Antennas and Mobile Terminals

Abstract

The invention relates to the technical field of communication, and particularly relates to an antenna and a mobile terminal. The antenna comprises a system ground, a closed metal ring and a main board electrically connected with the system ground; the metal ring is electrically connected with the system ground; a radiation body is formed on the part, from a first position to a second position, on the metal ring; the main board is provided with a grounding circuit, a first tuning switch, a second tuning switch, a feeder circuit and an impedance matching circuit; the grounding circuit is electrically connected with a first grounding point, and electrically connected with the metal ring in the third position of the metal ring; the first tuning switch is electrically connected between the first grounding point and the grounding circuit; the second tuning switch is electrically connected between a second grounding point and the fourth position of the metal ring; the feeder circuit is electrically connected with a feeding point, and electrically connected with the metal ring in the fifth position of the metal ring; and the impedance matching circuit is electrically connected between the feeding point and the feeder circuit.

Description

technical field [0001] The present invention relates to the technical field of communications, in particular to an antenna and a mobile terminal. Background technique [0002] With the continuous development of communication technology, people's demands on mobile terminals are becoming more and more diversified. Therefore, the requirements on antenna design in mobile terminals are also getting higher and higher. Due to the stability and aesthetics of the metal shell structure, it is more and more widely used in mobile terminals, such as mobile phones. In the related art, the metal shell is usually a closed metal ring, a broken metal ring, and a metal back shell. However, the metal shell usually constitutes a part of the antenna, and the arrangement of the metal material will have a certain shielding or absorption effect on electromagnetic waves, so that the antenna cannot be tuned flexibly. Therefore, the arrangement of the metal shell increases the difficulty of designing...

AI Technical Summary

Problems solved by technology

However, the metal shell usually constitutes a part of the antenna, and the setting of the metal material will have a certain shielding or absorption effect on electromagnetic waves, resulting in the inability of the antenna to be tuned flexibly

Therefore, the setting of the metal shell increases the difficulty of antenna design

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