{"id":209215,"date":"2024-03-21T14:06:39","date_gmt":"2024-03-21T14:06:39","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e3%82%a2%e3%83%b3%e3%83%86%e3%83%8a%e5%88%a9%e5%be%97%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95-%e7%94%a8%e9%80%94\/"},"modified":"2024-05-17T15:08:59","modified_gmt":"2024-05-17T15:08:59","slug":"%e3%82%a2%e3%83%b3%e3%83%86%e3%83%8a%e5%88%a9%e5%be%97%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95-%e7%94%a8%e9%80%94","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e3%82%a2%e3%83%b3%e3%83%86%e3%83%8a%e5%88%a9%e5%be%97%e3%81%ae%e5%85%ac%e5%bc%8f-%e5%ae%9a%e7%be%a9%e3%80%81%e8%a8%88%e7%ae%97%e6%96%b9%e6%b3%95-%e7%94%a8%e9%80%94\/","title":{"rendered":"\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5 &#038; \u7528\u9014"},"content":{"rendered":"<p class=\"sidekick\">\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u304a\u3088\u3073\u901a\u4fe1\u3001\u885b\u661f\u3001\u30ec\u30fc\u30c0\u30fc\u3001\u822a\u7a7a\u6a5f\u306a\u3069\u306e\u5b9f\u7528\u7684\u306a\u7528\u9014\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5 &#038; \u7528\u9014<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u901a\u4fe1\u3084\u7121\u7dda\u6280\u8853\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3059\u3002\u672c\u8a18\u4e8b\u3067\u306f\u3001\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u57fa\u672c\u7684\u306a\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u305d\u3057\u3066\u305d\u306e\u7528\u9014\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u5b9a\u7fa9<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\uff08Antenna Gain\uff09\u306f\u3001\u7279\u5b9a\u306e\u65b9\u5411\u306b\u304a\u3051\u308b\u30a2\u30f3\u30c6\u30ca\u306e\u653e\u5c04\u52b9\u7387\u3092\u793a\u3059\u6307\u6a19\u3067\u3059\u3002\u3053\u308c\u306f\u901a\u5e38\u3001\u7121\u6307\u5411\u6027\u30a2\u30f3\u30c6\u30ca\u306b\u5bfe\u3059\u308b\u6bd4\u8f03\u3067\u8868\u3055\u308c\u307e\u3059\u3002\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u30c7\u30b7\u30d9\u30eb\uff08dB\uff09\u3067\u8868\u3055\u308c\u3001\u591a\u304f\u306e\u5834\u5408\u3001\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p><math><mrow><mi>G<\/mi> = 10 \\log_{10}\\left(\\frac{P_{out}}{P_{ref}}\\right) [dBi]<\/mrow><\/math><\/p>\n<p>\u3053\u3053\u3067\u3001<em>G<\/em>\u306f\u5229\u5f97\u3001<em>P_{out}<\/em>\u306f\u5bfe\u8c61\u30a2\u30f3\u30c6\u30ca\u306e\u7279\u5b9a\u65b9\u5411\u3078\u306e\u653e\u5c04\u30d1\u30ef\u30fc\u3001<em>P_{ref}<\/em>\u306f\u57fa\u6e96\u30a2\u30f3\u30c6\u30ca\u306e\u7121\u6307\u5411\u6027\u653e\u5c04\u30d1\u30ef\u30fc\u3067\u3059\u3002dBi\u306f\u7121\u6307\u5411\u6027\u30a2\u30f3\u30c6\u30ca\u306b\u5bfe\u3059\u308b\u5229\u5f97\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u8a08\u7b97\u65b9\u6cd5<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u4ee5\u4e0b\u306e\u30b9\u30c6\u30c3\u30d7\u3067\u8a08\u7b97\u3055\u308c\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>\u653e\u5c04\u5f37\u5ea6\u306e\u6e2c\u5b9a\uff1a<\/strong>\u30a2\u30f3\u30c6\u30ca\u306e\u7279\u5b9a\u306e\u65b9\u5411\u306b\u304a\u3051\u308b\u653e\u5c04\u5f37\u5ea6\u3092\u6e2c\u5b9a\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u57fa\u6e96\u30a2\u30f3\u30c6\u30ca\u306e\u653e\u5c04\u5f37\u5ea6\u3068\u306e\u6bd4\u8f03\uff1a<\/strong>\u7121\u6307\u5411\u6027\u30a2\u30f3\u30c6\u30ca\u306e\u653e\u5c04\u5f37\u5ea6\u3068\u6bd4\u8f03\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u30c7\u30b7\u30d9\u30eb\u306b\u5909\u63db\uff1a<\/strong>\u30c7\u30b7\u30d9\u30eb\u3092\u7528\u3044\u3066\u6bd4\u8f03\u3092\u884c\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u5177\u4f53\u7684\u306a\u8a08\u7b97\u5f0f\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<p><math><mrow><mi>G\\left(\\theta,\\phi\\right) = \\frac{4\\pi\\int_0^{2\\pi}\\int_0^{\\pi}U\\left(\\theta,\\phi\\right)\\sin\\theta \\,d\\theta d\\phi}{P_{total}} [dBi]<\/mrow><\/math><\/p>\n<p>\u3053\u3053\u3067\u3001<em>U(\\theta, \\phi)<\/em>\u306f\u89d2\u5ea6<em>\\theta<\/em>\u3068<em>\\phi<\/em>\u306b\u304a\u3051\u308b\u653e\u5c04\u5f37\u5ea6\u3001<em>P_{total}<\/em>\u306f\u30a2\u30f3\u30c6\u30ca\u5168\u4f53\u306e\u653e\u5c04\u30d1\u30ef\u30fc\u3067\u3059\u3002<\/p>\n<h2>\u7528\u9014<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u591a\u304f\u306e\u5b9f\u7528\u7684\u306a\u7528\u9014\u304c\u3042\u308a\u307e\u3059\u3002\u7279\u306b\u6b21\u306e\u3088\u3046\u306a\u5206\u91ce\u3067\u91cd\u8981\u3067\u3059\uff1a<\/p>\n<ul>\n<li><strong>\u901a\u4fe1\uff1a<\/strong>\u643a\u5e2f\u96fb\u8a71\u57fa\u5730\u5c40\u3084Wi-Fi\u30eb\u30fc\u30bf\u30fc\u306a\u3069\u3067\u9ad8\u3044\u5229\u5f97\u304c\u5fc5\u8981\u3068\u3055\u308c\u307e\u3059\u3002<\/li>\n<li><strong>\u885b\u661f\u901a\u4fe1\uff1a<\/strong>\u5730\u4e0a\u5c40\u304b\u3089\u885b\u661f\u3078\u306e\u4fe1\u53f7\u9001\u4fe1\u3084\u3001\u885b\u661f\u304b\u3089\u5730\u4e0a\u3078\u306e\u4fe1\u53f7\u53d7\u4fe1\u306b\u304a\u3044\u3066\u3001\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u6975\u3081\u3066\u91cd\u8981\u3067\u3059\u3002<\/li>\n<li><strong>\u30ec\u30fc\u30c0\u30fc\u6280\u8853\uff1a<\/strong>\u30ec\u30fc\u30c0\u30fc\u306f\u5bfe\u8c61\u7269\u306e\u4f4d\u7f6e\u3084\u901f\u5ea6\u3092\u9ad8\u7cbe\u5ea6\u3067\u6e2c\u5b9a\u3059\u308b\u305f\u3081\u306b\u9ad8\u5229\u5f97\u30a2\u30f3\u30c6\u30ca\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u822a\u7a7a\u6a5f\u901a\u4fe1\uff1a<\/strong>\u822a\u7a7a\u6a5f\u5185\u90e8\u304a\u3088\u3073\u5730\u4e0a\u3068\u306e\u901a\u4fe1\u306b\u304a\u3044\u3066\u3082\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u91cd\u8981\u3067\u3059\u3002<\/li>\n<\/ul>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306f\u7121\u7dda\u6280\u8853\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u3059\u3002\u305d\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u304a\u3088\u3073\u5b9f\u7528\u7684\u306a\u7528\u9014\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u306f\u3001\u7121\u7dda\u901a\u4fe1\u6280\u8853\u306e\u52b9\u679c\u7684\u306a\u904b\u7528\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u3092\u6b63\u3057\u304f\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u96fb\u6ce2\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30a2\u30f3\u30c6\u30ca\u5229\u5f97\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u304a\u3088\u3073\u901a\u4fe1\u3001\u885b\u661f\u3001\u30ec\u30fc\u30c0\u30fc\u3001\u822a\u7a7a\u6a5f\u306a\u3069\u306e\u5b9f\u7528\u7684\u306a\u7528\u9014\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_generate-full-width-content":"","footnotes":""},"categories":[96],"tags":[97],"class_list":["post-209215","post","type-post","status-publish","format-standard","hentry","category-96","tag-97","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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