{"id":5878,"date":"2023-07-07T10:06:54","date_gmt":"2023-07-07T02:06:54","guid":{"rendered":"https:\/\/www.techphant.cn\/?p=5878"},"modified":"2023-07-07T10:06:57","modified_gmt":"2023-07-07T02:06:57","slug":"txzydhdysqb","status":"publish","type":"post","link":"https:\/\/www.techphant.cn\/blog\/5878.html","title":{"rendered":"\u5929\u7ebf\u589e\u76cadbl\u548cdbi\u6709\u5565\u533a\u522b\uff1f"},"content":{"rendered":"\n<p>\u3000\u3000<strong><a href=\"https:\/\/baike.baidu.com\/item\/%E5%A4%A9%E7%BA%BF%E5%A2%9E%E7%9B%8A\/5814326\" target=\"_blank\" data-type=\"URL\" data-id=\"https:\/\/baike.baidu.com\/item\/%E5%A4%A9%E7%BA%BF%E5%A2%9E%E7%9B%8A\/5814326\" rel=\"noreferrer noopener nofollow\">\u5929\u7ebf\u589e\u76ca<\/a><\/strong>\u662f\u8861\u91cf\u5929\u7ebf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\u3002\u5728\u5929\u7ebf\u9886\u57df\uff0c\u5e38\u7528\u7684\u4e24\u4e2a\u589e\u76ca\u5355\u4f4d\u662fdBi\u548cdBd\u3002\u867d\u7136\u5b83\u4eec\u90fd\u662f\u7528\u6765\u8868\u793a\u5929\u7ebf\u589e\u76ca\u7684\u5355\u4f4d\uff0c\u4f46\u5b83\u4eec\u4e4b\u95f4\u5b58\u5728\u4e00\u4e9b\u533a\u522b\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u9996\u5148\uff0cdBi\u662f\u6307\u5929\u7ebf\u589e\u76ca\u76f8\u5bf9\u4e8e\u4e00\u4e2a\u7406\u60f3\u7684\u540c\u5411\u8f90\u5c04\u5668\u7684\u589e\u76ca\u3002\u8fd9\u4e2a\u7406\u60f3\u7684\u540c\u5411\u8f90\u5c04\u5668\u662f\u4e00\u4e2a\u6ca1\u6709\u8f90\u5c04\u635f\u8017\u7684\u70b9\u6e90\uff0c\u5b83\u5728\u6240\u6709\u65b9\u5411\u4e0a\u90fd\u6709\u5747\u5300\u7684\u8f90\u5c04\u3002\u56e0\u6b64\uff0cdBi\u5b9e\u9645\u4e0a\u662f\u4e00\u79cd\u76f8\u5bf9\u6bd4\u8f83\u6807\u51c6\u7684\u589e\u76ca\u5355\u4f4d\uff0c\u7528\u4e8e\u6bd4\u8f83\u4e0d\u540c\u5929\u7ebf\u4e4b\u95f4\u7684\u6027\u80fd\u5dee\u5f02\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u800cdBd\u662f\u4e00\u79cd\u76f8\u5bf9\u4e8e\u6807\u51c6\u5076\u6781\u5b50\u5929\u7ebf\u7684\u589e\u76ca\u5355\u4f4d\u3002\u6807\u51c6\u5076\u6781\u5b50\u5929\u7ebf\u662f\u4e00\u79cd\u7406\u60f3\u7684\u53c2\u8003\u5929\u7ebf\uff0c\u5b83\u7684\u589e\u76ca\u88ab\u5b9a\u4e49\u4e3a0 dBd\u3002\u56e0\u6b64\uff0cdBd\u662f\u4e00\u79cd\u76f8\u5bf9\u4e8e\u6807\u51c6\u5929\u7ebf\u7684\u589e\u76ca\u6d4b\u91cf\uff0c\u7528\u4e8e\u6bd4\u8f83\u5929\u7ebf\u4e0e\u6807\u51c6\u5929\u7ebf\u4e4b\u95f4\u7684\u6027\u80fd\u5dee\u5f02\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u533a\u522b\u5728\u4e8e\uff0cdBi\u662f\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u589e\u76ca\u6d4b\u91cf\uff0c\u800cdBd\u662f\u76f8\u5bf9\u4e8e\u6807\u51c6\u5076\u6781\u5b50\u5929\u7ebf\u7684\u589e\u76ca\u6d4b\u91cf\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cdBi\u901a\u5e38\u7528\u4e8e\u6bd4\u8f83\u4e0d\u540c\u5929\u7ebf\u4e4b\u95f4\u7684\u6027\u80fd\u5dee\u5f02\uff0c\u800cdBd\u5219\u7528\u4e8e\u6bd4\u8f83\u5929\u7ebf\u4e0e\u6807\u51c6\u5929\u7ebf\u4e4b\u95f4\u7684\u6027\u80fd\u5dee\u5f02\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c<strong>\u867d\u7136dBi\u548cdBd\u90fd\u662f\u589e\u76ca\u5355\u4f4d\uff0c\u4f46\u5b83\u4eec\u7684\u6570\u503c\u5e76\u4e0d\u76f8\u7b49\u3002\u4e00\u822c\u6765\u8bf4\uff0cdBi\u7684\u6570\u503c\u8981\u6bd4dBd\u7684\u6570\u503c\u5927\u7ea62.15<\/strong>\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u5929\u7ebf\u589e\u76ca\u7684\u8ba1\u7b97\u516c\u5f0f\u662f\uff1a<\/p>\n\n\n\n<p>\u3000\u3000<strong>\u589e\u76ca(dBi)= 10 * log10(\u8f90\u5c04\u529f\u7387\/\u8f93\u5165\u529f\u7387)<\/strong><\/p>\n\n\n\n<p>\u3000\u3000<strong>\u589e\u76ca(dBd)= \u589e\u76ca(dBi)+ 2.15<\/strong><\/p>\n\n\n\n<p>\u3000\u3000\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9009\u62e9\u4f7f\u7528dBi\u8fd8\u662fdBd\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u5e94\u7528\u573a\u666f\u3002\u5982\u679c\u9700\u8981\u4e0e\u6807\u51c6\u5929\u7ebf\u8fdb\u884c\u6bd4\u8f83\uff0c\u5219\u4f7f\u7528dBd\u66f4\u4e3a\u5408\u9002;\u5982\u679c\u9700\u8981\u6bd4\u8f83\u4e0d\u540c\u5929\u7ebf\u4e4b\u95f4\u7684\u6027\u80fd\u5dee\u5f02\uff0c\u5219\u4f7f\u7528dBi\u66f4\u4e3a\u5408\u9002\u3002<\/p>\n\n\n\n<p>\u3000\u3000\u603b\u7ed3\u8d77\u6765\uff0cdBi\u548cdBd\u90fd\u662f\u8861\u91cf\u5929\u7ebf\u589e\u76ca\u7684\u5355\u4f4d\uff0c\u533a\u522b\u5728\u4e8e\u53c2\u8003\u70b9\u7684\u4e0d\u540c\u3002dBi\u662f\u76f8\u5bf9\u4e8e\u7406\u60f3\u70b9\u6e90\u5929\u7ebf\u7684\u589e\u76ca\u6d4b\u91cf\uff0cdBd\u662f\u76f8\u5bf9\u4e8e\u6807\u51c6\u5076\u6781\u5b50\u5929\u7ebf\u7684\u589e\u76ca\u6d4b\u91cf\u3002\u9009\u62e9\u4f7f\u7528\u54ea\u79cd\u5355\u4f4d\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u9700\u6c42\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5929\u7ebf\u589e\u76ca\u662f\u8861\u91cf\u5929\u7ebf\u6027\u80fd\u7684\u91cd\u8981\u6307\u6807\u4e4b\u4e00\u3002\u5728\u5929\u7ebf\u9886\u57df\uff0c\u5e38\u7528\u7684\u4e24\u4e2a\u589e\u76ca\u5355\u4f4d\u662fdBi\u548cdBd\u3002\u867d\u7136\u5b83\u4eec\u90fd\u662f\u7528\u6765\u8868\u793a\u5929\u7ebf\u589e\u76ca\u7684\u5355\u4f4d\uff0c\u4f46\u5b83\u4eec\u4e4b\u95f4\u5b58\u5728\u4e00\u4e9b\u533a\u522b\u3002<\/p>\n","protected":false},"author":1,"featured_media":3671,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"default","ast-global-header-display":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","footnotes":""},"categories":[36],"tags":[52],"class_list":["post-5878","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-wxtx"],"_links":{"self":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/5878","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/comments?post=5878"}],"version-history":[{"count":0,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/posts\/5878\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media\/3671"}],"wp:attachment":[{"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/media?parent=5878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/categories?post=5878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.techphant.cn\/wp-json\/wp\/v2\/tags?post=5878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}