reafactor: parabolspiegel

2026-08-14 23:40:19 +02:00
parent fd30e7ff9e
commit 195bfee86c
5 changed files with 238 additions and 3 deletions
@@ -0,0 +1,75 @@
+% DL9MJ, Matthias Jung, 2026
+\begin{tikzpicture}
+
+    % Parameter
+    \pgfmathsetmacro{\f}{1.4}       % Brennweite des Mutter-Paraboloids
+    \pgfmathsetmacro{\ap}{2.4}      % halbe Apertur
+    \pgfmathsetmacro{\ymin}{0.75}   % unterer Rand des Offset-Ausschnitts
+    \pgfmathsetmacro{\ymax}{2.55}   % oberer Rand des Offset-Ausschnitts
+    \pgfmathsetmacro{\xend}{5.2}    % Ende der reflektierten Strahlen
+
+    % Brennpunkt des Mutter-Paraboloids
+    \coordinate (F) at (\f,0);
+
+    % ------------------------------------------------------------
+    % Mutter-Paraboloid nur angedeutet
+    % ------------------------------------------------------------
+    \draw[gray!45, dashed, thick]
+        plot[
+            variable=\t,
+            domain=-2.6:2.6,
+            samples=120,
+            smooth
+        ]
+        ({\t*\t/(4*\f)},{\t});
+
+    % Achse des Mutter-Paraboloids
+    \draw[gray!45, dashed, thick] (-0.15,0) -- (\xend,0);
+
+    % ------------------------------------------------------------
+    % Offsetspiegel: nur ein seitlicher Ausschnitt
+    % ------------------------------------------------------------
+    \draw[ultra thick]
+        plot[
+            variable=\t,
+            domain=\ymin:\ymax,
+            samples=100,
+            smooth
+        ]
+        ({\t*\t/(4*\f)},{\t});
+
+    % Unterer Punkt des Offsetspiegels
+    \coordinate (Mlow) at ({\ymin*\ymin/(4*\f)}, {\ymin});
+
+    % ------------------------------------------------------------
+    % Feed / Erregerantenne im Brennpunkt
+    % ------------------------------------------------------------
+
+    \draw({(-\ap)*(-\ap)/(4*\f)},{-\ap}) coordinate(end);
+
+    % Feed / Antenne im Brennpunkt
+    \node[bareantenna, scale=1.0, anchor=west] (ant) at (F) {};
+
+    \draw(end) to [open] ++(2,0) node[trxshape, scale=1, anchor=west](trx){};
+
+    % Anschlussleitung und TRX
+    \draw (ant)
+        -- ++(0,-1.2) coordinate(h)
+        -| (trx.north);
+
+    % ------------------------------------------------------------
+    % Strahlen vom Feed zum Offsetspiegel und danach parallel
+    % ------------------------------------------------------------
+    \foreach \yy in {0.85,1.20,1.55,1.90,2.25,2.50} {
+        \pgfmathsetmacro{\xx}{\yy*\yy/(4*\f)}
+
+        % vom Brennpunkt zum Spiegel
+        \draw[DARCred, thick]
+            (F) -- (\xx,\yy);
+
+        % reflektierter Strahl parallel zur Achse
+        \draw[DARCred, thick]
+            (\xx,\yy) -- (\xend,\yy);
+    }
+
+\end{tikzpicture}
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="255.228pt" height="175.794pt" viewBox="0 0 255.228 175.794">
+<defs>
+<clipPath id="clip-0">
+<path clip-rule="nonzero" d="M 138 0.164062 L 254.457031 0.164062 L 254.457031 175.425781 L 138 175.425781 Z M 138 0.164062 "/>
+</clipPath>
+<clipPath id="clip-1">
+<path clip-rule="nonzero" d="M 0 0.164062 L 49 0.164062 L 49 58 L 0 58 Z M 0 0.164062 "/>
+</clipPath>
+<clipPath id="clip-2">
+<path clip-rule="nonzero" d="M 25 0.164062 L 254.457031 0.164062 L 254.457031 40 L 25 40 Z M 25 0.164062 "/>
+</clipPath>
+<clipPath id="clip-3">
+<path clip-rule="nonzero" d="M 138 63 L 254.457031 63 L 254.457031 139 L 138 139 Z M 138 63 "/>
+</clipPath>
+<clipPath id="clip-4">
+<path clip-rule="nonzero" d="M 0 35 L 161 35 L 161 175.425781 L 0 175.425781 Z M 0 35 "/>
+</clipPath>
+</defs>
+<g clip-path="url(#clip-0)">
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 150.790678 127.753952 L 255.261975 175.977501 L 255.117006 49.19674 L 150.64571 0.977109 Z M 150.790678 127.753952 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+</g>
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 65.255392 108.71999 L 65.059489 131.170505 L 101.470071 147.861463 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+<g clip-path="url(#clip-1)">
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 1.171514 129.92456 L 0.975611 152.378993 L 37.386193 169.069952 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+</g>
+<g clip-path="url(#clip-2)">
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 37.06883 168.752588 L 101.152708 147.790938 L 254.995546 175.903058 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+</g>
+<g clip-path="url(#clip-3)">
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 150.304838 101.910392 L 254.995546 49.19674 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+</g>
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 0.830643 152.230106 L 65.157441 131.291965 L 150.716235 128.071315 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+<g clip-path="url(#clip-4)">
+<path fill="none" stroke-width="0.79701" stroke-linecap="butt" stroke-linejoin="miter" stroke="rgb(0%, 0%, 0%)" stroke-opacity="1" stroke-miterlimit="10" d="M 1.073563 130.04602 L 65.157441 108.84145 L 150.473315 1.122077 " transform="matrix(0.996984, 0, 0, -0.996984, -0.4297, 176.001506)"/>
+</g>
+</svg>
@@ -0,0 +1,45 @@
+\begin{tikzpicture}
+
+  % Hornöffnung
+  \draw[thick]
+    (6.179,5.235) --
+    (10.460,7.211) --
+    (10.454,2.016) --
+    (6.173,0.040) --
+    cycle;
+
+  % Hohlleiter / Übergang
+  \draw[thick]
+    (2.674,4.455) --
+    (2.666,5.375) --
+    (4.158,6.059);
+
+  \draw[thick]
+    (0.048,5.324) --
+    (0.040,6.244) --
+    (1.532,6.928);
+
+  % obere Kanten
+  \draw[thick]
+    (1.519,6.915) --
+    (4.145,6.056) --
+    (10.449,7.208);
+
+  % untere Hornkante
+  \draw[thick]
+    (6.159,4.176) --
+    (10.449,2.016);
+
+  % mittlere Hohlleiter- und Hornkante
+  \draw[thick]
+    (0.034,6.238) --
+    (2.670,5.380) --
+    (6.176,5.248);
+
+  % untere Kante
+  \draw[thick]
+    (0.044,5.329) --
+    (2.670,4.460) --
+    (6.166,0.046);
+
+\end{tikzpicture}