A Miniaturized Multiband FSS Director Using Double Layer With ICPW Technique Structure for Wireless Communication Systems
A Miniaturized Multiband FSS Director Using Double Layer With ICPW Technique Structure for Wireless Communication Systems
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DOI：
10.1109/access.2023.3300651
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发表时间：
2023
期刊：
影响因子：
3.9
通讯作者：
P. Chomtong;N. Somjit;P. Krachodnok;C. Mahatthanajatuphat;S. Tawatchai;P. Akkaraekthalin
中科院分区：
文献类型：
--
作者：
P. Chomtong;N. Somjit;P. Krachodnok;C. Mahatthanajatuphat;S. Tawatchai;P. Akkaraekthalin
本文提出了一种基于频率选择表面(FSS)单元结构的多频段导向器，该导向器采用交叉指共面(ICPW)技术的双层结构。单元格由正面和背面组成。前端采用了基于共面波导结构的ICPW技术，以提高传输线和半地线之间的电容。由于慢波效应对结构电容的影响，可以将单元的总体结构尺寸设计得比传统的$\lambda$/2到$\lambda$/8范围小。背面是正面的倒置层，它在衬底和铜之间交替。它由一个带双曲折线的方形环谐振器组成。双曲线产生的电容增强了前端的电容，影响了对所有谐振频率的控制，并增加了双层单胞结构上的慢波，导致尺寸显著减小。设计的谐振频率分别为1.8 GHz(LTE)、3.7 GHz(Wi-Max)和5.2 GHz(WLAN)。根据仿真结果，FSS可以传输所有的谐振频率。它的总尺寸为10.93 mm$\x 11.48$mm。此外，FSS单元格被安排成$7×7$阵列以用作导向器。尺寸为73.48 mm$\x 77.38$mm。FSS导向器将使用与FSS单元单元相同的谐振频率的全向偶极天线进行评估。根据仿真和测量结果，在三个谐振频率下，阻抗匹配值均小于-10分贝。配备偶极天线的FSS导向器在所有谐振频率上都表现出双向传播特性。模拟天线增益为3.45dBI、3.05dBI和3.72dBI，测量天线增益为3.05dBI、2.98dBI和3.12dBI。调查结果表明，双方的观点高度一致。
This paper presents a multiband director based on the frequency selective surface (FSS) unit cell structure using the double layer with interdigital CPW (ICPW) technique. The unit cell consists of the front and the back. The front part has been designed using an ICPW technique based on a coplanar waveguide structure to enhance the capacitance between the transmission line and the semi-ground. The overall structural dimension of the unit cell can be designed to be smaller than the conventional range of $\lambda $ /2 to $\lambda $ /8, due to the influence of the slow wave effect on the capacitance of the structure. The back part is the inverted layer of the front, which alternates between substrate and copper. It is composed of a square loop resonator with a double meandering line. The capacitance generated by a double meander line enhances the capacitance in the front part, which influences the control of all resonant frequencies and increases the slow wave on the double-layer unit cell structure, resulting in a significantly reduced dimension. The resonance frequencies for the designs are 1.8 GHz (LTE), 3.7 GHz (Wi-MAX) and 5.2 GHz (WLAN), respectively. According to simulation results, the FSS can transmit all resonant frequencies. It has an overall dimension of 10.93 mm $\times11.48$ mm. In addition, the FSS unit cell has been arranged as a $7\times 7$ array for use as a director. The dimensions are 73.48 mm $\times77.38$ mm. The FSS director will be evaluated utilizing an omnidirectional dipole antenna at the same resonant frequency as the FSS unit cell. According to both the simulated and measured outcomes, the impedance matching value is below -10 dB at the three resonant frequencies. The FSS director equipped with a dipole antenna exhibits bidirectional propagation characteristics across all resonant frequencies. The antenna gains for simulation are 3.45 dBi, 3.05 dBi, and 3.72 dBi, while the antenna gains for measurement are 3.05 dBi, 2.98 dBi, and 3.12 dBi. The findings indicate a high level of concurrence.