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"A study on design method of planar antenna having ultra broad-band characteristics"

《具有超宽带特性的平面天线设计方法研究》

基本信息

批准号：
08650401
负责人：
HANEISHI Misao
金额：
$ 1.41万
依托单位：
Saitama University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08650401/
关键词：
antenna planar antenna ultra broad-band taper slot antenna triplate-line microstrip antenna array antenna 平面アンネナ

项目摘要

A triplate-type tapered slot antenna (T-TSA) presented here has low cross-polarization characteristics, since the T-TSA element is fed by a center conductor of the shielded triplate line to suppress the influence of an unwanted radiation. This type of a T-TSA,element is printed on both sides of a dielectric substrate and its feeding system consists of a triplate line. Test samples of the antenna were made of Teflon fiberglass substrates (epsilon _r=2.6, tan delta=0.0018, h=0.6mm). The radiation patterns on both E-and H-plane of the T-TSA element at X-band revealed high performances. The cross-polarization level of the T-TSA was suppressed to below-30dB at the boresight direction.The gain of the T-TSA element was higher than 6.8 dBi from 8 GHz to 12 GHz, with a peak level at 9.0 dBi. In the design of an array, it is important to estimate the mutual coupling between the T-TSA elements. As a result of experiment, the H-plane mutual coupling of this type of array was below-20 dB and that of the E-plane was about-15 dB when the element spacing d was 0.5lambda_o. The 4*4 element array was composed of these T-TSA elements. The experimental results of this array demonstrated high performance in both radiation pattern and gain characteristic. Therefor, the T-TSA is considered to be a promising element in an array antenna. Moreover, a wide band dual-polarized array antenna composed of T-TSA elements was also constructed and tested at X-band. An excellent isolation characteristic was achieved at both ports of the dual-polarized array.

这里提出的三板型锥形缝隙天线（T-TSA）具有低交叉极化特性，因为T-TSA元件由屏蔽三板线的中心导体馈电以抑制不需要的辐射的影响。这种类型的T-TSA元件印刷在介质基板的两面上，其馈电系统由三板线组成。水循环微波消融针的测试样品由Teflon玻璃纤维衬底制成（λ_r=2.6，tan δ =0.0018，h=0.6mm）。T-TSA元件在X波段E面和H面的辐射方向图显示出很高的性能。T-TSA器件的交叉极化电平在低频方向被抑制到-30dB以下，增益在8 ~ 12 GHz范围内大于6.8dBi，峰值为9.0dBi。在天线阵设计中，估计T-TSA阵元间的互耦是一个重要的问题。实验结果表明，当阵元间距d为0.5 μ da_0时，H面互耦小于-20dB，E面互耦约为-15dB。4*4元件阵列由这些T-TSA元件组成。实验结果表明，该阵列在辐射方向图和增益特性方面都具有良好的性能。因此，T-TSA被认为是阵列天线中有前途的单元。此外，还研制了一种由T-TSA单元组成的宽带双极化阵列天线，并在X波段进行了测试。双极化天线阵的两个端口都具有良好的隔离特性。