{"id":555,"date":"2026-03-31T08:02:00","date_gmt":"2026-03-31T00:02:00","guid":{"rendered":"https:\/\/www.han-sphere.com\/?p=555"},"modified":"2026-03-26T00:16:46","modified_gmt":"2026-03-25T16:16:46","slug":"pcb-insertion-loss-dielectric-vs-conductor-loss","status":"publish","type":"post","link":"https:\/\/www.han-sphere.com\/de\/blog\/news\/pcb-insertion-loss-dielectric-vs-conductor-loss\/","title":{"rendered":"PCB Einf\u00fcgungsd\u00e4mpfung erkl\u00e4rt: Dielektrischer Verlust vs. Leitungsverlust"},"content":{"rendered":"<p>Sobald man sich mit Hochgeschwindigkeits- oder HF-Design befasst, ist die Einf\u00fcged\u00e4mpfung kein theoretisches Problem mehr, sondern zeigt sich bei Messungen.<\/p>\n\n\n\n<p>Sie verlegen eine Leiterbahn, simulieren sie, und alles sieht gut aus. Dann kommt die echte Platine zur\u00fcck, und die Signalamplitude ist geringer als erwartet. Dieser Abfall ist die Einf\u00fcged\u00e4mpfung.<\/p>\n\n\n\n<p>Grunds\u00e4tzlich ist die Einf\u00fcged\u00e4mpfung nur <strong>wie viel Signal man von einem Ende einer Leiterbahn zum anderen verliert<\/strong>. Bei den PCB stammt das meiste davon aus zwei Quellen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>dielektrischer Verlust (Material)<\/li>\n\n\n\n<li>Leitungsverlust (Kupfer)<\/li>\n<\/ul>\n\n\n\n<p>Wenn Sie beides verstehen, wissen Sie, wo das Problem liegt und was Sie realistischerweise beheben k\u00f6nnen.<\/p>\n\n\n\n<p>F\u00fcr den materiellen Hintergrund, siehe <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<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"424\" src=\"http:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/03\/Rigid-Flex-PCB-1.jpg\" alt=\"Starr-Flex-Leiterplatte\" class=\"wp-image-411\" srcset=\"https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/03\/Rigid-Flex-PCB-1.jpg 600w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/03\/Rigid-Flex-PCB-1-300x212.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Was ist Einf\u00fcged\u00e4mpfung?<\/h2>\n\n\n\n<p>Die Einf\u00fcgungsd\u00e4mpfung wird \u00fcblicherweise ausgedr\u00fcckt in <strong>dB<\/strong> und steht f\u00fcr die D\u00e4mpfung des Signals auf einem \u00dcbertragungsweg.<\/p>\n\n\n\n<p>H\u00f6here Verluste \u2192 schw\u00e4cheres Signal beim Empf\u00e4nger.<\/p>\n\n\n\n<p>Es kommt darauf an:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Leiterbahnl\u00e4nge<\/li>\n\n\n\n<li>Frequenz<\/li>\n\n\n\n<li>Materialeigenschaften<\/li>\n\n\n\n<li>Zustand der Kupferoberfl\u00e4che<\/li>\n<\/ul>\n\n\n\n<p>Der Verlust nimmt mit der Frequenz zu, weshalb er in der Praxis kritisch wird:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>digitale Hochgeschwindigkeitsverbindungen<\/li>\n\n\n\n<li>RF-Schaltungen<\/li>\n\n\n\n<li>lange Backplane-Leiterbahnen<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Dielektrischer Verlust<\/h2>\n\n\n\n<p>Der dielektrische Verlust entsteht durch das Leiterplattensubstrat selbst.<\/p>\n\n\n\n<p>W\u00e4hrend sich das Signal ausbreitet, wird ein Teil der elektromagnetischen Energie vom dielektrischen Material absorbiert und in W\u00e4rme umgewandelt.<\/p>\n\n\n\n<p>Dies wird haupts\u00e4chlich durch folgende Faktoren gesteuert:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Verlusttangente (Df)<\/li>\n\n\n\n<li>Frequenz<\/li>\n\n\n\n<li>Verhalten der Dielektrizit\u00e4tskonstante<\/li>\n<\/ul>\n\n\n\n<p>FR4 hat einen relativ h\u00f6heren Verlusttangens im Vergleich zu HF-Materialien, weshalb es bei h\u00f6heren Frequenzen schlechter abschneidet.<\/p>\n\n\n\n<p>Dies wird ausf\u00fchrlicher behandelt in <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/low-loss-pcb-materials-rf-microwave-circuits\/\">Verlustarme PCB-Materialien f\u00fcr RF- und Mikrowellenschaltungen<\/a><\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Leitungsverlust<\/h2>\n\n\n\n<p>Der Leitungsverlust h\u00e4ngt mit der Kupferleiterbahn zusammen.<\/p>\n\n\n\n<p>Bei h\u00f6heren Frequenzen flie\u00dft der Strom nicht mehr gleichm\u00e4\u00dfig durch den gesamten Leiter. Stattdessen konzentriert er sich in der N\u00e4he der Oberfl\u00e4che - ein Ph\u00e4nomen, das als <strong>Skin-Effekt<\/strong>.<\/p>\n\n\n\n<p>Mit zunehmender Frequenz:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>der effektive Widerstand steigt<\/li>\n\n\n\n<li>die Signald\u00e4mpfung steigt<\/li>\n<\/ul>\n\n\n\n<p>Auch die Oberfl\u00e4chenrauhigkeit spielt eine Rolle. Raues Kupfer vergr\u00f6\u00dfert die effektive Wegl\u00e4nge des Stroms, was die Verluste erh\u00f6ht.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"437\" src=\"http:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/02\/Rigid-PCB-2.jpg\" alt=\"Starre PCB\" class=\"wp-image-336\" srcset=\"https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/02\/Rigid-PCB-2.jpg 600w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/02\/Rigid-PCB-2-300x219.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Dielektrischer Verlust vs. Leitungsverlust (Schnellvergleich)<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Verlustart<\/th><th>Quelle<\/th><th>Dominant bei<\/th><th>Schl\u00fcsselfaktoren<\/th><\/tr><\/thead><tbody><tr><td>Dielektrischer Verlust<\/td><td>PCB-Material<\/td><td>h\u00f6here Frequenzen<\/td><td>Verlusttangente, Er<\/td><\/tr><tr><td>Leitungsverlust<\/td><td>Kupferleiterbahnen<\/td><td>alle Frequenzen (schlechter bei hohen Frequenzen)<\/td><td>Hauteffekt, Rauheit<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>In den meisten RF-Designs:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>der dielektrische Verlust dominiert bei sehr hohen Frequenzen<\/li>\n\n\n\n<li>Ein Leitungsverlust ist immer vorhanden und kann nicht ignoriert werden.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Wie sich die Frequenz auf die Einf\u00fcged\u00e4mpfung auswirkt<\/h2>\n\n\n\n<p>Die Einf\u00fcgungsd\u00e4mpfung steigt in etwa mit der Frequenz.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>der dielektrische Verlust nimmt fast linear mit der Frequenz zu<\/li>\n\n\n\n<li>der Leitungsverlust steigt mit der Quadratwurzel der Frequenz<\/li>\n<\/ul>\n\n\n\n<p>Aus diesem Grund kann ein Design, das bei 1 GHz gut funktioniert, bei 10 GHz Probleme haben, ohne dass die Geometrie ge\u00e4ndert wird.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Wie man die Einf\u00fcged\u00e4mpfung von PCBs reduziert<\/h2>\n\n\n\n<div class=\"schema-how-to wp-block-yoast-how-to-block\"><p class=\"schema-how-to-description\">Man kann Verluste nicht ausschlie\u00dfen, aber man kann sie bew\u00e4ltigen.<\/p> <ol class=\"schema-how-to-steps\"><li class=\"schema-how-to-step\" id=\"how-to-step-1774454898247\"><strong class=\"schema-how-to-step-name\">1. W\u00e4hlen Sie verlust\u00e4rmere Materialien<\/strong> <p class=\"schema-how-to-step-text\">Dies ist in der Regel der gr\u00f6\u00dfte Hebel.<br\/>Wechsel von FR4 \u2192 verlustarmes FR4 \u2192 Rogers \u2192 PTFE<br\/>geringerer Verlusttangens = weniger dielektrischer Verlust<br\/>Siehe <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/fr4-vs-rogers-pcb-high-frequency-design\/\">FR4 vs. Rogers PCB f\u00fcr Hochfrequenzdesign<\/a><\/strong><\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1774454937467\"><strong class=\"schema-how-to-step-name\">2. Kritische Signalwege verk\u00fcrzen<\/strong> <p class=\"schema-how-to-step-text\">Der Verlust ist proportional zur L\u00e4nge.<br\/>Einfach, aber oft \u00fcbersehen:<br\/>Komponenten n\u00e4her zusammenbringen<br\/>unn\u00f6tiges Routing reduzieren<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1774454949637\"><strong class=\"schema-how-to-step-name\">3. Optimierung der Stapelung<\/strong> <p class=\"schema-how-to-step-text\">Die Stapelung beeinflusst sowohl den Verlust als auch die Impedanz.<br\/>Signale nahe an den Bezugsebenen halten<br\/>Regeldielektrikumsdicke<br\/>unn\u00f6tige Ebenen\u00fcberg\u00e4nge vermeiden<br\/>Einzelheiten: <strong><a href=\"https:\/\/www.han-sphere.com\/blog\/news\/fr4-pcb-stackup-design-guide\/\">FR4 PCB Stackup Design Leitfaden<\/a><\/strong><\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1774454976716\"><strong class=\"schema-how-to-step-name\">4. Glatteres Kupfer verwenden<\/strong> <p class=\"schema-how-to-step-text\">Die Rauheit des Kupfers erh\u00f6ht den Leitungsverlust.<br\/>Viele Hochgeschwindigkeitsdesigns verwenden:<br\/>Low-Profile-Kupfer<br\/>Kupfer mit sehr niedrigem Profil (VLP)<\/p> <\/li><li class=\"schema-how-to-step\" id=\"how-to-step-1774454996070\"><strong class=\"schema-how-to-step-name\">5. Geometrie der Kontrollspuren<\/strong> <p class=\"schema-how-to-step-text\">Breitere Leiterbahnen \u2192 geringerer Widerstand \u2192 geringerer Leitungsverlust<br\/>Dies muss jedoch mit den Impedanzanforderungen in Einklang gebracht werden.<\/p> <\/li><\/ol><\/div>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"407\" src=\"http:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/02\/Rigid-PCB-8.jpg\" alt=\"Starre PCB\" class=\"wp-image-347\" srcset=\"https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/02\/Rigid-PCB-8.jpg 600w, https:\/\/www.han-sphere.com\/wp-content\/uploads\/2026\/02\/Rigid-PCB-8-300x204.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Sch\u00e4tzung der Einf\u00fcged\u00e4mpfung beim PCB-Design<\/h2>\n\n\n\n<p>In der Praxis berechnen die Ingenieure nicht alles von Hand.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. Feldl\u00f6ser oder Simulationstools verwenden<\/h3>\n\n\n\n<p>Tools k\u00f6nnen modellieren:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>dielektrischer Verlust<\/li>\n\n\n\n<li>Leitungsverlust<\/li>\n\n\n\n<li>frequenzabh\u00e4ngiges Verhalten<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. Herstellerdaten verwenden<\/h3>\n\n\n\n<p>Laminatlieferanten bieten:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Verlusttangente vs. Frequenz<\/li>\n\n\n\n<li>Dielektrizit\u00e4tskonstantenkurven<\/li>\n<\/ul>\n\n\n\n<p>Diese sind zuverl\u00e4ssiger als allgemeine Annahmen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3. Validierung durch Messung<\/h3>\n\n\n\n<p>F\u00fcr kritische Entw\u00fcrfe:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>TDR (Zeitbereichsreflektometrie)<\/li>\n\n\n\n<li>VNA (Vektor-Netzwerkanalysator)<\/li>\n<\/ul>\n\n\n\n<p>Gemessene Daten zeigen oft Dinge, die der Simulation entgehen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Praktische Beobachtungen zum Design<\/h2>\n\n\n\n<p>Einige Muster tauchen immer wieder auf:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>der Wechsel des Materials hat mehr Einfluss als die Einstellung der Leiterbahnbreite<\/li>\n\n\n\n<li>der Verlust wird mit steigender Frequenz schneller als erwartet sichtbar<\/li>\n\n\n\n<li>die Simulationsgenauigkeit h\u00e4ngt stark von den Materialmodellen ab<\/li>\n\n\n\n<li>Vernachl\u00e4ssigung der Kupferrauhigkeit f\u00fchrt zu optimistischen Ergebnissen<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Schlussfolgerung<\/h2>\n\n\n\n<p>Einf\u00fcgeverluste in Leiterplatten entstehen haupts\u00e4chlich durch dielektrische Verluste und Leitungsverluste.<\/p>\n\n\n\n<p>FR4 eignet sich f\u00fcr viele Entw\u00fcrfe, aber mit zunehmender Frequenz werden beide Arten von Verlusten immer bedeutender. Die Wahl des Materials, das Design des Stapels und die Geometrie der Leiterbahnen spielen alle eine Rolle beim Management der Signald\u00e4mpfung.<\/p>\n\n\n\n<p>Das Ziel ist nicht ein Nullverlust, sondern ein vorhersehbarer Verlust, der innerhalb Ihrer Systemmarge bleibt.<\/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-1774455135234\"><strong class=\"schema-faq-question\">Was ist die Einf\u00fcged\u00e4mpfung von Leiterplatten?<\/strong> <p class=\"schema-faq-answer\">Die Einf\u00fcged\u00e4mpfung ist die Verringerung der Signalst\u00e4rke auf dem Weg durch eine Leiterbahn und wird normalerweise in dB gemessen.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1774455158705\"><strong class=\"schema-faq-question\">Was verursacht Einf\u00fcgungsd\u00e4mpfung in PCBs?<\/strong> <p class=\"schema-faq-answer\">Die Hauptursachen sind dielektrische Verluste (Materialabsorption) und Leiterverluste (Kupferwiderstand und Skineffekt).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1774455183560\"><strong class=\"schema-faq-question\">Welcher Verlust ist wichtiger?<\/strong> <p class=\"schema-faq-answer\">Bei hohen Frequenzen \u00fcberwiegen oft die dielektrischen Verluste, aber Leiterverluste sind immer vorhanden.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1774455207802\"><strong class=\"schema-faq-question\">Kann die Einf\u00fcged\u00e4mpfung eliminiert werden?<\/strong> <p class=\"schema-faq-answer\">Nein. Sie kann nur durch Design und Materialauswahl reduziert und gesteuert werden.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1774455230897\"><strong class=\"schema-faq-question\">Wie messen Ingenieure die Einf\u00fcgungsd\u00e4mpfung?<\/strong> <p class=\"schema-faq-answer\">Verwendung von Werkzeugen wie Vektor-Netzwerkanalysatoren (VNA) und Zeitbereichsreflektometern (TDR).<\/p> <\/div> <\/div>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Die Einf\u00fcged\u00e4mpfung ist ein Schl\u00fcsselfaktor bei der Entwicklung von Hochgeschwindigkeits- und HF-Leiterplatten. Sie stellt die gesamte Signald\u00e4mpfung entlang eines \u00dcbertragungsweges dar und wird haupts\u00e4chlich durch dielektrische Verluste und Leiterverluste verursacht. In diesem Artikel wird erkl\u00e4rt, wie diese Verlustmechanismen funktionieren und wie Ingenieure sie beim Leiterplattendesign ber\u00fccksichtigen k\u00f6nnen.<\/p>","protected":false},"author":1,"featured_media":291,"comment_status":"closed","ping_status":"open","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":[45],"class_list":["post-555","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","tag-pcb-insertion-loss"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>PCB Insertion Loss Explained: Dielectric Loss vs Conductor 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