Inverted-F antenna with parasitic elements for TETRA handset

Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324) Pub Date : 1999-09-19 DOI:10.1109/VETECF.1999.801731

J. de Mingo, A. Valdovinos, F. Gutiérrez, J. M. González

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引用次数: 6

Abstract

The paper presents the VSWR (voltage standing wave ratio) performance and radiation pattern for a low-profile IFA (inverted-F antenna) matched at 450 MHz. It is known that when the IFA height from a conducting ground plane is approximately one-tenth of the wavelength, the frequency bandwidth for a VSWR=2 criterion is approximately 8%. Nakano et al. (1998) proposed two L-figured parasitic elements added to the IFA to widen the VSWR bandwidth. It should be a large value for handset systems if this criterion is applied to structures working at lower frequencies (450 MHz) such as TETRA. A design of IFA is presented with different lengths for parasitic elements to generate two resonance frequencies near the central frequency of design. Antenna characteristics; mounted on the handset, are calculated using the method of moments (MoM) with wire grid models using numerical electromagnetic code NEC2. The mean effective gain (MEG) for different statistical distribution models of incident waves are presented too.

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TETRA手机用带寄生元件的倒f天线

本文介绍了450mhz匹配的低轮廓反f天线的电压驻波比性能和辐射方向图。众所周知，当离导电地平面的IFA高度约为波长的十分之一时，VSWR=2判据的频率带宽约为8%。Nakano等人(1998)提出在IFA中添加两个l形寄生元件以扩大VSWR带宽。如果这一标准应用于工作在较低频率(450兆赫)的结构，如TETRA，那么对于手机系统来说，它应该是一个很大的值。提出了一种采用不同长度的寄生元件在设计的中心频率附近产生两个共振频率的IFA设计方案。天线的特点;安装在手机上，使用矩量法(MoM)与线网格模型使用数值电磁代码NEC2计算。给出了不同入射波统计分布模型下的平均有效增益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Gateway to 21st Century Communications Village. VTC 1999-Fall. IEEE VTS 50th Vehicular Technology Conference (Cat. No.99CH36324)

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