WO2017024668A1

WO2017024668A1 - Combined antenna system and mobile terminal

Info

Publication number: WO2017024668A1
Application number: PCT/CN2015/091364
Authority: WO
Inventors: 姚德才; 杨攀
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-08-12
Filing date: 2015-09-30
Publication date: 2017-02-16
Also published as: CN105024163A; CN105024163B

Abstract

Provided are a combined antenna system and a mobile terminal. The combined antenna system comprises a metal shell arranged at the rear part of a mobile terminal, an ultra-wideband antenna covering a high frequency band, and two three-dimensional coupled antennas covering a middle frequency band and a low frequency band respectively, wherein the metal shell comprises a first side shell, a middle shell, a second side shell, a first gap arranged between the first side shell and the middle shell, and a second gap arranged between the middle shell and the second shell; a mounting region is respectively provided at two ends of the first side shell, and a mounting region is respectively provided at two ends of the second side shell; and the ultra-wideband antenna and the two three-dimensional coupled antennas are respectively arranged at any three mounting regions. According to the combined antenna system provided in the present invention, coverage of a low frequency band, a middle frequency band and a high frequency band can be realized; and the product can have a maximum radiation efficiency at the low frequency band, the middle frequency band and the high frequency band by respectively tuning three antennas, so that the product can meet performance requirements of various network standards of a mobile terminal in the future.

Description

Combined antenna system and mobile terminal

Technical field

The present invention relates to the field of wireless communication technologies, and in particular to a combined antenna system and a mobile terminal having the combined antenna system.

Background technique

In the mobile terminal equipment industry such as mobile phones and tablet computers, as the user's experience requirements for the appearance and feel of the products continue to increase, the metal touch mobile products with good touch and excellent wear resistance become the mainstream of consumption in the industry. However, due to the special shielding performance of the metal back shell and metal frame decoration, the reliability of the antenna is seriously reduced. Therefore, in line with the development trend of the product, the design of the antenna is higher for the major manufacturers. Claim.

In order to solve the technical problem, an antenna system composed of a PIFA/slot antenna is proposed in the prior art, and the system controls the on and off of the grounding point through a switch on the circuit board to generate a required frequency band, but a large number of switch structures in the radio frequency link The introduction increases the additional loss of the antenna system, thereby reducing the radiation efficiency of the antenna system; in addition, the system has a large dependence on the feed/land position and the length and width of the whole machine, and the height of both sides of the feed is high. There is a deep mutual influence between the frequency branch and the low frequency branch. Since the resonant frequency of the antenna system itself is not easy to debug, any size deviation occurring in the production process will cause the resonance frequency of the antenna system to shift. The loss of the antenna system is increased, and on the other hand, the stability of the high frequency and ultra high frequency parts of the antenna is easily reduced, and the frequency bands of the high frequency and the ultra high frequency are narrowed, thereby reducing the reliability of the whole product.

Summary of the invention

In order to solve at least one of the above technical problems, it is an object of the present invention to provide a combined antenna system that can match a full metal casing, has high radiation efficiency, and can cover a high frequency band, a medium frequency band, and a low frequency band.

Another object of the present invention is to provide a mobile terminal having the above combined antenna system.

To achieve the above object, an embodiment of the first aspect of the present invention provides a combined antenna system for a mobile terminal, including: a metal case disposed at a rear portion of the mobile terminal, the metal case including a first side shell, a middle case and a second side case, and a first gap disposed between the first side case and the middle case and a second gap disposed between the middle case and the second side case; a broadband antenna is an antenna covering a high frequency band; and two stereo coupling antennas are respectively an antenna covering the middle frequency band and the low frequency band; wherein the two ends of the first side shell respectively have a mounting area, and the second side The two ends of the casing respectively have a mounting area, and the ultra-wideband antenna and the two stereo coupling antennas are respectively disposed on any three of the mounting areas.

It should be noted that, in the present scheme, the low frequency band refers to a frequency of 0.68 GHz to 1 GHz, the middle frequency band refers to a frequency of 1.5 GHz to 2.2 GHz, and the high frequency band refers to a frequency of 2.2 GHz to 2.7 GHz.

In addition, in the present scheme, the first slit and the second slit may be filled with a non-metal substance.

The combined antenna system provided by the embodiment of the first aspect of the present invention, the middle shell main ground, the ultra-wideband antenna and the two stereo coupling antennas are respectively disposed on the first side shell and the second side shell, and the first side shell and The second side shell acts as a radiation main body, thereby solving the problem that the antenna and the metal coexist in a large area, thereby realizing the matching of the product with the full metal outer casing, and reducing the loss of the signal of the human hand when operating the mobile terminal; in addition, the ultra-wideband in the present scheme The antenna dominates the high frequency band. The two stereo coupling antennas dominate the low frequency band and the medium frequency band respectively. The three work independently to achieve coverage of the medium frequency band, low frequency band and high frequency band, and avoid high frequency in the multi-frequency antenna. The problem of interaction between the segment and the middle band and the low band; in addition, the program can be tuned by three, so that the product has the highest radiation efficiency in the low frequency band, the middle frequency band and the high frequency band, thereby making the product Meet the performance requirements of various network standards for future mobile terminals.

In addition, the combined antenna system in the above embodiment provided by the present invention may further have the following additional technical features:

According to an embodiment of the invention, the combined antenna system further comprises: an ultra-wideband antenna, which is an antenna covering the high frequency band, and is disposed on the remaining one of the mounting areas.

According to an embodiment of the invention, the combined antenna system further comprises: a stereo coupling antenna, which is an antenna covering the high frequency band, and is disposed on the remaining one of the mounting areas.

According to an embodiment of the present invention, the first side shell is located on an upper side of the middle shell, the second side shell is located on a lower side of the middle shell; the stereo coupling antenna covering a middle frequency band and a low coverage The stereo coupling antennas of the frequency bands are respectively disposed on the two mounting areas of the second side shell.

By setting the structure, the two stereocouple antennas of the dominant low frequency band and the dominant middle frequency band are located at the lower part of the mobile terminal, thereby reducing the influence of the human hand and the head on the signal when the mobile terminal performs the call function.

According to an embodiment of the present invention, the ultra-wideband antenna includes: a ground feed point disposed at the first slit; and a main feed point disposed on a mounting area of the first side shell, and Electrically connecting with a radio frequency feed source inside the mobile terminal; wherein the ground feed point is located between the main feed point and another of the mounting areas of the first side shell.

According to an embodiment of the invention, the spacing between the primary feed point and the ground feed point is adjustable.

In this structure, the adjustment of the high-frequency resonance point of the ultra-wideband antenna can be realized by controlling the position of the main feed point and adjusting the spacing between the main feed point and the ground feed point.

According to an embodiment of the present invention, the second side shell includes a bottom plate and an end plate and a side plate connected to the bottom plate; the stereo coupling antenna includes a metal trace, the metal trace and the inside of the mobile terminal The RF feed is electrically connected, and the metal trace has a first gap, a second gap and a third gap between the bottom plate, the end plate and the side plate, respectively, to make the metal trace At the same time, energy is transferred by coupling with the bottom plate, the end plate and the side plate.

It can be understood by those skilled in the art that in this solution, the dominant length of the metal band can be controlled by adjusting the electrical length, shape and feeding position of the metal trace; in addition, in the structure, the metal traces are respectively connected to the bottom plate and the side plate and The end plate is coupled to feed, and the respective frequency bands of the coupled antenna device can be tuned by adjusting the sizes of the first gap, the second gap and the third gap, thereby reducing the radiation loss.

According to an embodiment of the present invention, the metal case further includes: a grounding device located in the second slit, and grounding the second side shell, and the grounding device separating the second slit into a plurality of a sub-slot; wherein a length of the sub-slot opposite to the stereo coupling antenna is 10 mm to 30 mm.

Specifically, the grounding device connects the steel sheets of the second side shell and the middle shell (main ground), the steel sheet is connected to the middle portion of the second side shell, and the steel sheet divides the second gap into a plurality of sub-slits, and the steel sheet is set by At a position on the second slit, the length of the sub-slit opposite the stereo-coupled antenna is controlled to be 10 mm to 30 mm so that it is tuned to the intermediate frequency portion of the combined antenna system.

According to an embodiment of the invention, the second side shell between the two stereo coupling antennas is provided with a wiring socket.

The wiring jack is a power line port or a data line port, and the structure is used to further weaken the current and signal interaction between the two stereo coupling antennas.

An embodiment of the second aspect of the present invention provides a mobile terminal comprising the combined antenna system described in any of the above embodiments.

The mobile terminal provided by the embodiment of the second aspect of the present invention has all the beneficial effects of the combined antenna system by providing the combined antenna system described in any of the above embodiments, and details are not described herein again.

Additional aspects and advantages of the invention will be apparent from the description of the invention.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural diagram of a combined antenna system according to an embodiment of the present invention;

Figure 2 is an enlarged schematic view of the portion A shown in Figure 1;

Figure 3 is an enlarged schematic view of the portion B shown in Figure 1;

4 is a schematic structural diagram of a combined antenna system according to another embodiment of the present invention;

Figure 5 is an enlarged schematic view of the portion C shown in Figure 4;

6 is a schematic view showing the positional relationship between the metal trace and the second side shell according to the present invention;

Wherein, the correspondence between the reference numerals in FIG. 1 to FIG. 6 and the component names is:

100 first side shell, 101 first bottom plate, 102 first end plate, 103 first side plate, 110 (110a, 110b) ultra-wideband antenna, 111 (111a, 111b) main feed point, 112 (112a, 112b) Feed point, 120 first stereo coupling antenna, 121 first metal trace, 200 middle shell, 300 second side shell, 301 second bottom plate, 302 second end plate, 303 second side plate, 310 (310a, 310b) a second stereo coupling antenna, 311 (311a, 311b) second metal trace, 400 first slit, 500 second slit.

detailed description

The present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that in the absence of conflict In this case, the features of the embodiments and the embodiments of the present application can be combined with each other.

In the following description, numerous specific details are set forth in order to provide a full understanding of the invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

A combined antenna system in accordance with some embodiments of the present invention is described below with reference to FIGS. 1 through 6.

As shown in FIG. 1 and FIG. 6 , a combined antenna system provided by an embodiment of the first aspect of the present invention is provided for a mobile terminal, including: a metal shell disposed at a rear portion of the mobile terminal, the metal shell including the first side shell 100, a shell 200 and a second side shell 300, and a first slit 400 disposed between the first side shell 100 and the middle shell 200 and a second slit 500 disposed between the middle shell 200 and the second side shell 300; ultra-wideband The antenna 110a is an antenna covering a high frequency band; and two stereo coupling antennas 310 are respectively a second stereo coupling antenna 310a covering the middle frequency band and a second stereo coupling antenna 310b covering the low frequency band; wherein the two sides of the first side shell 100 are The ends respectively have a mounting area, and both ends of the second side shell 300 respectively have a mounting area, and the ultra-wideband antenna 110a and the two second stereo coupling antennas 310 are respectively disposed on any three mounting areas.

In addition, in the present solution, the first slit 400 and the second slit 500 may be filled with a non-metal substance.

In the combined antenna system provided by the embodiment of the first aspect of the present invention, the middle casing 200 is grounded, and the ultra-wideband antenna 110 and the two stereo coupling antennas 310 are respectively disposed on the first side shell 100 and the second side shell 300, and are utilized. The first side shell 100 and the second side shell 300 act as a radiation main body, thereby solving the problem that the antenna and the metal coexist in a large area, thereby achieving matching of the product with the full metal outer casing, and reducing the loss of the signal of the human hand when operating the mobile terminal. In addition, in this solution, the ultra-wideband antenna 110 dominates the operation of the high frequency band, and the two second stereo coupling antennas 310 respectively dominate the operation of the low frequency band and the middle frequency band, and the three work relatively independently to achieve the product center frequency band, low frequency band and high frequency band. Coverage, and can avoid the problem of interaction between the high frequency band and the medium frequency band and the low frequency band in the multi-frequency antenna; in addition, in this solution, the three can be tuned separately to make the products in the low frequency band, the middle frequency band and the high frequency band. Both have the highest radiation efficiency, so that the product meets the performance requirements of various network standards of mobile terminals in the future.

In one embodiment of the present invention, as shown in FIGS. 1 and 4, the first side shell 100 is located on the upper side of the middle case 200, the second side case 300 is located on the lower side of the middle case 200, and covers the second side of the middle band 200. Stereo coupling The antenna 310a and the second stereo coupling antenna 310b covering the low frequency band are respectively disposed on the two mounting areas of the second side case 300.

In this embodiment, by setting the structure such that the two stereo coupling antennas 310 of the dominant low frequency band and the dominant mid-band are located at the lower portion of the mobile terminal, thereby reducing the human hand and head pair signals when the mobile terminal performs the call function. Impact.

Specifically, as shown in FIG. 1 , FIG. 3 and FIG. 4 , the second side shell 300 includes a second bottom plate 301 and a second end plate 302 and a second side plate 303 connected to the second bottom plate 301 ; 310 includes a second metal trace 311, that is, a second metal trace 311a and a second metal trace 311b, which are respectively electrically connected to the RF feed source inside the mobile terminal, and as shown in FIG. The second metal trace 311 and the second bottom plate 301, the second end plate 302, and the second side plate 303 respectively have a first gap, a second gap, and a third gap, so that the second metal trace 311 is simultaneously and second. The bottom plate 301, the second end plate 302, and the second side plate 303 transfer energy by coupling.

It can be understood by those skilled in the art that in this solution, the electrical length, shape and feeding position of the second metal trace 311 can be adjusted to control the operation of the dominant intermediate frequency and the low frequency; in addition, as shown in FIG. The second metal traces 311 are respectively coupled to the second bottom plate 301, the second side plate 303, and the second end plate 302, and are adjusted by adjusting the size s1 of the first gap, the size s2 of the second gap, and the third gap. The size s3 can tune the respective frequency bands of the stereo coupling antenna 310, thereby reducing its radiation loss.

Specifically, the specific shape of the second metal trace 311 in the present solution is not limited by the view, and the designer can control the second stereo coupling by setting the number of branches of the second metal trace 311a and the length of each branch. The antenna 310a controls the respective frequency bands of the intermediate frequency. By setting the number of branches of the second metal trace 311b and the length of each branch, the second stereocoupled antenna 310b can control the respective frequency bands of the dominant intermediate frequency, and pass through the second metal traces 311 and respectively. The second bottom plate 301, the second side plate 302 and the second end plate 303 are coupled to feed each frequency band of the intermediate frequency and the low frequency; in the above structure, the designer can comprehensively meet the working frequency requirement of the product and the size requirement of the mobile terminal. A size s1 of the first gap, a size s2 of the second gap, and a size s3 of the third gap may be set so that the stereo coupling antenna 310 can cover the respective frequency bands of the intermediate frequency and the low frequency.

In addition, the metal case further includes: a grounding device (not shown) located in the second slot 500, and grounding the second side shell 300, and the grounding device divides the second slot 500 into a plurality of sub-slits; The length of one sub-slot opposite to the second three-dimensional coupling antenna 310a is 10 mm to 30 mm, and the length of one sub-slot opposite to the second three-dimensional coupling antenna 310b is 10 mm to 30 mm.

Specifically, the grounding device connects the steel sheets of the second side shell 300 and the middle shell 200 (main ground), the steel sheet is connected to the middle portion of the second side shell 300, and the steel sheet divides the second slit 500 into a plurality of sub-slits, By setting the position of the steel sheet on the second slit 500, the length of the sub-slit opposite to the second stereo coupling antenna 310 is controlled to be 10 mm to 30 mm so that it is tuned to the intermediate frequency portion of the combined antenna system.

In an embodiment of the present invention, as shown in FIGS. 1 and 2, the ultra-wideband antenna 110 includes: a ground feed point 111 disposed at the first slot 400; and a main feed point 112 disposed at the first side shell 110 And a mounting area of the mobile terminal is electrically connected to the RF feed source inside the mobile terminal; wherein the ground feed point 111 is located between the main feed point 112 and another mounting area of the first side shell 110.

Further, the spacing between the main feed point 111 and the ground feed point 112 is adjustable.

In this configuration, the adjustment of the high frequency resonance point of the ultra-wideband antenna 110 can be realized by controlling the position of the main feed point and adjusting the spacing between the main feed point 111 and the ground feed point 112.

In an embodiment of the present invention, as shown in FIG. 1 to FIG. 3, the combined antenna system includes: a second stereo coupling antenna 311a covering a middle frequency band, a second stereo coupling antenna 311b covering a low frequency band, and an ultra-high frequency band covering Broadband antenna 110a and ultra-wideband antenna 110b.

As shown in FIG. 1 to FIG. 3, the two ultra-wideband antennas 110 are disposed on the first side shell 100 and both lead to the high frequency band operation; in this structure, the first side shell 100 is directly used without providing other traces. As a radiator of a high frequency band, and adjusting the position of the main feed point 111 to adjust the high frequency resonance point; specifically, the signal is fed from the main feed point 111a and the main feed point 111b, and after being matched with the first side shell 100, Feeding from the ground feed point 112a and the ground feed point 112b, respectively, by setting the positions of the main feed point 111a and the main feed point 111b, and controlling the spacing between the main feed point 111a and the ground feed point 112a, and controlling the main feed point 111b The spacing between the ground feed points 112b is used to tune the various frequency bands of the high frequency.

In another embodiment of the present invention, as shown in FIG. 4 and FIG. 5, the combined antenna system includes: a second stereocouple antenna 311a covering the middle frequency band, a second stereocouple antenna 311b covering the low frequency band, and a high frequency band. The ultra-wideband antenna 110 and the first stereo coupling antenna 120.

The positional relationship between the first stereo coupling antenna 120 and the first side shell 100 is the same as the positional relationship between the second stereo coupling antenna 311 and the second side shell 300. Specifically, the first side shell 100 includes a first bottom plate. 101 and a first end plate 102 and a first side plate 103 connected to the first bottom plate 101; the first three-dimensional The first metal trace 121 of the coupled antenna 120 is electrically connected to the RF feed source inside the mobile terminal, and the first metal trace 121 and the first bottom plate 101, the first end plate 102, and the first side plate 103 respectively have a first a gap, a second gap, and a third gap, so that the first metal trace 121 simultaneously transmits energy to the first bottom plate 101, the first end plate 102, and the first side plate 103 by coupling, by setting a suitable first The size of the gap, the size of the second gap, and the size of the third gap are such that the stereo coupling antenna 120 can cover the respective frequency bands of the high frequency.

An embodiment of the second aspect of the present invention provides a mobile terminal (not shown) including the combined antenna system described in any of the above embodiments.

In summary, the combined antenna system provided by the present invention, the middle shell main ground, the ultra-wideband antenna and the two stereo coupling antennas are respectively disposed on the first side shell and the second side shell, and utilize the first side shell and the first side The two-sided shell acts as a radiation main body to solve the problem of coexistence of the antenna and the large area of the metal, thereby achieving the matching of the product with the full metal casing, and reducing the loss of the signal of the human hand when operating the mobile terminal; in addition, the ultra-wideband antenna in the present scheme Leading the work of the high frequency band, the two stereo coupled antennas dominate the work of the low frequency band and the middle frequency band respectively, and the three work relatively independently to achieve the coverage of the product in the middle frequency band, the low frequency band and the high frequency band, and can avoid the high frequency band of the multi-frequency antenna. The problem of interaction with the middle and low frequency bands; in addition, the program can be tuned by three, so that the product has the highest radiation efficiency in the low frequency band, the middle frequency band and the high frequency band, so that the product meets the requirements. The performance requirements of various network standards for mobile terminals in the future.

In the present invention, the terms "first", "second", and "third" are used for the purpose of description only, and are not to be construed as indicating or implying relative importance; the term "plurality" means two or two. Above, unless otherwise explicitly defined. The terms "installation", "connected", "connected", "fixed" and the like should be understood broadly. For example, "connecting" may be a fixed connection, a detachable connection, or an integral connection; "connected" may They are directly connected or indirectly connected through an intermediary. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the description of the present invention, it is understood that the orientation or positional relationship of the terms "upper", "lower" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description. Not indicating or implying that the device or unit referred to must have a specific orientation, in a specific orientation The construction and operation are therefore not to be construed as limiting the invention.

In the description of the present specification, the description of the terms "one embodiment", "specific embodiment" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment of the invention or In the example. In the present specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A combined antenna system for a mobile terminal, comprising:

a metal shell disposed at a rear portion of the mobile terminal, the metal shell including a first side shell, a middle shell and a second side shell, and a first gap disposed between the first side shell and the middle shell And a second gap disposed between the middle case and the second side case;

Ultra-wideband antenna for covering high frequency bands; and

Two stereo coupling antennas, respectively, covering the middle frequency band and the low frequency band;

The two ends of the first side shell respectively have a mounting area, and the two ends of the second side shell respectively have a mounting area, and the ultra-wideband antenna and the two stereo coupling antennas are respectively disposed at any Three of the installation areas are on.
The combined antenna system of claim 1 further comprising:

An ultra-wideband antenna is an antenna covering a high frequency band and is disposed on the remaining one of the mounting areas.
The combined antenna system of claim 1 further comprising:

A stereo coupling antenna is an antenna covering a high frequency band and is disposed on the remaining one of the mounting areas.
A combined antenna system according to any one of claims 1 to 3, characterized in that

The first side shell is located on an upper side of the middle shell, and the second side shell is located on a lower side of the middle shell;

The stereo coupling antenna covering the middle frequency band and the stereo coupling antenna covering the low frequency band are respectively disposed on the two mounting areas of the second side shell.
The combined antenna system of claim 4 wherein said ultra-wideband antenna comprises:

a ground feed point disposed at the first slit; and

a main feed point disposed on a mounting area of the first side shell and electrically connected to a radio frequency feed inside the mobile terminal;

Wherein the ground feed point is located between the main feed point and another said mounting area of the first side shell.
The combined antenna system of claim 5 wherein:

The spacing between the primary feed point and the ground feed point is adjustable.
The combined antenna system of claim 4 wherein:

The second side shell includes a bottom plate and end plates and side plates connected to the bottom plate;

The stereo coupling antenna includes a metal trace electrically connected to a radio frequency feed inside the mobile terminal, and the metal trace is interposed between the metal substrate, the end plate, and the side plate There is a first gap, a second gap and a third gap, respectively, such that the metal traces simultaneously transfer energy to the bottom plate, the end plate and the side plates by coupling.
The combined antenna system according to claim 7, wherein the metal shell further comprises:

a grounding device, located in the second slot, grounding the second side shell, and the grounding device separating the second slot into a plurality of sub-slits;

The length of one of the sub-slits opposite to the three-dimensional coupling antenna is 10 mm to 30 mm.
The combined antenna system of claim 4 wherein:

A wiring socket is defined in the second side shell between the two stereo coupling antennas.
A mobile terminal characterized by comprising the combined antenna system according to any one of claims 1 to 9.