New features

• Added microstrip lines simulation support for Ngspice. Ngspice version >=45 is required. See #1401 #1402
• Added Jiles-Atherton magnetic core model. The same model is used by MicroCAP simulator. Added a new
  device group magnetic cores containing two new devices: Winding and Magnetic core #1284
• Added new Image paiting. This component allows to put a raster image on schematic #1403
• Added VDMOS device support #1326
• Massive redesign of schematic rendering engine, enable arbitrary angle wires #1226
• Hide the component properties incompatible with the selected simulator #974

General improvements and bugfixes

• Implemented open recent project #705
• Fixed symbol editing issues #945
• Improved S-parameter files viewer #1309
• Added context menu for document tabs #1362
• Fixed printing issues #1452
• Added possibility to plot noise contribution #1439
• Fixed settings directory for transcalc #1445
• Auto reload of netlist and log #1435

Library update

• Added Amidon, Epcos, and Ferroxcube ferrite cores library #1284
• Added VDMOS devices library #1326

Documentation

• New documentation available at: https://qucs-s-help.readthedocs.io/en/latest/
• Reorganized examples #1361

What's Changed

• New schematic machinery and removal of Q3PtrList by @wawuwo in #1266
• update qt6.9.0 by @dsm in #1290
• Fix selecting of ID_text by @wawuwo in #1297
• fix: Make label root follow its host node when the node is moving by @wawuwo in #1296
• Refactor Schematic::recreateComponent() and Component::recreate() by @wawuwo in #1244
• Change order of removal of elements in group to prevent double free by @wawuwo in #1299
• Avoid crash when moving a part of loop-wire by @wawuwo in #1300
• Make grid-step size wires selectable by @wawuwo in #1303
• Fix crash when mirroring connected component by @wawuwo in #1304
• Fix rectangle bounding box mismatch by @wawuwo in #1306
• Fix crash when double clicking to finish a wire by @wawuwo in #1311
• Remove commented out code by @wawuwo in #1313
• Fix ellipse selection by @wawuwo in #1310
• Refactor usages of Wire by @wawuwo in #1315
• Fix crash when moving a wire or a wired component by @wawuwo in #1318
• Refactor Schematic::activateSpecifiedComponent() by @poh0 in #1322
• fix: Color text in editor depending on lightness of BGColor by @tskaar in #1324
• Advanced magnetic core support by @ra3xdh in #1317
• Feature: Open recent project by @poh0 in #1330
• Add settings for wires by @wawuwo in #1329
• [WIP] S-parameter viewer update by @andresmmera in #1309
• Add VDMOS device by @ra3xdh in #1331
• Reduce the number of includes in schematic.h by @wawuwo in #1332
• S-parameter viewer: Fixes by @andresmmera in #1339
• A bit of schematic refactoring by @wawuwo in #1337
• Fix crash in settings dialog by @ra3xdh in #1341
• Project view: Open files with the system default program by @andresmmera in #1346
• Avoid double-layering wires in certain conditions by @wawuwo in #1342
• Fix crash when deleting label after wire merge by @wawuwo in #1348
• Fix for issues 1223 regarding CDL netlisting by @ThomasZecha in #1336
• Small fixes by @ra3xdh in #1350
• Fix for issue 1352 macos language selection. by @dsm in #1353
• Fix incorrect default diode model parameters in .MODEL Section component by @Radvall in #1357
• Put examples in folders by @andresmmera in #1361
• Update Gentoo ebuilds for last releases by @vaxxabait in #1363
• Add a context menu to documents tabs by @andresmmera in #1362
• Allow free editing for NODESET by @ra3xdh in #1364
• improve CI. by @dsm in #1365
• Fix missing DLLs (CI) by @dsm in #1366
• Refactor property by @wawuwo in #1356
• Fix scalars plotting by @ra3xdh in #1370
• Stop forcing LEVEL=2 into Xyce diode conversions by @tvrusso in #1373
• Refactor Schematic::activateCompsWithinRect by @wawuwo in #1371
• SPICE models for Qucsator devices by @ra3xdh in #1374
• Fixed #1377 by @ra3xdh in #1379
• Open multiple schematics from the Content View tab by @andresmmera in #1378
• Fix crahs on adding marker by @ra3xdh in #1383
• Fix crash when moving a wirelabel by @wawuwo in #1389
• Library update by @ra3xdh in #1390
• Fix wrong marker root position by @wawuwo in #1391
• Show error message if no simulator found by @ra3xdh in #1392
• Refactor Marker::initText() by @wawuwo in #1393
• graphictext: store transformed boundingRect by @tskaar in #1397
• Conductor and labels refactoring by @wawuwo in #1399
• Small refactorings by @wawuwo in #1404
• Image component by @andresmmera in #1403
• Remove some label types in favour of single 'isLabel' by @wawuwo in #1409
• config: Add option for always prefixing datasets with the simulation label by @tskaar in #1412
• SPICE support for microstrip lines by @ra3xdh in #1402
• Fix image painting component by @andresmmera in #1419
• S-parameter Viewer: Fixes by @andresmmera in #1420
• Update NEWS and VERSION before release by @ra3xdh in #1428
• LibComp: replace 'gnd' nodes with '0' nodes by @tskaar in #1427
• Feature: allow to move nodes by @wawuwo in #1433
• Feature: Reload netlist and log-files by @tskaar in #1435
• Fix issue #1053: Smith chart: stars/circles not rendered correctly when close to the chart border by @andresmmera in #1438
• graphictext: Refactor code to compute boundingRect dynamically by @tskaar in #1437
• feat(paintings): auto-snap to grid after rotation by @tskaar in #1440
• Add optional pts_per_summary parameter for Ngspice noise by @ra3xdh in #1442
• refactor(PortSymbol): Introduce setter for port name by @tskaar in #1448
• Change schematic healing logic: extend/shrink wires when possible by @wawuwo in #1449
• Fix transcalc load settings by @ra3xdh in #1451
• plot noise contributors by @VIPQualityPost in #1444
• Fix label changing its host after editing components properties by @wawuwo in #1457
• Set PixelSize instead of PointSize for simulation label fonts. by @funnydog in #1454
• Connect ComponentDialog::slotOKButton() to QDialog::accepted(). by @funnydog in #1459
• Update QT and NGSpice versions in CI by @dsm in #1461

Installation instrucitons

Installation instructions could be found at the wiki page: https://github.com/ra3xdh/qucs_s/wiki/Installation

New Contributors

• @poh0 made their first contribution in #1322
• @tskaar made their first contribution in #1324
• @tvrusso made their first contribution in #1373
• @VIPQualityPost made their first contribution in #1444
• @funnydog made their first contribution in #1454

Full Changelog: 25.1.2...25.2.0