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1. WO2020067145 - λ/4 TYPE RADIO WAVE ABSORBER

Publication Number WO/2020/067145
Publication Date 02.04.2020
International Application No. PCT/JP2019/037569
International Filing Date 25.09.2019
IPC
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
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
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
Agents
  • 特許業務法人三枝国際特許事務所 SAEGUSA & PARTNERS
Priority Data
2018-17948025.09.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) λ/4 TYPE RADIO WAVE ABSORBER
(FR) ABSORBEUR D'ONDES RADIO DE TYPE λ/4
(JA) λ/4型電波吸収体
Abstract
(EN)
The present invention addresses the problem of providing a λ/4 type radio wave absorber which comprises a supporting body, a resistive film, a dielectric layer and a reflective layer, and which achieves higher radio wave absorption performance. The present invention solves the problem by means of a λ/4 type radio wave absorber which comprises a supporting body, a resistive film, a dielectric layer and a reflective layer, and which satisfies formula (1): -0.375x + 1086.9 < y < -0.375x + 1140 (wherein x represents the resistance of the resistive film; and y represents the value obtained by the formula y = (thickness of supporting body) × (relative dielectric constant of supporting body)0.5 + (thickness of dielectric layer) × (relative dielectric constant of dielectric layer)0.5).
(FR)
La présente invention aborde le problème de la fourniture d'un absorbeur d'ondes radio de type λ/4 qui comprend un corps de support, un film résistif, une couche diélectrique et une couche réfléchissante, et qui permet d'obtenir une meilleure performance d'absorption d'ondes radio. La présente invention résout le problème au moyen d'un absorbeur d'ondes radio de type λ/4 qui comprend un corps de support, un film résistif, une couche diélectrique et une couche réfléchissante, et qui satisfait à la formule (1) : -0,375 x +1086,9 < y < -0,375 x +1140 (où x représente la résistance du film résistif ; et y représente la valeur obtenue par la formule y = (épaisseur du corps de support) × (constante diélectrique relative du corps de support)0,5 + (épaisseur de couche diélectrique) × (constante diélectrique relative de la couche diélectrique)0,5).
(JA)
支持体、抵抗皮膜、誘電体層、及び反射層を有し、且つより高い電波吸収性能を備えるλ/4型電波吸収体を提供することを課題とする。該課題を、支持体、抵抗皮膜、誘電体層、及び反射層を有し、且つ式(1):-0.375x+1086.9 < y <-0.375x+1140(式中、xは抵抗被膜の抵抗値、yは、y=支持体の厚み×(支持体比誘電率)0.5+誘電体層の厚み×(誘電体層の比誘電率)0.5を表す。)を満たす、λ/4型電波吸収体、により解決する。
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