\u3000\u3000\u529f\u7387\u589e\u76ca\u662f\u7535\u8def\u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u63cf\u8ff0\u4e86\u4fe1\u53f7\u5728\u7535\u8def\u4e2d\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u653e\u5927\u7a0b\u5ea6\u3002\u529f\u7387\u589e\u76ca\u901a\u5e38\u7528dB(\u5206\u8d1d)\u8868\u793a\uff0c\u5b83\u662f\u4e00\u4e2a\u5bf9\u6570\u5355\u4f4d\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u5730\u7406\u89e3\u7535\u8def\u7684\u653e\u5927\u6548\u679c\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u529f\u7387\u589e\u76cadb\u7684\u542b\u4e49\u548c\u5e94\u7528\u3002<\/p>\n\n\n\n
\u3000\u3000\u529f\u7387\u589e\u76ca\u662f\u6307\u4fe1\u53f7\u5728\u7535\u8def\u4e2d\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u653e\u5927\u7a0b\u5ea6\uff0c\u5b83\u662f\u8f93\u5165\u529f\u7387\u4e0e\u8f93\u51fa\u529f\u7387\u4e4b\u6bd4\u3002\u529f\u7387\u589e\u76ca\u901a\u5e38\u7528dB(\u5206\u8d1d)\u8868\u793a\uff0c\u8fd9\u662f\u4e00\u4e2a\u5bf9\u6570\u5355\u4f4d\uff0c\u7528\u6765\u8868\u8fbe\u4e24\u4e2a\u529f\u7387\u4e4b\u95f4\u7684\u6bd4\u503c\u3002\u5206\u8d1d\u7684\u5b9a\u4e49\u662f10\u500d\u4e8e\u4ee5\u81ea\u7136\u6570e\u4e3a\u5e95\u7684\u5bf9\u6570\uff0c\u5373\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\u529f\u7387\u589e\u76ca\uff0cPout\u8868\u793a\u8f93\u51fa\u529f\u7387\uff0cPin\u8868\u793a\u8f93\u5165\u529f\u7387\u3002\u901a\u8fc7\u8fd9\u4e2a\u516c\u5f0f\uff0c\u6211\u4eec\u53ef\u4ee5\u8ba1\u7b97\u51fa\u7535\u8def\u7684\u529f\u7387\u589e\u76ca\uff0c\u4ee5\u53ca\u7535\u8def\u7684\u653e\u5927\u6548\u679c\u3002<\/p>\n\n\n\n \u3000\u3000\u529f\u7387\u589e\u76ca\u662f\u7535\u8def\u8bbe\u8ba1\u548c\u5206\u6790\u4e2d\u975e\u5e38\u91cd\u8981\u7684\u53c2\u6570\u3002\u5728\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u6211\u4eec\u9700\u8981\u9009\u62e9\u5408\u9002\u7684\u653e\u5927\u5668\u6765\u6ee1\u8db3\u7279\u5b9a\u7684\u9700\u6c42\uff0c\u6bd4\u5982\u653e\u5927\u5668\u7684\u589e\u76ca\u3001\u5e26\u5bbd\u3001\u566a\u58f0\u7b49\u53c2\u6570\u3002\u5728\u5206\u6790\u7535\u8def\u6027\u80fd\u65f6\uff0c\u6211\u4eec\u9700\u8981\u8ba1\u7b97\u7535\u8def\u7684\u589e\u76ca\u3001\u8f93\u5165\u8f93\u51fa\u963b\u6297\u3001\u566a\u58f0\u7b49\u53c2\u6570\u3002\u56e0\u6b64\uff0c\u529f\u7387\u589e\u76ca\u662f\u7535\u8def\u8bbe\u8ba1\u548c\u5206\u6790\u4e2d\u5fc5\u987b\u638c\u63e1\u7684\u6982\u5ff5\u3002<\/p>\n\n\n\n \u3000\u3000\u529f\u7387\u589e\u76ca\u4e5f\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u4e2d\u3002\u5728\u65e0\u7ebf\u901a\u4fe1\u4e2d\uff0c\u4fe1\u53f7\u9700\u8981\u7ecf\u8fc7\u4e00\u7cfb\u5217\u7684\u653e\u5927\u5668\u3001\u6ee4\u6ce2\u5668\u3001\u6df7\u9891\u5668\u7b49\u7535\u8def\uff0c\u4ee5\u8fbe\u5230\u4f20\u8f93\u7684\u8981\u6c42\u3002\u529f\u7387\u589e\u76ca\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u8bc4\u4f30\u7535\u8def\u7684\u653e\u5927\u6548\u679c\uff0c\u4ee5\u53ca\u786e\u5b9a\u4fe1\u53f7\u7684\u4f20\u8f93\u8ddd\u79bb\u548c\u8d28\u91cf\u3002\u56e0\u6b64\uff0c\u529f\u7387\u589e\u76ca\u662f\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u53c2\u6570\u3002<\/p>\n\n\n\n \u3000\u3000\u5728\u7535\u8def\u8bbe\u8ba1\u4e2d\uff0c\u6211\u4eec\u901a\u5e38\u9700\u8981\u63d0\u9ad8\u529f\u7387\u589e\u76ca\u6765\u6ee1\u8db3\u7279\u5b9a\u7684\u9700\u6c42\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8\u529f\u7387\u589e\u76ca\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n \u3000\u3000\u529f\u7387\u589e\u76ca\u662f\u7535\u8def\u4e2d\u4e00\u4e2a\u91cd\u8981\u7684\u53c2\u6570\uff0c\u5b83\u63cf\u8ff0\u4e86\u4fe1\u53f7\u5728\u7535\u8def\u4e2d\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u7684\u653e\u5927\u7a0b\u5ea6\u3002\u529f\u7387\u589e\u76ca\u901a\u5e38\u7528dB(\u5206\u8d1d)\u8868\u793a\uff0c\u5b83\u662f\u4e00\u4e2a\u5bf9\u6570\u5355\u4f4d\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u66f4\u597d\u5730\u7406\u89e3\u7535\u8def\u7684\u653e\u5927\u6548\u679c\u3002<\/strong>\u5728\u7535\u8def\u8bbe\u8ba1\u548c\u5206\u6790\u4e2d\uff0c\u529f\u7387\u589e\u76ca\u662f\u5fc5\u987b\u638c\u63e1\u7684\u6982\u5ff5\u3002\u901a\u8fc7\u9009\u62e9\u5408\u9002\u7684\u653e\u5927\u5668\u3001\u4f18\u5316\u7535\u8def\u7ed3\u6784\u548c\u5143\u5668\u4ef6\u53c2\u6570\u3001\u964d\u4f4e\u566a\u58f0\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u7535\u8def\u7684\u529f\u7387\u589e\u76ca\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" 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\u3000\u3000\u4e09\u3001\u5982\u4f55\u63d0\u9ad8\u529f\u7387\u589e\u76cadb<\/h2>\n\n\n\n
\n
\u3000\u3000\u56db\u3001\u603b\u7ed3<\/h2>\n\n\n\n