Experimental studies on coupling characteristics of rectangular slot

This paper experimentally studies the coupling coefficient of microwaves into rectangular slots. The frequency range is from 2 to 18GHz. The experimental method is presented, and the experimental setup is established. The experimental results show that the resonant effect will take place if the microwave wavelength is twice about the side length of the rectangular slot, and if the direction of the incident electric field is perpendicular to the long side of the slot. There is a strong coupling band near the resonant frequency, around which the enhancement effect can take place.