Patent Application
20200044331
The present disclosure relates to the field of wireless communication technologies, and in particular, to a multi-antenna system for a mobile terminal.
With the vigorous development of 5G communication technology, more and more attention has been paid to researches thereon. Multiple Input Multiple Output (MIMO) technology is a core technology for 50 antennas, and the implementation of multi-antennas is the basis of MIMO technology.
As the design for mobile terminals becomes more and more thin, the arrangement of the antennas is inevitably tight due to limitation on size of mobile terminals, thus causing a problem that the mutual coupling interference of adjacent antennas at same frequency bands are strong.
In the prior art, the main solution for mutual coupling interference between multi-antennas is widening the spacing between the antennas, but the widened spacing is limited by the size of devices. Additionally, the problem could also be solved by introducing a neutralization line between the antennas, but the neutralization line technology has a strict requirement on antennas, and neutralization line needs to reach a certain length to have an effect.
Therefore, it is necessary to provide a new multi-antenna system to solve the above problems.
The present disclosure will now be further described with reference to the drawings and embodiments.
As shown in
Specifically, the multi-antenna system comprises a PCB board 1, a plurality of antenna units 2 connected to a ground line of the PCB board 1, a neutralization line 3 connecting two adjacent antenna units 2, and an inductor element 4 disposed on the neutralization line 3, where, the PCB board 1 is the main board of the mobile terminal. In this embodiment, the number of the antenna units 2 is four, and the neutralization line 3 is connected between each two of the adjacent antenna units 2, and the two adjacent antenna units 2 are connected together through the neutralization line 3. The neutralization line 3 generates resonance at an operating frequency band of the antenna so as to form a high-resistance structure, which may change the conduction of current between the two adjacent antenna units and may reduce the coupling interference therebetween. Since the neutralization line 3 has to be a certain length for reducing the coupling interference, and the length of the neutralization line 3 is limited by the size of device, the present disclosure increases the internal resistance of the neutralization line 3 by providing an inductor element on the neutralization line 3, thereby increasing the isolation degree between the antenna units and reducing the coupling interference. The inductor element 4 may be any one of an inductor, a coil and a microstrip line, and the inductance value thereof is controlled to be 10 nH to 50 nH.
In the present embodiment, in order to better explain the idea of the present disclosure, the principle of the present disclosure will be described below with reference to
Thus, although the two adjacent antenna units 2 share a common grounding line, the mutual interference therebetween is greatly reduced as the two antenna units are isolated by using the neutralization line 3 with the inductor element 4.
In the present embodiment, the antenna unit 2 is an FPC antenna, for example. Of course, other antenna forms may also be adopted, and the present disclosure is not limited thereto.
Further, the inductor element 4 is generally disposed at a midpoint of the neutralization line 3, which may be directly disposed on the PCB board, without influencing the layout of other electronic elements of the mobile terminal.
Further, the multi-antenna system comprises 8 antenna units, the multi-antenna system is a MIMO multi-antenna array of 8*8, and operating frequency bands thereof are 3.4-3.6 GHz and/or 4.8-5.0 GHz.
Compared with the prior art, the multi-antenna system and the mobile terminal provided by the present disclosure have the following beneficial effects:
The above only illustrates the embodiments of the present disclosure but is not intended to limit the scope of the disclosure, and equivalent structures or equivalent process transformations made by using the contents of the present disclosure and the drawings, or direct or indirect applications to other related technology fields are all included in the scope of patent protection of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201810879378.1 | Aug 2018 | CN | national |
