connection interface device (200) includes a first conductor layer (210), a second conductor layer (270), a dielectric layer (260), the. The first conductive layer (210), together with a transmission line on both sides is in strip-shaped waveguide slot waveguide line (222) is provided, one end and the other end of the waveguide line (222) the provided second coupling line (232) of each of the antennas that are ring enclosed by the second coupling slot (231), the second conductor layer (270), a position facing the second coupling line (232) each third slot (271) is provided, when the surface conductive layer of the electromagnetic wave propagation sheet (100) (130), the interface device (200) is superimposed on the electromagnetic wave propagation sheet (100), third and to resonate coupling slot through (200) a second coupling line (232), the first coupling line of the arranged antenna in a first coupling slot (151) (152) is provided.
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