{"id":209458,"date":"2024-03-21T14:08:11","date_gmt":"2024-03-21T14:08:11","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%e6%b3%a2%e3%82%a4%e3%83%b3%e3%83%94%e3%83%bc%e3%83%80%e3%83%b3%e3%82%b9%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":"2024-05-17T15:13:16","modified_gmt":"2024-05-17T15:13:16","slug":"%e6%b3%a2%e3%82%a4%e3%83%b3%e3%83%94%e3%83%bc%e3%83%80%e3%83%b3%e3%82%b9%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\/%e6%b3%a2%e3%82%a4%e3%83%b3%e3%83%94%e3%83%bc%e3%83%80%e3%83%b3%e3%82%b9%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":"\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5 &#038; \u7528\u9014"},"content":{"rendered":"<p class=\"sidekick\">\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5177\u4f53\u7684\u306a\u7528\u9014\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u96fb\u78c1\u6ce2\u3084\u97f3\u6ce2\u306e\u7814\u7a76\u3067\u91cd\u8981\u306a\u6982\u5ff5\u3092\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u516c\u5f0f | \u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5 &#038; \u7528\u9014<\/h2>\n<p>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\uff08wave impedance\uff09\u306f\u3001\u96fb\u6c17\u5de5\u5b66\u3084\u7269\u7406\u5b66\u306e\u4e2d\u3067\u6ce2\u306e\u4f1d\u642c\u306b\u95a2\u3059\u308b\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3059\u3002\u7279\u306b\u3001\u96fb\u78c1\u6ce2\u3084\u97f3\u6ce2\u306e\u7814\u7a76\u3067\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u304a\u3088\u3073\u5177\u4f53\u7684\u306a\u7528\u9014\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u306f\uff1f<\/h3>\n<p>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u3068\u306f\u3001\u7279\u5b9a\u306e\u5a92\u8cea\u4e2d\u3067\u306e\u6ce2\u306e\u96fb\u5834\uff08\u307e\u305f\u306f\u529b\u5834\uff09\u3068\u78c1\u5834\uff08\u307e\u305f\u306f\u901f\u5ea6\u5834\uff09\u306e\u6bd4\u7387\u3092\u793a\u3059\u7269\u7406\u91cf\u3067\u3059\u3002\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3001\u6ce2\u306e\u53cd\u5c04\u3084\u900f\u904e\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u4f1d\u642c\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002<\/p>\n<h3>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u516c\u5f0f<\/h3>\n<p>\u4e00\u822c\u306b\u3001\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9 \\( Z \\) \u306f\u4ee5\u4e0b\u306e\u5f0f\u3067\u8868\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[<br \/>\nZ = \\frac{E}{H}<br \/>\n\\]<\/p>\n<p>\u3053\u3053\u3067\u3001\\( E \\) \u306f\u96fb\u5834\u5f37\u5ea6\uff08electric field strength\uff09\u3001\\( H \\) \u306f\u78c1\u5834\u5f37\u5ea6\uff08magnetic field strength\uff09\u3067\u3059\u3002\u3053\u306e\u5f0f\u306f\u7279\u306b\u96fb\u78c1\u6ce2\u306b\u9069\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u96fb\u78c1\u6ce2\u304c\u771f\u7a7a\u4e2d\u3092\u4f1d\u642c\u3059\u308b\u5834\u5408\u3001\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u771f\u7a7a\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9 \\( Z_0 \\) \u3067\u8868\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>\\[<br \/>\nZ_0 = \\sqrt{\\frac{\\mu_0}{\\varepsilon_0}}<br \/>\n\\]<\/p>\n<p>\u3053\u3053\u3067\u3001\\( \\mu_0 \\) \u306f\u771f\u7a7a\u306e\u900f\u78c1\u7387\uff08permeability of free space\uff09\u3001\\( \\varepsilon_0 \\) \u306f\u771f\u7a7a\u306e\u8a98\u96fb\u7387\uff08permittivity of free space\uff09\u3067\u3059\u3002<\/p>\n<h3>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u8a08\u7b97\u65b9\u6cd5<\/h3>\n<p>\u5177\u4f53\u7684\u306a\u8a08\u7b97\u4f8b\u3068\u3057\u3066\u3001\u771f\u7a7a\u4e2d\u306e\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9 \\( Z_0 \\) \u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u5b9a\u6570\u306e\u5024\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<p>\\[<br \/>\n\\mu_0 \\approx 4\\pi \\times 10^{-7} \\, \\text{H\/m}<br \/>\n\\]<br \/>\n\\[<br \/>\n\\varepsilon_0 \\approx 8.854 \\times 10^{-12} \\, \\text{F\/m}<br \/>\n\\]<\/p>\n<p>\u3053\u308c\u3092\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u5f0f\u306b\u4ee3\u5165\u3059\u308b\u3068\uff1a<\/p>\n<p>\\[<br \/>\nZ_0 = \\sqrt{\\frac{4\\pi \\times 10^{-7}}{8.854 \\times 10^{-12}}}<br \/>\n\\]<\/p>\n<p>\u8a08\u7b97\u3059\u308b\u3068\u3001\u304a\u304a\u3088\u305d \\( 377 \\, \\Omega \\)\uff08\u30aa\u30fc\u30e0\uff09\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u7528\u9014<\/h3>\n<p>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3055\u307e\u3056\u307e\u306a\u5206\u91ce\u3067\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u3066\u3044\u307e\u3059\u3002\u3044\u304f\u3064\u304b\u306e\u4f8b\u3092\u6319\u3052\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li><strong>\u30a2\u30f3\u30c6\u30ca\u8a2d\u8a08:<\/strong> \u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u3001\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30de\u30c3\u30c1\u30f3\u30b0\u306f\u52b9\u7387\u7684\u306a\u30a8\u30cd\u30eb\u30ae\u30fc\u4f1d\u9001\u306e\u305f\u3081\u306b\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u304c\u4e0d\u6574\u5408\u306e\u5834\u5408\u3001\u6ce2\u306e\u53cd\u5c04\u304c\u751f\u3058\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u640d\u5931\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/li>\n<li><strong>\u97f3\u97ff\u5de5\u5b66:<\/strong> \u97f3\u6ce2\u304c\u7570\u306a\u308b\u5a92\u8cea\u3092\u901a\u904e\u3059\u308b\u969b\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u9055\u3044\u306f\u3001\u6ce2\u306e\u53cd\u5c04\u3084\u900f\u904e\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u97f3\u97ff\u6a5f\u5668\u3084\u5efa\u7269\u306e\u97f3\u97ff\u8a2d\u8a08\u306b\u304a\u3044\u3066\u91cd\u8981\u306a\u8003\u616e\u4e8b\u9805\u3068\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u5149\u901a\u4fe1:<\/strong> \u5149\u30d5\u30a1\u30a4\u30d0\u30fc\u901a\u4fe1\u3067\u306f\u3001\u7570\u306a\u308b\u6750\u6599\u9593\u306e\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30de\u30c3\u30c1\u30f3\u30b0\u304c\u30b7\u30b0\u30ca\u30eb\u306e\u52b9\u7387\u7684\u306a\u4f1d\u9001\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/li>\n<\/ul>\n<h3>\u307e\u3068\u3081<\/h3>\n<p>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306f\u3001\u6ce2\u306e\u4f1d\u642c\u306b\u304a\u3044\u3066\u975e\u5e38\u306b\u91cd\u8981\u306a\u6982\u5ff5\u3067\u3042\u308a\u3001\u591a\u304f\u306e\u5de5\u5b66\u3084\u7269\u7406\u5b66\u306e\u5206\u91ce\u3067\u5fdc\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u57fa\u672c\u7684\u306a\u5f0f\u3068\u8a08\u7b97\u65b9\u6cd5\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u69d8\u3005\u306a\u5fdc\u7528\u306b\u5bfe\u3057\u3066\u9069\u5207\u306a\u5bfe\u7b56\u3092\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u7406\u89e3\u306f\u3001\u52b9\u7387\u7684\u306a\u30b7\u30b9\u30c6\u30e0\u8a2d\u8a08\u3084\u6ce2\u52d5\u306e\u6319\u52d5\u306e\u89e3\u6790\u306b\u4e0d\u53ef\u6b20\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6ce2\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u306e\u5b9a\u7fa9\u3001\u8a08\u7b97\u65b9\u6cd5\u3001\u5177\u4f53\u7684\u306a\u7528\u9014\u306b\u3064\u3044\u3066\u89e3\u8aac\u3002\u96fb\u78c1\u6ce2\u3084\u97f3\u6ce2\u306e\u7814\u7a76\u3067\u91cd\u8981\u306a\u6982\u5ff5\u3092\u8a73\u3057\u304f\u8aac\u660e\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-209458","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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