VEHICLE ANTENNA DEVICE

• Main Authors: FUNATSU SATOSHI, TANABE HIDETAKA
• Format: Patent
• Language: English; Japanese
• Published: 30.11.2022
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

To provide a vehicle antenna device that suppresses reduction in reception sensitivity of an antenna on the basis of wiring of electronic equipment when the electronic equipment and the antenna are arranged close to each other.SOLUTION: A vehicle antenna device 100 includes electronic equipment 30, an antenna 40 arranged near the electronic equipment 30 and transmitting and receiving radio waves in a predetermined frequency band, a transmission line 50 that connects the electronic equipment 30 and an ECU 60 installed in a vehicle, a stub 70 which is a conductor connected to the electronic equipment 30 and having a predetermined length LS. The length LS of the stub 70 is set according to the length of the transmission line 50 so as to suppress a decrease in the antenna gain of radio waves included in the frequency band transmitted and received by the antenna 40.SELECTED DRAWING: Figure 1 【課題】電子機器とアンテナとが近接して配置されたときに、電子機器の配線に基づく、アンテナの受信感度の低減を抑制する車両用アンテナ装置を提供すること。【解決手段】車両用アンテナ装置１００は、電子機器３０と、電子機器３０の近傍に配置され、所定周波数帯の電波を送受するアンテナ４０と、電子機器３０と車両に設置されるＥＣＵ６０とを接続する伝送線路５０と、電子機器３０と接続し、所定の長さＬＳを有する導体であるスタブ７０と、を備える。スタブ７０の長さＬＳは、伝送線路５０の長さに応じて、アンテナ４０が送受する周波数帯に含まれる電波のアンテナ利得の低下を抑制するように設定される。【選択図】図１