Patent ID: 9685697
Date: 2017-06-20
CPC Classifications: H01F,H01Q,H03H

Claim:
1. A tunable antenna structure comprising: an antenna component comprising a feeding point configured to feed current signal and a grounding point configured to be grounded; a first switch circuit comprising a first plurality of loads and a first switch electronically coupled to the feeding point and the first plurality of loads; the first switch configured to selectively couple one of the first plurality of loads to the feeding point; a second switch circuit comprising a second plurality of loads and a second switch electronically coupled to the grounding point and the second plurality of loads; the second switch configured to selectively couple one of the second plurality of loads to the grounding point; wherein one terminal of each of the first groups of loads is grounded, another terminal of each of the first plurality of loads is electronically coupled to the first switch; wherein one terminal of each of the second groups of loads is grounded, another terminal of each of the second plurality of loads is electronically coupled to the second switch; wherein the first plurality of loads comprises a first inductor, a second inductor, a third inductor, and a fourth inductor; the second plurality of loads comprises a fifth inductor and a zero ohm resistor; when the first switch couples the first inductor with the feeding point and the second switch couples the fifth inductor with the grounding point, the tunable antenna structure is configured to receive/send wireless signals at a first frequency band; wherein when the first switch couples the second inductor with the feeding point and the second switch couples the fifth inductor with the grounding point, the tunable antenna structure is configured to receive/send wireless signals at a second frequency band; wherein when the first switch couples the third inductor with the feeding point and the second switch couples the fifth inductor with the grounding point, the tunable antenna structure is configured to receive/send wireless signals at a third frequency band; and wherein when the first switch couples the fourth inductor with the feeding point and the second switch couples the zero ohm resistor with the grounding point, the tunable antenna structure is configured to receive/send wireless signals at a fourth frequency band.