For exercise:
\documentclass[border=3.141592]{standalone}
\usepackage{siunitx}
\usepackage[american]{circuitikz}
\usetikzlibrary{decorations.pathreplacing,
calligraphy}
\tikzset{BC/.style args = {#1/#2}{decorate,
decoration={calligraphic brace, amplitude=2mm,
pre =moveto, pre length=2mm,
post=moveto, post length=2mm,
raise=#1,
#2},% for mirroring of brace
thick,
pen colour=red}
}
\ctikzset{bipoles/capacitor/height=0.5,
bipoles/capacitor/width=0.1,
}
\begin{document}
\begin{circuitikz}
\draw (0,3) to[V, a=$V_s$] (0,0) coordinate (aux0)
(0,3) to[R=$\SI{4.5}{\ohm}$] ++ (2,0)
to[L=$j\SI{1.5}{\ohm}$] ++ (2,0) coordinate (aux1)
to[R=$\SI{25}{\ohm}$,*-*] ++ (0,-3)
(aux1) -- ++ (1.5,0) coordinate (aux2)
to[L=$j\SI{20}{\ohm}$,*-*] ++ (0,-3)
(aux2) to[short,-o] ++ (2, 0) coordinate[label=$a$] (aux3)
to[open, v=$V_o$] ++ (0,-3) node[below] {$b$}
to[short,o-] (aux0);
\draw[densely dashed]
(aux3) to [short,o-] ++ (1,0)
to[C=$-j\SI{5}{\ohm}$] ++ (0,-3)
to [short,-o] (aux0 -| aux3);
\draw[BC=3mm/mirror]
(0,3) -- node[below=5mm] {$Z_1$} (aux1);
\draw[BC=1mm/mirror]
([xshift=-4mm] aux0 -| aux1) -- node[below=3mm] {$Z_2$} ([xshift=4mm] aux0 -| aux2);
\end{circuitikz}
\end{document}
Addendum:
In the case, that you like to have cute inductance
and solid capacitor's bars, then by considering of @Rmano comment below (@Rmano thank you very much for your help), the MWE can be:
\documentclass[border=3.141592]{standalone}
\usepackage{siunitx}
\usepackage[american, cute inductors]{circuitikz} % <---
\usetikzlibrary{decorations.pathreplacing,
calligraphy}
\tikzset{BC/.style args = {#1/#2}{decorate,
decoration={calligraphic brace, amplitude=2mm,
pre =moveto, pre length=2mm,
post=moveto, post length=2mm,
raise=#1,
#2},% for mirroring of brace
thick,
pen colour=red},
}
\ctikzset{bipoles/capacitor/height=0.5,
bipoles/capacitor/width=0.1,
}
\begin{document}
\begin{circuitikz}
\draw (0,3) to[V, a=$V_s$] (0,0) coordinate (aux0)
(0,3) to[R=$\SI{4.5}{\ohm}$] ++ (2,0)
to[L=$j\SI{1.5}{\ohm}$] ++ (2,0) coordinate (aux1)
to[R=$\SI{25}{\ohm}$,*-*] ++ (0,-3)
(aux1) -- ++ (1.5,0) coordinate (aux2)
to[L=$j\SI{20}{\ohm}$,*-*] ++ (0,-3)
(aux2) to[short,-o] ++ (2, 0) coordinate[label=$a$] (aux3)
to[open, v=$V_o$] ++ (0,-3) node[below] {$b$}
to[short,o-] (aux0);
% capacitor as capacitorshape node with dashed connections
\path (aux3) -- node (c) [right=10mm,
capacitorshape, fill=white, solid, rotate=90,
label=below:$-j\SI{5}{\ohm}$] {} (aux0 -| aux3);
\draw[densely dashed]
(aux3) to [short,o-] ++ (1,0) to (c.right)
(c.left)to (aux0 -| c) to [short,-o] (aux0 -| aux3);
%
\draw[BC=3mm/mirror]
(0,3) -- node[below=5mm] {$Z_1$} (aux1);
\draw[BC=1mm/mirror]
([xshift=-4mm] aux0 -| aux1) -- node[below=3mm] {$Z_2$} ([xshift=4mm] aux0 -| aux2);
\end{circuitikz}
\end{document}
Z_2
is confusing, you are referring to the impedance of the line segment or the impedance of the two parallel components? In my understanding,Z_2
is zero ohm because we assume the line segment is a pure conductor. Hmm...