\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{fourier}
\usepackage{pgfplots}
\pgfplotsset{compat=1.18}
\usepgfplotslibrary{polar}

\begin{document}

\begin{tikzpicture}
\begin{polaraxis}
\addplot[thick, samples=10, sharp plot, domain=0:3] (180*x, x);
\end{polaraxis}
\end{tikzpicture}

\end{document}