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Antenna structure and communication terminal

An antenna structure and communication terminal technology, applied in the field of communication, can solve the problems of large antenna impedance mismatch loss, poor antenna transmission efficiency, etc.

Active Publication Date: 2019-04-16
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] An embodiment of the present invention provides an antenna structure and a communication terminal to solve the problem that the existing antenna has a large impedance mismatch loss, resulting in poor transmission efficiency of the antenna

Method used

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  • Antenna structure and communication terminal
  • Antenna structure and communication terminal
  • Antenna structure and communication terminal

Examples

Experimental program
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Embodiment 1

[0150] The antenna structure of the first embodiment can refer to Figure 6 shown. It should be noted that, in this embodiment, an example in which the antenna radiator is a medium-high frequency antenna radiator is used for illustration.

[0151] exist Figure 6 In the antenna radiator, a series of small capacitors C1 at the feed point C of the antenna radiator can realize the coverage of the antenna bandwidth. Wherein, the value range of C1 may be 0.5-2.7 pf, preferably, the value range of C1 may be 0.8-1.5 pf. It should be understood that C1 is equivalent to the aforementioned first capacitor.

[0152] The first tuning circuit includes K1, K2, L1 and L2. It should be understood that K1 is equivalent to the aforementioned second switch, K2 is equivalent to the aforementioned third switch, L1 is equivalent to the aforementioned second inductor, and L2 is equivalent to the aforementioned third inductor.

[0153] In the specific implementation, K1 and K2 are all off (that ...

Embodiment 2

[0175] The main difference between this embodiment and Embodiment 1 is that a second tuning circuit is newly added, and the second tuning circuit in this embodiment is mainly used to implement dual-resonance carrier aggregation (Carrier Aggregation, CA).

[0176] Such as Figure 10 As shown, the second tuning circuit in this embodiment includes K3, L3 and C2. Wherein, K3 is equivalent to the aforementioned first switch, L3 is equivalent to the aforementioned first inductor, and C2 is equivalent to the aforementioned second capacitor.

[0177] In specific implementation, when K1 is turned on, K2 is not turned on (that is, in the state of H1 or H2), and when K3 is turned on, the antenna radiator can generate two new resonant modes H5 and H6, which exist at the same time and can be used for Cover the CA requirements of B39+B41.

[0178] When both K1 and K2 are off and only K3 is on, the antenna radiator can be used to cover the CA requirements of B3+B40.

[0179] Among them, t...

Embodiment 3

[0185] The main difference between this embodiment and Embodiment 1 is that a second tuning circuit is newly added, and the second tuning circuit in this embodiment is mainly used to adjust the resonance frequency of the target resonance mode of the antenna structure and improve the performance of the target resonance mode. The antenna standing wave ratio of the target frequency band reduces mismatch loss.

[0186] Such as Figure 13 As shown, the second tuning circuit in this embodiment includes K3 and C2 connected in series. Wherein, K3 is equivalent to the aforementioned first switch, and C2 is equivalent to the aforementioned second capacitor. The second tuning circuit of this embodiment can be used to adjust the resonant frequency of H2 and H3, so as to better improve the antenna standing wave ratio of B39 and B40 and reduce the mismatch loss. If C2 is turned on, the resonant frequency of H2 and H3 will decrease.

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Abstract

The invention provides an antenna structure and a communication terminal. The antenna structure comprises an antenna radiator, a signal source, a first capacitor and a first tuning circuit; the firstend of the antenna radiator is grounded; the first end of the first capacitor and the first end of the first tuning circuit are both electrically connected with the connection point of the antenna radiator, the second end of the first capacitor is electrically connected with the signal source, and the second end of the first tuning circuit is grounded, wherein the antenna impedance of the first end of the first capacitor at a target frequency point is located in the first quadrant of the Smith chart, and the target frequency point is at least part of the frequency points in a frequency band covered by the antenna radiator. According to the scheme of the invention, on the one hand, the antenna structure can generate a new resonance mode, and the resonance mode excited by the antenna structure can be optimized; and on the other hand, the problem of impedance mismatch loss of the antenna can be improved, the impedance mismatch loss can be reduced, and the transmission efficiency of the antenna can be further improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to an antenna structure and a communication terminal. Background technique [0002] At present, high and low frequency split antennas are usually used in communication terminals. By distributing antennas covering different frequency bands in different areas of the communication terminal, the space of the whole machine can be better utilized. For example, two independent antennas can be installed in the communication terminal, one is a low-frequency antenna covering a frequency range of 0.7-0.96 GHz (gigahertz); the other is a medium-high frequency antenna covering a frequency range of 1.71-2.69 GHz. [0003] However, with the popularization of "full screen" mobile terminals, the space of the antenna is greatly compressed, resulting in a large impedance mismatch loss of the antenna, resulting in poor transmission efficiency of the antenna. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/50H01Q5/10H01Q5/28H01Q5/335H01Q1/36
CPCH01Q1/36H01Q1/50H01Q5/10H01Q5/28H01Q5/335H01Q1/243H01Q9/42H01Q5/328H01Q9/0414H01Q9/0442
Inventor 李日辉蒋锐侯梓鹏
Owner VIVO MOBILE COMM CO LTD
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