From a25619a07a379f115eaa2d3dc7702ff05a8595ef Mon Sep 17 00:00:00 2001
From: jaseg <git@jaseg.de>
Date: Tue, 5 Nov 2024 19:45:32 +0100
Subject: [PATCH] Related work WIP

---
 paper/paper.tex | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/paper/paper.tex b/paper/paper.tex
index 5dce2e6..41f2ad9 100644
--- a/paper/paper.tex
+++ b/paper/paper.tex
@@ -144,7 +144,7 @@ are used in multilayer PCBs.
 \end{figure}
 
 This lack of a way to wind high frequency inductors with a machine led to the creation of a number of related winding
-schemes that including honeycomb and basket woven coil
+schemes that include honeycomb and basket woven coils
 \cite{eppenAnforderungenEinzelteileRundfunkempfanger1927,
 filbigLehrbuchHochfrequenztechnik1942,
 kleinSpulenUndSchwingungskreise1941,
@@ -152,12 +152,18 @@ meinkeTaschenbuchHochfrequenztechnik1956,
 nottebrockSpulen1950,
 struttVerstarkerUndEmpfanger1951,
 wiggeRundfunktechnischesHandbuch1930,
-zicknerSpulen1927}.
-Examples of both from contemporary literature are shown in Figure\ \ref{fig_illust_honeycomb_basket}. In a honeycomb
-coil, subsequent winding layers are wound at a criss-cross pattern similar to how in sewing, a spool of thread is wound.
-The characteristic feature of honeycomb coils is that the winding machine is adjusted to produce large air gaps between
-adjacent windings on the same layer. When multiple layers like this are stacked, a rhomboid pattern results that is
-vaguely reminiscent of a honeycomb's structure.
+zicknerSpulen1927}. The simplest such winding technique is the universal winding as described in depth by
+\textcite{querfurthCoilWindingDescription1954}. In a simple, cylindrical wire-wound inductor, the windings are laid down
+one right next to the other, until the end of the winding area is met, where the winding direction is reversed. One
+layer of such windings forms a helix whose pitch is equal to the wire diameter. A universal winding uses the same
+helical scheme reversing at the coil ends, but uses a helical pitch larger than the wire diameter to form a structure
+similar to a spool of sewing thread.
+
+Examples of honeycomb and basket woven coils from contemporary literature are shown in Figure\
+\ref{fig_illust_honeycomb_basket}. In a honeycomb coil, like in an universal winding subsequent winding layers are wound
+at a criss-cross pattern. The characteristic feature of honeycomb coils is that the winding machine is adjusted to
+produce large air gaps between adjacent windings on the same layer. When multiple layers like this are stacked, a
+rhomboid pattern results that is vaguely reminiscent of a honeycomb's structure.
 
 In basket-woven coils, a mandrel consisting of an odd number of sticks pointing either radially or axially is used, and
 the wire is fed woven between adjacent sticks in an alternating direction. While visually similar to honeycomb coils,