{"id":208647,"date":"2024-03-21T14:06:33","date_gmt":"2024-03-21T14:06:33","guid":{"rendered":"https:\/\/www.electricity-magnetism.org\/%ec%a0%84%ed%8c%8c-%ec%83%81%ec%88%98-%ec%a0%95%ec%9d%98-%ea%b3%84%ec%82%b0-%eb%b0%8f-%ec%9d%91%ec%9a%a9\/"},"modified":"2024-05-15T11:30:45","modified_gmt":"2024-05-15T11:30:45","slug":"%ec%a0%84%ed%8c%8c-%ec%83%81%ec%88%98-%ec%a0%95%ec%9d%98-%ea%b3%84%ec%82%b0-%eb%b0%8f-%ec%9d%91%ec%9a%a9","status":"publish","type":"post","link":"https:\/\/www.electricity-magnetism.org\/ko\/%ec%a0%84%ed%8c%8c-%ec%83%81%ec%88%98-%ec%a0%95%ec%9d%98-%ea%b3%84%ec%82%b0-%eb%b0%8f-%ec%9d%91%ec%9a%a9\/","title":{"rendered":"\uc804\ud30c \uc0c1\uc218 | \uc815\uc758, \uacc4\uc0b0 \ubc0f \uc751\uc6a9"},"content":{"rendered":"

\uc804\ud30c \uc0c1\uc218\ub294 \uc804\uc790\uae30\ud30c\uc758 \uac10\uc1e0 \ubc0f \uc704\uc0c1 \ubcc0\ud654\ub97c \ubd84\uc11d\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \ub9e4\uac1c\ubcc0\uc218\uc785\ub2c8\ub2e4.<\/p>\n

\uc804\ud30c \uc0c1\uc218\ub780 \ubb34\uc5c7\uc778\uac00?<\/h2>\n

\uc804\ud30c \uc0c1\uc218(propagation constant)\ub294 \uc804\uc790\uae30\ud30c\uac00 \uc804\uc1a1 \ub9e4\uccb4\ub97c \ud1b5\ud574 \uc9c4\ud589\ub420 \ub54c \uadf8 \uac10\uc1e0 \ubc0f \uc704\uc0c1 \ubcc0\ud654\ub97c \uc124\uba85\ud558\ub294 \ub370 \uc0ac\uc6a9\ub418\ub294 \uc911\uc694\ud55c \ub9e4\uac1c\ubcc0\uc218\uc785\ub2c8\ub2e4. \uc774 \uc0c1\uc218\ub294 \ud2b9\ud788 \uc804\uc790\ud1b5\uc2e0 \ubd84\uc57c\uc5d0\uc11c \uad11\uc12c\uc720, \ucf00\uc774\ube14, \ubb34\uc120 \ucc44\ub110 \ub4f1 \ub2e4\uc591\ud55c \uc804\uc1a1 \ub9e4\uccb4\uc758 \uc804\ud30c \ud2b9\uc131\uc744 \ubd84\uc11d\ud560 \ub54c \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \uc804\ud30c \uc0c1\uc218\ub294 \ubcf4\ud1b5 \uadf8\ub9ac\uc2a4 \ubb38\uc790 \\(\\gamma\\)\ub85c \ud45c\uc2dc\ub418\uba70, \ubcf5\uc18c\uc218 \ud615\ud0dc\ub85c \ud45c\ud604\ub429\ub2c8\ub2e4.<\/p>\n

\uc804\ud30c \uc0c1\uc218\uc758 \uacc4\uc0b0<\/h2>\n

\\(\\gamma\\)\uc758 \uac12\uc740 \ub9e4\uccb4\uc758 \ud2b9\uc131\uc5d0 \ub530\ub77c \ub2ec\ub77c\uc9c0\uba70, \uc77c\ubc18\uc801\uc73c\ub85c \ub2e4\uc74c\uacfc \uac19\uc740 \uacf5\uc2dd\uc73c\ub85c \uacc4\uc0b0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

\\[ \\gamma = \\alpha + j\\beta \\]<\/p>\n

\uc5ec\uae30\uc11c \\(\\alpha\\)\ub294 \uac10\uc1e0 \uc0c1\uc218(attenuation constant)\ub85c, \ub9e4\uccb4\ub97c \ud1b5\uacfc\ud558\uba74\uc11c \ud30c\ub3d9\uc774 \uc5bc\ub9c8\ub098 \uc57d\ud574\uc9c0\ub294\uc9c0\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \\(\\beta\\)\ub294 \uc704\uc0c1 \uc0c1\uc218(phase constant)\ub85c, \ud30c\ub3d9\uc758 \uc704\uc0c1\uc774 \uc5bc\ub9c8\ub098 \ube68\ub9ac \ubcc0\ud558\ub294\uc9c0\ub97c \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \uc774 \ub450 \ud30c\ub77c\ubbf8\ud130\ub294 \ubaa8\ub450 \uc8fc\ud30c\uc218\uc640 \ub9e4\uccb4\uc758 \ubb3c\ub9ac\uc801, \ud654\ud559\uc801 \ud2b9\uc131\uc5d0 \uc758\uc874\ud569\ub2c8\ub2e4.<\/p>\n

\uac10\uc1e0 \uc0c1\uc218 \\(\\alpha\\)\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \uc8fc\uc5b4\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

\\[ \\alpha = \\frac{\\omega}{c} \\sqrt{\\frac{(\\mu \\epsilon – \\frac{1}{\\mu \\epsilon})^2}{4} + j\\sigma \\mu\\epsilon} \\]<\/p>\n

\uc5ec\uae30\uc11c \\(\\omega\\)\ub294 \uac01 \uc8fc\ud30c\uc218, \\(c\\)\ub294 \ube5b\uc758 \uc18d\ub3c4, \\(\\mu\\)\ub294 \ub9e4\uc9c8\uc758 \ud22c\uc790\uc728, \\(\\epsilon\\)\ub294 \ub9e4\uc9c8\uc758 \uc720\uc804\uc728, \uadf8\ub9ac\uace0 \\(\\sigma\\)\ub294 \ub9e4\uc9c8\uc758 \uc804\ub3c4\ub3c4\uc785\ub2c8\ub2e4. \uc704\uc0c1 \uc0c1\uc218 \\(\\beta\\)\ub294 \ub2e4\uc74c\uacfc \uac19\uc774 \ud45c\ud604\ub420 \uc218 \uc788\uc2b5\ub2c8\ub2e4:<\/p>\n

\\[ \\beta = \\frac{\\omega}{c} \\sqrt{\\frac{(\\mu \\epsilon + \\frac{1}{\\mu \\epsilon})^2}{4} + j\\sigma \\mu\\epsilon} \\]<\/p>\n

\uc804\ud30c \uc0c1\uc218\uc758 \uc751\uc6a9<\/h2>\n

\uc804\ud30c \uc0c1\uc218\ub294 \ub2e4\uc591\ud55c \ubd84\uc57c\uc5d0\uc11c \uc751\uc6a9\ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4, \ud1b5\uc2e0 \uc2dc\uc2a4\ud15c \uc124\uacc4\uc5d0\uc11c\ub294 \uc2e0\ud638\uac00 \uc804\uc1a1 \ub9e4\uccb4\ub97c \ud1b5\uacfc\ud560 \ub54c\uc758 \uc190\uc2e4\uc744 \ucd5c\uc18c\ud654\ud558\uae30 \uc704\ud574 \uc774 \uac12\uc744 \uacc4\uc0b0\ud574\uc57c \ud569\ub2c8\ub2e4. \ub610\ud55c, \uc804\ud30c \uc0c1\uc218\uc758 \uac12\uc740 \uc548\ud14c\ub098 \uc124\uacc4\uc5d0\ub3c4 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4. \uc548\ud14c\ub098\uc758 \uae38\uc774\uc640 \ubaa8\uc591\uc740 \\(\\beta\\)\uc5d0 \ub530\ub77c \uc870\uc815\ub418\uc5b4\uc57c \ud558\uba70, \uc774\ub294 \ubc29\uc0ac \ud328\ud134\uacfc \uc774\ub4dd\uc5d0 \uc9c1\uc811\uc801\uc778 \uc601\ud5a5\uc744 \ubbf8\uce69\ub2c8\ub2e4.<\/p>\n

RFID(Radio Frequency Identification) \uc2dc\uc2a4\ud15c\uacfc \uac19\uc740 \ubb34\uc120 \uc2e0\ud638 \uae30\ubc18\uc758 \uae30\uc220\uc5d0\uc11c \uc804\ud30c \uc0c1\uc218\ub294 \ud0dc\uadf8\uc640 \ub9ac\ub354 \uc0ac\uc774\uc758 \ud1b5\uc2e0 \ud488\uc9c8\uc744 \uacb0\uc815\ud558\ub294 \ub370 \uc911\uc694\ud55c \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774\uc678\uc5d0\ub3c4 \uc9c0\ud558 \uc790\uc6d0 \ud0d0\uc0ac, \uc758\ub8cc \uc601\uc0c1 \uc9c4\ub2e8, \ubb34\uc120 \ub124\ud2b8\uc6cc\ud0b9 \ub4f1 \ub2e4\uc591\ud55c \uacf5\ud559\uc801 \uc751\uc6a9\uc5d0 \uc804\ud30c \uc0c1\uc218\uac00 \uc911\uc694\ud55c \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4.<\/p>\n

\uacb0\ub860<\/h2>\n

\uc804\ud30c \uc0c1\uc218\ub294 \uc804\uc790\uae30\ud30c\uc758 \uc804\ud30c \ud2b9\uc131\uc744 \uc774\ud574\ud558\uae30 \uc704\ud55c \ud544\uc218\uc801\uc778 \uc694\uc18c\uc785\ub2c8\ub2e4. \uc774 \uac12\uc744 \uc815\ud655\ud788 \uacc4\uc0b0\ud558\uace0 \uc801\uc6a9\ud558\ub294 \uac83\uc740 \uc2e0\ud638\uc758 \ud488\uc9c8\uc744 \uc720\uc9c0\ud558\uace0, \ud6a8\uacfc\uc801\uc778 \ud1b5\uc2e0 \uc2dc\uc2a4\ud15c\uc744 \uc124\uacc4\ud558\ub294 \ub370 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \ub530\ub77c\uc11c \uc804\uae30\uacf5\ud559, \ud1b5\uc2e0\uacf5\ud559, \ubb3c\ub9ac\ud559 \ub4f1 \uad00\ub828 \ubd84\uc57c\uc5d0\uc11c \uc804\ud30c \uc0c1\uc218\uc758 \uc774\ud574\ub294 \uae30\ubcf8\uc801\uc774\uba74\uc11c\ub3c4 \ud544\uc218\uc801\uc778 \uc9c0\uc2dd\uc774 \ub429\ub2c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"

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