内部格林函数进行手机单极天线的输入阻抗分析”IEICE 秋季会议论文集。2. 121-121 (1993)。

K.Sawaya and S.Adachi: "Analysis Method of Small Antennas-Application on Portable Telephone Antennas-" Proc.XXIVth General Assembly of URSI. 35 (1993)

K.Sawaya 和 S.Adachi：“小型天线的分析方法 - 在便携式电话天线上的应用 -”Proc.XXIVth URSI 大会。

Ryo Yamaguchi: "Effect of Dimensions of Conducting Box On Radiation Pattern of a Monopoole Antenna for Portable Telephone" IEICE Trans.Communications. E76-B. 1526-1531 (1993)

Ryo Yamaguchi：“传导盒尺寸对便携式电话单极天线辐射方向图的影响”IEICE Trans.Communications。

Kunio Sawaya: "Moment Method Analysis of Antennas Located on a Conducting Box by Using Interior Green's Function" Proc.IEEE Int.AP-S Symp.3. 2258-2261 (1994)

Kunio Sawaya：“利用内部格林函数对位于导电盒上的天线进行力矩法分析”Proc.IEEE Int.AP-S Symp.3。

稲垣正史: "内部グリーン関数を用いた有限長円筒導体上のスロットアンテナの解析" 電子情報通信学会春季全国大会講演論文集. 通信1(発表予定). (1995)

Masashi Inagaki：“使用内部格林函数分析有限长度圆柱形导体上的缝隙天线”IEICE 春季全国会议通讯 1（待提交）。