{"id":2557,"date":"2025-10-28T21:06:09","date_gmt":"2025-10-28T13:06:09","guid":{"rendered":"https:\/\/www.jingpengpcb.com\/?p=2557"},"modified":"2026-10-02T19:42:38","modified_gmt":"2026-10-02T11:42:38","slug":"impedance-and-loss-of-pcb","status":"publish","type":"post","link":"https:\/\/www.jingpengpcb.com\/en\/blog\/impedance-and-loss-of-pcb\/","title":{"rendered":"The Effects of PCB Impedance and Loss on Signals"},"content":{"rendered":"

PCB\uff08Printed Circuit Board\uff09\u7684\u963b\u6297\u548c\u635f\u8017\u5bf9\u4e8e\u9ad8\u901f\u4fe1\u53f7\u4f20\u8f93\u81f3\u5173\u91cd\u8981\u3002\u4e3a\u4e86\u6df1\u5165\u5206\u6790\u8fd9\u4e00\u590d\u6742\u7684\u4f20\u8f93\u901a\u9053\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4f20\u8f93\u901a\u9053\u7684\u51b2\u51fb\u54cd\u5e94\u6765\u7814\u7a76\u5176\u5bf9\u4fe1\u53f7\u7684\u5f71\u54cd\u3002<\/p>\n

1. \u4ec0\u4e48\u662f\u51b2\u51fb\u54cd\u5e94\uff1f<\/h2>\n

\u7535\u8def\u7684\u51b2\u51fb\u54cd\u5e94\u662f\u901a\u8fc7\u4f20\u8f93\u4e00\u4e2a\u7a84\u8109\u51b2\u6765\u83b7\u5f97\u7684\u3002\u7406\u60f3\u7684\u7a84\u8109\u51b2\u5e94\u8be5\u5177\u6709\u65e0\u9650\u7a84\u7684\u5bbd\u5ea6\u548c\u975e\u5e38\u9ad8\u7684\u5e45\u5ea6\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u60c5\u51b5\u4e0b\uff0c\u5236\u5907\u7406\u60f3\u7a84\u8109\u51b2\u6216\u8005\u65e0\u9650\u9661\u7684\u9636\u8dc3\u4fe1\u53f7\u662f\u4e0d\u73b0\u5b9e\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u4f7f\u7528\u6b63\u5f26\u6ce2\u8fdb\u884c\u6d4b\u8bd5\uff0c\u4ee5\u83b7\u5f97\u9891\u57df\u54cd\u5e94\uff0c\u5e76\u901a\u8fc7\u7269\u7406\u5c42\u6d4b\u8bd5\u7cfb\u7edf\u8f6f\u4ef6\u5f97\u5230\u65f6\u57df\u54cd\u5e94\u3002<\/p>\n

2. \u4f7f\u7528\u77e2\u91cf\u7f51\u7edc\u5206\u6790\u4eea\uff08VNA\uff09<\/h2>\n

\u77e2\u91cf\u7f51\u7edc\u5206\u6790\u4eea\uff08VNA\uff09\u662f\u4e00\u79cd\u5173\u952e\u5de5\u5177\uff0c\u53ef\u5728\u9ad8\u8fbe\u51e0\u5341GHz\u7684\u9891\u7387\u8303\u56f4\u5185\u7cbe\u786e\u6d4b\u91cf\u4f20\u8f93\u901a\u9053\u5bf9\u4e0d\u540c\u9891\u7387\u7684\u6b63\u5f26\u6ce2\u7684\u53cd\u5c04\u548c\u4f20\u8f93\u7279\u6027\u3002\u5b83\u7684\u52a8\u6001\u8303\u56f4\u53ef\u8fbe100dB\u4ee5\u4e0a\uff0c\u56e0\u6b64\u5728\u9ad8\u901f\u4f20\u8f93\u901a\u9053\u5206\u6790\u4e2d\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002<\/p>\n

3. S\u53c2\u6570\u7684\u91cd\u8981\u6027<\/h2>\n

\u88ab\u6d4b\u7cfb\u7edf\u5bf9\u4e8e\u4e0d\u540c\u9891\u7387\u6b63\u5f26\u6ce2\u7684\u53cd\u5c04\u548c\u4f20\u8f93\u7279\u6027\u53ef\u4ee5\u7528S\u53c2\u6570\uff08S-parameter\uff09\u8868\u793a\u3002\u8fd9\u4e9b\u53c2\u6570\u63cf\u8ff0\u4e86\u88ab\u6d4b\u4ef6\u5bf9\u4e8e\u4e0d\u540c\u9891\u7387\u6b63\u5f26\u6ce2\u7684\u4f20\u8f93\u548c\u53cd\u5c04\u7279\u6027\u3002S\u53c2\u6570\u5bf9\u4e8e\u9884\u6d4b\u771f\u5b9e\u7684\u6570\u5b57\u4fe1\u53f7\u7ecf\u8fc7\u4f20\u8f93\u901a\u9053\u540e\u7684\u5f71\u54cd\u975e\u5e38\u91cd\u8981\uff0c\u56e0\u4e3a\u6570\u5b57\u4fe1\u53f7\u53ef\u4ee5\u88ab\u89c6\u4e3a\u7531\u4e0d\u540c\u9891\u7387\u7684\u6b63\u5f26\u6ce2\u7ec4\u6210\u3002<\/p>\n

4. \u5dee\u5206\u4f20\u8f93\u7ebf\u7684\u590d\u6742\u6027<\/h2>\n

\u5bf9\u4e8e\u5dee\u5206\u4f20\u8f93\u7ebf\u6765\u8bf4\uff0c\u60c5\u51b5\u66f4\u52a0\u590d\u6742\uff0c\u56e0\u4e3a\u5b83\u4eec\u5177\u67094\u4e2a\u7aef\u53e3\uff0c\u5171\u670916\u4e2aS\u53c2\u6570\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u4f7f\u75284\u7aef\u53e3\u6216\u66f4\u591a\u7aef\u53e3\u7684VNA\u5bf9\u5dee\u5206\u4f20\u8f93\u7ebf\u8fdb\u884c\u6d4b\u91cf\uff0c\u4ee5\u83b7\u53d6\u5176S\u53c2\u6570\u3002<\/p>\n

5. \u65f6\u57df\u53cd\u5c04\u6ce2\u5f62\u548c\u51b2\u51fb\u54cd\u5e94<\/h2>\n

\u901a\u8fc7\u5bf9S\u53c2\u6570\u8fdb\u884c\u53cdFFT\u53d8\u6362\uff0c\u6211\u4eec\u53ef\u4ee5\u83b7\u5f97\u66f4\u591a\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u901a\u8fc7\u53cdFFT\u53d8\u6362SDD11\u53c2\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u65f6\u57df\u7684\u53cd\u5c04\u6ce2\u5f62\uff08TDR\uff1aTime Domain Reflection\uff09\uff0c\u4ece\u800c\u4e86\u89e3\u88ab\u6d4b\u4f20\u8f93\u7ebf\u4e0a\u7684\u963b\u6297\u53d8\u5316\u60c5\u51b5\u3002\u6b64\u5916\uff0c\u5bf9SDD21\u53c2\u6570\u8fdb\u884c\u53cdFFT\u53d8\u6362\u53ef\u4ee5\u5f97\u5230\u5176\u51b2\u51fb\u54cd\u5e94\uff0c\u5e2e\u52a9\u9884\u6d4b\u4e0d\u540c\u6570\u636e\u901f\u7387\u7684\u6570\u5b57\u4fe1\u53f7\u5728\u4f20\u8f93\u901a\u9053\u4e2d\u7684\u6ce2\u5f62\u6216\u773c\u56fe\u3002<\/p>\n

\u4f7f\u7528\u77e2\u91cf\u7f51\u7edc\u5206\u6790\u4eea\uff08VNA\uff09\u5bf9\u6570\u5b57\u4fe1\u53f7\u7684\u4f20\u8f93\u901a\u9053\u8fdb\u884c\u6d4b\u91cf\uff0c\u7ed3\u5408\u65f6\u57df\u548c\u9891\u57df\u5206\u6790\uff0c\u53ef\u4ee5\u5e2e\u52a9\u5de5\u7a0b\u5e08\u5728\u65e9\u671f\u9636\u6bb5\u8bc6\u522b\u5e76\u89e3\u51b3\u4e0e\u80cc\u677f\u3001\u7535\u7f06\u3001\u8fde\u63a5\u5668\u548cPCB\u7b49\u6709\u5173\u7684\u95ee\u9898\uff0c\u800c\u4e0d\u5fc5\u7b49\u5230\u4fe1\u53f7\u51fa\u73b0\u95ee\u9898\u65f6\u624d\u91c7\u53d6\u5e94\u5bf9\u63aa\u65bd\u3002<\/p>\n

\n

Frequently Asked Questions<\/h2>\n

1. \u4ec0\u4e48\u662fPCB\u7684\u963b\u6297\u548c\u635f\u8017\uff1f<\/h3>\n

PCB\u7684\u963b\u6297\u548c\u635f\u8017\u662f\u6307\u5728\u9ad8\u901f\u4fe1\u53f7\u4f20\u8f93\u4e2d\uff0cPCB\u4e0a\u7535\u8def\u7684\u963b\u6297\u7279\u6027\u548c\u4fe1\u53f7\u635f\u5931\u60c5\u51b5\u3002<\/p>\n

2. \u4e3a\u4ec0\u4e48PCB\u7684\u963b\u6297\u548c\u635f\u8017\u5bf9\u9ad8\u901f\u4fe1\u53f7\u4f20\u8f93\u5982\u6b64\u91cd\u8981\uff1f<\/h3>\n

\u963b\u6297\u548c\u635f\u8017\u76f4\u63a5\u5f71\u54cd\u4fe1\u53f7\u7684\u4f20\u8f93\u8d28\u91cf\u548c\u7a33\u5b9a\u6027\uff0c\u5bf9\u4e8e\u9ad8\u901f\u6570\u636e\u4f20\u8f93\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

3. \u4ec0\u4e48\u662fS\u53c2\u6570\uff1f<\/h3>\n

S\u53c2\u6570\u662f\u4e00\u79cd\u63cf\u8ff0\u7535\u8def\u6216\u4f20\u8f93\u7ebf\u5bf9\u4e8e\u4e0d\u540c\u9891\u7387\u6b63\u5f26\u6ce2\u4f20\u8f93\u548c\u53cd\u5c04\u7279\u6027\u7684\u53c2\u6570\u3002\u5b83\u4eec\u7528\u4e8e\u5206\u6790\u7535\u8def\u548c\u4f20\u8f93\u7ebf\u7684\u6027\u80fd\u3002<\/p>\n

4. \u4e3a\u4ec0\u4e48\u9700\u8981\u4f7f\u7528\u77e2\u91cf\u7f51\u7edc\u5206\u6790\u4eea\uff08VNA\uff09\uff1f<\/h3>\n

VNA\u53ef\u4ee5\u5728\u5e7f\u6cdb\u7684\u9891\u7387\u8303\u56f4\u5185\u51c6\u786e\u6d4b\u91cfS\u53c2\u6570\uff0c\u5e2e\u52a9\u5de5\u7a0b\u5e08\u4e86\u89e3\u4f20\u8f93\u901a\u9053\u7684\u7279\u6027\u3002<\/p>\n

5. \u5982\u4f55\u4f7f\u7528\u65f6\u57df\u53cd\u5c04\u6ce2\u5f62\u548c\u51b2\u51fb\u54cd\u5e94\u5206\u6790\u4f20\u8f93\u901a\u9053\uff1f<\/h3>\n

\u901a\u8fc7\u5bf9S\u53c2\u6570\u8fdb\u884c\u53cdFFT\u53d8\u6362\uff0c\u53ef\u4ee5\u5c06\u9891\u57df\u4fe1\u606f\u8f6c\u6362\u4e3a\u65f6\u57df\u4fe1\u606f\uff0c\u4ece\u800c\u5206\u6790\u4f20\u8f93\u901a\u9053\u7684\u963b\u6297\u53d8\u5316\u548c\u6570\u5b57\u4fe1\u53f7\u7684\u6ce2\u5f62\u3002\u8fd9\u5bf9\u4e8e\u4f18\u5316\u4f20\u8f93\u901a\u9053\u975e\u5e38\u6709\u7528\u3002<\/p>","protected":false},"excerpt":{"rendered":"

PCB\uff08Printed Circuit Board\uff09\u7684\u963b\u6297\u548c\u635f\u8017\u5bf9\u4e8e\u9ad8\u901f\u4fe1\u53f7\u4f20\u8f93\u81f3\u5173\u91cd\u8981\u3002\u4e3a\u4e86\u6df1\u5165\u5206\u6790\u8fd9\u4e00\u590d\u6742 […]<\/p>\n","protected":false},"author":1,"featured_media":12191,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"slim_seo":{"title":"The Effects of PCB Impedance and Loss on Signals","description":"PCB\u963b\u6297\u548c\u635f\u8017\u600e\u4e48\u5f71\u54cd\u9ad8\u901f\u4fe1\u53f7\uff1f\u8bb2\u6e05\u51b2\u51fb\u54cd\u5e94\u3001S\u53c2\u6570\u4e0e\u5dee\u5206\u4f20\u8f93\u7ebf\u7684\u6d4b\u8bd5\u65b9\u6cd5\uff0c\u4ee5\u53ca\u77e2\u91cf\u7f51\u7edc\u5206\u6790\u4eea\u4f7f\u7528\u65f6\u7684\u6821\u51c6\u8981\u70b9\u3002"},"_slim_seo_primary_term_category":0,"_slim_seo_primary_term_post_tag":0,"footnotes":""},"categories":[26],"tags":[],"class_list":["post-2557","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/2557","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/comments?post=2557"}],"version-history":[{"count":1,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/2557\/revisions"}],"predecessor-version":[{"id":19264,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/posts\/2557\/revisions\/19264"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media\/12191"}],"wp:attachment":[{"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/media?parent=2557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/categories?post=2557"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jingpengpcb.com\/en\/wp-json\/wp\/v2\/tags?post=2557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}