| 主权项 |
1. A tunable long term evolution antenna, comprising:
a feeding portion, coupled to a radio frequency circuit, the feeding portion having at least one bending; a grounding portion, coupled to a ground; a first radiation portion, the shape of the first radiation portion is a strip, two terminals of the strip respectively are a first terminal and a second terminal, the first terminal is connected to the feeding portion and the grounding portion; a second radiation portion, connected to the grounding portion and the first terminal of the first radiation portion; and a coupling radiation portion, having a switching terminal, a low frequency coupling portion and a high frequency coupling portion, the switching terminal connected between the low frequency coupling portion and the high frequency coupling portion, the switch terminal coupled to a switch, the switch connected to the ground, the switch being for determining whether the switching terminal is coupled to the ground or floating, the low frequency coupling portion and the first radiation portion disposed in parallel, the lower frequency coupling portion being near to the second terminal of the first radiation portion by a first spacing, the high frequency coupling portion having at least a branch, the branch being near to the second terminal of the first radiation portion by a second spacing; wherein the feeding portion, the grounding portion, the first radiation portion, the second radiation portion, and the coupling radiation portion are disposed on a nonconductive substrate, the tunable long term evolution antenna operates in a long term evolution (LTE) technology mode when the switching terminal of the coupling radiation portion is coupled to the ground through the switch, the tunable long term evolution antenna operates in a third-generation (3G) mode when the switching terminal of the coupling radiation portion is floating. |
