Patent ID: 11924705
Assignee: PSJ INTERNATIONAL LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An antenna device, comprising:
a common ground metal layer having a first side and a second side;
a first dielectric layer disposed on the first side of the common ground metal layer;
a first antenna disposed on one side of the first dielectric layer opposite to the common ground metal layer, wherein the first antenna has a first metal patch and a first microstrip line connected to each other, and the first microstrip line has a first feeding point;
a second antenna disposed on the side of the first dielectric layer opposite to the common ground metal layer and being spaced apart from the first antenna by a predetermined distance, wherein the second antenna has a second metal patch and a second microstrip line connected to each other, and the second microstrip line has a second feeding point;
a second dielectric layer disposed on the second side of the common ground metal layer; and
a coupler disposed on one side of the second dielectric layer opposite to the common ground metal layer, and having a first input terminal, a second input terminal, a difference output terminal and a sum output terminal, wherein the first input terminal is connected to the first antenna through the first feeding point, and the second input terminal is connected to the second antenna through the second feeding point,
wherein the first antenna and the second antenna commonly operate in a predetermined frequency band, and the predetermined distance is associated with a predetermined wavelength corresponding to the predetermined frequency band.