A packaging structure, where the packaging structure includes: a first radiation plate, a second radiation plate, and a feeding part, where the second radiation plate is disposed below the first radiation plate, where a slot is disposed on the second radiation plate, where the slot is in a ring shape, where the feeding part is disposed below the second radiation plate, and where the feeding part includes a first feeding stub and a second feeding stub that are disposed independently of each other. Additionally, the first feeding stub and the second feeding stub are perpendicular to each other and disposed on a substrate below the slot, and the first feeding stub and the second feeding stub feed the first radiation plate using the slot.