| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna device having a minimal transmission loss at signal transmission/reception.SOLUTION: An antenna device 100 includes: a radiation metal 110; a ground GND coupled with the radiation metal; a first impedance part 120 coupled between the radiation metal and the ground to form a first path, and with an impedance value varied with a frequency, forming the first path to be open according to a predetermined frequency; and a second impedance part 130 coupled between the radiation metal and the ground to form a second path in parallel with the first path, and with an impedance value varied with a frequency, forming the second path to have a short circuit according to a predetermined frequency. |
