CN108155474B

CN108155474B - Antenna device and mobile communication equipment

Info

Publication number: CN108155474B
Application number: CN201611104692.XA
Authority: CN
Inventors: 杨广立; 汤小俊; 于玉梅
Original assignee: Molex LLC; University of Shanghai for Science and Technology
Current assignee: Molex LLC; University of Shanghai for Science and Technology
Priority date: 2016-12-05
Filing date: 2016-12-05
Publication date: 2021-06-25
Anticipated expiration: 2036-12-05
Also published as: CN108155474A

Abstract

The invention provides an antenna device and a mobile communication device. The first resonant antenna comprises a metal shell and a metal sheet, wherein the metal shell comprises a metal back plate and a metal frame which are integrally formed, and the metal frame surrounds the metal back plate; the metal sheet and the metal shell are encircled to form a non-closed cavity, and at least one gap and at least one opening part are formed between the periphery of the metal sheet and the metal frame. The second resonance antenna is located at the opening, and includes a radiation unit and a coupling unit. The antenna device and the mobile communication equipment respectively work in a GPS signal frequency band and a WIFI signal frequency band through the first resonant antenna and the second resonant antenna, so that GPS and WIFI communication is realized under the condition of an all-metal shell.

Description

Antenna device and mobile communication equipment

Technical Field

The present invention relates to the field of antennas, and in particular, to an antenna device and a mobile communication device.

Background

On current wireless communication equipment, all-metal housings are increasingly used due to advantages such as beautiful appearance, large structural strength, superior heat conductivity, and the like. Wireless communication devices generally perform electromagnetic signal transmission through an antenna device, which is easily shielded and interfered by a metal housing during signal reception and transmission.

To overcome signal shielding and interference, the housings of prior art wireless communication devices are typically made of two parts, namely a metallic part and a non-metallic spacer. The antenna radiating element is designed at the non-metal interval of the shell, so that the radiation of the antenna is not shielded by the metal part or the influence of the metal shell is reduced to the maximum extent. However, this prior art cannot realize a complete metal housing, but adds a partial non-metal housing to reduce the shielding of the antenna radiation, thereby not only affecting the aesthetic appearance and the structural strength, but also making the processing process complicated and increasing the cost.

Meanwhile, in the current wireless communication device, a GPS antenna and a WIFI antenna become indispensable components. Therefore, the GPS and WIFI functions are simultaneously implemented in the wireless communication device whose housing is completely metal, and the signal transmission and reception are not interfered and become a technical difficulty.

Disclosure of Invention

The invention aims to provide an antenna device and a mobile communication device, which can effectively transmit and receive GPS and WIFI signals under the condition that the casing of the antenna device is completely metal.

According to a first aspect of the present invention, there is provided an antenna device comprising: a first resonant antenna and a second resonant antenna; the first resonant antenna comprises a metal shell, the metal shell comprises a metal back plate and a metal frame which are integrally formed, and the metal frame surrounds the metal back plate; the metal sheet and the metal shell are encircled to form a non-closed cavity, and at least one opening part and at least one gap are formed between the periphery of the metal sheet and the metal shell; the second resonant antenna is positioned at the opening part and comprises a radiation unit, and the radiation unit is connected with the metal shell; and a coupling unit coupling-feeding the radiation unit.

Preferably, the outer periphery of the metal sheet has four sides adjacent to the metal case, one side of the metal sheet forms an opening with the metal case, and at least one of the remaining three sides forms a gap with the metal case.

Preferably, each of the remaining three sides forms a gap with the adjacent partial metal frame.

Preferably, the coupling unit includes a first strip conductor and a second strip conductor connected; the first end of the first strip lead is connected with the first end of the second strip lead, the second strip lead is coupled with the metal shell, and the first strip lead comprises a feed-in end.

Preferably, the radiating unit includes a third strip conductor, a fourth strip conductor, and a fifth strip conductor connected, a first end of the fifth strip conductor is connected to a second end of the third strip conductor, a second end of the fifth strip conductor is connected to the metal case, and the third strip conductor, the fourth strip conductor, and the fifth strip conductor form a U shape.

Preferably, the second resonance antenna further includes an insulating substrate provided in the opening portion, the insulating substrate carrying the radiation unit and the coupling unit.

According to a second aspect of the present invention, there is provided a mobile communication device comprising an antenna arrangement and a circuit board; the antenna device includes: a first resonant antenna and a second resonant antenna; the first resonant antenna comprises a metal shell, the metal shell comprises a metal back plate and a metal frame which are integrally formed, and the metal frame surrounds the metal back plate; the metal sheet and the metal shell are encircled to form a non-closed cavity, and at least one opening part and at least one gap are formed between the periphery of the metal sheet and the metal shell; the second resonant antenna is positioned at the opening part and comprises a radiation unit, and the radiation unit is connected with the metal shell; the coupling unit is used for coupling and feeding power to the radiation unit; the circuit board is connected with the coupling unit through the feeding unit.

Preferably, a gap is formed between each of the remaining three sides and the adjacent partial metal shell, and the opening part and the gap are communicated with each other.

Preferably, the radiating element is formed by a strip conductor, and the length of the strip conductor of the radiating element is equal to 1/4 of the wavelength of the operating frequency band of the second resonant antenna.

Preferably, the operating frequency bands of the first resonant antenna and the second resonant antenna are different.

Preferably, the working frequency band of the first resonant antenna is a GPS signal frequency band, and the working frequency band of the second resonant antenna is a WIFI signal frequency band of the first frequency.

Preferably, the working frequency band of the first resonant antenna is a WIFI signal frequency band of the first frequency, and the working frequency band of the second resonant antenna is a GPS signal frequency band.

Preferably, the operating frequency band of the first resonant antenna further includes a WIFI signal frequency band of the second frequency.

Preferably, the length from the feeding end to the second end of the first strip conductor is equal to 1/4 of the wavelength of the WIFI signal frequency band of the second frequency, and the operating frequency band of the third resonant antenna is the WIFI signal frequency band of the second frequency.

Preferably, the mobile communication device further includes a display device disposed on a side of the metal sheet opposite to the metal back plate.

Preferably, the mobile communication device further includes: and the signal transceiving device is electrically connected with the circuit board and is used for outputting power so that the feeding end feeds power to the antenna device and receiving signals received by the antenna device.

Due to the adoption of the technology, the antenna device and the mobile communication equipment respectively work in a GPS frequency band and a WIFI frequency band through the first resonant antenna consisting of the non-closed cavity and the second resonant antenna consisting of the radiation unit and the coupling unit, so that GPS and WIFI communication is realized under the condition of an all-metal shell.

Drawings

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments so that the features and advantages of the present invention will be more apparent.

Fig. 1 is a schematic perspective view of an antenna device according to an embodiment of the present invention;

fig. 2 is a schematic top view of an antenna device according to an embodiment of the invention;

fig. 3 is a schematic cross-sectional view of an antenna device at a feeding unit according to an embodiment of the present invention;

FIGS. 4a-4d are schematic top views of a first resonant antenna of the present invention including different strip gaps;

FIG. 5 is an enlarged schematic view of portion A of FIG. 2;

FIG. 6 is a block diagram of a mobile communication device according to an embodiment of the present invention;

fig. 7 is a frequency return loss diagram of a mobile communication device in an embodiment of the invention.

Reference numerals

1 Mobile communication device

10 antenna device

101 first resonant antenna

1011 Metal casing

10111 Metal backboard

10112 Metal frame

1012 sheet metal

1013 gap

10131 strip gap

1014 opening part

102 second resonant antenna

1021 radiation unit

10211 third conductor ribbon

10212 fourth strip conductor

10213 fifth strip conductor

1022 coupling unit

10221 first strip conductor

102211 first end of first ribbon wire

10222 second ribbon conductor

1023 feed-in terminal

1024 insulating substrate

103 third resonant antenna

1031 second end of first ribbon wire

11 feeding unit

12 circuit board

13 display device

14 signal receiving and transmitting device

21 GPS signal frequency band curve segment

22 WIFI signal frequency band curve segment of first frequency

23 WIFI signal frequency band curve segment of second frequency

Detailed Description

Hereinafter, a detailed description will be given of embodiments of the present invention. While the invention will be described and illustrated in connection with certain specific embodiments thereof, it should be understood that the invention is not limited to those embodiments. Rather, modifications and equivalents of the invention are intended to be included within the scope of the claims.

Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and components are not shown in detail in order not to obscure the subject matter of the invention.

Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Fig. 1 is a perspective view of an antenna device according to an embodiment of the invention. Fig. 2 is a schematic top view of an antenna device according to an embodiment of the invention. Fig. 3 is a schematic cross-sectional view of an antenna device at a feeding unit according to an embodiment of the present invention.

As shown in fig. 1, 2, and 3, an antenna device 10 according to a first embodiment of the present invention includes a first resonance antenna 101 and a second resonance antenna 102.

First, the first resonant antenna 101 will be described. The first resonant antenna 101 is a non-closed cavity, and includes a metal housing 1101 and a metal sheet 1012, where the metal sheet 1012 and the metal housing 1101 enclose a non-closed cavity. In the present embodiment, first resonant antenna 101 has a rectangular parallelepiped shape, but it is conceivable that first resonant antenna 101 may have another shape in other embodiments.

The metal housing 1101 includes a metal back panel 10111 and a metal rim 10112, and the metal rim 10112 surrounds the metal back panel 10111. The metal back plate 10111 and the metal frame 10112 are integrally formed, that is, there is no gap between the metal back plate 10111 and the metal frame 10112, and there is no non-metal space in the prior art.

In this embodiment, the metal sheet 1012 has a rectangular shape with four sides connected. The metal sheet 1012 may take other shapes in other embodiments, such as a diamond shape or a trapezoid shape.

At least one gap 1013 and at least one opening 1014 are formed between the outer periphery of metal sheet 1012 and metal bezel 10112, that is, first resonant antenna 101 is non-closed, so that first resonant antenna 101 can emit a signal of a certain frequency when first resonant antenna 101 is directly fed or coupled fed through feeding unit 11. In the present invention, at least one gap 1013 is formed between the outer periphery of the metal sheet 1012 and the metal frame 10112, but not formed at other positions on the metal sheet 1012, such an arrangement ensures the integrity of the metal housing of the antenna device 10 and facilitates processing, and on the other hand, the arrangement of the other parts, such as a display device, on the side of the metal sheet 1012 opposite to the metal back 10111 does not affect signal transmission and reception.

Direct feeding here means that feeding section 11 feeds power to first resonator antenna 101 by directly contacting first resonator antenna 101, and coupled feeding means that feeding section 11 feeds power to first resonator antenna 101 without directly contacting first resonator antenna 101. The present embodiment adopts a coupling feeding manner, and as shown in fig. 2 and fig. 3, a circuit board 12 is provided inside the first resonant antenna 101, and one end of the feeding unit 11 is connected to the circuit board 12 to obtain an excitation current from the circuit board 12. The other end of feed unit 11 is connected to second resonant antenna 102, and is not connected to first resonant antenna 101, but first resonant antenna 101 is excited to resonate at a specific resonant frequency.

The resonant frequency of the first resonant antenna 101 is mainly determined by the length, width and height of the non-closed cavity. Specifically, the cavity 100 in the shape of a rectangular parallelepiped in the present embodiment has a length a, a width b, and a height c, and the resonant frequency f1 of the first resonant antenna 101 satisfies the following formula:

m, n, p ═ 0, 1, 2, 3, 4 … (integer)

Where v is the speed of light in air. The same first resonant antenna 101 has multiple modes (modes), and different combinations of m, n, and p represent different modes, and the different modes correspond to different resonant frequencies, that is, the first resonant antenna 101 has multiple operating frequency bands. The first mode corresponds to a first working frequency band, and the second mode corresponds to a second working frequency band.

The resonant frequency of first resonant antenna 101 is also affected by the length and number of gaps 1013. The metal sheet 1012 has four sides adjacent to the metal case 1011 at the outer periphery thereof, an opening 1014 is formed between one side and the metal case 1011, and a linear gap 10131 is formed between at least one side of the remaining three sides and the adjacent partial metal frame 10112. As the number of the strip gaps 10131 increases and the total length increases, the resonance frequency of the first resonant antenna 101 decreases. Fig. 4a-4d are schematic top views of a first antenna of the invention comprising different strip gaps.

As an alternative embodiment, as shown in fig. 4a, a strip gap 10131 is formed between one side of the metal sheet 1012 and the adjacent partial metal frame 10112. The position of the one stripe gap 10131 is not limited to the position shown in fig. 4a, but may be formed between any one side of the metal piece 1012 other than the position of the opening 1014 and the adjacent partial metal bezel 10112.

As another alternative, as shown in fig. 4b, two connected edges of the metal sheet 1012 and the adjacent partial metal frame 10112 form a strip gap 10131, and the two strip gaps 10131 are communicated with each other. The position of the two strip gaps 10131 is also not limited to the position shown in fig. 4 b.

As another alternative, as shown in fig. 4c, a strip-shaped gap 10131 is formed between each of the remaining three sides of the metal sheet 1012 and the adjacent partial metal rim 10112, and the three strip-shaped gaps 10131 are not communicated.

As another alternative, as shown in fig. 4d, a strip-shaped gap 10131 is formed between each of the remaining three sides of the metal sheet 1012 and the adjacent partial metal frame 10112, and the three strip-shaped gaps 10131 are communicated, that is, the three strip-shaped gaps 10131 are communicated end to form a ring shape.

As can be seen from the above description, the gap 1013 is set as the strip gap 10131 between at least one side of the periphery of the metal sheet 1012 and the adjacent local metal frame 10112, so that on one hand, the overall arrangement of the all-metal housing can be ensured, and on the other hand, when the resonant frequency of the first resonant antenna 101 needs to be adjusted, the number or the length of the strip gaps 10131 may be adjusted, which is simpler and more convenient to adjust compared with the arrangement of other gaps.

In the first embodiment of the invention the arrangement of the gap 1013 as shown in fig. 4d is used, i.e. the first resonator antenna 101 comprises one opening 1014 and three communicating strip gaps 10131. However, as can be seen from the above description, since the resonant frequency of the first resonant antenna 101 decreases as the number of the bar gaps 10131 increases and the total length increases, the first resonant antenna 101 can be operated at a specific frequency by designing the length, width, height of the first resonant antenna 101 and by designing the number and length of the gaps 1013 in cooperation.

The structure of the second resonant antenna 102 is described below.

As shown in fig. 1, 2, and 3, second resonator antenna 102 is located in opening 1014, and second resonator antenna 102 is fed by feeding section 11, and in this embodiment, second resonator antenna 102 is directly fed by feeding section 11, unlike first resonator antenna 101. In the case of direct feeding, the first feeding unit 11 may be implemented by a spring probe, a metal dome, or a wire.

The second resonance antenna 102 includes a radiation unit 1021 and a coupling unit 1022. The radiation unit 1021 is connected to the metal housing 1011. The coupling unit 1022 includes a feeding terminal 1023 connected to the feeding unit 11, so as to obtain an excitation current from the circuit board 12 through the feeding unit 11 and couple the feeding to the radiating unit 1021.

Fig. 5 is an enlarged schematic view of a portion a in fig. 2. As shown in fig. 2, 3 and 5, the radiating unit 1021 is made of a strip conductor, and the length of the strip conductor of the radiating unit 1021 is equal to 1/4 of the wavelength of the operating band of the second resonant antenna 102. It is noted that the term "equal" is used to indicate that a value of error is included, that a value of error is not required to be exactly equal, and that the same is true for the following description of the value of error. Since the operating frequency band is usually a range of values, the length of the strip conductor of the radiating element 1021 may also be a range of values.

In the present embodiment, the coupling unit 1022 includes a first stripline 10221 and a second stripline 10222 connected. The first ribbon wire 10221 includes a first end 102211 of the first ribbon wire and a second end 1031 of the first ribbon wire. The first end 102211 of the first ribbon conductor is connected to a first end of the second ribbon conductor 10222. The first strip lead 10221 includes the feeding end 1023 connected to the feeding unit 11, in this embodiment, the feeding end 1023 is located between the first end 102211 of the first strip lead and the second end 1031 of the first strip lead, and in other modified embodiments, the feeding end 1023 may coincide with the second end 1031 of the first strip lead. The excitation current flows through the feed terminal 1023 to the first end 102211 of the first ribbon wire and then through the second ribbon wire 10222 via the first end of the second ribbon wire 10222. Therefore, in the present embodiment, the coupling unit 1022 of the second resonant antenna 102 refers to the first end 102211 from the feeding end 1023 to the first strip conductor and the second strip conductor 10222.

The radiation unit 1021 includes a third strip line 10211, a fourth strip line 10212, and a fifth strip line 10213 connected, the third strip line 10211 being parallel to the second strip line 10222, the fourth strip line 10212 being parallel to the first strip line 10221. A first end of the fifth strip conductor 10213 is connected to a second end of the third strip conductor 10211, a second end of the fifth strip conductor 10213 is connected to the metal housing 1011, and the third strip conductor 10211, the fourth strip conductor 10212 and the fifth strip conductor 10213 form a U-shape. An elastic conductive member such as a spring probe or a metal dome is generally provided at the metal bezel 10112 connected to the second end of the fifth strip conductor 10213, so that the fifth strip conductor 10213 can be stably connected to the metal bezel 10112. The total length of the third stripline 10211, the fourth stripline 10212, and the fifth stripline 10213 is equal to 1/4 of the wavelength of the operating band of the second resonant antenna. It should be noted that in other embodiments, the radiating element 1021 may have other shapes, but it is necessary that the length of the strip line of the radiating element 1021 is equal to 1/4 of the wavelength of the operating band of the second resonant antenna.

The second stripline 10222 is coupled to the metal housing 1011, i.e., there is no contact between the second stripline 10222 and its adjacent metal bezel 10112. The second stripline 10222 is parallel to its adjacent metal border 10112 and perpendicular to the first stripline 10221. Since second stripline 10222 is coupled to metal housing 1011, second resonant antenna 102 borrows metal housing 1011 between second stripline 10222 and the second end of fifth stripline 10213, such that the portion of metal housing 1011 becomes part of second resonant antenna 102.

When the feeding end 1023 of the coupling unit 1022 obtains an excitation current from the circuit board 12 through the feeding unit 11, part of the electromagnetic path of the second resonant antenna 102 is from the feeding end 1023 to the first end 102211 of the first strip conductor, through the metal housing 1011 between the second strip conductor 10222 and the second end of the fifth strip conductor 10213, to the fifth strip conductor 10213, the third strip conductor 10211 and the fourth strip conductor 10212.

With continued reference to fig. 2, 3, and 5, second resonant antenna 102 further includes an insulating substrate 1024, and insulating substrate 1024 is disposed in opening 1014 for carrying radiating element 1021 and coupling element 1022, so that second resonant antenna 102 is well insulated from other components.

As shown in fig. 2 and 5, in order to improve the practicability of the antenna device 10, as an alternative embodiment, the antenna device 10 according to the first embodiment of the present invention further includes a third resonant antenna 103. The third resonant antenna 103 is configured to be directly fed from the feeding end 1023 to the second end 1031 of the first strip conductor, and the third resonant antenna 103 is also directly fed through the feeding unit 11. The length of third resonant antenna 103 is equal to 1/4 wavelengths of the operating band of third resonant antenna 103. It should be noted that, the meaning of approximately equal here may include a certain error value, and does not require that a certain value be exactly equal.

Fig. 6 is a block diagram of a mobile communication device according to an embodiment of the invention. The mobile communication device 1 of the present invention is described below with reference to fig. 6.

As shown in fig. 6, the mobile communication apparatus 1 includes an antenna device 10, a circuit board 12, a power feeding unit 11, a display device 13, and a signal transceiving device 14.

Antenna device 10 includes a first resonant antenna 101, a second resonant antenna 102, and a third resonant antenna 103. The rear housing of the mobile communication device 1 is a metal housing 1101 of the first resonant antenna 101 of the antenna apparatus 10, and includes a metal back board 10111 and a metal frame 10112 which are integrally formed. The specific structure of the antenna device 10 is as described above, and will not be described herein.

The circuit board 12 is connected to the feed end 1023 through the feed unit 11, the feed unit 11 is disposed on the circuit board 12, the circuit board 12 supplies an excitation current to the feed unit 11, and the feed unit 11 couples and feeds the first resonant antenna 101 through the feed end 1023. The feeding terminal 1023 is connected to the coupling unit 1022 to couple and feed the radiation unit 1021 of the second resonance antenna 102. The feeding unit 11 directly feeds power to the third resonance antenna 103 through the feeding terminal 1023.

The operating frequency bands of first resonant antenna 101 and second resonant antenna 102 are different. FIG. 7 is a frequency return loss diagram of a mobile communication device in an embodiment of the invention

As shown in fig. 7, the abscissa indicates the frequency, the ordinate indicates the ratio of the incident power to the reflected power, and a smaller ordinate indicates a stronger emission efficiency at the frequency. In the present invention, the mobile communication device 1 has a GPS signal frequency band curve 21, a WIFI signal frequency band curve 22 of the first frequency, and a WIFI signal frequency band curve 23 of the second frequency, respectively, so as to prove that the mobile communication device 1 works in the GPS signal frequency band (i.e., 1575.42MHz ± 2MHz), the WIFI signal frequency band of the first frequency (i.e., 2.4GHz to 2.483GHz), and the WIFI signal frequency band of the second frequency (i.e., 5.15GHz to 5.85 GHz).

When the working frequency band of the first resonant antenna 101 is the GPS signal frequency band, the working frequency band of the second resonant antenna 102 is the WIFI signal frequency band of the first frequency. When the working frequency band of the first resonant antenna 101 is the WIFI signal frequency band of the first frequency, the working frequency band of the second resonant antenna 102 is the GPS signal frequency band. During actual use, the working frequency bands of the first resonant antenna 101 and the second resonant antenna 102 can be configured as required, so that under the condition of an all-metal shell, GPS and WIFI communication can be flexibly and effectively realized.

Because first resonant antenna 101 has a plurality of modals, wherein can produce the WIFI signal of GPS modality and first frequency, first resonant antenna 101 also can produce simultaneously and correspond the operating frequency channel and be the WIFI signal frequency channel of second frequency.

The working frequency band of the third resonant antenna 103 is the WIFI signal frequency band of the second frequency, so that the practicability of the antenna device 10 is improved, and the communication of the mobile communication device 1 in the WIFI signal frequency band of the second frequency is ensured.

With continued reference to fig. 6, signal transceiver 14 is electrically connected to circuit board 12, and when mobile communication device 1 needs to send out a signal, signal transceiver 14 outputs power and causes feeding unit 11 to feed first resonant antenna 101, second resonant antenna 102, and third resonant antenna 103 of antenna device 10 through circuit board 12. When first resonant antenna 101, second resonant antenna 102, or third resonant antenna 103 of antenna device 10 receives a signal, signal transmission/reception device 14 receives a signal received by antenna device 10.

The display device 13 is disposed on a side of the metal sheet 1012 of the antenna device 10 opposite to the metal back plate 10111. The metal sheet 1012 may also serve as a shielding sheet for the display device 13 at the same time, for shielding the display device 13 from interfering electromagnetic fields.

The mobile communication device 1 generally further includes other modules or components, such as a processor, an audio input/output module, etc., and the other modules or components may be components of the mobile communication device in the prior art, which are not described herein again.

In summary, the antenna device 10 and the mobile communication device 1 including the antenna device 10 of the present invention include a first resonant antenna 101 and a second resonant antenna 102, wherein the first resonant antenna 101 employs an integrally formed metal back plate 10111 and a metal frame 10112, the metal back plate 10111 and the metal frame 10112 surround with a metal sheet 1012 to form a non-closed cavity, and the non-closed cavity effectively realizes that the first resonant antenna 101 performs signal transceiving in a first working frequency band and a second working frequency band. The second resonant antenna 102 includes a radiation unit 1021 and a coupling unit 1022, so that signal transceiving is performed in an operating frequency band when the housing is completely metal. The first resonant antenna 101 and the second resonant antenna 102 respectively work in different working frequency bands, so that GPS and WIFI communication are respectively realized.

Therefore, the antenna device 10 or the housing of the mobile communication device 1 does not need to be added with a non-metal part, so that the signal receiving and transmitting are not interfered, the housing is completely metalized, the attractiveness and the structural strength are improved, the processing technology is simplified, and the cost is reduced. First resonant antenna 101 and second resonant antenna 102 work in coordination, and the functions of GPS and WIFI communication are flexibly and efficiently achieved.

The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by using equivalent substitutions or equivalent transformations fall within the scope of the present invention.

Claims

1. An antenna device, comprising:

a first resonant antenna and a second resonant antenna;

the first resonant antenna comprises

The metal shell comprises a metal back plate and a metal frame which are integrally formed, and the metal frame surrounds the metal back plate; and

the metal sheet and the metal shell are encircled to form a non-closed cavity, and at least one opening part and at least one gap are formed between the periphery of the metal sheet and the metal shell;

the second resonance antenna is located at the opening portion, and the second resonance antenna includes

A radiating element connected with the metal housing; and

a coupling unit coupling-feeding the radiation unit;

the coupling unit comprises a feed end connected with the feed unit, so that excitation current is obtained through the feed unit to excite the first resonant antenna to resonate.

2. The antenna device according to claim 1, wherein the outer periphery of the metal sheet has four sides adjacent to the metal case, one of the four sides forming the opening portion with the metal case, and at least one of the remaining three sides forming the gap with the metal case.

3. The antenna device according to claim 2, wherein a gap is formed between each of the remaining three sides and the adjacent partial metal frame.

4. The antenna device according to any of claims 1 to 3, characterized in that the coupling element comprises a first strip conductor and a second strip conductor connected;

the first end of the first strip lead is connected with the first end of the second strip lead, the second strip lead is coupled with the metal shell, and the first strip lead comprises a feed-in end.

5. The antenna device according to claim 4, wherein the radiating element includes a third strip conductor, a fourth strip conductor, and a fifth strip conductor connected, a first end of the fifth strip conductor is connected to a second end of the third strip conductor, a second end of the fifth strip conductor is connected to the metal case, and the third strip conductor, the fourth strip conductor, and the fifth strip conductor form a U-shape.

6. The antenna device according to claim 1, wherein the second resonance antenna further comprises an insulating substrate provided in the opening portion, the insulating substrate carrying the radiation element and the coupling element.

7. A mobile communication device, characterized by comprising an antenna arrangement and a circuit board;

the antenna device includes:

a first resonant antenna and a second resonant antenna;

the first resonant antenna comprises a metal shell, the metal shell comprises a metal back plate and a metal frame which are integrally formed, and the metal frame surrounds the metal back plate; and

the second resonant antenna is positioned at the opening part and comprises a radiation unit, and the radiation unit is connected with the metal shell; and

a coupling unit coupling-feeding the radiation unit;

the circuit board is connected with the coupling unit through a feed unit;

8. The mobile communication device of claim 7, wherein the outer periphery of the metal sheet has four sides adjacent to the metal case, wherein one side forms the opening portion with the metal case, and at least one of the remaining three sides forms the gap with the metal case.

9. The mobile communication device as claimed in claim 8, wherein a gap is formed between each of the three remaining sides and the adjacent partial metal shell, and the opening part and the gap are communicated with each other.

10. The mobile communication device of any of claims 7 to 9,

the coupling unit comprises a first strip conductor and a second strip conductor which are connected;

11. The mobile communication device of any of claims 7 to 9,

the radiating element is composed of a strip conductor,

the length of the strip conductor of the radiating element is equal to 1/4 of the wavelength of the working frequency band of the second resonant antenna.

12. The mobile communication device of claim 11, wherein the radiating element comprises a third strip conductor, a fourth strip conductor, and a fifth strip conductor connected, a first end of the fifth strip conductor is connected to a second end of the third strip conductor, a second end of the fifth strip conductor is connected to the metal housing, and the third strip conductor, the fourth strip conductor, and the fifth strip conductor form a U-shape.

13. The mobile communication device of claim 7, wherein the first and second resonant antennas operate at different frequency bands.

14. The mobile communication device of claim 13, wherein the operating frequency band of the first resonant antenna is a GPS signal frequency band, and the operating frequency band of the second resonant antenna is a WIFI signal frequency band at the first frequency.

15. The mobile communication device of claim 13, wherein the operating frequency band of the first resonant antenna is a WIFI signal frequency band at a first frequency, and the operating frequency band of the second resonant antenna is a GPS signal frequency band.

16. The mobile communication device of claim 13, wherein the operating frequency band of the first resonant antenna further comprises a WIFI signal frequency band of a second frequency.

17. The mobile communication device of claim 10, wherein a length from the feed end to the second end of the first strip conductor is configured as a third resonant antenna, a length from the feed end to the second end of the first strip conductor is equal to 1/4 of a WIFI signal band wavelength of a second frequency, and an operating band of the third resonant antenna is a WIFI signal band of the second frequency.

18. The mobile communication device according to claim 7, wherein the second resonance antenna further comprises an insulating substrate provided at the opening portion, the insulating substrate carrying the radiation element and the coupling element.

19. The mobile communication device of claim 7, further comprising a display device disposed on a side of the metal sheet opposite the metal back plate.

20. The mobile communication device of claim 7, further comprising:

the signal transceiver is electrically connected with the circuit board and used for outputting power so that the feeding unit feeds power to the antenna device and receives signals received by the antenna device.