{"id":10345,"date":"2024-03-25T11:31:37","date_gmt":"2024-03-25T02:31:37","guid":{"rendered":"https:\/\/www11.ieice.org\/cs\/ap\/wp\/?page_id=10345"},"modified":"2025-12-05T19:18:34","modified_gmt":"2025-12-05T10:18:34","slug":"propagation_loss_in_urban_environment","status":"publish","type":"page","link":"https:\/\/www.ieice.org\/cs\/ap\/misc\/denpan-db\/prop_model_db\/model_list\/propagation_loss_in_urban_environment\/","title":{"rendered":"\u3010 \u898b\u8fbc\u307f\u89d2\u5ea6\u306b\u3088\u308b\u8ddd\u96e2\u7279\u6027\uff08\u5869\u7530\u3001\u5ca9\u4e95\u3001\u7b39\u5ca1\u30012006\uff09\u3011"},"content":{"rendered":"
<\/div>

<\/path><\/svg><\/i> \"Loading\"<\/p>

<\/div>(since 2025\/12\/5)<\/p>\n\n\n\n

\u30e2\u30c7\u30eb\u306e\u6982\u8981<\/h3>\n\n\n\n

\u3000\u5e02\u8857\u5730\u74b0\u5883\u3067\u306e\u4f1d\u642c\u640d\u5931\u306e\u8ddd\u96e2\u7279\u6027\u306f\u3001\\(L\\)\u221d\\(d^n\\)\u306e\u30d9\u30ad\u4e57\u3067\u8868\u3055\u308c\u3066\u3001\u4fc2\u6570\\(n\\)\u306f\\(n\\)=3\uff5e4\u7a0b\u5ea6\u3067\u3042\u308b\u3053\u3068\u304c\u4ee5\u524d\u304b\u3089\u77e5\u3089\u308c\u3066\u3044\u308b\u3002\u3053\u306e\\(d^n\\)\u306e\u3046\u3061\\(d^2\\)\u306f\u81ea\u7531\u7a7a\u9593\u640d\u5931\u3067\u3042\u308b\u306e\u3067\u3001\u8d85\u904e\u640d\u5931\u304c\\(d^{n-2}\\)\u3067\u8868\u3055\u308c\u308b\u3053\u3068\u306b\u306a\u308b\u3002\u6e2c\u5b9a\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u4f5c\u3089\u308c\u305f\u5965\u6751-\u79e6\u5f0f[1]\u3082\u3053\u306e\u30d9\u30ad\u4e57\u3067\u8868\u3055\u308c\u3066\u3044\u308b\u3002\u7406\u8ad6\u89e3\u6790\u306b\u57fa\u3065\u304fWalfisch[2]\u3084Xia[3]\u306e\u30e2\u30c7\u30eb\u3067\u306f\u5efa\u7269\u3092\u5e73\u677f\u306b\u898b\u7acb\u3066\u3066\u3053\u308c\u3092\u4f55\u5ea6\u3082\u56de\u6298\u3059\u308b\u591a\u91cd\u30b9\u30af\u30ea\u30fc\u30f3\u56de\u6298\u306b\u3088\u308a\\(n\\)=3.8\u306e\u8ddd\u96e2\u7279\u6027\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u308b\u3002\u6c60\u4e0a\u30e2\u30c7\u30eb[4]\u306f\u3001\u5efa\u7269\u4e0a\u90e8\u3092\u56de\u6298\u3057\u3066\u76f4\u63a5\u5c4a\u304f\u6ce2\u3068\u5411\u304b\u3044\u306e\u5efa\u7269\u306b\u53cd\u5c04\u3057\u305f\u6ce2\u3092\u7528\u3044\u308b\u304c\u3001\u5efa\u7269\u4e0a\u90e8\u307e\u3067\u3092\u81ea\u7531\u7a7a\u9593\u640d\u5931\u3068\u4eee\u5b9a\u3057\u305f\u306e\u3067\\(n\\)=2\u3068\u306a\u3063\u3066\u3044\u308b\u3002\u672c\u30e2\u30c7\u30eb[5]\u306f\u3001\u5efa\u7269\u4e0a\u90e8\u304b\u3089\u5efa\u7269\u9593\u306b\u4fb5\u5165\u3059\u308b\u96fb\u6ce2\u306e\u30a8\u30cd\u30eb\u30ae\u30fc\u91cf\u306f\u305d\u306e\u958b\u53e3\u90e8\u3092\u57fa\u5730\u5c40\u30a2\u30f3\u30c6\u30ca\u4f4d\u7f6e\u304b\u3089\u898b\u8fbc\u3080\u89d2\u5ea6\\(\u03b1\\)\u306b\u6bd4\u4f8b\u3059\u308b\u3082\u306e\u3068\u8003\u3048\u308b\u3002\u306a\u304a\u3001\u3053\u3053\u3067\u306f\u57fa\u5730\u5c40\u9ad8\u304c\u5e73\u5747\u30d3\u30eb\u9ad8\u3088\u308a\u9ad8\u3044\u5834\u5408\u3092\u5bfe\u8c61\u306b\u3057\u3066\u3044\u308b\u3002\u56f31\u306b\u5f93\u6765\u306e2\u3064\u306e\u30e2\u30c7\u30eb\u3068\u672c\u30e2\u30c7\u30eb\u306e\u4f1d\u642c\u306e\u30e1\u30ab\u30cb\u30ba\u30e0\u3092\u793a\u3059\u3002<\/p>\n\n\n

\n
\"\"
\u56f31 \u4f1d\u642c\u30e2\u30c7\u30eb\u306e\u30e1\u30ab\u30cb\u30ba\u30e0<\/figcaption><\/figure><\/div>\n\n\n

\u3000\u6587\u732e[5]\u306b\u306f\u672c\u30e2\u30c7\u30eb\u306e\u4f1d\u642c\u640d\u5931\u306e\u8ddd\u96e2\u7279\u6027\u304c\u30b0\u30e9\u30d5\u3067\u793a\u3055\u308c\u3066\u304a\u308a\u3001\u8ddd\u96e2\u306e4\u4e57\u306b\u6bd4\u4f8b\u3057\u3066\u3044\u308b\u3002\u6587\u732e[5]\u306b\u306f\u8ddd\u96e2\u306e4\u4e57\u306b\u306a\u308b\u7406\u7531\u307e\u3067\u306f\u793a\u3055\u308c\u3066\u3044\u306a\u3044\u304c\u3001\u6b21\u306e\u3088\u3046\u306b\u8003\u3048\u3089\u308c\u308b\u3002<\/p>\n\n\n\n

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\\(
{\\displaystyle \u03b1_1=\\tan^{-1}\\frac{h_b-h_0}{d-w\/2}\u2248\\frac{h_b-h_0}{d-w\/2} } \\\\\\tag{1}
\\)<\/p>\n\n\n\n

\\(
{\\displaystyle \u03b1_2=\\frac{h_b-h_0}{d+w\/2} } \\\\\\tag{2}
\\)<\/p>\n\n\n\n

\u3053\u3053\u3067\u3001\\(h_b\\)\u306f\u57fa\u5730\u5c40\u9ad8\u3001\\(h_0\\)\u306f\u5e73\u5747\u30d3\u30eb\u9ad8\u3001\\(d\\)\u306f\u9001\u53d7\u4fe1\u9593\u8ddd\u96e2\u3001\\(w\\)\u306f\u9053\u8def\u5e45\u3067\u3042\u308b\u3002\u898b\u8fbc\u307f\u89d2\u5ea6\\(\u03b1\\)\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\\(
{\\displaystyle \u03b1=\u03b1_1-\u03b1_2=\\frac{w(h_b-h_0)}{d^2-(w\/2)^2}\u221d\\frac{1}{d^2} }\\\\\\tag{3}
\\)<\/p>\n\n\n\n

\u53d7\u4fe1\u96fb\u529b\\(P\\)\u306f\u81ea\u7531\u7a7a\u9593\u640d\u5931\u306e\u4ed6\u306b\u898b\u8fbc\u307f\u89d2\u5ea6\\(\u03b1\\)\u306b\u6bd4\u4f8b\u3059\u308b\u3068\u8003\u3048\u308b\u306e\u3067\u3001\u4f1d\u642c\u640d\u5931\\(L\\)\u306e\u8ddd\u96e2\u7279\u6027\u306f\u6b21\u5f0f\u3067\u8868\u3055\u308c\u308b\u3002<\/p>\n\n\n\n

\\(
{\\displaystyle L\u221d\\frac{1}{P}\u221d\\frac{d^2}{\u03b1}\u221dd^4 } \\\\\\tag{4}
\\)<\/p>\n\n\n\n

\u306a\u304a\u3001\u4f0f\u89d2\\(\u03b1_1\\)\u3084\\(\u03b1_2\\)\u306f\\(d^2\\)\u3067\u306f\u306a\u304f\\(d\\) <\/em>\u306b\u6bd4\u4f8b\u3059\u308b\u306e\u3067\u30014\u4e57\u306e\u8ddd\u96e2\u7279\u6027\u3092\u5f97\u308b\u306b\u306f\u3053\u308c\u3089\u306e\u5dee\u3092\u7528\u3044\u308b\u3053\u3068\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3042\u308b\u3068\u601d\u308f\u308c\u308b\u3002<\/p>\n\n\n

\n
\"\"
\u56f32 \u898b\u8fbc\u307f\u89d2\u5ea6\u306b\u3088\u308b\u8ddd\u96e2\u7279\u6027<\/figcaption><\/figure><\/div>\n\n\n

\u672c\u30e2\u30c7\u30eb\u306f\u4f1d\u642c\u640d\u5931\u306e\u8ddd\u96e2\u7279\u6027\u304c\u3001\\(L\u221dd^n\\)\u306e\u30d9\u30ad\u4e57\u3067\u8868\u3055\u308c\u308b\u3053\u3068\u3092\u5bb9\u6613\u306b\u8aac\u660e\u3067\u304d\u308b\u3002\u307e\u305f\u3001\u6587\u732e[5]\u306b\u306f\u3053\u306e\u30e2\u30c7\u30eb\u3092\u7528\u3044\u3066\u9053\u8def\u89d2\u5ea6\u7279\u6027\u3082\u8868\u305b\u308b\u3053\u3068\u3092\u793a\u3057\u3066\u3044\u308b\u3002<\/p>\n\n\n\n

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\u3000\u5e02\u8857\u5730\u74b0\u5883\u3067\u306fWalfisch\u306e\u591a\u91cd\u30b9\u30af\u30ea\u30fc\u30f3\u56de\u6298\u306b\u3088\u308b\u6e1b\u8870\u3082\u8d77\u304d\u3066\u3044\u308b\u3068\u3059\u308b\u306a\u3089\uff12\u3064\u306e\u30e2\u30c7\u30eb\u3092\u8db3\u3057\u5408\u308f\u305b\u308b\u3068\u640d\u5931\u304c\u5927\u304d\u304f\u306a\u308b\u3002\u305d\u3053\u3067\u6b21\u306e\u3088\u3046\u306b\u8003\u3048\u3066\u307f\u308b\u3002\u5b9f\u969b\u306e\u5e02\u8857\u5730\u3067\u306f\u5efa\u7269\u9ad8\u306b\u3070\u3089\u3064\u304d\u304c\u3042\u308b\u306e\u3067\u57fa\u5730\u5c40\u304b\u3089\u9060\u65b9\u3067\u306f\u898b\u8fbc\u307f\u89d2\u5ea6\u306b\u3088\u308b\u5f71\u97ff\u304c\u5c0f\u3055\u304f\u306a\u308b\u3002\u307e\u305f\u3001\u8fd1\u508d\u3067\u306f\u57fa\u5730\u5c40\u9ad8\u304c\u9ad8\u3044\u5834\u5408\u306f\u591a\u91cd\u30b9\u30af\u30ea\u30fc\u30f3\u56de\u6298\u640d\u5931\u306e\u5f71\u97ff\u304c\u5c0f\u3055\u3044\u3002\u8fd1\u508d\u3067\u306f\u672c\u30e2\u30c7\u30eb\u3001\u9060\u65b9\u3067\u306fWalfisch\u30e2\u30c7\u30eb\u306e\u5f71\u97ff\u304c\u5927\u304d\u3044\u3068\u8003\u3048\u308b\u3068\uff12\u3064\u306e\u30e2\u30c7\u30eb\u3092\u5408\u308f\u305b\u3066\u3082\u77db\u76fe\u3057\u306a\u3044\u3002\u57fa\u5730\u5c40\u304c\u885b\u661f\u3084\u30c9\u30ed\u30fc\u30f3\u7b49\u306e\u98db\u7fd4\u4f53\u3067\u3042\u308b\u3068\u304d\u306f\u3001\u57fa\u5730\u5c40\u9ad8\u304c\u9ad8\u304f\u306a\u308b\u306e\u3067\u898b\u8fbc\u307f\u89d2\u5ea6\u3082\u5927\u304d\u304f\u306a\u308b\u3002\u3053\u306e\u3088\u3046\u306a\u5834\u5408\u306b\u306f\u672c\u30e2\u30c7\u30eb\u304c\u6709\u52b9\u3067\u3042\u308b\u3068\u601d\u308f\u308c\u308b\u3002
\u3000\u306a\u304a\u3001\u96fb\u6ce2\u304c\u30d3\u30eb\u306e\u8c37\u9593\u306b\u5165\u5c04\u3059\u308b\u3068\u304d\u306e\u958b\u53e3\u90e8\u306e\u6709\u52b9\u306a\u5927\u304d\u3055\u306f\\(\u03b1 \\cdot d\\)\u3067\u3042\u308a\\(\u03b1\\)\u3067\u306f\u306a\u3044\u3002\u53d7\u4fe1\u96fb\u529b\u304c\u30d3\u30eb\u306e\u8c37\u9593\u306e\u6709\u52b9\u306a\u958b\u53e3\u306b\u6bd4\u4f8b\u3059\u308b\u3068\u8003\u3048\u3066\u306f\u3044\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\u8a08\u7b97\u4f8b<\/h3>\n\n\n\n

\u6b21\u306e\u6761\u4ef6\u3067\u5e02\u8857\u5730\u74b0\u5883\u3067\u306e\u4f1d\u642c\u640d\u5931\u306e\u8ddd\u96e2\u7279\u6027\u3092\u6c42\u3081\u308b\u3002
\u57fa\u5730\u5c40\u9ad8\\(h_b\\)=50m\u3001\u5e73\u5747\u30d3\u30eb\u9ad8\\(h_0\\)=30m\u3001\u9053\u8def\u5e45\\(w\\)=20m<\/p>\n\n\n

\n
\"\"
\u56f3\uff13 \u8a08\u7b97\u4f8b<\/figcaption><\/figure><\/div>\n\n\n

\u53c2\u7167<\/h2>\n\n\n\n[1] M. Hata, \u201cEmpirical formula for propagation loss in land mobile radio services, \u201dIEEE Trans. Veh. Technol., vol.VT-29, no.3, pp.317-325, Aug. 1980.<\/p>\n\n\n\n[2] J. Walfisch and H. L. Bertoni, \u201cA theoretical model of UHF propagation in urban environment, \u201dIEEE Trans. Antennas Propagat., AP-36, no.12, pp.1788-1796, Dec. 1988.<\/p>\n\n\n\n[3] H\uff0eH\uff0eXia, \u201cA simplified analytical model for predicting path loss in urban and suburban environments,\u201d IEEE Trans\uff0eVeh. Technol.\uff0cVT-46\uff0cNo.4, pp\uff0e1040-1046\uff0c Nov\uff0e1997\uff0e<\/p>\n\n\n\n[4] F. Ikegami, S. Yoshida, T. Takeuchi, and M. Umehira, \u201cPropagation factors controlling mean field strength on urban streets, \u201dIEEE Trans. Antennas Propagat., AP-32, no.8, pp.822-829, Aug. 1984.<\/p>\n\n\n\n[5]\u5869\u7530\u7d62\u5b50\u3001\u5ca9\u4e95\u8aa0\u4eba\u3001\u7b39\u5ca1\u79c0\u4e00\uff0c\u201c\u5e02\u8857\u5730\u74b0\u5883\u306b\u304a\u3051\u308b\u4f1d\u642c\u640d\u5931\u8ddd\u96e2\u7279\u6027\u306b\u95a2\u3059\u308b\u4e00\u691c\u8a0e\uff0c\u201d 2006\u4fe1\u5b66\u7dcf\u5927\uff0cB-1-22, p.22, Mar. 2006.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u30e2\u30c7\u30eb\u306e\u6982\u8981 \u3000\u5e02\u8857\u5730\u74b0\u5883\u3067\u306e\u4f1d\u642c\u640d\u5931\u306e\u8ddd\u96e2\u7279\u6027\u306f\u3001\\(L\\)\u221d\\(d^n\\)\u306e\u30d9\u30ad\u4e57\u3067\u8868\u3055\u308c\u3066\u3001\u4fc2\u6570\\(n\\)\u306f\\(n\\)=3\uff5e4\u7a0b\u5ea6\u3067\u3042\u308b\u3053\u3068\u304c\u4ee5\u524d\u304b\u3089\u77e5\u3089\u308c\u3066\u3044\u308b\u3002\u3053\u306e\\(d^n\\)\u306e\u3046\u3061\\(d^2\\)\u306f\u81ea\u7531\u7a7a\u9593\u640d […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":12073,"menu_order":73,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-10345","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/10345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/comments?post=10345"}],"version-history":[{"count":30,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/10345\/revisions"}],"predecessor-version":[{"id":14890,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/10345\/revisions\/14890"}],"up":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/12073"}],"wp:attachment":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/media?parent=10345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}