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1. WO2020138194 - WAVE ABSORBER

Publication Number WO/2020/138194
Publication Date 02.07.2020
International Application No. PCT/JP2019/050884
International Filing Date 25.12.2019
IPC
H01Q 17/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
17Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
H05K 9/00 2006.01
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
9Screening of apparatus or components against electric or magnetic fields
B32B 7/025 2019.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
7Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
02Physical, chemical or physicochemical properties
025Electric or magnetic properties
CPC
B32B 7/025
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
7Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
02Physical, chemical or physicochemical properties
025Electric or magnetic properties
H01Q 17/00
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
17Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
H05K 9/00
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
9Screening of apparatus or components against electric or magnetic fields
Applicants
  • 積水化学工業株式会社 SEKISUI CHEMICAL CO., LTD. [JP]/[JP]
Inventors
  • 武藤 勝紀 MUTOU, Katsunori
  • 中尾 幸子 NAKAO, Sachiko
  • 林 秀樹 HAYASHI, Hideki
Agents
  • 特許業務法人三枝国際特許事務所 SAEGUSA & PARTNERS
Priority Data
2018-24106925.12.2018JP
2018-24107425.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) WAVE ABSORBER
(FR) ABSORBEUR D'ONDES
(JA) 電波吸収体
Abstract
(EN)
The present invention addresses the problem of providing a wave absorber that has a good wave absorption property with respect to diagonal incidence, particularly diagonal incidence of radio waves around 79 GHz. The problem is solved by a wave absorber wherein, according to TM polarization measurement of 45° incidence (characteristic A), the absorption range with absorption performance of 15 dB or more in a frequency band of 75 to 85 GHz is 4 GHz or higher, and/or, according to TE polarization measurement of 45° incidence (characteristic B), the absorption range with absorption performance of 15 dB or more in a frequency band of 75 to 85 GHz is 4 GHz or higher.
(FR)
La présente invention aborde le problème de la fourniture d'un absorbeur d'ondes qui présente une bonne propriété d'absorption d'ondes en ce qui concerne une incidence diagonale, en particulier une incidence diagonale d'ondes radio autour de 79 GHz. Le problème est résolu par un absorbeur d'ondes dans lequel, selon une mesure d'incidence à 45° en polarisation TM (caractéristique A), la plage d'absorption ayant une performance d'absorption de 15 dB ou plus dans une bande de fréquence de 75 à 85 GHz est de 4 GHz ou plus, et/ou, selon une mesure d'incidence à 45° en polarisation TE (caractéristique B), la plage d'absorption ayant une performance d'absorption de 15 dB ou plus dans une bande de fréquence de 75 à 85 GHz est de 4 GHz ou plus.
(JA)
斜め入射、特に、79GHz付近の電波の斜め入射に対する電波吸収性が良好な電波吸収体を提供することを課題とし、該課題を(特性A)45°入射のTM偏波測定において、周波数帯域75~85GHzにおける吸収性能15dB以上の吸収範囲が4GHz以上である、及び/又は(特性B)45°入射のTE偏波測定において、周波数帯域75~85GHzにおける吸収性能15dB以上の吸収範囲が4GHz以上である、電波吸収体、により解決する。
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