To prevent variation in a radio wave reflection amount among components.SOLUTION: A dielectric member 1a includes a substrate 10a and a coated layer 20a. The substrate 10a is 1.0 to 10.0 mm thick, and has a dielectric constant of 1.01 to 4.0. The substrate 10a includes a first principal plane 10f and a second principal plane 10s. The coated layer 20a is 1.0 mm thick or less and has a dielectric constant of 3.0 or more. The coated layer 20a coats a first principal plane 10f. The substrate 10a includes a main body part 11. When the main body part 11 is divided into n pieces in a thickness direction of the substrate 10a, a laminar part 11d of the n pieces of the main body part 11 satisfies a condition εBi<εB(i+1). The εBi is a dielectric constant of the laminar part 11d arranged at an i-th position from the second principal plane 10s to the first principal plane 10f, and the εB(i+1) is a dielectric constant of the laminar part 11d arranged at an i+1 th position.SELECTED DRAWING: Figure 1

    【課題】部材間で電波反射量がばらつくことを防止する。【解決手段】誘電性部材1aは、基材10aと、被覆層20aとを備える。基材10aは、1.0mm以上10.0mm以下の厚みを有するとともに1.01以上4.0以下の比誘電率を有する。基材10aは、第一主面10f及び第二主面10sを有する。被覆層20aは、1.0mm以下の厚みを有するとともに3.0以上の比誘電率を有する。被覆層20aは、第一主面10fを覆っている。基材10aは、本体部11を含む。基材10aの厚み方向において本体部11をn分割するとき、本体部11のn個の層状の部分11dは、εBi<εB(i+1)の条件を満たす。εBiは、第二主面10sから第一主面10fに向かってi番目に配置された層状の部分11dの比誘電率であり、εB(i+1)は、i+1番目に配置された層状の部分11dの比誘電率である。【選択図】図1


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    Title :

    DIELECTRIC MEMBER, VEHICULAR BUMPER, RADAR SYSTEM, RADIO WAVE REFLECTION PREVENTION MEMBER AND RADIO WAVE REFLECTION PREVENTION UNIT


    Additional title:

    誘電性部材、車両用バンパー、レーダーシステム、電波反射防止部材、及び電波反射防止ユニット


    Contributors:

    Publication date :

    2021-10-11


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01S RADIO DIRECTION-FINDING , Funkpeilung / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H01Q Antennen , ANTENNAS, i.e. RADIO AERIALS



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