| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna that can easily be formed to have a low profile and a small size at a low cost. SOLUTION: The antenna is provided with a main body 40, a conductive layer 42 installed while being coated on an inner diametrical face of a through- hole of the main body 40, an insulator 43 that is fitted inside the conductive layer 42, and a feed pin that is placed in the center of the insulator 43. Patch antennas 52 are placed on a circumferential face of the main body 40 at a prescribed interval from an earth conductor layer 50 at one end of the main body 40. A spiral antenna 45 is connected to the other end of the main body. The signal from a mobile communication system and a positioning system received by the winding antenna 45 and the patch antenna 52 with the feeding pin and a conductor wire is delivered to the inside of a MODEM facility. Thus, the volume of the antenna can be reduced and the antenna with the low profile and small size can be formed at a low manufacture cost.
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