A printed antenna on a substrate for radiating and capturing radio frequency signals includes a ground portion, a feeding element and a radiating portion. The radiating portion is a main body of the printed antenna, and includes a connecting patch and a radiating patch. One end of the connecting patch is electronically connected to the feeding element. The connecting patch is tapered, with a width thereof gradually decreasing in a direction toward the feeding element. The radiating patch is electronically connected to the connecting patch, and has an inverted V-shape.