ᮾᛴᘓタᢏ⾡◊✲ᡤሗ No.39
東急建設技術研究所報No.39

U.D.C 537.87

㟁Ἴᬯᐊࢆά⏝ࡋࡓᘓ⠏ᮦᩱࡢ㟁Ἴ㏱㐣≉ᛶホ౯
電波暗室を活用した建築材料の電波透過特性評価
㸫RC ቨࢆ⏝࠸ࡓᐇ ⤖ᯝ࡜ FEM ゎᯒ⤖ᯝࡢẚ㍑㸫

U.D.C 537.87− RC 壁を用いた実測結果と FEM 解析結果の比較−＊㸨
渡辺 Ώ㎶
拓人＊ᣅே
川瀬隆治
ᕝ℩㝯἞㸨せ ⣙㸸  ᮏሗ࿌࡛ࡣ㸪ᢏ⾡◊✲ᡤ࡟᪂タࡋࡓ EMC ヨ㦂ᐊ࡟࠾ࡅࡿᘓ⠏ᮦᩱࡢ㟁Ἴ㏱㐣≉ᛶࡢホ౯ἲ㸪ࡉࡽ࡟ᐇ㝿࡟ヨసࡋࡓ RC ቨヨ㦂యࡢ㟁Ἴ㏱㐣≉ᛶࡢᐇ⤖ᯝཬࡧࢩ࣑࣮ࣗࣞࢩࣙࣥ஦౛࡟ࡘ࠸࡚⤂௓ࡍࡿࠋᮏ᪋タࡣ㸪2 ࡘࡢ㟁Ἴᬯᐊ㛫ࡢ௙ษࡾቨ࡟㛤ཱྀࢆタࡅ࡚࠾ࡾ㸪ࡇࡢ㛤ཱྀ࡟ྛ✀ࡢᘓᮦࢆྲྀࡾ௜ࡅ࡚㟁Ἴ㏱㐣≉ᛶࡢホ౯ࢆ⾜࠺ࡇ࡜ࡀ࡛ࡁࡿ≉Ṧ࡞㟁Ἴᬯᐊ࡛࠶ࡿࠋࡇࡇ࡛ࡣ㸪ࡇࡢ㛤ཱྀࢆ⏝࠸ࡓྛ✀ᘓᮦࡢ㟁Ἴ㏱㐣≉ᛶࡢホ౯ἲཬࡧ཯ᑕࡢ᭷↓ࡀᐃ⎔ቃࡀ㐺ษ࡛࠶ࡿࡇ࡜ࢆ᳨ドࡍࡿࡓࡵ࡟㸪ࡲࡎ㛤ཱྀ࿘ᅖ࡟࠾ࡅࡿ㟁Ἴࡢᐃ⤖ᯝ࡟ཬࡰࡍᙳ㡪࡟ࡘ࠸࡚᭷㝈せ⣲ゎᯒࣔࢹࣝࢆ⏝࠸ࡓࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡿ᳨ドࢆ⾜ࡗࡓࠋḟ࡟㸪୍౛࡜ࡋ࡚ᐇ㝿࡟ヨసࡋࡓ RC ቨヨ㦂యࡢ㟁Ἴ㏱㐣≉ᛶ࡟ࡘ࠸࡚ᐇࢩࣙࣥ⤖ᯝ࡜ᐇࢆ⾜࠸㸪ྠヨ㦂యࡢ᭷㝈せ⣲ࣔࢹࣝࢆᵓ⠏ࡍࡿࡇ࡜࡛ࢩ࣑࣮ࣗࣞ

⤖ᯝࡢẚ㍑᳨ドࢆ⾜ࡗࡓ⤖ᯝ㸪ᴫࡡ 5dB ⛬ᗘ௨ෆࡢㄗᕪ⠊ᅖ࡛ᐇ್ࢆ᥎ᐃ࡛ࡁࡿࡇ࡜ࢆ᫂ࡽ࠿࡟ࡋࡓࠋ㺕㺎㺺㺎㺢㺼㸸  㟁Ἴᬯᐊ㸪㛤ཱྀ㒊㸪RC ቨ㸪㟁Ἴ㏱㐣≉ᛶ㸪᭷㝈せ⣲ἲ┠ ḟ㸸  ࡣࡌࡵ࡟                      5& ቨヨ㦂యࡢ㟁Ἴ㏱㐣≉ᛶࡢᐇ⤖ᯝ࡜ )(0 ゎᯒ⤖ᯝࡢẚ㍑

     ᖹᯈᮦᩱࡢ㟁Ἴ㏱㐣≉ᛶホ౯ἲ           ࡲ࡜ࡵ     㟁Ἴᬯᐊ㛫㛤ཱྀ㒊ࡢ྾཰య᭷↓࡟ࡼࡿᙳ㡪᳨ド                  ࡣࡌࡵ࡟ࡋ࠿ࡋ࡞ࡀࡽ㸪RC ቨࢆࡣࡌࡵ࡜ࡍࡿᘓ⠏ᮦᩱࡢホ౯ᘓ⠏ᮦᩱ࡟࠾࠸࡚㸪㟁Ἴࡢ㏱㐣≉ᛶࢆ⢭ᗘⰋࡃィࢆ⾜࠺ࡓࡵ࡟ࡣ㸪ࡇࡢ㔜㔞࡟⪏࠼࠺ࡿᛶ⬟ࢆᣢࡘቨ㠃ࡍࡿࡇ࡜ࡣ㸪ᘓ≀ෆࡢ㟁Ἴ⎔ቃࢩ࣑࣮ࣗࣞࢩࣙࣥࡸ㸪㛤ཱྀࡀᚲせ࡜࡞ࡿࠋGHz ᖏࡢ㟁Ἴࢆྲྀࡾᢅ࠺࣐࢖ࢡࣟᘓ≀⮬యࡢࢩ࣮ࣝࢻᛶ⬟ࢆணࡍࡿୖ࡛᭷ຠ࡛࠶ࡿࠋἼศ㔝࡛ࡣ㸪୺࡟ⓎἻ⣔ᮦᩱ࡟ᦆኻᮦᩱࢆΰྜࡋࡓࣆ≉࡟㸪୍⯡ⓗ࡟ᘓ≀ᵓ㐀✀ࡢ୰࡛ࡶከࡃ᥇⏝ࡉࢀࡿ RC࣑ࣛࢵࢻᆺ㟁Ἴ྾཰యࡸࢩ࣮ࢺ≧ࡢ㟁Ἴ྾཰యࡀホ౯㐀ࡣホ౯ᑐ㇟࡜ࡋ࡚㔜せ࡛࠶ࡾ㸪ྛᒃᐊࢆ௙ษࡿ RCᑐ㇟࡜ࡉࢀ࡚ࡁࡓࡓࡵ㸪ࡇࡢࡼ࠺࡞㔜㔞࡟⪏࠼࠺ࡿᘓ㐀ࡢ⪏ຊቨࡸ㛫௙ษࡾቨࡢ㟁Ἴ㏱㐣≉ᛶࡣࡇࢀࡲ࡛࡟ᮦホ౯⏝ࡢቨ㠃㛤ཱྀࡣᚲせ࡜ࡉࢀ࡚ࡇ࡞࠿ࡗࡓࠋࡑࡇ༑ศ࡟ᢕᥱࡉࢀ࡚ࡇ࡞࠿ࡗࡓࠋࡑࡇ࡛㸪ᮏሗ࡛ࡣᐇ≀࡛㸪ᢏ⾡◊✲ᡤ࡟᪂タࡋࡓ EMC ヨ㦂ᐊ࡛ࡣ㸪᭱኱኱ࡢ RC ቨࡢヨ㦂యࢆ〇సࡋホ౯ࢆ⾜ࡗࡓࠋ

500kg ࡢヨ㦂యࡀタ⨨ྍ⬟࡞㛤ཱྀࢆഛ࠼㸪ࡑࡢ㛤ཱྀࢧ࢖୍⯡ⓗ࡟ᖹᯈ≧ࡢᮦᩱࢆ㏱㐣ࡍࡿ㟁Ἴࡢィࢆ⾜࠺ࢬࡶヨ㦂యᑍἲ࡟ྜࢃࡏ࡚ 0.6m0.6m㸪0.8m0.8m㸪

ࡓࡵ࡟ࡣ㸪ᅗ 1 ࡟♧ࡍࡼ࠺࡟㸪㔠ᒓᯈ༢యࡲࡓࡣ㔠ᒓ

1.8m1.8m ࡢ 3 ࣃࢱ࣮ࣥ࡟ኚ໬ࡉࡏࡿࡇ࡜ࡀ࡛ࡁࡿࠋᯈࡢ⾲㠃࡟ྛ✀ࡢ㟁Ἴ྾཰యࢆ㈞ࡾ௜ࡅࡓቨ㠃࡟㛤୍ཱྀ⯡ⓗ࡟㟁Ꮚᶵჾࡢ࢚࣑ࢵࢩࣙࣥホ౯࡟⏝࠸ࡿ EMC 㟁ࢆタࡅ㸪Ἴᬯᐊࡸ࢔ࣥࢸࢼࡢᨺᑕࣃࢱ࣮ࣥࡢホ౯➼࡟⏝࠸ࡿ࣐ᐃᑐ㇟࡜ࡍࡿヨ㦂య㸦ヨᩱ㸧ࢆ㛤ཱྀ࡟タ⨨ࡍࡿ᪉ἲࡀ࡜ࡽࢀ࡚࠸ࡿ 1)ࠋ

࢖ࢡࣟἼ㟁Ἴᬯᐊ࡜኱ࡁࡃ␗࡞ࡿⅬࡣ㸪ࡇࡢ㛤ཱྀࢆഛ࠼࡚࠸ࡿⅬ࡜㸪㛤ཱྀࢆ㝸࡚࡚ 2 ࡘࡢ㟁Ἴᬯᐊࢆ㞄᥋ࡉ

PyramidalabsorberࡏࡓⅬ࡛࠶ࡿࠋᮏሗ࡛ࡣ㸪RC ቨࢆࡣࡌࡵ࡜ࡍࡿྛ✀ᘓᮦࡢホ౯ࢆ⾜Metal plate࠺ୖ࡛㸪ࡇࡢᮏホ౯⣔ࡢጇᙜᛶࢆ᳨ドࡍࡿࡓࡵ࡟㸪ࡲ

Ferrite tilesࡎ㸪㛤ཱྀ࡟࠾ࡅࡿ㟁Ἴࡢ཯ᑕᙳ㡪ࡀ

Test boardᐃ⤖ᯝ࡟ཬࡰࡍᙳ㡪࡟ࡘ࠸᳨࡚ドࢆ⾜ࡗࡓࠋḟ࡟୍౛࡜ࡋ࡚㸪ᐇ㝿࡟ヨసࡋࡓ RC ቨヨ㦂యࡢ㟁Ἴ㏱㐣≉ᛶࢆᐇࡋ㸪ేࡏ࡚᭷㝈せ⣲ἲ࡟ࡼࡿࣔࢹࣜࣥࢢࢆ⾜࠸ࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡿᐇ
್࡜ࡢẚ㍑᳨ドࢆ⾜ࡗࡓᖹᯈᮦᩱࡢ㟁Ἴ㏱㐣≉ᛶホ౯ἲ୍⯡࡟㸪㟁Ἴ㏱㐣≉ᛶࡢホ౯ࢆ⾜࠺ሙྜ࡟ࡣ

ᐃ⣔

ࡣᅗ 2 ࡟♧ࡍࡼ࠺࡟ᵓᡂࡉࢀ㸪ࢿࢵࢺ࣮࣡ࢡ࢔ࢼࣛ࢖
(a)

(b)

ࢨ(NA)࠿ࡽ㏦ಙࡉࢀࡓಙྕࡣ࢔ࣥࢸࢼ 1 ࠿ࡽᨺᑕࡉࢀ(c)ࡿࠋࡑࡋ࡚㸪㛤ཱྀࢆ㝸࡚ࡓ࢔ࣥࢸࢼ 2 ࡛ཷಙࡋ෌ࡧ NAᅗ 1 ᘓᮦホ౯⏝㛤ཱྀ㒊ࡢ✀㢮࡟ධຊࡉࢀࡿࠋࡇࡇ࡛㸪ᘓᮦࢆタ⨨ࡋࡓሙྜ㸪ཬࡧఱ* 技術研究所 音響・電磁環境グループ
ᢏ⾡◊✲ᡤ
㡢㡪࣭㟁☢⎔ቃࢢ࣮ࣝࣉ

79
79

東急建設技術研究所報No.39

ࡶ㓄⨨ࡋ࡞࠸ሙྜࡢ᮲௳࡛ࡑࢀࡒࢀ

ᐃࢆ⾜࠸୧⪅ࡢ2O(1200)ẚࢆ࡜ࡗ࡚㸪㏱㐣ῶ⾶⋡ࢆᐃ⩏ࡍࡿࠋ

Metal plate(t =10)Absorbing layerලయⓗ࡟ࡣ㸪ձఱࡶ㓄⨨ࡋ࡞࠸ሙྜࡢ㏱㐣⋡ T1 ࢆ㸪
NA ࠿ࡽ㏦ಙࡉࢀࡿ㟁ຊ Pt ࡜ NA ࡟ᡠࡗ࡚ࡃࡿཷಙ㟁ຊ Pr ࡜ࡢẚ࡜ࡋ࡚㸪T1=Pr1/Pt1 ࡜ᐃ⩏ࡍࡿࠋղྠᵝ࡟㸪ᘓᮦࢆ㓄⨨ࡋࡓሙྜࡢ㏱㐣⋡ T2= Pr2/Pt2 ࢆࡑࢀࡒࢀO

Tx.
2O(1200)

ᐃO(600)ࡍࡿࠋճ᭱⤊ⓗ࡟㸪ఱࡶ㓄⨨ࡋ࡞࠸ሙྜࡢ㏱㐣⋡ T1 ࢆLRx.

O

O(600)L

O/2 dipole(500MHz)ᇶ‽(100%)࡜ࡋ㸪㏱㐣ῶ⾶⋡ࡣ T2/T1 ࡜ࡋ࡚ᚓࡿࡇ࡜ࡀ࡛ࡁࡿࠋ

ὉAbsorbing boundaryorEM-wave absorberὉReflection boundary

Test board or Air

unit: mmᅗ 3 㛤ཱྀ㒊ࡢゎᯒࣔࢹࣝAnt. 2

Ant. 1


d2

d1

Test board

AirPr2
Pt2

T1 =T2 =@500MHz) ࡜ࡋ㸪࢔ࣥࢸࢼ࢚࣓ࣞࣥࢺࢆᆶ┤᪉ྥ࡟㓄

Transmission
attenutionTransmissionゎᯒ⤖ᯝᅗ 3 ࡢゎᯒࣔࢹࣝ࡟࠾ࡅࡿ㊥㞳 L ࢆ 1Ȣ(=600mmPr1Pt1⨨ࡋࡓሙྜ࡟࠾࠸࡚㸪㛤ཱྀ㒊ࡢ྾཰ᒙࡀ᭷ࡿሙྜ࡜↓࠸ሙྜࡢ㟁⏺ศᕸࡢẚ㍑ࢆᅗ 4 ࡟♧ࡍࠋ

T2T1

ᅗ 4 ࡼࡾ㸪྾཰ᒙࡀ࠶ࡿሙྜ࡛ࡣ㏦ಙഃࡢ㟁⏺ศᕸࡀ➼᪉ⓗ࡟ᗈࡀࡗ࡚࠾ࡾ㸪࿘ᅖࡢ཯ᑕࡀ࡞࠸ࡇ࡜ࡀศ
࠿ࡿࠋ୍᪉㸪྾཰ᒙࡀ↓࠸ሙྜ࡛ࡣ㸪㛤ཱྀ㒊࠿ࡽࡢ཯Pr (W)
ReceiveNA(Network Analyzer)

ᅗ 2

Pt (W)
Transmitᑕ࡟ࡼࡾᐃᅾἼࡀⓎ⏕ࡋ㸪ศᕸࡀṍࢇ࡛࠸ࡿᵝᏊࡀ☜ㄆ࡛ࡁࡿࠋAbsorbing layerᐃ⣔ࡢࣈࣟࢵࢡᅗ
㟁Ἴᬯᐊ㛫㛤ཱྀ㒊ࡢ྾཰య᭷↓࡟ࡼࡿᙳ㡪᳨ドゎᯒࣔࢹࣝ

ᅗ 1 ࡟♧ࡋࡓ (a)ࡢࡼ࠺࡟㛤ཱྀ࿘ᅖࢆ㔠ᒓࡢቨ㠃࡜ࡍࡿᵓᡂࡀ᭱ࡶ⡆᫆࡞᪉ἲ࡛࠶ࡿࡀ㸪ቨ㠃࡛཯ᑕࡍࡿ㟁
Ἴࡀ㏦ಙഃࡢᐊෆ࡛ከ㔜཯ᑕࢆ⧞ࡾ㏉ࡋ㸪ពᅗࡏࡎ㛤
ཱྀࢆ㏱㐣ࡍࡿἼࡢᙳ㡪ࢆཝᐦ࡟⪃៖ࡍࡿሙྜ㸪(b)ࡢࡼ
࠺࡟㛤ཱྀ࿘ᅖ࡟྾཰యࢆタ⨨ࡍࡿ᪉ἲࡀ࡜ࡽࢀࡿ 2) ࠋ(a) With absorbing layer≉࡟ 1GHz ௨ୗࡢ MHz ᖏ࡛ࡣ㸪(c)࡟♧ࡍࡼ࠺࡟㸪౛࠼

ᅗ 4 ྾཰ᒙࡢ᭷↓࡟ࡼࡿ㟁⏺ศᕸẚ㍑

せ࡜࡞ࡿࡀ㸪ࣇ࢙ࣛ࢖ࢺࢱ࢖ࣝࡣ㧗౯࡛࠶ࡿୖ࡟㸪ቨ0㠃࡟㝽㛫࡞ࡃ᪋ᕤࡍࡿ⢭ᗘࡀせồࡉࢀࡿࠋࡑࡇ࡛㸪ᘓ

-20ཬࡰࡍᙳ㡪࡟ࡘ࠸࡚ホ౯ࢆ⾜ࡗࡓࠋᮏሗ࡛ࡣᐇ㝿ࡢ᪋-40

ࡢ㈝⏝࡜ປຊࢆ⪃៖ࡋ㸪ゎᯒ࡟ࡼࡗ࡚྾཰య᭷↓ࡢᙳ㡪᳨ドࢆ⾜ࡗࡓࠋᅗ 3 ࡟ゎᯒࣔࢹࣝࢆ♧ࡍࠋゎᯒ✵㛫ෆ㒊ࡢ⾲㠃࡟ᑐࡋ࡚྾཰ቃ⏺᮲௳ࢆ㐺⏝ࡍࡿࡇ࡜࡛㸪✵㛫ෆ㒊࡟࠾ࡅࡿ㟁Ἴࡢ཯ᑕࡀ↓࠸⌮᝿ⓗ࡞ 6 㠃㟁Ἴᬯᐊ࡜ྠࡌ᮲௳

Transmission (dB)( )

ᐃ⤖ᯝ࡬

ᕤ࡜ᐇ

L=2O
L=1O-60-80

L=3O-100

With absorbing layer-120

Without absorbing layer࡜ࡋࡓࠋ㛤ཱྀ㒊ࡣཌࡳ 10mm ࡢ㔠ᒓᯈ࡛ᵓᡂࡋ㸪ࡑࡢ㛤ཱྀ࿘ᅖ࡟ゎᯒୖ⌮᝿ⓗ࡞྾཰య࡜ࡋ࡚స⏝ࡍࡿ྾཰-140ᒙ㸦ቃ⏺᮲௳࡛⾲⌧㸧ࢆタࡅࡓሙྜ࡜྾཰ᒙࡀ↓࠸ሙ

-160
0200

ྜ࡟࠾࠸࡚㸪࢔ࣥࢸࢼ㛫ࡢ㟁Ἴ㏱㐣≉ᛶࢆゎᯒࡍࡿࡇ࡜࡛ඛ࡟ᅗ 1 ࡟♧ࡋࡓ㛤ཱྀ㒊ࡢ྾཰య᭷↓ࡀ

0E-field [V/m]ࡤࣇ࢙ࣛ࢖ࢺࢱ࢖ࣝࡢࡼ࠺࡞ MHz ᖏᑐᛂࡢ྾཰యࡀᚲᮦホ౯⏝ࡢ㛤ཱྀ㒊࡟⏝࠸ࡿ྾཰యࡢ᭷↓ࡀ(b) Without absorbing layer
1020400

600

800

Frequency (MHz)ᐃ⤖ᯝᅗ 5࡬ཬࡰࡍᙳ㡪࡟ࡘ࠸᳨࡚ドࡋࡓࠋ80/ ࡢኚ໬࡟ࡼࡿ㏱㐣≉ᛶࡢẚ㍑

1000

東急建設技術研究所報No.39

ࡋ࠿ࡋ㸪㛤ཱྀࢆ㏱㐣ࡋࡓἼ࡟╔┠ࡍࡿ࡜㸪୧⤖ᯝ࡜ࡶྠᵝࡢศᕸࢆ♧ࡍᵝᏊࡀ☜ㄆ࡛ࡁࡿࠋḟ࡟㸪୍౛࡜ࡋ࡚ L=1Ȣ, 2Ȣ, 3Ȣ࡜ࡋࡓሙྜࡢ㏦ཷಙ࢔ࣥࢸࢼ㛫ࡢ㟁Ἴ㏱㐣≉ᛶࡢẚ㍑ࢆᅗ 5 ࡟♧ࡍࠋࡇࡢ⤖ᯝࡼࡾ㸪Lࡢኚ໬࡟ᑐࡋ࡚㸪࠸ࡎࢀࡢ⤖ᯝࡶ྾཰ᒙ᭷↓࡟ࡼࡿᕪ␗ࡣᑠࡉ࠸ࡇ࡜ࡀศ࠿ࡿࠋ
5& ቨヨ㦂యࡢ㟁Ἴ㏱㐣≉ᛶࡢᐇ⤖ᯝ࡜ )(0 ゎᯒ⤖ᯝࡢẚ㍑〇 స ࡋ ࡓ RC ቨ ࡢ ヨ 㦂 య ࡣ 㸪 ᑍ ἲ 900×900×200(mm)㸪㕲➽ࡢ㓄⨨ࢆྵࡴヨ㦂యࡢヲ⣽ᑍἲࢆᅗ 6 ࡟♧ࡋ㸪ヨ㦂యࡢྲྀ௜ࡅ≧ἣ࡜㸪タ⨨ᚋࡢ≧ἣࢆᅗ 7 ཬࡧ
ᅗ 6 ᐇ㦂࡟⏝࠸ࡓ 5&ቨヨ㦂యࡢ㓄➽࣭ᑍἲ

ᅗ 8 ࡟ࡑࢀࡒࢀ♧ࡍࠋヨ㦂యࡢ㏱㐣ῶ⾶⋡ࡣ㸪๓㏙ࡢ
ᅗ 2 ࡟♧ࡍ᪉ἲ࡟ࡼࡾ

ᐃࡋࡓࠋࡇࡇ࡛㸪RC ቨࡢ㏱㐣ῶ⾶⋡࡟ࡣ㸪ࢥࣥࢡ࣮ࣜࢺࡢẚㄏ㟁⋡ࡀ኱ࡁࡃᙳ㡪ࡍࡿࠋẚㄏ㟁⋡࡜ࡣ㸪㟁ẼᕤᏛศ㔝࡛ࡣࢥࣥࢹࣥࢧࡢᐜ㔞ࡢ኱ࡁࡉࢆ⾲⌧ࡍࡿࡢ࡟⏝࠸ࡽࢀ㸪✵Ẽࡢሙྜࢆ 1 ࡜ࡋࡓ᫬࡟㸪ࢥࣥࢹࣥࢧࡢ㟁ᴟ㛫࡟඘ሸࡍࡿᮦᩱ࡟ࡼࡗ࡚ᐜ㔞ࡀఱಸ࡟࡞ࡿࡢ࠿ࢆᐃ⩏ࡍࡿ㔞࡛࠶ࡿࠋࡇࡢࡇ࡜ࡣ㸪ㄏ㟁⋡ࡀ㟁⏺࡟స⏝ࡍࡿࡇ࡜࡟ࡼࡿࡶࡢ࡛࠶ࡾ㸪㟁Ἴ࡟ᑐࡋ࡚ࡣ㸪㟁Ἴࡢ
㏻ࡋ᫆ࡉࢆ኱ࡁࡃᕥྑࡍࡿࠋࡍ࡞ࢃࡕ㟁Ἴࡢ཯ᑕ⋡࠾ࡼࡧ㏱㐣⋡ࡣ≀㉁ࡢẚㄏ㟁⋡࡟౫Ꮡࡍࡿ㔞࡛࠶ࡿࠋࡲࡓ㸪ཝᐦ࡟ࡣẚㄏ㟁⋡ࡣ」⣲ᩘ࡛⾲⌧ࡉࢀ㸪」⣲⾲グࡢẚㄏ㟁⋡ࢆ」⣲ẚㄏ㟁⋡࡜࿧ࡪࠋᮏሗ࡛ࡣ㸪௨ୗࡢ᪉ἲ࡟ࡼࡾ」⣲ẚㄏ㟁⋡ࢆ᥎ᐃࡋࡓࠋձ

ᅗ 7 ヨ㦂యࡢྲྀ௜ࡅ≧ἣ」⣲ẚㄏ㟁⋡ࡢᐇ㒊࡜⹫㒊ࡢ⤌ྜࡏࢆᬻᐃⓗ࡟௬ᐃࡋ㸪ࡇࢀ࡟ᑐࡋ࡚ఏ㏦ F ⾜ิࢆ⏝࠸ࡓᬻᐃゎᯒ್ࢆᐇ್ࢆࡶ࡜࡟࿘Ἴᩘẖ࡟ồࡵ㸪ṧᕪ஧஌࿴ࢆồࡵࡿࠋղ」⣲ẚㄏ㟁⋡࡟ᑐࡍࡿṧᕪ஧஌࿴ࢆᐇ㒊࣭⹫㒊࡟
ᑐࡍࡿ 3 ḟඖศᕸ࡜ࡋ࡚ồࡵ㸪ṧᕪ஧஌࿴ࡀ᭱ᑠ࡟࡞ࡿ್ࢆ᭱㐺್࡜ࡋ࡚」⣲ẚㄏ㟁⋡ࢆ᥎ᐃࡋ㸪ゎᯒ࡟᥇⏝ࡍࡿࠋ
(a) ๓㠃         

ఏ㏦ F ⾜ิࢆ⏝࠸ࡓゎᯒ᪉ἲࡣ㸪ࢩ࢙ࣝࢡࣀࣇࡢᘧ࡟ᇶ࡙࠸࡚࠾ࡾ3)㸪᮲௳࡟ࡼࡗ࡚ࡣㄗᕪࡀ኱ࡁࡃ࡞ࡿࠋ᪤ሗ 4) ࡟࠾࠸࡚ࡶᐇ(b) ⫼㠃ᅗ 8 ヨ㦂యタ⨨ᚋࡢᵝᏊ್࡜ࡢᕪ␗ࡀぢࡽࢀࡿሙྜࡀ࠶ẚㄏ㟁⋡ẖ䛾䠢 (ィ⟬್䛸ᐇ ್䛸䛾ṧᕪ஧஌࿴)ࡿࡇ࡜࡞࡝ࢆ♧ࡋࡓࠋࡋ࠿ࡋ㸪ࡇࡇ࡛ࡣ」⣲ẚㄏ㟁⋡᭱㐺್ İr = 7.4 – j 1.0ࢆ᥎ᐃࡍࡿࡓࡵࡢᬻᐃゎᯒ್ࢆィ⟬ࡍࡿ┠ⓗ࡛࠶ࡿࡓࡵ㸪ゎᯒ್࡟ㄗᕪࡀ⏕ࡌ࡚ࡶṧᕪ஧஌࿴ࢆ⧞㏉ࡋィ⟬䠢䠄ṧᕪ஧஌࿴䠅ࡇ࡜ࡀ࡛ࡁࡿࡓࡵ㸪ୖグࡢၥ㢟ࡣ࡞࠸ࡶࡢ࡜⪃࠼ࡽࢀ
ࡿࠋᅗ 9 ࡟㸪௒ᅇࡢゎᯒ࡟⏝࠸ࡓṧᕪ஧஌࿴ࡢ 3 ḟඖศᕸ࡜᭱㐺࡞」⣲ẚㄏ㟁⋡ࡢ᥎ᐃ⤖ᯝࢆ♧ࡍࠋ

100Ͳ200

200

0Ͳ100
100

98.40

㻙㻜㻚㻠

ࡇࡢ᥎ᐃ࡟ࡼࡾᚓࡽࢀࡓ」⣲ẚㄏ㟁⋡ࡢ್ࢆ᥇⏝ࡋ㸪

㻙㻜㻚㻢

7.8
㻙㻜㻚㻤

㻙㻝ɸ䇿
䠄ẚㄏ㟁⋡䛾⹫㒊䠅RC ቨヨ㦂యࣔࢹࣝࡢ᭷㝈せ⣲ἲ࡟ࡼࡿゎᯒࢆ⾜ࡗࡓࠋᐇ200Ͳ300300

ࡋ࡚᭱ᑠ࡟㏆࡙ࡅࡿࡇ࡜࡛㸪᭱⤊ⓗ࡟᭱㐺್ࢆồࡵࡿ࡜ゎᯒࡢ⤖ᯝࢆྜࢃࡏ࡚ᅗ 10 ࡟♧ࡍࠋ

ɸ'

7.2 䠄ẚㄏ㟁⋡䛾ᐇ㒊䠅
㻙㻝㻚㻞

㻙㻝㻚㻠

ᅗ 9 」⣲ẚㄏ㟁⋡ ᐇ㒊࣭⹫㒊 ࡟ᑐࡍࡿṧᕪ஧஌࿴81

東急建設技術研究所報No.39

 ࡲ࡜ࡵᮏሗ࡛ࡣ㸪ᘓ⠏ᮦᩱࡢ㟁Ἴ㏱㐣≉ᛶࡢホ౯ἲ࠾ࡼࡧᐇ࣭ゎᯒ஦౛࡟ࡘ࠸࡚㸪᪂タࡋࡓ EMC ヨ㦂ᐊෆ࡟࠾ࡅࡿᐃ⤖ᯝࢆࡶ࡜࡟⤂௓ࡋࡓࠋᮏ᪋タ࡟࠾ࡅࡿ 2 ࡘࡢ㟁Ἴᬯᐊ㛫ࡢ௙ษࡾቨ࡟タࡅࡓᐇ≀኱ᘓᮦホ౯⏝ࡢ㛤ཱྀ㒊࡟╔┠ࡋ㸪㟁Ἴ㏱㐣≉ᛶࢆホ౯ࡍࡿ㝿ࡢ㛤ཱྀ࿘ᅖቨ㠃࡟࠾ࡅࡿ཯ᑕᙳ㡪࡟ࡘ࠸࡚᭷㝈せ⣲ἲࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡿ᳨ドࢆ⾜ࡗࡓࠋࡑࡢ⤖ᯝ㸪㛤ཱྀ࿘ᅖࢆ⌮᝿ⓗ࡞྾཰య࡛そࡗࡓሙྜ㸪ཬࡧ㛤ཱྀ࿘ᅖࢆ㔠ᒓ㠃㸦཯ᑕ㠃㸧࡜ࡋࡓሙྜ࡟࠾࠸࡚ᴫࡡᕪ␗ࡀ࡞࠸ࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋ
RC ቨヨ㦂యࡢ㟁Ἴ㏱㐣≉ᛶ࡟ࡘ࠸࡚ᐇᅗ  ࢩ࣮ࣝࢻᛶ⬟ࡢᐇ

ᅗ 10 ࡼࡾ㸪ᐇ⤖ᯝ ᐇ⥺ ཬࡧゎᯒ⤖ᯝ ◚⥺ࡗࡓࠋࡑࡢ⤖ᯝ㸪㟁Ἴ㏱㐣≉ᛶࡢᐇ⤖ᯝ࡜ゎᯒ⤖ᯝ

ࡣᴫࡡ 5dB ⛬ᗘ௨ෆ୍࡛⮴ࡍࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡓࠋࡇ

್࡜ゎᯒ್ࡣ 5dB ⛬ᗘ௨ෆࡢᕪ␗

ࡢ⤖ᯝࡼࡾ㸪ఏ㏦ F ⾜ิゎᯒ࡟ࡼࡿᬻᐃゎᯒ್ࢆࡶ࡜୍࡛⮴ࡍࡿࡇ࡜ࡀ☜ㄆ࡛ࡁࡿࠋ࡞࠾㸪⦪㍈ࡢࢩ࣮ࣝࢻ

࡟㟁Ἴ㏱㐣≉ᛶࡢᐇᛶ⬟ࡣ㏱㐣ῶ⾶⋡ࡢ㏫ᩘࢆ࡜ࡗࡓ್࡛࠶ࡿ㸬ࡇࢀࡼࡾ㸪
ఏ㏦ F ⾜ิゎᯒ࡟ࡼࡿᬻᐃゎᯒ್ࢆࡶ࡜࡟ᐇࢆ⾜࠸㸪ేࡏ࡚᭷㝈せ⣲ἲࢩ࣑࣮ࣗࣞࢩࣙࣥ࡟ࡼࡿẚ㍑᳨ドࢆ⾜್࡜ࡢṧᕪ஧஌࿴ࢆồࡵࡿ᪉ἲ࡟ࡼࡗ࡚㸪RC ቨ࡟⏝࠸ࡿࢥࣥࢡ࣮ࣜࢺᮦᩱࡢ᭱㐺࡞」್࡜ࡢ⣲ẚㄏ㟁⋡ࡀ᥎ᐃ࡛ࡁࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋṧᕪ஧஌࿴ࢆồࡵࡿ᪉ἲ࡟ࡼࡗ࡚㸪᭱㐺࡞」⣲ẚㄏ㟁⋡ࡀ᥎ᐃ࡛ࡁࡿྍ⬟ᛶࡀ♧၀ࡉࢀࡓࠋ
ㅰ ㎡ᮏ◊✲ࡢ୍㒊ࡣ㸪㟷ᒣᏛ㝔኱Ꮫࡢᶫᮏಟᩍᤵ࡜ࡢඹྠ◊✲ࡢࡶ࡜⾜ࢃࢀࡓࡶࡢ࡛࠶ࡿࠋࡲࡓ㸪RC ቨࡢヨ㦂యࡢタ⨨సᴗ࡟࠾࠸࡚ከ኱࡞ࡈຓຊࢆ࠸ࡓࡔ࠸ࡓᢏ⾡◊✲ᡤ Ṋ⏣බྖẶ࡟ឤㅰ࠸ࡓࡋࡲࡍࠋཧ⪃ᩥ⊩1㸧㇂ ೺♸, ᶫᮏ ಟ, ኱⇃ ᓫᩥ,͆C ᖏ࡟࠾ࡅࡿ⮬⏤✵㛫㏱㐣Ἴἲ࡟ࡼࡿ Hr, Pr ྠ᫬ᐃἲ͇, 㟁Ꮚ᝟ሗ㏻ಙᏛ఍ㄽᩥㄅ B(㏻ಙ),Vol.J87-B(5), pp.765-768, 2004-05.
2㸧ᒣᮏ ┿୍㑻, ᒾ஭ ㏻, ␊ᒣ ㈼୍,࣐͆࢖ࢡࣟἼᖏ࡟࠾ࡅࡿᯈ≧㐽࡬࠸ᮦࡢ㏱㐣ಀᩘᐃ⿦⨨͇, 㟁Ꮚ᝟ሗ㏻ಙᏛ఍ㄽᩥㄅ B(㏻ಙ),Vol.J94-B(6), pp.771-774, 2011-06.
3㸧➟ᔱ ၿ᠇, ᒣᮌ ඞ๎,͆㟁Ἴࢩ࣮ࣝࢻቨࡢ㏱㐣࣭཯ᑕᦆኻ㔞ࡢィ⟬͇, 㮵ᓥᢏ⾡◊✲ᡤᖺሗ, Vol.48, pp.189-194, 2000.
4㸧ᕝ℩ 㝯἞, ⏣㔝஭ ῟୍, ௚ 2 ྡ,͆㕲➽ࢥࣥࢡ࣮ࣜࢺቨࡢ㟁☢Ἴ㏱㐣࣭཯ᑕᦆኻ࡟㛵ࡍࡿᩘ್ゎᯒ᪉ἲࡢ◊✲͇, ᪥ᮏᘓ⠏Ꮫ఍኱఍Ꮫ⾡ㅮ₇᱾ᴫ㞟(ᮾᾏ), pp.539-540, 2012.

EVALUATION OF EM-WAVE TRANSMISSION CHARACTERISTICS UTILIZING ANECHOICCHAMBER 㸫COMPARING EXPERIMENTAL MEASUREMENT WITH SIMULATED RESULTS
BY FINITE ELEMENT METHOD FOR REINFORCED CONCRETE WALL㸫
T.Watanabe and T.Kawase
In this report, the evaluation method of EM-wave transmission characteristics of construction materials in
EMC(Electro-Magnetic Compatibility) laboratory newly constructed in Institute of Technology, Tokyu Construction Co., Ltd.,is introduced. Moreover examples of simulations and measurement of reinforced concrete are presented. The laboratory isdesigned as laying on the aperture between the two anechoic chambers, and EM-wave transmission characteristics can beevaluated using the aperture. At first, the affections on EM-wave transmission characteristic due to reflected waves from awall surrounding the aperture were simulated. Next, the sample of reinforced concrete was measured and compared with theresult calculated by FEM(Finite Element Method) to demonstrate validity of the measurement method and the environmentof measurement. As a result, the difference between the measurement and the calculation was about up to 5dB.

82