Patent ID: 9537203
Date: 2017-01-03
CPC Classifications: H01Q

Claim:
1. An antenna device comprising: a grounding conductor on which a hole is formed; a conductive hollow tube which is brought into tight contact with a surface of the grounding conductor at a position where a first end of the conductive hollow tube having an opening plane whose inner diameter matches a diameter of the hole formed on the grounding conductor overlaps with the hole, and which is bent so that an opening plane of a second end of the conductive hollow tube on an opposite side to the first end faces an opposite direction to the surface of the grounding conductor, and that an intermediate portion between the first end and the second end is arranged parallel to the grounding conductor; and a power feeder line conductor with one end connected to a high-frequency power supply and another end connected to a side surface of the intermediate portion at a position at a distance of ¼ wavelength in an operating frequency from the first end, wherein a conductive liquid supplied from the opening plane of the first end is passed through the conductive hollow tube and discharged to an outside from the opening plane of the second end.