Patent ID: 11967780
Assignee: VIVO MOBILE COMMUNICATION CO., LTD.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An antenna structure for a communications terminal, wherein the antenna structure comprises: an antenna radiator, a signal source, a first capacitor, and a first tuning circuit;
a first terminal of the antenna radiator is grounded;
a first terminal of the first capacitor and a first terminal of the first tuning circuit are electrically connected to a connection point of the antenna radiator, a second terminal of the first capacitor is electrically connected to the signal source, and a second terminal of the first tuning circuit is grounded, wherein
a total length of the antenna radiator and a first length between a second terminal of the antenna radiator and a connection point electrically connected to the first tuning circuit are designed in order for an antenna impedance of the first terminal of the first capacitor at target frequencies to be in the first quadrant of a Smith chart, wherein the target frequencies are at least some frequencies in frequency bands covered by the antenna radiator.