To easily and inexpensively produce a micro-strip antenna and also to improve a transmission/reception characteristic.
The micro-strip antenna 10 is provided with a dielectric substrate 12, a press-molded radiation electrode board 1 which is arranged on the front face of the dielectric substrate 12 and a press-molded grounding electrode board 16 which is arranged on the rear face of the dielectric substrate 12 and is larger than the rear face in area. The grounding electrode board 16 is provided with a tubular conductive sleeve 22 which encloses, in an insulating state, a power feeding wire 18a which penetrates the dielectric substrate 12 from a rear face side to a front face side. The length of an independent exposure part in the power feeling wire 18a is shortened by the conductive sleeve 22 to that adverse influence due to the transmission/reception of radio wave is reduced in the exposure part.
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KOBAYASHI YASUTAKA
MARUTA KIMIO
TAKAHASHI HIRONOBU
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