Design of BFN with Application of 2D-DFT to 1D-DFT Equivalent Transformation Theory

应用2D-DFT到1D-DFT等效变换理论设计BFN

基本信息

批准号：
09450153
负责人：
INAGAKI Naoki
金额：
$ 3.84万
依托单位：
Nagoya Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09450153/
关键词：
1D-DFT 2D-DFT Sampling Multiple Beam Array BFN Shelton's Method Diversity Antenna Microstrip Antenna 1D-DFT 2D-DFT 標本化定理ダイバーシチアンテナマイクロストリップアンテナ

项目摘要

Following theoretical results have been obtained concerning mainly the equivalent transform theory from 2D-DFT to 1D-DFT with the new concept of simultaneous sampling.1.2D-DFT to 1D-DFT transformation theory has been applied to synthesize a BFN (beam forming network) of multiple beam array antennas.2. Mathematical basis has been given to Shelton's method of feeding planar multiple beam array antennas by a BFN for linear multiple beam array antennas.3. The traditional design of BFN based on experience has been given a theoretical support.4. The mutual coupling effects between elements have been clarified by the ICT theory when the designed array antenna have been used as adaptive array antennas.5. A cylindrical antenna as the elements has been numerically analyzed with a realistic modeling, and the usefulness has been demonstrated.6. BFNs with Light wave device have been proposed, which are designed by geometrical optics and are frequency independent. It has been shown that our theory can be applied to the design this kind of BFN.Following results have been obtained experimentally.1. From indoor experiments for manufactured array antennas used as a directive diversity antenna, the improve- ment factor of BER characteristics by diversity reception has been known.2. Microstrip antennas are small size, conformal, light weight, and are promising to be used as portable antennas, but are frequency sensitive in nature. The new type of log periodic microstrip antennas have been developed whose bandwidth have been increased by a factor of several tens.

基于同时采样的新概念，主要涉及从2D-DFT到1D-DFT的等效变换理论，获得了以下理论结果。 1.2D-DFT到1D-DFT变换理论已被应用于合成BFN（波束形成网络）多波束阵列天线2．为线性多波束阵列天线的BFN馈电平面多波束阵列天线的Shelton方法提供了数学基础。 3．传统的基于经验的BFN设计得到了理论支持。 4．利用ICT理论阐明了所设计的阵列天线作为自适应阵列天线时阵元之间的互耦合效应。 5．以圆柱天线为单元，进行了数值分析和真实建模，验证了其实用性。 6．已经提出了带有光波器件的BFN，它是通过几何光学设计的并且与频率无关。实验结果表明，我们的理论可以应用于此类BFN的设计。实验得到了以下结果： 1．从用作定向分集天线的制造阵列天线的室内实验中，已经知道分集接收对 BER 特性的改善因素。 2．微带天线尺寸小、共形、重量轻，有望用作便携式天线，但本质上对频率敏感。研制出新型对数周期微带天线，其带宽增加了数十倍。