Antenna device and radio apparatus having a broadband characteristic
AssigneeKabushiki Kaisha Toshiba
InventorMasao Teshima
Life of this patent
Estimating the term…
Abstract
An antenna device including a ground plane, a plane conductor and a line conductor is provided. The plane conductor is shaped like a polygon having a first side, a second side and an angle between the first side and the second side. The plane conductor is arranged almost on a same plane as the ground plane. The plane conductor has a feed portion around the angle. The first side faces a side of the ground plane. The line conductor is arranged almost on the same plane as the ground plane. The line conductor has a first end and a second end. The first end is connected to an end of the second side being opposite the feed portion.
Claims20
An antenna device, comprising:
- a ground plane;
- a plane conductor shaped like a polygon having a first side, a second side and an angle between the first side and the second side, the plane conductor arranged almost on a same plane as the ground plane, the plane conductor having a feed portion around the angle, the first side facing a side of the ground plane;
- and
- a line conductor arranged almost on the same plane as the ground plane, the line conductor having a first end and a second end, the first end connected to around an end of the second side being opposite the feed portion.
An antenna device having a first resonant frequency and a second resonant frequency, comprising:
- a ground plane;
- a plane conductor shaped like a polygon having a first side, a second side, a first angle between the first side and the second side and a second angle opposite the first angle, the plane conductor arranged almost on a same plane as the ground plane, the plane conductor having a feed portion around the first angle, the first side facing a side of the ground plane, the second side arranged almost perpendicular to the side of the ground plane, a distance between the feed portion and the second angle including the first side being nearly 0.3 times as long as a wavelength of the first resonant frequency;
- and
- a line conductor arranged almost on the same plane as the ground plane, the line conductor having a first end connected to around an end of the second side being opposite the feed portion and a second end being open, a distance between the feed portion and the second end including lengths of the line conductor and the second side of the plane conductor being nearly a quarter times as long as a wavelength of the second resonant frequency.
A radio apparatus, comprising:
- a printed board including a ground plane;
- a first antenna element configured by a plane conductor shaped like a polygon having a first side, a second side and an angle between the first side and the second side, the plane conductor arranged almost on a same plane as the ground plane, the plane conductor having a feed portion around the angle, the first side facing a side of the ground plane, the second side arranged almost perpendicular to the side of the ground plane;
- and
- a second antenna element configured by a line conductor arranged almost on the same plane as the ground plane, the line conductor having a first end and a second end, the first end connected to around an end of the second side being opposite the feed portion.
Dependencies are inferred from the claim text.