Rf tag antenna and method for manufacturing same, and rf tag

Abstract

[Problem to be Solved] To provide an RF tag antenna capable of improving readability and a method of manufacturing the same, and an RF tag. [Solution] An RF tag antennaaccording to an embodiment includes a first insulating substratehaving a first principal surface and a second principal surface, a first waveguide deviceprovided on the first principal surface, a second waveguide deviceprovided on the second principal surface, a power feeding partelectrically connected to the second waveguide deviceat one end thereof, and a short-circuit partelectrically connected to the first waveguide deviceat one end thereof and to the second waveguide deviceat another end thereof, the first insulating substrate, the first waveguide device, the second waveguide device, the power feeding partand the short-circuit partform a plate-shaped inverted-F antenna that receives a radio wave transmitted from a reader, and an inductor pattern L formed by the first waveguide device, the short-circuit part, the second waveguide deviceand the power feeding partand a capacitorformed by the first waveguide device, the second waveguide deviceand the first insulating substrateform a resonant circuit that resonates in a frequency band of the radio wave.