| 摘要 |
PURPOSE:To obtain the antenna which is able to use a radio wave of plural frequency bands while being mounted in a space of a very small volume of an aircraft or a flying body. CONSTITUTION:A dielectric board 4 is fitted to a ground conductor 3 and a patch antenna 5 is adhered to the dielectric base 4. A feeder 6 penetrating the ground conductor 3 and the dielectric board 4 is connected to a feeding point 7 provided on a reflecting plane of the patch antenna 5. One end face of a dielectric support 10 is fitted to a surface of the patch antenna 5. A spiral helical antenna 11 with a predetermined pitch and diameter is inserted externally to a side face of the dielectric support 10 in the lengthwise direction and fixed by a non-metal support 12. A coaxial feeder 13 whose surface coating connects to the patch antenna 5 as earthing is connected to the helical antenna 11. |
