ANTENNA DEVICE AND ELECTRONIC EQUIPMENT INCLUDING ANTENNA DEVICE

PROBLEM TO BE SOLVED: To reduce interference between antenna elements in a second frequency band, without significantly changing discharge characteristics of first and second antenna elements used in first and second frequency bands.SOLUTION: An antenna device has a ground conductor, first and second feeding points arranged while bring separated from each other, a first antenna element connected with the first feeding point and used in a first frequency band, a second antenna element connected with the second feeding point and used in a second frequency band, and a passive element being separated from the surface of the ground conductor and consisting of a conductive member extending along a surface of the ground conductor, and having a first end connected electrically with the ground conductor, and an open second end. A distance from a joint of the first end of the passive element and the ground conductor is smaller than a distance from the joint to the second feeding point, and an electrical length of the passive element is set to a length causing resonance of the passive element in the second frequency band.SELECTED DRAWING: Figure 4 【課題】第１及び第２の周波数帯域に用いられる第１及び第２のアンテナ素子のそれぞれの放射特性を大きく変化させることなく、第２の周波数帯域におけるアンテナ素子間の干渉を低減する。【解決手段】アンテナ装置は、接地導体と、互いに離間して配置された第１及び第２の給電点と、第１の給電点に接続された第１の周波数帯域に用いられる第１のアンテナ素子と、第２の給電点に接続された第２の周波数帯域に用いられる第２のアンテナ素子と、接地導体の表面から離間して配置され接地導体の表面に沿って延びる導電部材からなり、接地導体に電気的に接続された第１端部と、開放された第２端部とを有する無給電素子とを有する。無給電素子の第１端部と接地導体との接続点から第１の給電点までの距離は、前記接続点から第２の給電点までの距離よりも小さく、無給電素子の電気長は、無給電素子が第２の周波数帯域において共振する長さに設定されている。【選択図】図４