Antenna circuit and mobile terminal

An antenna circuit, comprising:

• an antenna unit,
• a switching circuit connection point and a feed point being arranged on the antenna unit,
• an antenna feed connected with the feed point,
• a first tuning circuit connected with the switching circuit connection point, the first tuning circuit is configured to increase a bandwidth of a single resonant mode in an intermediate-high frequency and/or tune a resonant frequency in the intermediate-high frequency;
• wherein a distance from the feed point to the end of the antenna unit is larger than a distance from the switching circuit connection point to the end of the antenna unit;
• wherein the first tuning circuit comprises:
• a first switch, a first inductor, a second inductor, a first capacitor and a first through line;
• wherein a first terminal of the first inductor, a first terminal of the second inductor, a first terminal of the first capacitor and a first end of the first through line are connected at a first connection point, and the first connection point is grounded;
• a first terminal of the first switch is connected with the switching circuit connection point, a second terminal of the first switch is connected with at least one of a second terminal of the first inductor, a second terminal of the second inductor, a second terminal of the first capacitor and a second end of the first through line or the second terminal of the first switch is not connected with any of the second terminal of the first inductor, the second terminal of the second inductor, the second terminal of the first capacitor and the second end of the first through line;
• when the second terminal of the first switch is connected with at least one of the second terminal of the first inductor, the second terminal of the second inductor, the e terminal of the first capacitor and the second end of the first through line, the bandwidth of the single resonant mode in the intermediate-high frequency is increased;
• when the second terminal of the first switch is connected with another one or more of the second terminal of the first inductor, the second terminal of the second inductor, the second terminal of the first capacitor and the second end of the first through line, the resonant frequency in the intermediate-high frequency is tuned.