TWI487199B - Dual-band antenna, mimo antenna device and dual-band wireless communication device - Google Patents

Description

Dual frequency antenna, MIMO antenna device and dual frequency wireless communication device

The present invention relates to the field of communications, and in particular, to a dual-band antenna, a MIMO (Multiple-Input Multiple-Out-put) antenna device, and a 2.4 GHz/5.8 GHz dual-band wireless communication device.

With the rapid development of semiconductor manufacturing, higher and higher requirements have been placed on the integration of electronic systems today, and the miniaturization of devices has become a technical issue of great concern to the entire industry. However, unlike IC chips that follow the development of Moore's Law, RF modules, another important component of electronic systems, face the difficult technical challenges of miniaturization of devices. The RF module mainly includes main components such as mixing, power amplifier, filtering, RF signal transmission, matching network and antenna. Among them, the antenna acts as the radiating unit and receiving device of the final RF signal, and its working characteristics will directly affect the working performance of the entire electronic system. However, important dimensions such as antenna size, bandwidth, and gain are limited by basic physical principles (gain limit, bandwidth limit, etc. at fixed size). The basic principle of the limits of these indicators makes the antenna miniaturization technology far more difficult than other devices, and due to the complexity of the electromagnetic field analysis of RF devices, approaching these limits has become a huge technical challenge. For example, the traditional terminal communication antenna is mainly designed based on the radiation principle of electric monopole or dipole, and the most commonly used planar anti-F antenna (PIFA). The radiated operating frequency of a conventional antenna is directly related to the size of the antenna, and the bandwidth is positively correlated with the area of the antenna, so that the design of the antenna usually requires a physical length of half a wavelength.

In addition, the antenna built-in requirements of various wireless electronic devices are becoming more and more intense. For example, various electronic devices such as wireless access points (APs) and wireless routers basically use external antennas, which greatly limits the industrial design and mechanism design of the products, and the external antennas also need to be designed with adaptive impedance matching connectors and Institutional modules, these connectors and mechanism modules account for almost 90% of the cost of the entire antenna, so the overall cost of the antenna increases the cost of electronic devices such as wireless access points (APs) and wireless routers. The built-in approach will greatly reduce the cost of connectors and mechanism modules.

In some more complex electronic systems, where the antenna requires multimode operation, additional impedance matching network design is required before feeding the antenna. However, the impedance matching network additionally increases the feeder design of the electronic system, increases the area of the RF system, and introduces a lot of energy loss in the matching network, which is difficult to meet the system design requirements of low power consumption. Therefore, miniaturization, multi-mode and antenna built-in antenna technology have become an urgent problem to be solved in contemporary electronic integrated systems.

The technical problem to be solved by the present invention is that the conventional antenna technology is difficult to implement under the premise that the size of the wireless device is limited, and the above-mentioned technical design requirements of the conventional communication system are difficult to meet the low power consumption of the modern communication system, and the present invention provides a breakthrough in the tradition. The frame of the antenna design eliminates the complicated design of the impedance matching network, ensures its miniaturization, and enables it to be applied to a wireless device with a limited size antenna, and a double antenna with high radiation area utilization and strong anti-interference ability. Frequency antenna, MIMO antenna device and 2.4GHz/5.8GHz dual-band wireless communication device.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a dual-frequency antenna, which includes a feeding point and is connected to the feeding point. The feed line and a metal structure are coupled to the metal structure, and the metal structure resonates at least two electromagnetic waves of different wavelength bands.

The frequency ranges of the electromagnetic waves of the two different bands are 2.4 GHz - 2.49 GHz and 4.9 GHz - 5.9 GHz.

The dual-frequency antenna further includes a grounding unit, and the grounding unit is provided with a plurality of metalized through holes.

The grounding unit symmetrically distributes both sides of the feeding point.

The dual-frequency antenna further includes a dielectric substrate, and the feeding point, the grounding unit, the feeding line, and a metal structure are disposed on a surface of the dielectric substrate.

The dielectric substrate is made of a ceramic material, a polymer material, a ferroelectric material, a ferrite material or a ferromagnetic material.

The polymer material is any one of FR-4 and F4B.

Wherein, the surface of the dual-frequency antenna is provided with a non-metallic anti-oxidation film.

Wherein, the metal structure is a flat plate shape.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a MIMO antenna apparatus including two antenna elements, a MIMO modulation and demodulation circuit, and a switching unit, and the MIMO modulation and demodulation circuit passes the switching unit Receiving an electrical signal of the antenna element and transmitting an electrical signal to the antenna element. Each of the antenna elements includes a feed point, a feed line connected to the feed point, and a metal structure. The feed line is coupled to the metal structure; the metal structure resonates at least two different wavelengths of electromagnetic waves.

The resonant frequency band of each antenna element is 2.4 GHz - 2.49 GHz and 4.9 G - 5.9 GHz.

Wherein, the metal structure is a complementary metal structure.

Wherein, the two antenna elements have the same metal structure or a pair of complementary metal structures.

The two antenna elements are disposed independently of each other on the dielectric substrate.

Each of the antenna elements further includes a grounding unit, and the grounding unit symmetrically distributes two sides of the feeding point, and the grounding unit is provided with a plurality of metalized through holes.

The through hole on the dielectric substrate, the feed line, the metal structure, and the vacant portion other than the ground unit are provided with perforations.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a 2.4 GHz/5.8 GHz dual-band wireless communication device, which includes a dual-frequency antenna unit, and the dual-frequency antenna unit includes a feed. An electrical point, a feed line connected to the feed point, and a metal structure; the feed line and the metal structure are coupled to each other; the metal structure resonates at least two electromagnetic waves of different wavelength bands.

The resonant frequency of the dual-frequency antenna unit is 2.4 GHz and 5.8 GHz.

Wherein, the metal structure is a complementary metal structure.

The antenna device further includes a grounding unit, and the grounding unit symmetrically distributes two sides of the feeding point, and the grounding unit is provided with a plurality of metalized through holes.

The beneficial effects of the present invention are: different from the case of the prior art, the artificial electromagnetic material theory of the present invention is used to design a metal structure that resonates at least two electromagnetic waves of different wavelength bands, and selects an impedance matching metal according to the application of the wireless electronic product. Structure; since the physical dimensions of these metal structure dimensions are not limited by the physical length of the half wavelength; the metal structure is signal coupled with the feed line to form the dual frequency antenna of the present invention. The dual-frequency antenna can simultaneously receive and transmit electromagnetic waves of at least two different bands, and can simultaneously satisfy multi-band multi-mode operation; The multi-mode operation of wireless communication electronic devices on the market requires multiple antennas. In addition, the metal structure is designed not to be limited by the physical length of the half-wavelength and the antenna is built in. Therefore, the antenna of the corresponding size can be designed according to the size of the electronic device to meet the miniaturization requirements of the electronic device.

The present invention will be further described below in conjunction with the drawings and specific embodiments: The antenna of the present invention is designed based on artificial electromagnetic material technology, which refers to a topological metal structure in which a metal sheet is etched into a specific shape, and the topological metal structure of the specific shape is set to a certain dielectric constant and permeability. The equivalent special electromagnetic material processed and manufactured on the substrate, whose performance parameters mainly depend on the topological metal structure of the specific shape of its sub-wavelength.

Specifically, as shown in FIG. 1 , it is a schematic structural diagram of a dual-frequency antenna according to a first embodiment of the present invention. The dual frequency antenna 110 of the present invention includes a feed point 15, a feed line 14 connected to the feed point 15, and a planar plate-like metal structure 16. The feed line 14 and the metal structure 16 are coupled to each other.

Among them, the metal structure 16 is designed by using the artificial electromagnetic material technology described above. Especially in the resonant frequency band of metal structures, artificial electromagnetic materials usually exhibit high dispersion characteristics. In other words, the impedance, capacitance, equivalent dielectric constant and magnetic permeability of the metal structure change drastically with frequency. Therefore, the basic characteristics of the metal structure can be designed based on the artificial electromagnetic material design method, so that the metal structure and the attached dielectric substrate as a whole, that is, the metamaterial antenna in the present application equivalently constitutes a highly dispersed special electromagnetic material. In order to achieve an antenna with rich radiation characteristics.

In the present embodiment, the metal structure 16 is an axisymmetric planar plate-like metal structure. The metal structure 16 is made of copper or silver material. It is preferably copper, which is inexpensive and has good electrical conductivity. To achieve better impedance matching, the metal structure 16 is also a combination of copper and silver.

The dual frequency antenna 110 further includes a grounding unit 18 on which a plurality of metallized through holes 181 are disposed. In the present embodiment, the grounding unit 18 symmetrically distributes both sides of the feeding point 15.

In this embodiment, the characteristics of the artificial electromagnetic material are used, and the metal structure is etched into a metal structure, so that the metal structure and the medium to which the metal structure is attached constitute an electromagnetic equivalent of a dispersion model of the Lorentz material resonance model. Materials to design antennas with multiple resonant bands.

In the present embodiment, as shown in FIG. 1, the metal structure 16 and the attached dielectric substrate form a metamaterial antenna to resonate electromagnetic waves in the two frequency bands of 2.4 GHz - 2.49 GHz and 4.9 GHz - 5.9 GHz, and the length and width of the metal structure 16 can be Make any adjustments according to the layout of the electronic equipment (as shown in Figure 7). Moreover, adjusting the length and width of the metal structure 16 and the line width between the metal structures can make the resonant frequency band of the metamaterial antenna slightly offset. For example, the electromagnetic resonance of the metamaterial antenna can be two frequency bands: 2.4 GHz - 2.49 GHz. And 5.72GHz-5.85GHz.

Referring to FIG. 2, the dual-band antenna 110 further includes a dielectric substrate 17. The feeding point 15, the grounding unit 18, the feeding line 14, and a metal structure 16 are disposed on a surface of the dielectric substrate 17. The feeding line 14 is coupled to the metal by coupling. Structure 16. The dielectric substrate 17 may be a dielectric substrate of air, ceramic or insulating function. In the present invention, the dielectric substrate 17 is made of a ceramic material, a polymer material, a ferroelectric material, a ferrite material, or a ferromagnetic material. Preferably, it is made of a polymer material, specifically The ground may be a polymer material such as FR-4 or F4B.

Referring to FIG. 3, FIG. 4 and FIG. 5 together, the signal feeding manner between the feed line 14 and the metal structure 16 can be implemented in various ways. As shown in FIG. 3, the feed line 14 is directly connected to the metal structure 16; and the position of the connection point of the feed line 14 and the metal structure 16 may be located at any position on the metal structure 16. As shown in FIGS. 4 and 5, the feed line 14 is disposed in a surrounding manner with the periphery of the metal structure 16 and the end of the feed line 14 is disposed at any position on the periphery of the metal structure 16.

Referring to FIG. 6, according to the artificial electromagnetic material design theory, a metal structure 16a complementary to the metal structure 16 of the dual-frequency antenna 110 has a resonance frequency of 2.4 GHz and 5.8 GHz. Therefore, based on this, the metal structure 16a can be included in a dual-frequency antenna including 2.4 GHz and 5.8 GHz at the resonance frequency.

In the present embodiment, regarding the manufacturing of the dual-frequency antenna 110, various manufacturing methods can be employed as long as the design principle of the present invention is satisfied. The most common method is to use a variety of printed circuit board (PCB) manufacturing methods, such as copper-clad PCB manufacturing to meet the processing requirements of the present invention. Alternatively, the shape metal structure 16, the feed line 14, and the feed point 15 described above may be printed on the FPC board.

In addition to this processing method, other processing means can be introduced according to actual needs, such as processing method of conductive silver paste ink, flexible PCB processing of various deformable devices, processing method of iron piece antenna, and processing method of combination of iron piece and PCB. Among them, the combination of iron sheet and PCB processing means that the precise processing of the PCB is used to complete the processing of the microstructure part of the wafer, and the iron piece is used to complete other auxiliary parts. Since the metal structure 16 is formed using a low-cost copper material, the exposed air is easily oxidized, so that the resonant frequency of the dual-frequency antenna 110 is shifted or the performance is urgent. The drama drops, so the non-metallic anti-oxidation film is placed on the surface of the dual-frequency antenna. Since the primary performance of the present invention is concentrated on the topology of the metal structure 16 and the design of the wafer portion, the leads of the feed line 14 have a relatively small effect on the radiation frequency of the dual frequency antenna 110. Based on this feature, the dual-band antenna can be flexibly placed anywhere in the system, simplifying the complexity of the installation test.

The dual-band antenna 110 can directly apply a wireless communication device including 2.4 GHz and 5.8 GHz, and the dual-band antenna 110 can be directly disposed on the PCB of the wireless communication device, or the interface can be used to enable the dual-frequency antenna 110 to communicate with the wireless communication through an interface. The PCB boards of the device are connected.

Referring to FIG. 8, the MIMO antenna device includes at least two antenna units 210, a switching unit 219, and a MIMO modulation and demodulation circuit 218. Each antenna unit 210 is a dual-frequency antenna 110 as described above, and its feeding point extends outward as a pin, and each antenna unit 210 is connected to the switching unit 219 through a pin one by one; the MIMO modulation and demodulation circuit 218 is switched. Unit 219 receives the electrical signals of at least two antenna elements 210 and transmits electrical signals to at least two antenna elements 210.

Referring to FIG. 9, a schematic structural view of a specific embodiment of two antenna elements is shown. The antenna element 212 includes a dielectric substrate 27 and two antenna units 210 disposed on a surface of the dielectric substrate 27. The two antenna units 210 are disposed independently of each other on the dielectric substrate 27.

The antenna unit 210 includes a feed unit 25, a ground unit 28 disposed on both sides of the feed unit 25, a feed line 24 connected to the feed unit 25, and a metal structure 26. The feed line 24 and the metal structure 26 are electrically coupled to each other; the metal structure 26 is also designed by the above-mentioned artificial electromagnetic material. In the embodiment, the metal structure 26 is an axisymmetric metal structure pattern, and the corresponding two harmonics The vibration frequency bands are 2.4 GHz - 2.49 GHz and 4.9 G - 5.9 GHz. The metal structure 26 is made of copper or silver material.

In the embodiment, in order to reduce the mutual interference of the two antenna units 210 during operation, the lengths of the feed lines 24 of the two antenna units 210 are not equal, so that the two antenna units 210 are arranged in a misaligned manner so that the two antenna units maintain signals on the dielectric substrate 27. Maximum isolation. The feed line 24 of the portion of the ground unit 28 is slightly wider than the other portion of the feed line 24, and one end of the feed line 24 is provided for receiving the electrical signal feed unit 25. In the present embodiment, the feeding unit 25 is a copper clad wire.

The ground unit 28 sets the width and length according to the feed line 24. In the present embodiment, since the two antenna elements 210 are arranged in a misaligned manner, the two antenna elements 210 correspond to the shape of the grounding unit.

Please refer to FIG. 10, which is a structural diagram of another embodiment of an antenna element. A metalized through hole 281 may be disposed on the grounding unit 28 of each antenna unit 210.

Please refer to FIG. 11, which is a schematic structural view of a preferred embodiment of the antenna element 21. The vacant portion of the dielectric substrate 27 is disposed on the perforations 282 for the purpose of reducing the weight of the product and facilitating heat dissipation in conjunction with the electronic device for its application.

Please refer to FIG. 12, which is a structural diagram of a pair of complementary antenna elements for the antenna element. Two metal structures 26 and a complementary metal structure 26a are disposed on the same dielectric substrate 27 to form an antenna element.

Of course, as shown in FIG. 13, the antenna element of the present invention can also be formed by disposing a metal structure having the same shape and complementary to the metal structure 26 in FIG. 11 on the same dielectric substrate.

In the above embodiment, the antenna unit 210 of the present invention is formed by attaching the metal structure 26 or the metal structure 26a complementary to the metal structure 26 and the feed line 24 and the feed unit 25 to the dielectric substrate 27. In this embodiment, two identical metal structures 26a and corresponding feed lines 24 and feed units 25 are disposed on the same dielectric substrate 27, that is, two antenna units 210 are disposed on the same dielectric substrate 27 to form an antenna. Element 212. The antenna element 212 can be plugged into a wireless communication device including two resonant frequency bands (eg, 2.4 GHz - 2.49 GHz and 4.9 G - 5.9 GHz). The metal structure 26 and the feed line 24 may be the same or different, and the feed mode is modified according to the test best effect of the last MIMO antenna device. In the present embodiment, the metal structure 26 and the feed line 24 are both indirectly electrically connected, that is, the electrical signal is inductively capacitively fed.

Please refer to FIG. 14, which is a schematic diagram of a 2.4 GHz/5.8 GHz dual frequency wireless communication device of the present invention. The 2.4 GHz/5.8 GHz dual-band wireless communication device 300 includes a body 301 and a dual-frequency antenna unit 310 built in the body 301. The dual-frequency antenna unit 310 can receive electromagnetic waves in two frequency bands of 2.4 GHz-2.49 GHz and 4.9 GHz-5.9 GHz, and the resonance frequency is preferably 2.4 GHz and 5.8 GHz, so that the 2.4 GHz/5.8 GHz dual-band wireless communication device 100 is simultaneously performed. Dual band communication. Of course, in order to improve the wireless signal receiving performance, the dual-frequency antenna unit 310 may be externally disposed on the body 301.

2.4GHz/5.8GHz dual-band wireless communication devices include, but are not limited to, wireless access points (APs), set-top boxes, wireless data cards, wireless routers, mobile phones, personal digital assistants, navigation devices, Bluetooth devices, and WIFI wireless base stations. 2.4GHz and 5.8GHz wireless electronic devices. Wherein, the dual frequency antenna unit 310 It may be a dual band antenna or antenna element as mentioned in the above embodiments.

In the above manner, the present invention uses artificial electromagnetic material technology to design a library of related electromagnetic wave resonance response metal structures, which are smaller in size than conventional antenna structures, so that the physical size of the antenna is not limited by the physical length of the half wavelength; After the impedance-matched metal structure is continuously screened, tested and adjusted, the metal structure suitable for the dual-frequency antenna is finally optimized, so that the selected metal structure resonates at least two electromagnetic waves of different wavelengths, satisfying the requirements of the wireless electronic device. The need for miniaturization, antenna built-in and multi-mode work.

Although the invention has been disclosed above by way of preferred embodiments, it is not intended to limit the invention. Those skilled in the art will be able to make some modifications and variations without departing from the spirit and scope of the invention. Accordingly, the scope of the invention is intended to fall within the scope of the appended claims.

14‧‧‧ feeder

15‧‧‧Feeding point

16‧‧‧Metal structure

16a‧‧‧Metal structure

17‧‧‧Media substrate

18‧‧‧ Grounding unit

24‧‧‧ feeder

25‧‧‧Feeding unit

26‧‧‧Metal structure

26a‧‧‧Metal structure

27‧‧‧Media substrate

28‧‧‧ Grounding unit

110‧‧‧Double frequency antenna

181‧‧‧through hole

210‧‧‧Antenna unit

212‧‧‧Antenna components

218‧‧‧MIMO modulation and demodulation circuit

219‧‧‧Switch unit

281‧‧‧through hole

282‧‧‧Perforation

300‧‧‧2.4GHz/5.8GHz dual-band wireless communication device

301‧‧‧ Ontology

310‧‧‧Double frequency antenna unit

1 is a plan view of a dual-frequency antenna according to a first embodiment of the present invention; FIG. 2 is a structural view of the dual-frequency antenna shown in FIG. 1 attached to a dielectric substrate; FIG. 3 is a dual-frequency antenna according to a second embodiment of the present invention; FIG. 4 is a plan view showing a feeding structure of a metal structure and a feeder of a dual-frequency antenna according to a third embodiment of the present invention; FIG. 5 is a plan view showing a feeding structure of a dual-frequency antenna according to a third embodiment of the present invention; A planar structure diagram of a metal structure of a dual-frequency antenna and a feed mode of the feeder; FIG. 6 is a plan view of a dual-frequency antenna of a complementary metal structure of the dual-frequency antenna shown in FIG. 7 is a partial plan view of a dual-frequency antenna according to a fifth embodiment of the present invention; FIG. 8 is a schematic diagram of a MIMO antenna device module according to a sixth embodiment of the present invention; and FIG. 9 is a specific embodiment of the antenna element shown in FIG. FIG. 10 is a schematic structural view of another embodiment of the antenna element shown in FIG. 8; FIG. 11 is a schematic structural view of the third embodiment of the antenna element shown in FIG. 8; FIG. 13 is a structural diagram of an antenna element of the present invention comprising two complementary antenna elements; and FIG. 14 is a schematic diagram of a 2.4 GHz/5.8 GHz dual-band wireless communication device of the present invention.

14‧‧‧ feeder

15‧‧‧Feeding point

16‧‧‧Metal structure

17‧‧‧Media substrate

18‧‧‧ Grounding unit

110‧‧‧Double frequency antenna

Claims (17)

A dual frequency antenna, wherein the dual frequency antenna comprises a feeding point, a feeding line connected to the feeding point, and a metal structure, wherein the metal structure comprises a first metal piece and a second piece disposed on the same plane a metal piece and a metal frame, wherein the first metal piece and the second metal piece are rectangular, and are disposed in the metal frame which is rectangular in shape, and a common wire is disposed in the metal frame, and the common wire is One end of the common wire is connected to the upper side of the metal frame, and the other end of the common wire is spaced apart from the lower side of the metal frame by a predetermined distance. A first wire is drawn from the upper right corner of the first metal piece, and the first wire is wound around the first metal piece. The upper side, the left side and the lower side of a metal piece are extended and connected to the other end of the common wire, and a second wire is drawn from the upper left corner of the second metal piece and around the upper side and the right side of the second metal piece, and The lower side is extended and connected to the other end of the common wire; the feed line is coupled to the metal structure; the dual frequency antenna resonates at least two electromagnetic waves of different wavelength bands. The dual-frequency antenna according to claim 1, wherein the frequency bands of the electromagnetic waves of the two different bands are 2.4 GHz - 2.49 GHz and 4.9 GHz - 5.9 GHz. The dual-frequency antenna according to claim 1, wherein the dual-frequency antenna further includes a grounding unit, and the grounding unit is provided with a plurality of metalized through holes. The dual-frequency antenna according to claim 3, wherein the grounding unit symmetrically distributes both sides of the feeding point. The dual-frequency antenna according to claim 3, wherein the dual-frequency antenna further includes a dielectric substrate, the feeding point, the grounding unit, The feed line and the metal structure are both disposed on a surface of the dielectric substrate. The dual-frequency antenna according to claim 5, wherein the dielectric substrate is made of a ceramic material, a polymer material, a ferroelectric material, a ferrite material or a ferromagnetic material. The dual-frequency antenna according to claim 6, wherein the polymer material is any one of FR-4 and F4B. The dual-frequency antenna according to claim 1, wherein the dual-frequency antenna is provided with a non-metallic anti-oxidation film on its surface. The dual-frequency antenna according to claim 1, wherein the metal structure is a flat plate shape. A MIMO antenna apparatus, wherein the MIMO antenna apparatus includes two antenna elements, a MIMO modulation and demodulation circuit, and a switching unit, and the MIMO modulation and demodulation circuit receives an electrical signal of the antenna element and transmits an electrical signal through the switching unit Giving the antenna element; wherein each of the antenna elements includes a feed point, a feed line connected to the feed point, and a metal structure, the metal structure including a first metal piece disposed on a same plane, a second metal piece and a metal frame, wherein the first metal piece and the second metal piece are rectangular, and are disposed in the same metal frame, wherein the metal frame is provided with a common wire, One end of the common wire is connected to the upper edge of the metal frame, and the other end of the common wire is spaced apart from the lower side of the metal frame by a predetermined distance, and a first wire is taken out from the upper right corner of the first metal piece, and is wound around The upper side, the left side and the lower side of the first metal piece are extended and connected to the other end of the common wire, a second wire is drawn from the upper left corner of the second metal piece, and the second gold is wound around The upper side, the right side and the lower side of the zoning piece are extended and connected to the other end of the common wire; The feed line is coupled to the metal structure; the dual frequency antenna resonates at least two different wavelengths of electromagnetic waves. The MIMO antenna device according to claim 10, wherein the resonant frequency band of each of the antenna elements is 2.4 GHz - 2.49 GHz and 4.9 G - 5.9 GHz. The MIMO antenna device according to claim 10, wherein the two antenna elements are disposed independently of each other on the dielectric substrate. The MIMO antenna device according to claim 12, wherein each of the antenna elements further includes a grounding unit, the grounding unit symmetrically distributing both sides of the feeding point, and the grounding unit is provided with a plurality of Metallized through holes. The MIMO antenna device according to claim 13, wherein the feed point on the dielectric substrate, the feed line, the metal structure, and a spare portion other than the ground unit are disposed There are perforations. A dual-band wireless communication device, wherein the dual-band wireless communication device comprises a dual-frequency antenna unit, the dual-frequency antenna unit includes a feeding point, a feeding line connected to the feeding point, and a metal structure. The metal structure includes a first metal piece, a second metal piece, and a metal frame disposed on the same plane, the first metal piece and the second metal piece being rectangular, and both are disposed on the same rectangular metal a common wire is disposed in the metal frame, and one end of the common wire is connected to an upper edge of the metal frame, and the other end of the common wire is spaced apart from a lower side of the metal frame by a predetermined distance, a first wire Leading from the upper right corner of the first metal piece, and extending around the upper, left and lower sides of the first metal piece and then connected to the other end of the common wire, a second wire from the second metal The upper left corner of the sheet is drawn and extends around the upper, right and lower sides of the second metal sheet and is connected to the other end of the common conductor; the feed line is coupled to the metal structure; the dual frequency antenna at least Two different bands of electromagnetic waves resonate. The dual-band wireless communication device according to claim 15, wherein the dual-frequency antenna unit has a resonance frequency of 2.4 GHz and 5.8 GHz. The dual-band wireless communication device according to claim 15, wherein the antenna device further includes a grounding unit, the grounding unit symmetrically distributes two sides of the feeding point, and the grounding unit is provided with a plurality of Metallized through holes.