阅读说明：本技术 一种多频天线及移动终端 (multi-frequency antenna and mobile terminal ) 是由 薛亮 余冬 应李俊 侯猛 尤佳庆 于 2018-12-26 设计创作，主要内容包括：本申请提供了一种多频天线及移动终端,该天线包括：馈电线与所述馈电线连接的辐射单元,还包括,第一陷波结构,位于所述辐射单元一侧且与所述辐射单元耦合连接；第二陷波结构,位于所述第一陷波结构远离所述辐射单元一侧,且所述第二陷波结构远离所述辐射单元的一端接地；所述第一陷波结构可选择的与地或所述第二陷波结构连接,且在所述第一陷波结构与所述第二陷波结构连接时,所述第一陷波结构通过第一调谐器件与所述第二陷波结构连接。在上述技术方案中,通过设置的第一陷波结构与第二陷波结构与地之间可选择的连接,从而可以改善陷波结构自身的谐振,进而可以改善天线不同频段的通信效果,提高了天线的通信效果。(The application provides a multi-frequency antenna and a mobile terminal, the antenna includes a feeding line, a radiation unit connected with the feeding line, an notch structure located at the side of the radiation unit and coupled with the radiation unit, a second notch structure located at the side of the notch structure far away from the radiation unit , and the end of the second notch structure far away from the radiation unit is grounded, the notch structure is selectively connected with ground or the second notch structure, and when the notch structure is connected with the second notch structure, the notch structure is connected with the second notch structure through a tuning device.)

A multi-frequency antenna comprises a power supply line, a radiation unit connected with the power supply line, and a power supply unit,

an notch structure located at the side of the radiating element and coupled with the radiating element;

a second notch structure located at the side of the notch structure far from the radiating element , and the end of the second notch structure far from the radiating element is grounded;

the notch structure is selectively coupled to ground or the second notch structure, and the notch structure is coupled to the second notch structure through a tuning device when the notch structure is coupled to the second notch structure.

The multi-frequency antenna of claim 1, wherein the antenna has a plurality of set frequencies, wherein a highest set frequency is a th set frequency, a lowest set frequency is a second set frequency, and the second notch structure has a frequency higher than the th set frequency by a th threshold, and the th notch structure has a frequency lower than the second set frequency by a second threshold.

The multi-band antenna of claim 2, wherein the th predetermined frequency is a frequency corresponding to the B8 band, and the second predetermined frequency is a frequency corresponding to the B28 band.

The multi-frequency antenna of claim 2, wherein the th threshold has a frequency of 0-300MHZ, and the second threshold has a frequency of 0-300 MHZ.

The multi-frequency antenna of claim 1, further comprising a second tuning device, said second tuning device comprising a plurality of th branches in parallel, and a plurality of th branches in parallel can be the same or different branches;

the notch structure selects th branch of the plurality of parallel th branches to ground through the th selector switch.

The multi-frequency antenna of claim 5, wherein the antenna has a plurality of set frequencies, wherein the notch structure, when connected to the second tuning device, forms a component having a resonant frequency that is lower than the set frequency at which the antenna is at a threshold when the antenna is at any set frequencies of the plurality of set frequencies.

The multi-frequency antenna of claim 1, wherein said tuning element comprises a plurality of parallel second branches, and the plurality of parallel second branches may be the same or different branches;

the second trap structure selects of the plurality of parallel second branches to connect with the second trap structure through the second selection switch.

The multi-frequency antenna of claim 7, wherein the antenna has a plurality of set frequencies, wherein the notch structure forms a component when connected to the second notch structure through the th tuning device at a resonant frequency that is lower than the th threshold frequency of the set frequency at which the antenna is located when the antenna is at any set frequencies of the plurality of set frequencies.

The multi-frequency antenna of claim 7, wherein said tuning element further comprises a plurality of parallel third branches connected to ground, wherein the plurality of parallel third branches may be the same or different branches;

the notch structure selects of the third branch connections through the second selection switch.

The multi-frequency antenna of claim 9, wherein the antenna has a plurality of set frequencies, wherein the resonance frequency of the component formed when the notch structure is connected to the third branch is lower than the set frequency of the antenna by a threshold when the antenna is at any set frequencies of the plurality of set frequencies.

The multi-frequency antenna of claim 1, further comprising a third notch structure located at the end of the radiating element distal from the notch structure , and the end of the third notch structure distal from the end of the radiating element is grounded.

The multi-frequency antenna of claim 11, further comprising a third tuning device, wherein the third tuning device comprises a plurality of parallel-connected fourth branches, and the plurality of parallel-connected fourth branches may be the same or different branches; and a third selection switch;

the third notch structure selects of the plurality of parallel fourth branches to ground through the third selection switch.

The multi-frequency antenna of claim 12, wherein the antenna has a plurality of set frequencies, wherein the resonance frequency of the component formed when the notch structure is connected to the third tuning device is lower than the set frequency at which the antenna is at a threshold when the antenna is at any set frequencies of the plurality of set frequencies.

The multi-frequency antenna of claim 1, wherein said notch structure and said radiating element are body structures;

the difference between L1 and L2 is between the third set threshold; wherein the content of the first and second substances,

l1 is the current path length of the second notch structure;

l2 is the length of the current path from the connection point of the feed line and the radiating element to the th end of the notch structure, and the th end of the notch structure is the end of the notch structure near the second notch structure.

The multi-frequency antenna of claim 14, wherein said second notch structure has a th switch disposed thereon, said radiating element has a second switch disposed thereon;

the second notch structure and the radiating unit further satisfy: the difference between L3 and L4 is between the fourth set threshold; wherein the content of the first and second substances,

l3 is the current path length from the connection point of the switch and the second notch structure to the end of the second notch structure away from the radiating element;

l4 is the current path length of the second switch to the th end of the notch structure.

The multi-frequency antenna of claim 14 or 15, further comprising

A third notch structure located at end of the radiating element far away from the second notch structure and coupled with the radiating element, and the end of the third notch structure far away from the radiating element is grounded, wherein,

the difference between L5 and L6 is between the third set threshold; wherein the content of the first and second substances,

l5 is the current path length of the third notch structure;

l6 is the current path length from the connection point of the feed line and the radiating element to the second end of the radiating element, and the second end of the radiating element is the end of the radiating element near the third notch structure.

The multi-frequency antenna of claim 16, wherein a third switch is disposed on said third notch structure; a fourth change-over switch is arranged on the radiation unit;

the third notch structure and the radiating unit further satisfy: the difference between L7 and L8 is between the fourth set threshold; wherein the content of the first and second substances,

l7 is the current path length from the connection point of the third switch and the third notch structure to the end of the third notch structure away from the radiating element;

l8 is the current path length of the fourth switch to the second end of the radiating element.

mobile terminal, comprising the multi-frequency antenna of any of claims 1-17 and .