Directional coupler for circuitikz

directionalcoupler.tex

\documentclass [tikz,border=10pt]{standalone}
\usepackage{circuitikz}

\begin{document}

\newcommand{\dircoupler}[2]{ % #1 = name of object, #2 = rotation angle
    \draw[thick,rotate=#2] (#1.nw) -- (#1.ne) -- (#1.se) -- (#1.sw) -- cycle;
    \draw[thick,rotate=#2] (#1.n) -- ++(.3,0) -- ++(0,-0.3);
    \draw[thick,rotate=#2] (#1.e) -- (#1.w);
}

\begin{circuitikz}
    \draw
    (0,0) to[lamp,color=white,n=DIR,-*] (0,2)  % The coupler using a lamp as a template object
    (DIR.n) -- ++(-1,0)
    ;
    \dircoupler{DIR}{0}
\end{circuitikz}

\end{document}

Preview of the coupler when rendered