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@ -144,7 +144,7 @@ are used in multilayer PCBs.
\end{figure} \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 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, \cite{eppenAnforderungenEinzelteileRundfunkempfanger1927,
filbigLehrbuchHochfrequenztechnik1942, filbigLehrbuchHochfrequenztechnik1942,
kleinSpulenUndSchwingungskreise1941, kleinSpulenUndSchwingungskreise1941,
@ -152,12 +152,18 @@ meinkeTaschenbuchHochfrequenztechnik1956,
nottebrockSpulen1950, nottebrockSpulen1950,
struttVerstarkerUndEmpfanger1951, struttVerstarkerUndEmpfanger1951,
wiggeRundfunktechnischesHandbuch1930, wiggeRundfunktechnischesHandbuch1930,
zicknerSpulen1927}. zicknerSpulen1927}. The simplest such winding technique is the universal winding as described in depth by
Examples of both from contemporary literature are shown in Figure\ \ref{fig_illust_honeycomb_basket}. In a honeycomb \textcite{querfurthCoilWindingDescription1954}. In a simple, cylindrical wire-wound inductor, the windings are laid down
coil, subsequent winding layers are wound at a criss-cross pattern similar to how in sewing, a spool of thread is wound. one right next to the other, until the end of the winding area is met, where the winding direction is reversed. One
The characteristic feature of honeycomb coils is that the winding machine is adjusted to produce large air gaps between layer of such windings forms a helix whose pitch is equal to the wire diameter. A universal winding uses the same
adjacent windings on the same layer. When multiple layers like this are stacked, a rhomboid pattern results that is helical scheme reversing at the coil ends, but uses a helical pitch larger than the wire diameter to form a structure
vaguely reminiscent of a honeycomb's 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 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, the wire is fed woven between adjacent sticks in an alternating direction. While visually similar to honeycomb coils,