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Research on design and measurement of aperture antennas for millimeter-wave wireless LAN

毫米波无线局域网孔径天线设计与测量研究

基本信息

批准号：
14550384
负责人：
DEGUCHI Hiroyuki
金额：
$ 2.3万
依托单位：
Doshisha University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

项目摘要

For achieving millimeter-wave wireless LAN with high performance, new shaped-beam design procedures and multi-beam antenna techniques for horns and reflectarrays have been studied. First, in the horn antennas, in order to generate higher-order modes and obtain the aperture distribution for specified beam shape, a novel curved-taper profile and a multiple-step configuration are introduced to construct the horn taper. As design examples, a circular-aperture horn covering a circular area with high gain and a rectangular-aperture horn for elliptical area have been developed, respectively. The proposed design procedures are verified by numerical and experimental evaluation of their fabricated horns. Furthermore, to suppress sidelobe level while covering a specified area with high gain, optimum mode coefficients of such horns are determined by using quadratic programming approach. Since multimode horns can be used as a primary horn of reflector antennas, fabrication of reflector antennas and their measurements are performed in the millimeter-wave region. Second, in the reflectarray antennas, relationship between array of microstrip elements and frequency characteristics is investigated for multi-beam antenna application and broad band use. The performance of the designed reflectarray has been discussed numerically and experimentally. Besides, millimeter-wave near-field antenna measurement is studied to simply evaluate the performance of such antennas. Finally, a novel structure of waveguide filters used as a feed system of the horns and optimization design procedure for frequency selective surfaces to obtain a multi-band reflectarray has been developed.

为了实现高性能的毫米波无线局域网，研究了新的形状波束设计方法和多波束天线技术。首先，在喇叭天线中，为了产生高阶模式并获得特定波束形状下的孔径分布，采用了一种新型的弯曲锥形轮廓和多阶结构来构造喇叭锥度。作为设计实例，分别研制了覆盖圆形区域的高增益圆孔径变幅器和覆盖椭圆形区域的矩形孔径变幅器。所提出的设计方法通过对所制造的喇叭进行数值和实验评价得到了验证。此外，为了在高增益覆盖特定区域的同时抑制副瓣电平，采用二次规划方法确定了该类喇叭的最佳模态系数。由于多模角可以作为反射面天线的主角，反射面天线的制造和测量都是在毫米波区域进行的。其次，在反射天线中，研究了多波束天线和宽带应用中微带元件阵列与频率特性的关系。对所设计的反射镜的性能进行了数值和实验分析。此外，还对毫米波近场天线的测量进行了研究，对其性能进行了简单的评价。最后，提出了一种新型的波导滤波器结构，作为喇叭的馈源系统和频率选择表面的优化设计方法，以获得多波段反射射线。