\setlength\extrarowheight{3pt}
\setlength{\tabcolsep}{4pt}
\noindent
\begin{tabularx}{\textwidth}{|C||C||C|}
\hline
\multicolumn{3}{|c|}{Table 1: State of The ART Schemes With Intelligent Surfaces}\\
\hline\hline
Scheme & Architecture & Functionality \\
\hline
Intelligent wall & Active frequency selective surfaces with PIN diodes & Fully transparent reflecting surfaces\\
Spatial microwave modulators & Binary phase state tunable meta-surfaces & Shaping complex microwave fields\\
Coding meta-materials & Meta-surfaces with binary elements (0 or $\pi$ phases) & Reconfigurable scattering patterns\\
Programmable meta-surface & Meta-surfaces with PIN diode-equipped cells & Reconfigurable phase, polarization, and scattering\\
Reconfigurable reflect-arrays & Reflect-arrays with tunable (varactor-tuned) resonators & Adjustable reflection phase\\
Large intelligent surface & Active contiguous surface for transmission and reception & Gains compared to massive MIMO \\
Software-controlled hypersurface & Meta-surfaces equipped with IoT gateways & Wave absorption, polarization, and steering\\
\hline
\end{tabularx}
答案1
(表格\caption
的)应该位于环境内table
。
该包caption
有助于设置标题的格式,但不需要使用命令\caption
。
\documentclass[12pt,a4paper]{article}
\usepackage{array}
\usepackage{tabularx}
\usepackage{caption} % added
\newcolumntype{C}{>{\centering\arraybackslash}X}
\begin{document}
\noindent
\begin{table}% added <<<<<<<<<
\setlength\extrarowheight{3pt}
\setlength{\tabcolsep}{4pt}
\caption{State of The ART Schemes With Intelligent Surfaces}
\begin{tabularx}{\textwidth}{|C||C||C|}
% \hline
% \multicolumn{3}{|c|}{Table 1: State of The ART Schemes With Intelligent Surfaces}\\
% \hline
\hline
Scheme & Architecture & Functionality \\
\hline
Intelligent wall & Active frequency selective surfaces with PIN diodes & Fully transparent reflecting surfaces\\
Spatial microwave modulators & Binary phase state tunable meta-surfaces & Shaping complex microwave fields\\
Coding meta-materials & Meta-surfaces with binary elements (0 or $\pi$ phases) & Reconfigurable scattering patterns\\
Programmable meta-surface & Meta-surfaces with PIN diode-equipped cells & Reconfigurable phase, polarization, and scattering\\
Reconfigurable reflect-arrays & Reflect-arrays with tunable (varactor-tuned) resonators & Adjustable reflection phase\\
Large intelligent surface & Active contiguous surface for transmission and reception & Gains compared to massive MIMO \\
Software-controlled hypersurface & Meta-surfaces equipped with IoT gateways & Wave absorption, polarization, and steering\\
\hline
\end{tabularx}
\end{table}
\end{document}