Abstract: Disclosed is a smart contact lens including a visible area, an outer ring area, a signal source, an antenna assembly, an induction coil, a high pass filter, an induction module, and a low pass filter. The outer ring area encircles the visible area. The signal source is disposed in the outer ring area. The antenna assembly is disposed in the outer ring area and connected to the signal source. The induction coil is disposed in the outer ring area and encircles the antenna assembly. The high pass filter is connected to the signal source and the induction coil. The induction module is disposed in the outer ring area. The low pass filter is connected to the induction coil and the induction module. The induction coil and the antenna assembly jointly resonate at an ultra-high frequency band, and the ultra-high frequency band is between 902 MHz and 928 MHz.

Abstract: An antenna for an electronic device includes a grounding sheet for providing grounding, a metal sheet having a shape substantially corresponding to a rectangular with a first section at a first corner, a feed-in unit electrically connected to the metal sheet corresponding to a second corner adjacent to the first corner of the rectangular, for transmitting electromagnetic energy, and a shorting wall electrically connected to the grounding sheet and a first side of the metal sheet, for forming a resonating cavity, wherein the first side is opposite to a second side of the metal sheet, and the second side is adjacent to the first and second corners, wherein a length and a width of the rectangular are respectively related to frequency ranges of at least one operating frequency band, and the first section increases a frequency range of a first frequency band of the operating frequency bands.