NEW DIELECTRIC 1-D EBG STRUCTURE FOR THE DESIGN OF WIDEBAND RESONATOR ANTENNAS
NEW DIELECTRIC 1-D EBG STRUCTURE FOR THE DESIGN OF WIDEBAND RESONATOR ANTENNAS
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DOI：
10.2528/pier13061207
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发表时间：
2013
影响因子：
6.7
通讯作者：
Naizhi Wang;Chong Zhang;Q. Zeng;Nai‐biao Wang;Jiadong Xu
中科院分区：
文献类型：
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作者：
Naizhi Wang;Chong Zhang;Q. Zeng;Nai‐biao Wang;Jiadong Xu
本文提出了一种用一维介质板代替金属频率选择表面（FSS）来产生具有正反射相位梯度的部分反射表面（PRS）的方法。该结构由单一种类的电介质衬底实现。将其建模为级联传输线，并利用史密斯圆图从阻抗变换的角度进行分析。利用该方法设计了一个PRS，并将其应用于Ku波段的宽带EBG谐振天线的实现中，该天线由缝隙耦合贴片天线馈电。计算结果表明，该天线在14.1 ~ 17.6GHz范围内具有22%的相对3dB增益带宽，峰值增益为17 dBi。反射系数（S11）小于10 dB时的阻抗带宽为14 ~ 17.7GHz，覆盖了3dB增益带宽。制作了样机并进行了测试，实验结果验证了仿真结果.本文提出的设计方法是有效的，并可方便地用于其它频率的天线设计。
In this paper, we propose a method to use 1-D dielectric slabs, instead of metallic Frequency Selective Surfaces (FSSs), to produce Partially Re∞ective Surfaces (PRSs) with positive re∞ection phase gradients. The structure is realized by a single kind of dielectric substrate. It is modeled as cascaded transmission lines and then analyzed by virtue of the Smith Chart from the perspective of impedance transformation. A PRS designed by this approach is then applied to the realization of a wideband EBG resonator antenna operating at Ku band which is fed by a slot-coupled patch antenna. The calculated results indicate that the antenna possesses a relative 3dB gain bandwidth of 22%, from 14.1GHz to 17.6GHz, with a peak gain of 17dBi. The impedance bandwidth for the re∞ection coe-cient (S11) less than i10dB, is from 14GHz to 17.7GHz, well covering the 3dB gain bandwidth. A prototype has been fabricated and measured, and the experimental results well validate the simulation. The design method developed here is signiflcantly efiective, and can be easily adopted for antenna designs at other frequencies.