Self-decoupling wideband antenna system and terminal device

An antenna system, comprising:

• a first feed point;
• a first radiation stub having a first end that is connected to a first ground point, wherein the first radiation stub is further connected to the first feed point;
• a second feed point;
• a second radiation stub having a first end that is connected to a second ground point, wherein a slot is provided between a second end of the second radiation stub and a second end of the first radiation stub, wherein a distance between the second end of the second radiation stub and the second end of the first radiation stub is less than a distance between the first end of the second radiation stub and the second end of the first radiation stub, wherein the second radiation stub is further connected to the second feed point, wherein the first radiation stub and the second radiation stub are configured to excite a first resonant mode under an action of a first frequency band signal fed at the first feed point, and the first resonant mode is a resonant mode corresponding to a slot common mode current, wherein the first radiation stub and the second radiation stub are further configured to excite a second resonant mode under an action of a second frequency band signal fed at the first feed point, and the second resonant mode is a resonant mode corresponding to a slot differential mode current, and wherein the second radiation stub is configured to excite a third resonant mode under an action of a third frequency band signal fed at the second feed point;
• a third feed point;
• and
• a third radiation stub having a first end that is connected to the second ground point, and a second end away from the second ground point that is connected to the third feed point, wherein the second radiation stub and the third radiation stub are configured to excite a fourth resonant mode under an action of the first frequency band signal fed at the third feed point, and the fourth resonant mode is a resonant mode corresponding to a line common mode current, and wherein the second radiation stub and the third radiation stub are further configured to excite a fifth resonant mode under an action of the second frequency band signal fed at the third feed point, and the fifth resonant mode is a resonant mode corresponding to a line differential mode current.

A terminal device, comprising:

• a housing;
• and
• an antenna system arranged within the housing, wherein the antenna system comprises:
• a first feed point;
• a first radiation stub having a first end that is connected to a first ground point, wherein the first radiation stub is further connected to the first feed point;
• a second feed point;
• a second radiation stub having a first end that is connected to a second ground point, wherein a slot is provided between a second end of the second radiation stub and a second end of the first radiation stub, wherein a distance between the second end of the second radiation stub and the second end of the first radiation stub is less than a distance between the first end of the second radiation stub and the second end of the first radiation stub, wherein the second radiation stub is further connected to the second feed point, wherein the first radiation stub and the second radiation stub are configured to excite a first resonant mode under an action of a first frequency band signal fed at the first feed point, and the first resonant mode is a resonant mode corresponding to a slot common mode current, wherein the first radiation stub and the second radiation stub are further configured to excite a second resonant mode under an action of a second frequency band signal fed at the first feed point, and the second resonant mode is a resonant mode corresponding to a slot differential mode current, and wherein the second radiation stub is configured to excite a third resonant mode under an action of a third frequency band signal fed at the second feed point;
• a third feed point;
• and
• a third radiation stub having a first end that is connected to the second ground point, and a second end away from the second ground point that is connected to the third feed point, wherein the second radiation stub and the third radiation stub are configured to excite a fourth resonant mode under an action of the first frequency band signal fed at the third feed point, and the fourth resonant mode is a resonant mode corresponding to a line common mode current, and wherein the second radiation stub and the third radiation stub are further configured to excite a fifth resonant mode under an action of the second frequency band signal fed at the third feed point, and the fifth resonant mode is a resonant mode corresponding to a line differential mode current.