{"id":625,"date":"2026-04-24T08:54:00","date_gmt":"2026-04-24T00:54:00","guid":{"rendered":"https:\/\/www.han-sphere.com\/?p=625"},"modified":"2026-04-21T22:15:59","modified_gmt":"2026-04-21T14:15:59","slug":"controlled-impedance-pcb-design-50ohm-100ohm","status":"publish","type":"post","link":"https:\/\/www.han-sphere.com\/de\/blog\/news\/controlled-impedance-pcb-design-50ohm-100ohm\/","title":{"rendered":"PCB-Design mit kontrollierter Impedanz: Wie man 50\u03a9 und 100\u03a9 erreicht"},"content":{"rendered":"<p>Irgendwann in der Hochgeschwindigkeitskonstruktion funktioniert das \u201cGrobrouting\u201d nicht mehr.<\/p>\n\n\n\n<p>Sie beginnen zu sehen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reflexionen<\/li>\n\n\n\n<li>Signalverzerrung<\/li>\n\n\n\n<li>instabile Verbindungen<\/li>\n<\/ul>\n\n\n\n<p>In diesem Fall ist eine Impedanzkontrolle erforderlich.<\/p>\n\n\n\n<p>Die meisten Entw\u00fcrfe zielen darauf ab:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>50\u03a9<\/strong> (single-ended)<\/li>\n\n\n\n<li><strong>100\u03a9 differentiell<\/strong> (gepaarte Signale)<\/li>\n<\/ul>\n\n\n\n<p>Um dieses Ziel zu erreichen, kommt es nicht nur auf die Leiterbahnbreite an, sondern auf eine Kombination aus Stapelung, Materialien und Fertigungstoleranzen.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"436\" src=\"http:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance.jpg\" alt=\"Kontrollierte Impedanz\" class=\"wp-image-626\" srcset=\"https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance.jpg 600w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-300x218.jpg 300w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Was ist kontrollierte Impedanz?<\/h2>\n\n\n\n<p>Kontrollierte Impedanz bedeutet, dass die Leiterbahnen auf der Leiterplatte so gestaltet sind, dass ihre charakteristische Impedanz innerhalb einer bestimmten Toleranz liegt (z. B. 50\u03a9 \u00b110%).<\/p>\n\n\n\n<p>Es kommt darauf an:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leiterbahnbreite<\/li>\n\n\n\n<li>Spurendicke<\/li>\n\n\n\n<li>dielektrische Dicke<\/li>\n\n\n\n<li>Dielektrizit\u00e4tskonstante (Er)<\/li>\n\n\n\n<li>Bezugsebene<\/li>\n<\/ul>\n\n\n\n<p>\u00c4ndert sich einer dieser Werte, \u00e4ndert sich die Impedanz.<\/p>\n\n\n\n<p>Hintergrund zu Er: <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/fr4-dielectric-constant-er-vs-frequency\/\">FR4 Dielektrizit\u00e4tskonstante (Er) vs. Frequenz erkl\u00e4rt<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Warum 50\u03a9 und 100\u03a9?<\/h2>\n\n\n\n<p>Diese Werte sind nicht zuf\u00e4llig.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>50\u03a9<\/strong> ist ein g\u00e4ngiger Standard f\u00fcr unsymmetrische HF- und Hochgeschwindigkeitssignale<\/li>\n\n\n\n<li><strong>100\u03a9 differentiell<\/strong> wird h\u00e4ufig f\u00fcr Schnittstellen wie LVDS, USB, Ethernet<\/li>\n<\/ul>\n\n\n\n<p>Sie stellen ein Gleichgewicht zwischen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Signalverlust<\/li>\n\n\n\n<li>Leistungsaufnahme<\/li>\n\n\n\n<li>Herstellbarkeit<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Gemeinsame Strukturen von \u00dcbertragungsleitungen<\/h2>\n\n\n\n<p>Die Impedanz h\u00e4ngt stark von der Stapelung ab.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Microstrip (\u00e4u\u00dfere Schicht)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Spur auf \u00e4u\u00dferer Schicht<\/li>\n\n\n\n<li>Bezugsebene unten<\/li>\n<\/ul>\n\n\n\n<p>Vorteile:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>leicht zu leiten<\/li>\n\n\n\n<li>zug\u00e4nglich<\/li>\n<\/ul>\n\n\n\n<p>Nachteile:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>mehr EMI<\/li>\n\n\n\n<li>empfindlicher gegen\u00fcber der Umwelt<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Stripline (innere Schicht)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leiterbahn zwischen zwei Bezugsebenen<\/li>\n<\/ul>\n\n\n\n<p>Vorteile:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>bessere Abschirmung<\/li>\n\n\n\n<li>geringere EMI<\/li>\n\n\n\n<li>stabilere Impedanz<\/li>\n<\/ul>\n\n\n\n<p>Nachteile:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>erschwerter Zugang<\/li>\n\n\n\n<li>strengere Fertigungskontrolle<\/li>\n<\/ul>\n\n\n\n<p>Stackup-Grundlagen: <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/fr4-pcb-stackup-design-guide\/\">FR4 PCB Stackup Design Leitfaden<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"430\" src=\"http:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-1.jpg\" alt=\"Kontrollierte Impedanz\" class=\"wp-image-627\" srcset=\"https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-1.jpg 600w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-1-300x215.jpg 300w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-1-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Schl\u00fcsselfaktoren, die die Impedanz beeinflussen<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. Leiterbahnbreite<\/h3>\n\n\n\n<p>Breitere Leiterbahn \u2192 niedrigere Impedanz<br>Schmalere Leiterbahn \u2192 h\u00f6here Impedanz<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Dielektrische Dicke<\/h3>\n\n\n\n<p>Gr\u00f6\u00dferer Abstand zur Ebene \u2192 h\u00f6here Impedanz<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Dielektrizit\u00e4tskonstante (Er)<\/h3>\n\n\n\n<p>H\u00f6here Er \u2192 niedrigere Impedanz<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">4. Dicke des Kupfers<\/h3>\n\n\n\n<p>Dickeres Kupfer senkt die Impedanz leicht<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">5. Qualit\u00e4t der Bezugsebene<\/h3>\n\n\n\n<p>F\u00fcr eine stabile Impedanz ist eine durchgehende Ebene erforderlich.<\/p>\n\n\n\n<p>Details zum R\u00fcckweg: <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/pcb-return-path-ground-plane-high-speed-design\/\">PCB-R\u00fcckleitung und Massefl\u00e4che im Hochgeschwindigkeitsdesign<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">50\u03a9 vs. 100\u03a9 Differenzial (Schnellvergleich)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>50\u03a9 Einseitig endend<\/th><th>100\u03a9 Differenzial<\/th><\/tr><\/thead><tbody><tr><td>Signalart<\/td><td>einzelne Zeile<\/td><td>gepaarte Linien<\/td><\/tr><tr><td>Empfindlichkeit<\/td><td>m\u00e4\u00dfig<\/td><td>h\u00f6her<\/td><\/tr><tr><td>Routing-Komplexit\u00e4t<\/td><td>unter<\/td><td>h\u00f6her<\/td><\/tr><tr><td>St\u00f6rimmunit\u00e4t<\/td><td>unter<\/td><td>h\u00f6her<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Differentialpaare beruhen auf einer engen Kopplung zwischen den beiden Leiterbahnen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wie man eine kontrollierte Impedanz erreicht<\/h2>\n\n\n\n<div class=\"schema-how-to wp-block-yoast-how-to-block\"><p class=\"schema-how-to-description\">Dies ist der Punkt, an dem Entw\u00fcrfe erfolgreich sind oder scheitern.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1776779901800\"><strong class=\"schema-how-to-step-name\">1. Beginnen Sie mit Stackup (nicht Routing)<\/strong> <p class=\"schema-how-to-step-text\">Definieren Sie:<br\/>.layer Struktur<br\/>.dielektrische Dicke<br\/>.material type<br\/>...bevor Sie etwas verlegen.<br\/>Wenn der Stackup falsch ist, l\u00e4sst sich das durch Trace-Tuning nicht beheben.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776779941788\"><strong class=\"schema-how-to-step-name\">2. Verwendung von Impedanzrechnern oder Feldl\u00f6sern<\/strong> <p class=\"schema-how-to-step-text\">Die Werkzeuge sch\u00e4tzen die Geometrie der Spur auf der Grundlage:<br\/>.Zielimpedanz<br\/>.material properties<br\/>Aber denken Sie daran: Werkzeuge sind N\u00e4herungswerte.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776779953619\"><strong class=\"schema-how-to-step-name\">3. Arbeiten Sie fr\u00fchzeitig mit Ihrem Leiterplattenhersteller zusammen<\/strong> <p class=\"schema-how-to-step-text\">Dieser Schritt wird oft \u00fcbersprungen und f\u00fchrt sp\u00e4ter zu Problemen.<br\/>Hersteller bieten:<br\/>.aktuelle Laminatdaten<br\/>.erreichbare Toleranzen<br\/>.Impedanztabellen<br\/>Sie k\u00f6nnen den Stackup anpassen, um Ihr Ziel zu treffen.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776779979597\"><strong class=\"schema-how-to-step-name\">4. Geometrie des Steuerdifferenzialpaares<\/strong> <p class=\"schema-how-to-step-text\">F\u00fcr 100\u03a9 Differential:<br\/>. die Abst\u00e4nde zwischen den Leiterbahnen sind ebenso wichtig wie die Breite<br\/>. engerer Abstand \u2192 geringere Differenzimpedanz<br\/>Auch behalten:<br\/>. gleiche L\u00e4nge<br\/>. einheitliche Abst\u00e4nde<br\/>. minimale Schr\u00e4glage<br\/>\u00dcberschneidungen: <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/pcb-crosstalk-near-end-vs-far-end\/\">PCB-Nebensprechen erkl\u00e4rt (Nahnebensprechen vs. Fernnebensprechen)<\/a><\/strong><\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776780011839\"><strong class=\"schema-how-to-step-name\">5. Kontinuierliche Bezugsebenen beibehalten<\/strong> <p class=\"schema-how-to-step-text\">Vermeiden:<br\/>. Flugzeug spaltet sich<br\/>. Verlegung \u00fcber Hohlr\u00e4ume<br\/>Diese unterbrechen die Impedanzkontinuit\u00e4t.<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1776780032147\"><strong class=\"schema-how-to-step-name\">6. Ber\u00fccksichtigung von Fertigungstoleranzen<\/strong> <p class=\"schema-how-to-step-text\">Echte Bretter variieren.<br\/>Typische Toleranz:<br\/>. \u00b15% bis \u00b110% Impedanz<br\/>Gestalten Sie also die Margen entsprechend.<\/p> <\/li><\/ol><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">H\u00e4ufige Fehler<\/h2>\n\n\n\n<p>Diese tauchen h\u00e4ufig auf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Definition der Impedanz nach dem Routing<\/li>\n\n\n\n<li>Vernachl\u00e4ssigung der Prepreg-Schwankungen<\/li>\n\n\n\n<li>die sich nur auf allgemeine Er-Werte st\u00fctzen<\/li>\n\n\n\n<li>keine R\u00fcckmeldung vom Hersteller<\/li>\n\n\n\n<li>Unterbrechung von R\u00fcckleitungen durch Durchkontaktierungen oder Spaltungen<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"448\" src=\"http:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-3.jpg\" alt=\"Kontrollierte Impedanz\" class=\"wp-image-628\" srcset=\"https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-3.jpg 600w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-3-300x224.jpg 300w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/04\/Controlled-Impedance-3-16x12.jpg 16w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">\u00dcberpr\u00fcfung der Impedanz<\/h2>\n\n\n\n<p>Man kann nicht einfach \u201cdem Design vertrauen\u201d.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Simulation<\/h3>\n\n\n\n<p>Feldl\u00f6ser sch\u00e4tzen Impedanz und Verlust.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">2. Fabrikations-Testcoupons<\/h3>\n\n\n\n<p>Die Hersteller bauen Impedanzteststrukturen in die Platte ein.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Messung<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>TDR (Zeitbereichsreflektometrie)<\/li>\n\n\n\n<li>Impedanzmessger\u00e4te<\/li>\n<\/ul>\n\n\n\n<p>Diese best\u00e4tigen die tats\u00e4chlichen Ergebnisse.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Praktische Gestaltungshinweise<\/h2>\n\n\n\n<p>Aus realen Projekten:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Stackup-Entscheidungen sind wichtiger als Trace-Tweaks<\/li>\n\n\n\n<li>innere Schichten sind stabiler als \u00e4u\u00dfere Schichten<\/li>\n\n\n\n<li>kleine Abstandsfehler k\u00f6nnen die differentielle Impedanz unterbrechen<\/li>\n\n\n\n<li>Kommunikation mit der PCB-Fertigung spart Zeit<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Schlussfolgerung<\/h2>\n\n\n\n<p>Das Design mit kontrollierter Impedanz ist eine Kombination aus Geometrie, Materialien und Fertigungskontrolle.<\/p>\n\n\n\n<p>50\u03a9- und 100\u03a9-Ziele sind erreichbar, aber nur, wenn Stapelung, Routing und Fertigung aufeinander abgestimmt sind. Je fr\u00fcher die Impedanz im Entwurfsprozess ber\u00fccksichtigt wird, desto einfacher ist es, die Leistungsanforderungen zu erf\u00fcllen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQ<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1776780183671\"><strong class=\"schema-faq-question\">F: Was bedeutet kontrollierte Impedanz beim PCB-Design?<\/strong> <p class=\"schema-faq-answer\">A: Es bedeutet, Leiterbahnen so zu gestalten, dass ein bestimmter Impedanzwert innerhalb der Toleranz gehalten wird.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776780194981\"><strong class=\"schema-faq-question\">F: Warum werden in der Regel 50\u03a9 verwendet?<\/strong> <p class=\"schema-faq-answer\">A: Es bietet ein Gleichgewicht zwischen Signalintegrit\u00e4t und Herstellbarkeit f\u00fcr viele Anwendungen.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776780205835\"><strong class=\"schema-faq-question\">F: Warum sind Differentialpaare 100\u03a9?<\/strong> <p class=\"schema-faq-answer\">A: Weil zwei gekoppelte Leiterbahnen zusammen eine Standard-Differentialimpedanz ergeben, die in vielen Schnittstellen verwendet wird.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776780222747\"><strong class=\"schema-faq-question\">F: Kann die Impedanz nach der Verlegung korrigiert werden?<\/strong> <p class=\"schema-faq-answer\">A: Nicht einfach. In der Regel sind daf\u00fcr \u00c4nderungen an der Stapelung oder Geometrie erforderlich.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1776780251609\"><strong class=\"schema-faq-question\">F: Wie genau ist die Impedanzkontrolle?<\/strong> <p class=\"schema-faq-answer\">A: Typischerweise innerhalb von \u00b15% bis \u00b110%, je nach Fertigungsm\u00f6glichkeiten.<\/p> <\/div> <\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Eine kontrollierte Impedanz ist beim Design von Hochgeschwindigkeits-Leiterplatten unerl\u00e4sslich, um die Signalintegrit\u00e4t zu gew\u00e4hrleisten und Reflexionen zu minimieren. In diesem Artikel wird erl\u00e4utert, wie Ingenieure durch Stapeldesign, Leiterbahngeometrie und Zusammenarbeit mit Leiterplattenherstellern eine Impedanz von 50\u03a9 und 100\u03a9 erreichen.<\/p>","protected":false},"author":1,"featured_media":629,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[4],"tags":[10],"class_list":["post-625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-design"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Controlled Impedance PCB Design: 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