28raining · 28raining · Sep 8, 2026 · Sep 8, 2026 · Sep 8, 2026
diff --git a/src/Circuit.jsx b/src/Circuit.jsx
@@ -940,8 +940,6 @@ function Circuit({ userCircuit, setUserCircuit, frequency, setSettings, showIdea
   const w = 2 * Math.PI * frequency;
   const [modalOpen, setModalOpen] = useState(false);
   const [modalSparam, setModalSparam] = useState(false);
-  const [shortedStubDialogOpen, setShortedStubDialogOpen] = useState(false);
-  const [hasSeenShortedStubPopup, setHasSeenShortedStubPopup] = useState(false);
 
   const sParamIndex = userCircuit.findIndex((c) => c.name === "sparam");
   const s1pIndex = userCircuit.findIndex((c) => c.type === "s1p");
@@ -1128,9 +1126,6 @@ function Circuit({ userCircuit, setUserCircuit, frequency, setSettings, showIdea
                       setModalOpen(true);
                     } else if (k == "sparam") {
                       setModalSparam(true);
-                    } else if (k === "shortedStub" && !hasSeenShortedStubPopup) {
-                      setHasSeenShortedStubPopup(true);
-                      setShortedStubDialogOpen(true);
                     }
                   }}
                   color="bland"
@@ -1155,14 +1150,6 @@ function Circuit({ userCircuit, setUserCircuit, frequency, setSettings, showIdea
             );
         })}
       </Grid>
-      <Dialog open={shortedStubDialogOpen} onClose={() => setShortedStubDialogOpen(false)}>
-        <Box sx={{ p: 2 }}>
-          <Typography sx={{ mb: 2 }}>{t("circuit.shortedStubDialog")}</Typography>
-          <Button variant="contained" onClick={() => setShortedStubDialogOpen(false)}>
-            {t("common.ok")}
-          </Button>
-        </Box>
-      </Dialog>
       <div style={{ display: "flex", width: "100%" }}>
         <p>
           {t("circuit.hint", {

diff --git a/src/ReleaseNotes.jsx b/src/ReleaseNotes.jsx
@@ -14,6 +14,7 @@ import TableRow from "@mui/material/TableRow";
 
 function ReleaseNotes() {
   const { t } = useTranslation();
+  const v23 = t("release.v23", { returnObjects: true });
   const v22 = t("release.v22", { returnObjects: true });
   const v21 = t("release.v21", { returnObjects: true });
   const v20features = t("release.v20features", { returnObjects: true });
@@ -41,6 +42,17 @@ function ReleaseNotes() {
               </TableRow>
             </TableHead>
             <TableBody>
+              <TableRow>
+                <TableCell>
+                  <Typography>v2.3</Typography>
+                </TableCell>
+                <TableCell>
+                  <Typography>September 2026</Typography>
+                </TableCell>
+                <TableCell>
+                  <ul>{Array.isArray(v23) && v23.map((item, i) => <li key={i}>{item}</li>)}</ul>
+                </TableCell>
+              </TableRow>
               <TableRow>
                 <TableCell>
                   <Typography>v2.2</Typography>

diff --git a/src/impedanceFunctions.js b/src/impedanceFunctions.js
@@ -14,10 +14,10 @@ import { sParamFrequencyRange } from "./sparam.js"; // Import the sParamFrequenc
 
 const detailedResolution = 50;
 
-export function calculateTlineZ(resolution, component, line_length, beta, startImaginary, startReal, impedanceResolution, startAdmittance) {
+export function calculateTlineZ(resolution, component, line_length, beta, startImaginary, startReal, impedanceResolution, startAdmittance, flipArc) {
   var tan_beta, zBottom_inv, zTop;
   for (var j = 0; j <= resolution; j++) {
-    if (component.name == "shortedStub") tan_beta = Math.tan((beta * j * line_length) / resolution + Math.PI / 2);
+    if (flipArc) tan_beta = Math.tan((beta * j * -line_length) / resolution);
     else tan_beta = Math.tan((beta * j * line_length) / resolution);
 
     if (component.name == "transmissionLine") {
@@ -147,8 +147,18 @@ export function calculateImpedance(userCircuit, frequency, resolution, showIdeal
           startAdmittance,
         );
 
-      line_length = ((lengthLambda % 0.5) * speedOfLight) / frequency;
-      calculateTlineZ(resolution, component, line_length, beta, startImaginary, startReal, impedanceResolution, startAdmittance);
+      var segmentLambda = lengthLambda % 0.5;
+      var flipArc = false;
+      if (component.name === "shortedStub") {
+        if (segmentLambda > 0 && segmentLambda < 0.25) {
+          flipArc = true;
+          segmentLambda = 0.25 - segmentLambda;
+        } else if (segmentLambda >= 0.25) {
+          segmentLambda = segmentLambda - 0.25;
+        }
+      }
+      line_length = (segmentLambda * speedOfLight) / frequency;
+      calculateTlineZ(resolution, component, line_length, beta, startImaginary, startReal, impedanceResolution, startAdmittance, flipArc);
     } else if (component.name == "transformer") {
       if (component.model === "ideal") {
         // Ideal transformer: Z_out = n² * Z_in (turns ratio n from primary to secondary)

diff --git a/src/locales/en.json b/src/locales/en.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey. This work is licensed under a Creative Commons Attribution 4.0 International License. You may not resell this tool",
-    "version": "v2.0"
+    "version": "v2.3"
   },
   "language": {
     "label": "Language"
@@ -212,7 +212,6 @@
       "tolerance": "Tolerance",
       "qFactorEquals": "Q Factor = {{v}}"
     },
-    "shortedStubDialog": "Shorted-stub arc starts at 0-ohms (length = 0), therefore will not be connected to the previous point. This may seem unintuitive but makes more sense once considering frequency-span and tolerance",
     "hint": "Click components above to add them to the circuit below. Impedance is looking {{direction}}",
     "towardsBlackBox": "towards the BLACK BOX",
     "towardsTermination": "from the termination",
@@ -237,6 +236,7 @@
     "version": "Version",
     "date": "Date",
     "notes": "Notes",
+    "v23": ["Shorted stub arcs now connect from the current impedance point to the final impedance (opposed to from 0ohms)"],
     "v22": [
       "Reworked .s1p matching: S-parameter block on the left, matching components to the right, load termination at the end",
       "Legacy .s1p share links migrate automatically",

diff --git a/src/locales/es.json b/src/locales/es.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey. Esta obra tiene licencia Creative Commons Atribución 4.0 Internacional. No puede revender esta herramienta",
-    "version": "v2.0"
+    "version": "v2.3"
   },
   "language": {
     "label": "Idioma"
@@ -212,7 +212,6 @@
       "tolerance": "Tolerancia",
       "qFactorEquals": "Factor Q = {{v}}"
     },
-    "shortedStubDialog": "El arco del stub en corto comienza en 0 Ω (longitud = 0), por lo que no se conectará al punto anterior. Puede parecer poco intuitivo pero encaja con el rango de frecuencia y la tolerancia",
     "hint": "Pulse los componentes de arriba para añadirlos al circuito. La impedancia se ve {{direction}}",
     "towardsBlackBox": "hacia la CAJA NEGRA",
     "towardsTermination": "hacia la TERMINACIÓN",
@@ -237,6 +236,7 @@
     "version": "Versión",
     "date": "Fecha",
     "notes": "Notas",
+    "v23": ["Los arcos del stub en corto conectan desde el punto de impedancia actual hasta la impedancia final (en lugar de desde 0 Ω)"],
     "v22": [
       "Flujo .s1p mejorado: bloque S a la izquierda, red de adaptación a la derecha, terminación al final",
       "Los enlaces .s1p antiguos se migran automáticamente",

diff --git a/src/locales/fr.json b/src/locales/fr.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey. Cette œuvre est sous licence Creative Commons Attribution 4.0 International. Vous ne pouvez pas revendre cet outil",
-    "version": "v2.0"
+    "version": "v2.3"
   },
   "language": {
     "label": "Langue"
@@ -212,7 +212,6 @@
       "tolerance": "Tolérance",
       "qFactorEquals": "Facteur Q = {{v}}"
     },
-    "shortedStubDialog": "L’arc du stub court-circuité part de 0 Ω (longueur = 0) et ne se raccorde donc pas au point précédent. Cela peut surprendre mais est cohérent avec la plage de fréquence et la tolérance",
     "hint": "Cliquez sur les composants ci-dessus pour les ajouter au circuit. L’impédance est vue {{direction}}",
     "towardsBlackBox": "vers la BOÎTE NOIRE",
     "towardsTermination": "vers la TERMINAISON",
@@ -237,6 +236,7 @@
     "version": "Version",
     "date": "Date",
     "notes": "Notes",
+    "v23": ["Les arcs du stub court-circuité partent du point d’impédance actuel jusqu’à l’impédance finale (au lieu de partir de 0 Ω)"],
     "v22": [
       "Adaptation .s1p refaite : bloc S à gauche, réseau d’adaptation à droite, terminaison en fin de chaîne",
       "Les liens .s1p existants sont migrés automatiquement",

diff --git a/src/locales/hi.json b/src/locales/hi.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey। यह कार्य Creative Commons Attribution 4.0 International लाइसेंस के अंतर्गत है। आप इस टूल को पुनः बेच नहीं सकते",
-    "version": "v2.0"
+    "version": "v2.3"
   },
   "language": {
     "label": "भाषा"
@@ -212,7 +212,6 @@
       "tolerance": "टॉलरेंस",
       "qFactorEquals": "Q फैक्टर = {{v}}"
     },
-    "shortedStubDialog": "शॉर्टेड-स्टब चाप 0 ओम (लंबाई = 0) से शुरू होता है, इसलिए पिछले बिंदु से जुड़ा नहीं होगा। यह अजीब लग सकता है लेकिन आवृत्ति-स्पैन और टॉलरेंस के साथ अधिक समझ में आता है",
     "hint": "ऊपर के घटकों पर क्लिक करके उन्हें नीचे सर्किट में जोड़ें। इम्पीडेंस {{direction}} देख रहा है",
     "towardsBlackBox": "ब्लैक बॉक्स की ओर",
     "towardsTermination": "टर्मिनेशन की ओर",
@@ -237,6 +236,7 @@
     "version": "संस्करण",
     "date": "तारीख",
     "notes": "नोट्स",
+    "v23": ["शॉर्टेड स्टब चाप अब वर्तमान इम्पीडेंस बिंदु से अंतिम इम्पीडेंस तक जुड़ते हैं (0 Ω से नहीं)"],
     "v22": [
       ".s1p मिलान अपडेट: बाएँ S-पैरामीटर, दाएँ मिलान नेटवर्क, अंत में टर्मिनेशन",
       "पुराने .s1p लिंक स्वचालित रूप से माइग्रेट होते हैं",

diff --git a/src/locales/ja.json b/src/locales/ja.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey. 本作品はクリエイティブ・コモンズ表示4.0国際ライセンスの下で提供されています。本ツールの再販は禁止です",
-    "version": "v2.0"
+    "version": "v2.3"
   },
   "language": {
     "label": "言語"
@@ -212,7 +212,6 @@
       "tolerance": "許容差",
       "qFactorEquals": "Q = {{v}}"
     },
-    "shortedStubDialog": "短絡スタブの円弧は0Ω（長さ=0）から始まるため、前の点には接続されません。周波数スパンと許容差を考えると納得できます",
     "hint": "上の部品をクリックして下の回路に追加します。インピーダンスは{{direction}}を見ています",
     "towardsBlackBox": "ブラックボックス方向",
     "towardsTermination": "終端方向",
@@ -237,6 +236,7 @@
     "version": "バージョン",
     "date": "日付",
     "notes": "内容",
+    "v23": ["短絡スタブの円弧が現在のインピーダンス点から最終インピーダンスまでつながるように改善（0Ωからではなく）"],
     "v22": [
       ".s1pマッチングを改善：左にSパラメータ、右にマッチングネットワーク、末尾に終端",
       "旧.s1p共有URLは自動的に移行",

diff --git a/src/locales/tr.json b/src/locales/tr.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey. Bu çalışma Creative Commons Atıf 4.0 Uluslararası Lisansı altındadır. Bu aracı yeniden satamazsınız",
-    "version": "sürüm 2.0"
+    "version": "sürüm 2.3"
   },
   "language": {
     "label": "Dil"
@@ -212,7 +212,6 @@
       "tolerance": "Tolerans",
       "qFactorEquals": "Q faktörü = {{v}}"
     },
-    "shortedStubDialog": "Kısa devre stub yayı 0 Ω’da (uzunluk = 0) başlar, bu yüzden önceki noktaya bağlı görünmez. İlk bakışta karşı sezgine gelebilir; frekans aralığı ve tolerans düşünüldüğünde daha anlaşılır olur",
     "hint": "Aşağıdaki devreye eklemek için yukarıdaki bileşenlere tıklayın. Empedans yönü: {{direction}}",
     "towardsBlackBox": "KARA KUTU'ya doğru",
     "towardsTermination": "SONLANDIRMA'ya doğru",
@@ -237,6 +236,7 @@
     "version": "Sürüm",
     "date": "Tarih",
     "notes": "Notlar",
+    "v23": ["Kısa devre stub yayları artık geçerli empedans noktasından son empedansa bağlanır (0 Ω yerine)"],
     "v22": [
       ".s1p eşleme yenilendi: solda S-parametre, sağda eşleme ağı, sonda sonlandırma",
       "Eski .s1p paylaşım bağlantıları otomatik taşınır",

diff --git a/src/locales/zh.json b/src/locales/zh.json
@@ -45,7 +45,7 @@
   },
   "footer": {
     "license": "© {{year}} Will Kelsey。本作品采用知识共享署名 4.0 国际许可协议。不得转售本工具",
-    "version": "v2.0"
+    "version": "v2.3"
   },
   "language": {
     "label": "语言"
@@ -212,7 +212,6 @@
       "tolerance": "容差",
       "qFactorEquals": "Q 值 = {{v}}"
     },
-    "shortedStubDialog": "短路短截线弧从 0 欧（长度 = 0）开始，因此不会连接到前一点。看似不直观，但结合频率范围与容差后更易理解",
     "hint": "点击上方元件将其加入下方电路。阻抗为看向 {{direction}}",
     "towardsBlackBox": "黑盒方向",
     "towardsTermination": "终端方向",
@@ -237,6 +236,7 @@
     "version": "版本",
     "date": "日期",
     "notes": "说明",
+    "v23": ["短路短截线弧现从当前阻抗点连接到最终阻抗（而非从 0 Ω 起）"],
     "v22": ["改进 .s1p 匹配流程：左侧 S 参数、右侧匹配网络、末端负载", "旧 .s1p 分享链接自动迁移", "反射系数与原始 S 参数数据同时绘制"],
     "v21": ["新增 S 参数元件", "新增用于 s2p 增益的增益圆", "新增若干 S 参数教程"],
     "v20a": "网站从 will-kelsey.com/smith_chart/ 迁移至 onlinesmithchart.com",

diff --git a/tests/impedance.test.js b/tests/impedance.test.js
@@ -4,6 +4,26 @@ import { readFileSync /*, writeFileSync*/ } from "fs";
 import { join } from "path";
 import { allImpedanceCalculations, calculateImpedance } from "../src/impedanceFunctions.js";
 
+const FLOAT_PRECISION = 10;
+
+function expectProcessedImpedanceResults(actual, expected) {
+  const { refReal, refImag, ...expectedRest } = expected;
+  expect(actual).toMatchObject(expectedRest);
+  expect(actual.refReal).toBeCloseTo(refReal, FLOAT_PRECISION);
+  expect(actual.refImag).toBeCloseTo(refImag, FLOAT_PRECISION);
+}
+
+function expectImpedanceArcs(actual, expected, precision = FLOAT_PRECISION) {
+  expect(actual.length).toBe(expected.length);
+  for (let i = 0; i < actual.length; i++) {
+    expect(actual[i].length).toBe(expected[i].length);
+    for (let j = 0; j < actual[i].length; j++) {
+      expect(actual[i][j].real).toBeCloseTo(expected[i][j].real, precision);
+      expect(actual[i][j].imaginary).toBeCloseTo(expected[i][j].imaginary, precision);
+    }
+  }
+}
+
 test("Transmission line impedance test", () => {
   const circuit = [
     { name: "blackBox", real: 25, imaginary: -25 },
@@ -20,7 +40,7 @@ test("Transmission line impedance test", () => {
       { real: 46.53103192423643, imaginary: 48.109436254243874 },
     ],
   ];
-  expect(impedance).toEqual(expected);
+  expectImpedanceArcs(impedance, expected);
 });
 
 test("Impedance L-R-Shorted-Stub", () => {
@@ -67,7 +87,7 @@ test("Impedance L-R-Shorted-Stub", () => {
     settings,
   );
 
-  expect(processedImpedanceResults).toEqual({
+  expectProcessedImpedanceResults(processedImpedanceResults, {
     zStr: "27.88 - 11.2j",
     zPolarStr: "30.05 ∠ -21.88°",
     refStr: "-0.258 - 0.181j",
@@ -116,7 +136,7 @@ test("Cap with ESL and ESR", () => {
     settings,
   );
 
-  expect(processedImpedanceResults).toEqual({
+  expectProcessedImpedanceResults(processedImpedanceResults, {
     zStr: "73.00 - 34.57j",
     zPolarStr: "80.77 ∠ -25.34°",
     refStr: "0.246 - 0.212j",
@@ -166,7 +186,7 @@ test("Ideal Transformer", () => {
     settings,
   );
 
-  expect(processedImpedanceResults).toEqual({
+  expectProcessedImpedanceResults(processedImpedanceResults, {
     zStr: "83.23 + 83.23j",
     zPolarStr: "117.71 ∠ 45.00°",
     refStr: "0.460 + 0.337j",
@@ -215,7 +235,7 @@ test("Coupled Transformer", () => {
     settings,
   );
 
-  expect(processedImpedanceResults).toEqual({
+  expectProcessedImpedanceResults(processedImpedanceResults, {
     zStr: "152.12 - 339.33j",
     zPolarStr: "371.87 ∠ -65.85°",
     refStr: "0.870 - 0.218j",