| 摘要 |
PURPOSE: A multiband antenna array is provided to obtain an optimized radiation pattern in a first and a second frequency by controlling an interval between a first antenna element and a second antenna element. CONSTITUTION: A plurality of antenna devices are arranged with a first interval. The first interval is half the wavelength of a first frequency. A plurality of second antenna elements are arranged with a second interval. The second interval is half the wave length of a second frequency which is higher than the first frequency. A switch is arranged in a first antenna element in order to control the length of the first antenna element. When an operation frequency is set to as the first frequency, a controller(130) outputs a first control signal for activating the first antenna element.
|
