| 摘要 |
PURPOSE:To miniaturize an antenna, to make it light weight, and to enable the signals of two frequencies to be received by providing a ground conductor plate between two microstrip conductors, and providing a slot extending in a specific direction on the ground conductor plate. CONSTITUTION:The ground conductor plate 3 is provided between a microstrip batch conductor 5 and the microstrip conductor 7 connected to the conductor 5, and the microstrip conductor 2 provided on a position confronting with the conductor 5 via dielectric substrates 4 and 1. On the conductor 3, the slot 6 extending in a direction opposite to the conductor 5 and to cross with the conductor 2 is formed. By constituting a device in such a way, a first linearly polarized microstrip antenna can be constituted of the conductor 5 and the conductor plate 3, and a second linearly polarized microstrip antenna can be constituted of the conductor 5 and the slot 6. And by setting the resonance frequencies of the first and second linearly polarized microstrip antennas differently from each other, different transmission/reception frequencies of those two antennas can be set. |
