ANTENNA DEVICE

• Main Author: KANEKO TSUTOMU
• Format: Patent
• Language: English; Japanese
• Published: 12.12.2023
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

To provide an antenna device capable of realizing an isolation of 20 dB while maintaining a miniaturization.SOLUTION: An antenna device comprises: a first outer antenna element 2 and a first inner side antenna element 3 in a semicircular arc shape, formed in one surface of an insulation substrate 1 in a same core shape; a second outer side antenna element 19 and a second inner side antenna element 20 in a semicircular arc shape formed on the other surface of the insulation substrate in the same core shape; an antenna side coupling part 17 that is formed in the one surface of the insulation substrate; and a power supply binding part 18 which is formed in a posture reversed in 180 degrees with a coupling part to the other surface of the insulation substrate. The first outer side antenna element and the second outer side antenna element are coupled to an antenna side coupling part via connection lines 4 and 10 and a first through hole 15, and the first inner side antenna element and the second inner side antenna element are coupled to the antenna side coupling part via connection lines 5 and 11 and a second through hole 14.SELECTED DRAWING: Figure 3 【課題】小型化を維持した上で２０ｄＢ以上のアイソレーションを実現することができるアンテナ装置を提供する。【解決手段】アンテナ装置は、絶縁基板１の一面に同心円状に形成された半円弧状の第１の外側アンテナ素子２および第１の内側アンテナ素子３と、絶縁基板の他面に同心円状に形成された半円弧状の第２の外側アンテナ素子１９および第２の内側アンテナ素子２０と、絶縁基板の一面に形成されたアンテナ側結合部１７と、絶縁基板の他面に結合部と１８０度反転する姿勢に形成された給電結合部１８とを備えている。第１の外側アンテナ素子と第２の外側アンテナ素子は接続ライン４，１０と第１スルーホール１５を介してアンテナ側結合部に接合され、第１の内側アンテナ素子と第２の内側アンテナ素子は接続ライン５，１１と第２スルーホール１４を介してアンテナ側結合部に接合されている。【選択図】図３