{"id":9794,"date":"2023-08-15T21:54:06","date_gmt":"2023-08-15T13:54:06","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=9794"},"modified":"2023-08-15T21:54:10","modified_gmt":"2023-08-15T13:54:10","slug":"txzydhdyqbm","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/9794.html","title":{"rendered":"\u5929\u7ebf\u589e\u76cadb\u548cdbi\u6709\u533a\u522b\u5417\uff1f"},"content":{"rendered":"\n

\u3000\u3000\u5728\u73b0\u4ee3\u901a\u4fe1\u9886\u57df\u4e2d\uff0c\u5929\u7ebf\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u5143\u4ef6\uff0c\u5b83\u4eec\u5728\u65e0\u7ebf\u901a\u4fe1\u548c\u7535\u78c1\u6ce2\u4f20\u8f93\u4e2d\u8d77\u7740\u81f3\u5173\u91cd\u8981\u7684\u4f5c\u7528\u3002\u5929\u7ebf\u7684\u6027\u80fd\u8bc4\u4f30\u6307\u6807\u4e4b\u4e00\u662f\u589e\u76ca\uff0c\u800c\u5728\u8ba8\u8bba\u5929\u7ebf\u589e\u76ca\u65f6\uff0c\u7ecf\u5e38\u4f1a\u542c\u5230\u4e24\u4e2a\u672f\u8bed\uff1adb\u548cDBI\u3002<\/strong>\u90a3\u4e48\uff0c\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u4e4b\u95f4\u6709\u4ec0\u4e48\u533a\u522b\u5462?\u672c\u6587\u5c06\u8be6\u7ec6\u89e3\u91ca\u8fd9\u4e24\u4e2a\u6982\u5ff5\uff0c\u5e76\u63a2\u8ba8\u5b83\u4eec\u5728\u5929\u7ebf\u8bbe\u8ba1\u548c\u6027\u80fd\u8bc4\u4f30\u4e2d\u7684\u5e94\u7528\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e00\u3001\u5929\u7ebf\u589e\u76ca(db)\u7684\u6982\u5ff5\u548c\u5e94\u7528\uff1a<\/h2>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca\u662f\u8861\u91cf\u5929\u7ebf\u8f90\u5c04\u80fd\u529b\u7684\u6307\u6807\uff0c\u5b83\u8868\u793a\u5929\u7ebf\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf(\u4e5f\u79f0\u4e3a\u7b49\u6548\u70b9\u6e90)\u7684\u8f90\u5c04\u80fd\u529b\u3002\u5929\u7ebf\u589e\u76ca\u901a\u5e38\u4ee5db(\u5206\u8d1d)\u4e3a\u5355\u4f4d\u8868\u793a\uff0cdb\u662f\u4e00\u79cd\u5bf9\u6570\u5355\u4f4d\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e24\u4e2a\u529f\u7387\u6216\u80fd\u91cf\u4e4b\u95f4\u7684\u6bd4\u503c\u3002\u5929\u7ebf\u589e\u76ca(db)\u53ef\u4ee5\u7528\u4ee5\u4e0b\u516c\u5f0f\u8868\u793a\uff1a<\/p>\n\n\n\n

\u3000\u3000G(db) = 10log10(Pout\/Pin)<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cG(db)\u8868\u793a\u5929\u7ebf\u589e\u76ca\uff0cPout\u8868\u793a\u5929\u7ebf\u7684\u8f90\u5c04\u529f\u7387\uff0cPin\u8868\u793a\u8f93\u5165\u5230\u5929\u7ebf\u7684\u7535\u529f\u7387\u3002<\/p>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca(db)\u662f\u4e00\u4e2a\u6b63\u503c\uff0c\u5b83\u8868\u793a\u5929\u7ebf\u8f90\u5c04\u80fd\u529b\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u589e\u5f3a\u7a0b\u5ea6\u3002\u5929\u7ebf\u589e\u76ca(db)\u7684\u503c\u8d8a\u5927\uff0c\u5929\u7ebf\u7684\u8f90\u5c04\u80fd\u529b\u5c31\u8d8a\u5f3a\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u5929\u7ebf\u589e\u76ca(db)\u5e38\u5e38\u4e0e\u4fe1\u53f7\u4f20\u8f93\u8ddd\u79bb\u548c\u63a5\u6536\u7075\u654f\u5ea6\u5bc6\u5207\u76f8\u5173\u3002\u8f83\u9ad8\u7684\u5929\u7ebf\u589e\u76ca(db)\u53ef\u4ee5\u63d0\u9ad8\u4fe1\u53f7\u4f20\u8f93\u8ddd\u79bb\uff0c\u540c\u65f6\u4e5f\u53ef\u4ee5\u63d0\u9ad8\u63a5\u6536\u7075\u654f\u5ea6\uff0c\u4f7f\u5f97\u63a5\u6536\u7aef\u80fd\u591f\u63a5\u6536\u5230\u8f83\u8fdc\u8ddd\u79bb\u7684\u4fe1\u53f7\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e8c\u3001DBI\u7684\u6982\u5ff5\u548c\u5e94\u7528\uff1a<\/h2>\n\n\n\n

\u3000\u3000DBI(dBi)\u662f\u5929\u7ebf\u589e\u76ca\u7684\u53e6\u4e00\u79cd\u5e38\u7528\u5355\u4f4d\u3002\u4e0e\u5929\u7ebf\u589e\u76ca(db)\u76f8\u6bd4\uff0cDBI\u662f\u4ee5\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u4f5c\u4e3a\u53c2\u8003\uff0c\u4ee5\u5206\u8d1d\u4e3a\u5355\u4f4d\u8868\u793a\u7684\u5929\u7ebf\u589e\u76ca\u3002DBI\u7684\u8ba1\u7b97\u516c\u5f0f\u5982\u4e0b\uff1a<\/p>\n\n\n\n

\u3000\u3000G(dBi) = G(db) + 2.15<\/strong><\/p>\n\n\n\n

\u3000\u3000\u5176\u4e2d\uff0cG(dBi)\u8868\u793a\u4ee5DBI\u4e3a\u5355\u4f4d\u7684\u5929\u7ebf\u589e\u76ca\u3002<\/p>\n\n\n\n

\u3000\u3000DBI\u662f\u4e00\u4e2a\u76f8\u5bf9\u5355\u4f4d\uff0c\u5b83\u8868\u793a\u5929\u7ebf\u8f90\u5c04\u80fd\u529b\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u589e\u5f3a\u7a0b\u5ea6\u3002\u4e0e\u5929\u7ebf\u589e\u76ca(db)\u76f8\u6bd4\uff0cDBI\u7684\u503c\u901a\u5e38\u8981\u59272.15\u5206\u8d1d\u3002\u56e0\u6b64\uff0c\u540c\u6837\u7684\u5929\u7ebf\u589e\u76ca(db)\u503c\uff0c\u5728DBI\u5355\u4f4d\u4e0b\u7684\u503c\u8981\u6bd4\u5728db\u5355\u4f4d\u4e0b\u7684\u503c\u59272.15\u5206\u8d1d\u3002DBI\u7684\u5f15\u5165\u4e3b\u8981\u662f\u4e3a\u4e86\u4f7f\u5f97\u5929\u7ebf\u589e\u76ca\u7684\u503c\u66f4\u52a0\u76f4\u89c2\u548c\u6613\u4e8e\u7406\u89e3\u3002<\/p>\n\n\n\n

\u3000\u3000\u4e09\u3001\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u7684\u533a\u522b\uff1a<\/h2>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u90fd\u662f\u7528\u6765\u8861\u91cf\u5929\u7ebf\u8f90\u5c04\u80fd\u529b\u7684\u6307\u6807\uff0c\u5b83\u4eec\u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\u5355\u4f4d\u548c\u53c2\u8003\u70b9\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n

\u3000\u30001. \u5355\u4f4d\u7684\u533a\u522b\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca(db)\u4ee5db\u4e3a\u5355\u4f4d\u8868\u793a\uff0c\u800cDBI\u4ee5dBi\u4e3a\u5355\u4f4d\u8868\u793a\u3002\u867d\u7136\u5b83\u4eec\u90fd\u662f\u5bf9\u6570\u5355\u4f4d\uff0c\u4f46DBI\u7684\u503c\u901a\u5e38\u8981\u6bd4db\u7684\u503c\u59272.15\u5206\u8d1d\u3002<\/p>\n\n\n\n

\u3000\u30002. \u53c2\u8003\u70b9\u7684\u533a\u522b\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca(db)\u662f\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u8f90\u5c04\u80fd\u529b\u589e\u5f3a\u7a0b\u5ea6\uff0c\u800cDBI\u662f\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u8f90\u5c04\u80fd\u529b\u589e\u5f3a\u7a0b\u5ea6\u518d\u52a0\u4e0a2.15\u5206\u8d1d\u3002\u4e5f\u5c31\u662f\u8bf4\uff0cDBI\u662f\u76f8\u5bf9\u4e8e\u5929\u7ebf\u589e\u76ca(db)\u7684\u503c\u518d\u505a\u4e86\u4e00\u4e2a\u4fee\u6b63\u3002<\/p>\n\n\n\n

\u3000\u3000\u56db\u3001\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u7684\u5e94\u7528\uff1a<\/h2>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u5728\u5929\u7ebf\u8bbe\u8ba1\u548c\u6027\u80fd\u8bc4\u4f30\u4e2d\u90fd\u6709\u91cd\u8981\u7684\u5e94\u7528\u3002<\/p>\n\n\n\n

\u3000\u30001. \u5929\u7ebf\u8bbe\u8ba1\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u8bbe\u8ba1\u65f6\uff0c\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u53ef\u4ee5\u4f5c\u4e3a\u8861\u91cf\u5929\u7ebf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\u3002\u6839\u636e\u5e94\u7528\u9700\u6c42\uff0c\u9009\u62e9\u5408\u9002\u7684\u5929\u7ebf\u589e\u76ca(db)\u6216DBI\u503c\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8f83\u8fdc\u8ddd\u79bb\u7684\u4fe1\u53f7\u4f20\u8f93\u548c\u8f83\u9ad8\u7684\u63a5\u6536\u7075\u654f\u5ea6\u3002<\/p>\n\n\n\n

\u3000\u30002. \u6027\u80fd\u8bc4\u4f30\uff1a<\/h3>\n\n\n\n

\u3000\u3000\u5728\u5bf9\u5929\u7ebf\u8fdb\u884c\u6027\u80fd\u8bc4\u4f30\u65f6\uff0c\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u53ef\u4ee5\u7528\u6765\u6bd4\u8f83\u4e0d\u540c\u5929\u7ebf\u7684\u8f90\u5c04\u80fd\u529b\u3002\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u8f83\u9ad8\u7684\u5929\u7ebf\u589e\u76ca(db)\u6216DBI\u503c\u8868\u793a\u8f83\u597d\u7684\u5929\u7ebf\u6027\u80fd\u3002<\/p>\n\n\n\n

\u3000\u3000\u7ed3\u8bba\uff1a<\/h2>\n\n\n\n

\u3000\u3000\u5929\u7ebf\u589e\u76ca(db)\u548cDBI\u662f\u8861\u91cf\u5929\u7ebf\u8f90\u5c04\u80fd\u529b\u7684\u91cd\u8981\u6307\u6807\uff0c\u5b83\u4eec\u5728\u5929\u7ebf\u8bbe\u8ba1\u548c\u6027\u80fd\u8bc4\u4f30\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002\u5929\u7ebf\u589e\u76ca(db)\u4ee5db\u4e3a\u5355\u4f4d\u8868\u793a\uff0c\u8868\u793a\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u8f90\u5c04\u80fd\u529b\u589e\u5f3a\u7a0b\u5ea6;\u800cDBI\u4ee5dBi\u4e3a\u5355\u4f4d\u8868\u793a\uff0c\u8868\u793a\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u8f90\u5c04\u80fd\u529b\u589e\u5f3a\u7a0b\u5ea6\u518d\u52a0\u4e0a2.15\u5206\u8d1d\u3002<\/strong>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6839\u636e\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u5929\u7ebf\u589e\u76ca(db)\u6216DBI\u503c\uff0c\u53ef\u4ee5\u5b9e\u73b0\u8f83\u8fdc\u8ddd\u79bb\u7684\u4fe1\u53f7\u4f20\u8f93\u548c\u8f83\u9ad8\u7684\u63a5\u6536\u7075\u654f\u5ea6\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

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