{"id":214703,"date":"2024-08-08T18:05:27","date_gmt":"2024-08-08T18:05:27","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/?p=214703"},"modified":"2024-08-08T18:05:27","modified_gmt":"2024-08-08T18:05:27","slug":"%e7%89%b9%e5%ae%9a%e3%81%ae%e5%91%a8%e6%b3%a2%e6%95%b0%e5%b8%af%e5%9f%9f%e3%81%a8%e7%94%a8%e9%80%94%e3%81%ab%e9%81%a9%e3%81%97%e3%81%9f%e3%82%a2%e3%83%b3%e3%83%86%e3%83%8a%e3%81%ae%e8%a8%ad%e8%a8%88","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ja\/%e7%89%b9%e5%ae%9a%e3%81%ae%e5%91%a8%e6%b3%a2%e6%95%b0%e5%b8%af%e5%9f%9f%e3%81%a8%e7%94%a8%e9%80%94%e3%81%ab%e9%81%a9%e3%81%97%e3%81%9f%e3%82%a2%e3%83%b3%e3%83%86%e3%83%8a%e3%81%ae%e8%a8%ad%e8%a8%88\/","title":{"rendered":"\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014\u306b\u9069\u3057\u305f\u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u8a08\u65b9\u6cd5"},"content":{"rendered":"<p class=\"sidekick\">\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014\u306b\u9069\u3057\u305f\u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u8a08\u65b9\u6cd5\u3092\u8a73\u89e3\u3002\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u5b9f\u8df5\u7684\u306a\u57fa\u790e\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002<\/p>\n<h2>\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014\u306b\u9069\u3057\u305f\u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u8a08\u65b9\u6cd5<\/h2>\n<p>\u7121\u7dda\u901a\u4fe1\u306b\u304a\u3044\u3066\u30a2\u30f3\u30c6\u30ca\u306f\u975e\u5e38\u306b\u91cd\u8981\u306a\u5f79\u5272\u3092\u679c\u305f\u3057\u307e\u3059\u3002\u9069\u5207\u306a\u30a2\u30f3\u30c6\u30ca\u3092\u8a2d\u8a08\u3059\u308b\u3053\u3068\u3067\u3001\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3067\u306e\u901a\u4fe1\u52b9\u7387\u3092\u5927\u5e45\u306b\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u51fa\u767a\u70b9\u3068\u3057\u3066\u30a2\u30f3\u30c6\u30ca\u306e\u57fa\u672c\u7684\u306a\u8a2d\u8a08\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h2>\u30a2\u30f3\u30c6\u30ca\u306e\u57fa\u672c\u8a2d\u8a08\u8981\u7d20<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u8a08\u306b\u304a\u3044\u3066\u8003\u616e\u3059\u3079\u304d\u57fa\u672c\u7684\u306a\u8981\u7d20\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\uff1a<\/p>\n<ul>\n<li>\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014<\/li>\n<li>\u30a2\u30f3\u30c6\u30ca\u306e\u5f62\u72b6\u3068\u30b5\u30a4\u30ba<\/li>\n<li>\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9<\/li>\n<li>\u5229\u5f97\u3068\u6307\u5411\u6027<\/li>\n<\/ul>\n<h2>\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014<\/h2>\n<p>\u307e\u305a\u3001\u30a2\u30f3\u30c6\u30ca\u304c\u52d5\u4f5c\u3059\u308b\u5468\u6ce2\u6570\u5e2f\u57df\u3092\u6c7a\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30a2\u30f3\u30c6\u30ca\u306e\u5171\u632f\u5468\u6ce2\u6570\u306f\u4f7f\u7528\u3059\u308b\u6750\u6599\u3068\u7269\u7406\u7684\u306a\u9577\u3055\u306b\u4f9d\u5b58\u3057\u307e\u3059\u3002\u3053\u306e\u5171\u632f\u5468\u6ce2\u6570\u3092\u8a08\u7b97\u3059\u308b\u305f\u3081\u306b\u6b21\u306e\u3088\u3046\u306a\u516c\u5f0f\u3092\u4f7f\u7528\u3057\u307e\u3059\uff1a<\/p>\n<p><u1>\u5171\u632f\u5468\u6ce2\u6570 (f)<\/u1><\/p>\n<p><sub>f<\/sub> = \\frac{c}{2L}<\/p>\n<p>\u3053\u3053\u3067\u3001<sub>c<\/sub>\u306f\u5149\u901f (\u7d04299,792,458 m\/s)\u3001<sub>L<\/sub>\u306f\u30a2\u30f3\u30c6\u30ca\u306e\u7269\u7406\u7684\u306a\u9577\u3055\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001L\u3092\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u306b\u5408\u308f\u305b\u3066\u8abf\u6574\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u6700\u9069\u306a\u30a2\u30f3\u30c6\u30ca\u9577\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<h2>\u30a2\u30f3\u30c6\u30ca\u306e\u5f62\u72b6\u3068\u30b5\u30a4\u30ba<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u306e\u5f62\u72b6\u306f\u7528\u9014\u306b\u3088\u308a\u7570\u306a\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\uff1a<\/p>\n<ol>\n<li><strong>\u30c0\u30a4\u30dd\u30fc\u30eb\u30a2\u30f3\u30c6\u30ca\uff1a<\/strong>\u57fa\u672c\u7684\u306a\u30a2\u30f3\u30c6\u30ca\u3067\u3042\u308a\u3001\u6bd4\u8f03\u7684\u7c21\u5358\u306b\u8a2d\u8a08\u3067\u304d\u307e\u3059\u3002\u901a\u5e38\u3001\u96fb\u78c1\u6ce2\u306e\u534a\u6ce2\u9577\u307b\u3069\u306e\u9577\u3055\u306b\u306a\u308a\u307e\u3059\u3002<\/li>\n<li><strong>\u30d1\u30c3\u30c1\u30a2\u30f3\u30c6\u30ca\uff1a<\/strong>\u5e73\u3089\u306a\u5f62\u72b6\u3092\u3057\u3066\u304a\u308a\u3001\u5c0f\u578b\u5316\u304c\u6c42\u3081\u3089\u308c\u308b\u7528\u9014\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<li><strong>\u516b\u6728\u30a2\u30f3\u30c6\u30ca\uff1a<\/strong>\u9ad8\u3044\u6307\u5411\u6027\u304c\u5fc5\u8981\u306a\u7528\u9014\u306b\u4f7f\u7528\u3055\u308c\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/li>\n<\/ol>\n<h2>\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30de\u30c3\u30c1\u30f3\u30b0<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u3068\u9001\u53d7\u4fe1\u6a5f\u306e\u9593\u306b\u306f\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30de\u30c3\u30c1\u30f3\u30b0\u304c\u5fc5\u8981\u3067\u3059\u3002\u9069\u5207\u306a\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\uff08\u901a\u5e38\u306f50\u30aa\u30fc\u30e0\uff09\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068\u3067\u3001\u30a8\u30cd\u30eb\u30ae\u30fc\u306e\u52b9\u7387\u7684\u306a\u4f1d\u9054\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u30a4\u30f3\u30d4\u30fc\u30c0\u30f3\u30b9\u30de\u30c3\u30c1\u30f3\u30b0\u306f<br \/>\u300c\u30b9\u30df\u30b9\u30c1\u30e3\u30fc\u30c8\u300d\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u8996\u899a\u7684\u306b\u8abf\u6574\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<h2>\u5229\u5f97\u3068\u6307\u5411\u6027<\/h2>\n<p>\u30a2\u30f3\u30c6\u30ca\u306e\u5229\u5f97\u306f\u3001\u305d\u306e\u6307\u5411\u6027\u3068\u5bc6\u63a5\u306b\u95a2\u9023\u3057\u3066\u3044\u307e\u3059\u3002\u30a2\u30f3\u30c6\u30ca\u306e\u5229\u5f97\uff08G\uff09\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u5b9a\u7fa9\u3055\u308c\u307e\u3059\uff1a<\/p>\n<p>G = 10 * \\log_{10}(\\frac{P_{radiated}}{P_{input}}) [dB]<\/p>\n<p>\u3053\u3053\u3067\u3001<sub>P_{radiated}<\/sub>\u306f\u653e\u5c04\u3055\u308c\u308b\u96fb\u529b\u3001<sub>P_{input}<\/sub>\u306f\u5165\u529b\u96fb\u529b\u3067\u3059\u3002\u9ad8\u5229\u5f97\u306e\u30a2\u30f3\u30c6\u30ca\u306f\u4e00\u5b9a\u65b9\u5411\u306b\u5f37\u304f\u96fb\u6ce2\u3092\u653e\u5c04\u3057\u307e\u3059\u304c\u3001\u4f4e\u5229\u5f97\u306e\u30a2\u30f3\u30c6\u30ca\u306f\u5168\u65b9\u5411\u306b\u5747\u4e00\u306b\u653e\u5c04\u3057\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014\u306b\u9069\u3057\u305f\u30a2\u30f3\u30c6\u30ca\u3092\u8a2d\u8a08\u3059\u308b\u306b\u306f\u3001\u3053\u308c\u3089\u306e\u8981\u7d20\u3059\u3079\u3066\u3092\u7dcf\u5408\u7684\u306b\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u9069\u5207\u306a\u8a2d\u8a08\u3068\u8abf\u6574\u306b\u3088\u3063\u3066\u3001\u52b9\u7387\u7684\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u7121\u7dda\u901a\u4fe1\u30b7\u30b9\u30c6\u30e0\u3092\u69cb\u7bc9\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7279\u5b9a\u306e\u5468\u6ce2\u6570\u5e2f\u57df\u3068\u7528\u9014\u306b\u9069\u3057\u305f\u30a2\u30f3\u30c6\u30ca\u306e\u8a2d\u8a08\u65b9\u6cd5\u3092\u8a73\u89e3\u3002\u521d\u5fc3\u8005\u306b\u3082\u308f\u304b\u308a\u3084\u3059\u304f\u3001\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u306e\u5b9f\u8df5\u7684\u306a\u57fa\u790e\u3092\u63d0\u4f9b\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":[102],"tags":[],"class_list":["post-214703","post","type-post","status-publish","format-standard","hentry","category-102","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50"],"yoast_head":"<!-- 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