Antenna apparatus and communication device

A communication device, comprising a radio frequency circuit and an antenna apparatus, wherein the antenna apparatus comprises a reflection plate, a radiating element, and a feeding network,

• the radiating element is disposed on the reflection plate and comprises a balun and at least two radiation arms located at one end of the balun, wherein the balun comprises a first feeding layer, a common ground layer, and a second feeding layer that are disposed in that sequence, the feeding network comprises a phase shifter, and the phase shifter comprises a feeding member;
• one end of the common ground layer is electrically connected to one of the radiation arms, and an opposite end of the common ground layer is electrically connected to the reflection plate, or the opposite end of the common ground layer is disposed above the reflection plate in a suspended manner;
• and one end of the first feeding layer and one end of the second feeding layer are electrically connected to another one of the radiation arms, the opposite end of the first feeding layer is electrically connected to the feeding member, and the feeding member and the first feeding layer are an integrated member.