CN211980899U

CN211980899U - 5G mobile phone antenna system

Info

Publication number: CN211980899U
Application number: CN202020901732.9U
Authority: CN
Inventors: 俸德安; 潘秋波; 廖林飞
Original assignee: Huizhou Speed Wireless Technology Co Ltd
Current assignee: Huizhou Speed Wireless Technology Co Ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2020-11-20
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a 5G mobile phone antenna system, including mobile phone motherboard, first antenna tuning switch, second antenna tuning switch, first 5G antenna and second 5G antenna setting are at the relative both ends on the mobile phone motherboard to first 5G antenna and second 5G antenna can form the MIMO antenna, and first 5G antenna or second 5G antenna can regard as SISO antenna; the first antenna tuning switch is connected to the inner side ground foot position of the second 5G antenna, and the second antenna tuning switch is connected to the inner side ground foot position of the first 5G antenna. The utility model is used for can satisfy SISO antenna system and MIMO antenna system's mobile communication terminal simultaneously and use.

Description

5G mobile phone antenna system

Technical Field

The utility model relates to a mobile communication terminal antenna field, concretely relates to can compromise 5G cell-phone antenna system of MIMO antenna system and SISO antenna system simultaneously.

Background

The 5G has gradually entered into formal business, and the 5G era will also come up with the use experience of low time delay and high network speed, which is helpful for the application and development of key machines (such as 5G mobile phones and unmanned aerial vehicles) and large-scale internet of things devices. However, the design of the 5G antenna is more complex, which is a great challenge for the smart phone emphasizing thin and light weight nowadays, and not only the volume, but also the selection of the material of the body is required to avoid or improve the interference problem, and simultaneously, the 2G/3G/4G antenna performance is also required to be ensured. The main communication technologies of 5G include Massive MIMO, carrier aggregation, beamforming, etc., and a series of changes will occur to the terminal antenna in accordance with these technologies. For example, the use of MIMO technology will significantly increase the number of antennas, which is a technique that can be used to increase the bandwidth of a mobile device and increase data throughput by using multiple transmit and multiple receive antennas to simultaneously transmit and receive multiple data streams over a single wireless channel. The order of MIMO, which represents the number of independent information streams that can be transmitted or received, is directly equivalent to the number of antennas involved; the higher the order, the higher the data rate supported by the link, but the near field coupling of two or more antennas with the same frequency in the same system is very strong, which seriously interferes the work of respective transceiving electromagnetic waves, so the near field analysis of the antennas is also an important problem of electromagnetic compatibility, therefore, an isolation concept is introduced, the MIMO system and the isolation have a very contradictory relationship all the time, a higher and faster network speed can be obtained through the MIMO system, but for the SISO antenna system for communication, only one antenna is actually needed to meet the requirement, because the addition of the MIMO system causes the SISO antenna system to be affected by the isolation, thus the antenna performance which is poor originally is affected, and therefore, the requirement of the MIMO antenna and the communication quality of the SISO antenna system are difficult to be met simultaneously by the 5G antenna at present.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem to not enough in the background art, provide a 5G cell-phone antenna system that can solve.

In order to solve the technical problem, the technical scheme of the utility model is that: A5G mobile phone antenna system comprises a mobile phone mainboard, a first antenna tuning switch, a second antenna tuning switch, a first 5G antenna and a second 5G antenna, wherein the first 5G antenna and the second 5G antenna are arranged at two opposite ends of the mobile phone mainboard, the first 5G antenna and the second 5G antenna can form an MIMO antenna, and the first 5G antenna or the second 5G antenna can be used as a SISO antenna; the first antenna tuning switch is connected to the inner side ground foot position of the second 5G antenna, and the second antenna tuning switch is connected to the inner side ground foot position of the first 5G antenna.

Further, the first 5G antenna and the second 5G antenna are respectively arranged at the upper end and the lower end of the mobile phone mainboard.

Furthermore, a parasitic element is connected to the first 5G antenna and/or the second 5G antenna.

Further, the antenna switching device further comprises an antenna switching switch, and the antenna switching switch is connected to the feeding points of the first 5G antenna and the second 5G antenna.

Further, the antenna changeover switch is a DPDT switch.

The utility model discloses the beneficial effect who realizes mainly has following several: a second antenna tuning switch and a first antenna tuning switch are respectively connected to a first 5G antenna 5 and a second 5G antenna of the antenna system, and the working frequencies of the first 5G antenna 5 and the second 5G antenna can be tuned to a uniform frequency through the second antenna tuning switch and the first antenna tuning switch to form an MIMO antenna system which is used as a 5G antenna; or the first antenna tuning switch and the second antenna tuning switch can tune the operating frequencies of the second 5G antenna and the first 5G antenna 5 to different frequencies, and the antennas are used as SISO antennas of the G-communication network antenna, so that the isolation between the antennas is ensured. Therefore, the antenna system can be used by the mobile communication terminal simultaneously meeting the requirements of a SISO antenna system and a MIMO antenna system.

Drawings

Fig. 1 is a schematic perspective view of a 5G mobile phone antenna system according to an embodiment of the first embodiment;

fig. 2 is a return loss diagram of the antenna system of the 5G mobile phone in the first embodiment in two states;

FIG. 3 is a diagram illustrating a comparison between a 5G mobile phone antenna system and a prior art antenna system with improved isolation according to an embodiment;

fig. 4 is a comparison graph of darkroom testing efficiency after improving isolation of the 5G handset antenna system in the first embodiment.

The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted; the same or similar reference numerals correspond to the same or similar parts; the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent.

Detailed Description

To facilitate understanding for those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples.

Example one

Referring to fig. 1, a 5G mobile phone antenna system is used for a 5G mobile phone, and realizes that the 5G mobile phone simultaneously considers a MIMO (multiple input multiple output, multiple output antenna) system and a SISO (single input single output, single output antenna) system, thereby ensuring multiple transmitting and receiving antennas when the MIMO antenna system is used, simultaneously transmitting and receiving multiple data streams on a single wireless channel, improving the bandwidth of a mobile device, and increasing the data throughput; meanwhile, the antenna can be used as a single antenna of a SISO antenna system, and the influence of isolation on the SISO antenna system is improved.

Referring to fig. 1, the 5G mobile phone antenna system includes a mobile phone motherboard 1, a first antenna tuning switch 3, a second antenna tuning switch 4, a first 5G antenna 5 and a second 5G antenna 6, where the first 5G antenna 5 and the second 5G antenna 6 may be two antennas or two groups of antennas (each group of antennas includes multiple 5G antennas), and in this embodiment, the first 5G antenna 5 and the second 5G antenna 6 take two 5G antennas as an example for description. First 5G antenna 5 and second 5G antenna 6 set up opposite both ends on mobile phone motherboard 1, with first 5G antenna 5 and second 5G antenna 6 separately set up on mobile phone motherboard 1 different positions can, on the one hand can fully, rationally utilize the space on mobile phone motherboard 1, also avoid first 5G antenna 5 and second 5G antenna 6 to be too close mutual coupling simultaneously.

Referring to fig. 1, the first 5G antenna 5 and the second 5G antenna 6 may operate at a uniform frequency, thereby forming a MIMO antenna to be used as a 5G antenna; and the first 5G antenna 5 or the second 5G antenna 6 may be used alone as a SISO antenna as a 2G telephony network antenna. When the MIMO antenna function is used, the first antenna tuning switch 3 and the second antenna tuning switch 4 tune the working frequencies of the second 5G antenna 6 and the first 5G antenna 5 to a uniform frequency to form an MIMO antenna system; when using the SISO antenna function, the first antenna tuning switch 3 and the second antenna tuning switch 4 tune the second 5G antenna 6 and the first 5G antenna 5 operating frequency to different frequencies, thereby improving the isolation of the first 5G antenna 5 and the second 5G antenna 6, one of the first 5G antenna 5 and the second 5G antenna 6 acting as a 2G telephony network antenna.

Referring to fig. 1, the first 5G antenna 5 and the second 5G antenna 6 are disposed at two opposite ends of the mobile phone motherboard 1, which may be an upper end and a lower end of the mobile phone motherboard 1, or a left end and a right end of the mobile phone motherboard 1, as a further preferred scheme, in this embodiment, the first 5G antenna 5 and the second 5G antenna 6 are respectively disposed at the upper end and the lower end of the mobile phone motherboard 1, the mobile phone has a long strip structure, and the first 5G antenna 5 and the second 5G antenna 6 are disposed at the upper end and the lower end of the mobile phone motherboard 1, so that a distance between the first 5G antenna 5 and the second 5G antenna 6 can be increased, and a distance between the first 5G antenna 5 and the second 5G antenna 6 is increased to the maximum, thereby optimizing an isolation between the first 5G antenna 5 and the second 5G antenna 6.

Referring to fig. 1, as a further preferred scheme, a parasitic element is connected to the first 5G antenna 5 and/or the second 5G antenna 6, so that the radiation performance of the first 5G antenna 5 and the second 5G antenna 6 is improved by the parasitic element. The shape of the parasitic elements on the first 5G antenna 5 and the second 5G antenna 6 may be set as desired.

As a further preferred solution, referring to fig. 1, an antenna changeover switch 2 is further provided, said antenna changeover switch 2 being connected to a feed point 21 of the first 5G antenna 5 and a feed point 22 of the second 5G antenna 6. When the 5G mobile phone antenna system is used as a SISO antenna system of a 2G communication network antenna, the influence of hand holding and human head on the performance of the SISO antenna system can be effectively improved by using the antenna change-over switch 2. The lower end of the mobile phone can be held by a hand when the mobile phone is normally used for making a call, so that the performance of the second 5G antenna 6 positioned at the lower end of the mobile phone main board 1 is poor, the first 5G antenna 5 positioned at the upper end of the mobile phone main board 1 can be switched into the 2G communication network antenna through the switching of the antenna switch 2, the antenna performance is better because the upper end of the mobile phone is not held by the hand, and the influence of the hand holding and the human head on the performance of the SISO antenna system can be improved by using the antenna switch 2. The performance of the second 5G antenna 6 located at the lower end of the mobile phone motherboard 1 is better than that of the first 5G antenna 5 located at the upper end of the mobile phone motherboard 1 when no hand is held, so that when the lower end of the mobile phone is not held by a hand or the lower end of the mobile phone is held but the performance of the second 5G antenna 6 located at the lower end of the mobile phone motherboard 1 is not worse than that of the first 5G antenna 5 located at the upper end of the mobile phone motherboard 1, the second 5G antenna 6 located at the lower end of the mobile phone motherboard 1 can be switched by the antenna switch 2 to be used as a SISO antenna system of the 2G.

As a further preferable scheme, the antenna changeover switch 2 preferably adopts a DPDT switch (double-pole-throw) switch, so as to better control the second 5G antenna 6 located at the lower end of the mobile phone main board 1 and the first 5G antenna 5 located at the upper end of the mobile phone main board 1 to be switched as 2G communication network antennas.

Referring to fig. 2, the first antenna tuning switch 3 operates at RF1 to generate an antenna resonance as shown by return loss curve 001 in fig. 2; the antenna resonance produced when the first antenna tuning switch 3 is operated at RF2 is shown in return loss curve 002 of fig. 2; the first 5G antenna 5 is a common built-in 5G MIMO antenna while considering a 2G communication network antenna, and antenna resonance generated when the second antenna tuning switch 4 operates at RF1 path is shown as a return loss curve 003 in fig. 2.

Referring to fig. 3, curve 004 in fig. 3 is a graph of isolation of the first 5G antenna 5 and the second 5G antenna 6 when the first antenna tuning switch 3 and the second antenna tuning switch 4 are both operating at RF 1; curve 005 in fig. 3 is an isolation curve of the first 5G antenna 5 when the second antenna tuning switch 4 operates at RF1 and the second 5G antenna 6 when the first antenna tuning switch 3 operates at RF 2.

Referring to fig. 4, curve 007 is a darkroom test efficiency curve of the first 5G antenna 5 and the second 5G antenna 6 when the first antenna tuning switch 3 and the second antenna tuning switch 4 are both operated at RF 1; the curve 006 is the implied and test efficiency curve for the first 5G antenna 5 operating in the RF1 path at the second antenna tuning switch 4 and the second 5G antenna 6 operating in the RF2 path at the first antenna tuning switch 3.

Referring to fig. 2 to 4, the return loss curve generated by the first 5G antenna 5 is shown as a curve 003 in fig. 2, the return loss curve 001 generated by the second 5G antenna 6 in fig. 2 is changed into a curve 002 in fig. 2 after the return loss curve 001 generated by the second 5G antenna 6 is switched from the RF1 to the RF2 through the first antenna tuning switch 3, and it is only seen from the low frequency band 824MHZ to 960MHZ of the first 5G antenna 5 and the second 5G antenna 6 that the MIMO antenna needs to generate resonance at the same frequency band when operating; fig. 2 illustrates 880MHZ to 960MHZ bands, which can satisfy MIMO antenna requirements as shown in fig. 2. When the 2G call network works, the upper first 5G antenna 5 is required to work at 880 MHZ-960 MHZ, and the lower second 5G antenna 6 is influenced by the MIMO antenna and also works at 880 MHZ-960 MHZ frequency band, the isolation degree is shown as a curve 004 in figure 3, the low-frequency band isolation degree is about-20 DB, so that the low-frequency band efficiency tested by the first 5G antenna 5 is shown as a curve 007 in figure 4, and the peak value of the low-frequency band efficiency is only 22%, thereby influencing the antenna performance of the SISO antenna system; when the lower second 5G antenna 6 is switched from RF1 to RF2 through the first antenna tuning switch 3, the antenna resonance is switched from 880MHZ to 960MHZ to about 800MHZ, as shown by curve 002 in fig. 2, the low-frequency of the upper SISO antenna system is avoided, the isolation is shown as that the low-frequency band isolation is increased to about-25 DB as shown by curve 005 in fig. 3, the efficiency low-frequency peak efficiency is also increased to 27% as shown by curve 006 in fig. 4, and the improvement of the low-frequency performance of the SISO antenna system can be obviously seen, so the technology is suitable for the mobile communication terminal which needs to satisfy both the SISO antenna system and the MIMO antenna system.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A5G mobile phone antenna system is characterized in that: the mobile phone comprises a mobile phone main board (1), a first antenna tuning switch (3), a second antenna tuning switch (4), a first 5G antenna (5) and a second 5G antenna (6), wherein the first 5G antenna (5) and the second 5G antenna (6) are arranged at two opposite ends of the mobile phone main board (1), the first 5G antenna (5) and the second 5G antenna (6) can form an MIMO antenna, and the first 5G antenna (5) or the second 5G antenna (6) can be used as a SISO antenna; the first antenna tuning switch (3) is connected to the inner side ground position of the second 5G antenna (6), and the second antenna tuning switch (4) is connected to the inner side ground position of the first 5G antenna (5).

2. The 5G handset antenna system according to claim 1, wherein: the first 5G antenna (5) and the second 5G antenna (6) are respectively arranged at the upper end and the lower end of the mobile phone mainboard (1).

3. The 5G handset antenna system according to claim 1, wherein: and a parasitic element is connected to the first 5G antenna (5) and/or the second 5G antenna (6).

4. The 5G mobile phone antenna system according to any one of claims 1-3, wherein: the antenna switching device further comprises an antenna switching switch (2), and the antenna switching switch (2) is connected to the feeding points of the first 5G antenna (5) and the second 5G antenna (6).

5. The 5G handset antenna system according to claim 4, wherein: the antenna change-over switch (2) is a DPDT switch.