| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device capable of improving metal proximity resistance and a design method of the antenna device, in order to prevent a state in which when a radio communication system is constructed in a quasi-closed space surrounded by metal in an automobile, a room, or the like, if an antenna gets close to a wall surface (metal), an antenna characteristic is changed, and an antenna device cannot exercise desired performance.SOLUTION: An antenna device in an embodiment sets an input impedance value in a free space higher than an input impedance matching value within a range where a preset reflection characteristic or voltage standing-wave ratio is satisfied.SELECTED DRAWING: Figure 1 |
