WO2013040825A1

WO2013040825A1 - High-gain metamaterial antenna, wireless access device, and router

Info

Publication number: WO2013040825A1
Application number: PCT/CN2011/081897
Authority: WO
Inventors: 刘若鹏; 徐冠雄; 李岳峰
Original assignee: 深圳光启高等理工研究院; 深圳光启创新技术有限公司
Priority date: 2011-09-23
Filing date: 2011-11-08
Publication date: 2013-03-28

Abstract

Disclosed are a high-gain metamaterial antenna, a wireless access device, and a router. The high-gain metamaterial antenna of the present invention comprises a dielectric substrate, a metal structure, a feeder cable, and a ground reference. The metal structure, the feeder cable, and the ground reference are all arranged on the dielectric substrate, where the feeder cable and the metal structure are coupled to each other. The ground reference comprises a first ground reference unit and a second ground reference unit respectively arranged on two opposite surfaces of the dielectric substrate. The first ground reference unit allows one end of the feeder cable to form a microstrip cable. The high-gain metamaterial antenna, the wireless access device, and the router of the present invention acquire a required equivalent dielectric constant and magnetic permeability distribution by controlling precisely the topological morphology of the antenna metal structure and by distributing rationally the microstrip cable, thus allowing for the antenna the implementation of improved impedance matching within an operating frequency band, completion with increased efficiency of energy conversion, acquisition of an ideal radiation pattern, a high-gain, and implementation of the miniaturization of the antenna under the premise of meeting communication device performance requirement.

Description

High gain metamaterial antenna, wireless access device and router

[Technical Field]

The present invention relates to the field of communications technologies, and in particular, to a high gain metamaterial antenna, a wireless access device, and a router.

【Background technique】

With the rapid development of semiconductor technology, higher and higher requirements are put forward for the integration of electronic systems today, and the miniaturization of devices has become a technical issue of great concern to the entire industry. As an important part of the electronic system, the RF module faces the difficult technical challenge of miniaturization of the device. The existing RF modules usually include the 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 operating characteristics will directly affect the performance of the entire electronic system.

However, the radiated operating frequency of the existing PIFA 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, and thus the volume is large, and if the volume is reduced, The required gain cannot be achieved. In some more complex electronic systems, where the antenna requires multimode operation, an additional impedance matching network needs to be added before feeding the antenna. The impedance matching network additionally increases the area of the RF system, and the matching network also introduces a lot of energy loss, which is difficult to meet the system design requirements of low power consumption.

The existing PCB antenna is usually used as a built-in antenna. It has high environmental requirements and needs to reserve a certain area of clearance area, which has an impact on the miniaturization of equipment. The metal parts on the equipment should be away from the PCB antenna, otherwise it will have a greater impact on the PCB antenna. In addition, it needs to be re-commissioned for different products, with a long development cycle and a large impact on mass stability during mass production.

Existing metamaterial antennas based on composite left and right hand transmission line technology are designed based on transmission line theory (eg, Rayspan's hypermaterial antenna in the United States). The existing metamaterials are loaded on the normal right hand transmission line to implement the left hand. The required series capacitor and shunt inductor constitute a composite transmission The metamaterial of the transmission line, the metamaterial antenna using the composite left and right hand technology must depend on the size of the motherboard, and requires a customized design, which has great limitations in its application range.

[Summary of the Invention]

The technical problem to be solved by the present invention is to provide a high-gain metamaterial antenna, a wireless access device, and a router. The high-gain metamaterial antenna, the wireless access device, and the router of the present invention have small occupation volume and low environmental requirements. Wide range, high gain, good impedance matching in the working frequency band, high energy conversion, and ideal radiation field, and can achieve miniaturization of the antenna under the premise of meeting the performance requirements of communication equipment.

In order to solve the above technical problem, one technical solution adopted by the present invention is to provide a high gain metamaterial antenna including a dielectric substrate, a metal structure, a feeder and a reference ground, a metal structure, a feeder, and a reference ground. The first reference ground unit and the second reference ground unit are disposed on the opposite surfaces of the dielectric substrate, and the first reference ground unit forms a microstrip line at one end of the feed line. .

The first reference ground unit and the second reference ground unit are electrically connected to each other.

The dielectric substrate is provided with a plurality of metallized through holes, and the first reference ground unit and the second reference ground unit are electrically connected through the metalized through holes.

The first reference ground unit is provided with a first metal surface unit and a second metal surface unit electrically connected to each other, and the first metal surface unit is opposite to one end of the feeding line, so that one end of the feeding line forms a microstrip line; the second reference ground The unit is provided with a third metal surface unit, and the third metal surface unit is opposite to the second metal surface unit.

Wherein, the dielectric substrate is located at the second metal surface unit and the third metal surface unit, and a plurality of metallized through holes are formed, and the second metal surface unit and the third metal surface unit are electrically connected through the metalized through holes.

Wherein, the third metal surface unit is located at one end of the metal structure, and the third metal surface unit has a long aspect plate shape and is the same as the extension direction of the feed line.

Wherein, the second reference ground unit further includes a fourth metal surface unit, and the fourth metal surface unit is located at the feeding line One side of one end, and is located in the direction in which the feeder extends.

Wherein, the dielectric substrate is located at the first metal surface unit and the fourth metal surface unit, and a plurality of metallized through holes are opened, and the first metal surface unit and the fourth metal surface unit are electrically connected through the metalized through holes.

The metal structure is a complementary open resonant ring structure, a complementary spiral structure, an open spiral ring structure, a double-open spiral ring structure, a complementary bent line structure, a derivative structure of a complementary open resonant ring structure, and a complementary open resonant ring. Any of the structures of the composite structure of the structure and the structure of the complementary open resonant ring structure array.

Wherein, the metal structure is provided with a frame body and two spiral wires located in the frame body, and the two spiral wires are connected to each other to form an open spiral ring, and the open spiral ring is connected with the frame body, and the free end of the spiral wire has a panel shape.

In order to solve the above technical problem, another technical solution adopted by the present invention is: providing a wireless access device, including a wireless access device body and being installed on a wireless access device body and performing signals thereon The antenna, the antenna includes a dielectric substrate, a metal structure, a feed line and a reference ground, the metal structure, the feed line and the reference ground are all disposed on the dielectric substrate, and the feed line and the metal structure are coupled to each other, and the reference ground comprises the first surface on the opposite surfaces of the dielectric substrate A reference ground unit and a second reference ground unit, the first reference ground unit forming one end of the feed line to form a microstrip line.

The first reference ground unit and the second reference ground unit are electrically connected to each other, and the dielectric substrate is provided with a plurality of metallized through holes, and the first reference ground unit and the second reference ground unit are electrically connected by the metalized through holes.

The first reference ground unit is provided with a first metal surface unit and a second metal surface unit electrically connected to each other, and the first metal surface unit is opposite to one end of the feeding line, so that one end of the feeding line forms a microstrip line; the second reference ground The unit is provided with a third metal surface unit, the third metal surface unit is opposite to the second metal surface unit, and the dielectric substrate is located at the second metal surface unit and the third metal surface unit, and the first metallized through hole is opened, and the second The metal face unit and the third metal face unit are electrically connected through the first metallized through hole.

The third metal surface unit is located at one end of the metal structure, the third metal surface unit has a long plate shape and is the same as the extension direction of the feed line, and the second reference ground unit further includes a fourth metal surface unit, and the fourth metal surface unit The first metal surface is located at one end of the feeding line and is located in the extending direction of the feeding line. The first metal surface unit and the fourth metal surface unit are respectively provided with a plurality of second metallized through holes. The element and the fourth metal face unit are electrically connected through the second metallized through hole.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a router including a router main body and an antenna mounted on the main body of the router for signal transmission, and the antenna includes a dielectric substrate, a metal structure, The feed line and the reference ground are respectively disposed on the dielectric substrate, the feed line and the metal structure are coupled to each other, and the reference ground includes a first reference ground unit and a second reference ground unit on opposite surfaces of the dielectric substrate, A reference ground unit causes one end of the feed line to form a microstrip line.

The third metal surface unit is located at one end of the metal structure, the third metal surface unit has a long plate shape and is the same as the extension direction of the feed line, and the second reference ground unit further includes a fourth metal surface unit, and the fourth metal surface unit a second metallized through hole, a first metal surface unit and a fourth metal surface, the first metal surface unit and the fourth metal surface unit are located at a side of one end of the feeding line and extending in a direction of the feeding line. The cells are electrically connected through the second metallized via.

The beneficial effects of the present invention are: different from the prior art, the high-gain metamaterial antenna, the wireless access device and the router of the present invention precisely control the topology of the antenna metal structure and rationally arrange the microstrip line, Thereby obtaining the required equivalent dielectric constant and permeability distribution, so that the antenna can It achieves good impedance matching in the working frequency band, completes energy conversion with high efficiency, and obtains an ideal radiation field type with high gain, and can realize miniaturization of the antenna under the premise of meeting the performance requirements of communication equipment.

[Description of the Drawings]

Figure 1 is a front elevational view of the high gain metamaterial antenna of the present invention;

Figure 2 is a rear elevational view of the high gain metamaterial antenna of the present invention;

Figure 3 is a simulation diagram of the S parameter of the present invention shown in Figure 1;

Figure 4a is a schematic view of a complementary open resonant ring structure;

Figure 4b is a schematic view of a complementary helical structure;

Figure 4c is a schematic view showing the structure of the open spiral ring;

Figure 4d is a schematic view of a double-open spiral ring structure;

Figure 4e is a schematic view showing a complementary bending line structure;

5a is a schematic diagram showing the geometry of the complementary open resonant ring structure shown in FIG. 4a; FIG. 5b is a schematic diagram of the extended open resonant ring structure shown in FIG. 4a;

6a is a composite structural view of three complementary open resonant ring structures shown in FIG. 4a; FIG. 6b is a complementary open resonant ring structure shown in FIG. 4a and a complementary helical structure shown in FIG. 4b. Composite schematic diagram;

7 is a schematic structural view of four complementary open resonant ring structure arrays shown in FIG. 4a; FIG. 8 is a schematic structural view of a wireless access device according to the present invention;

FIG. 9 is a schematic structural diagram of a router according to the present invention.

【detailed description】

The high-gain metamaterial antenna, the wireless access device and the router of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The metamaterial antenna is designed based on artificial electromagnetic material technology, and the artificial electromagnetic material refers to a topographic metal structure in which a metal piece is stenciled into a specific shape, and the topological metal structure of the specific shape is set in one An equivalent special electromagnetic material processed by a dielectric constant and a magnetic permeability substrate, whose performance parameters are mainly determined by the topological metal structure of a specific shape of its subwavelength. In the resonant frequency band, artificial electromagnetic materials usually exhibit a high degree of dispersion characteristics. In other words, the impedance, capacitance, equivalent dielectric constant, and magnetic permeability of the antenna vary drastically with frequency. Therefore, the basic characteristics of the above antenna can be modified by using artificial electromagnetic material technology, so that the metal structure and its attached dielectric substrate equivalently constitute a highly dispersive special electromagnetic material, thereby realizing a novel antenna with rich radiation characteristics.

Referring to FIG. 1 and FIG. 2, the high gain metamaterial antenna of the present invention comprises a dielectric substrate 1, a metal structure 2, a feed line 3 and a reference ground. The dielectric substrate 1 has a rectangular plate shape, which can be made of high molecular polymer, ceramics, Made of ferroelectric materials, ferrite materials or ferromagnetic materials. In the present embodiment, the material of the dielectric substrate 1 is made of a glass fiber material (FR4), so that it is not only low in cost, but also ensures good antenna operation characteristics at different operating frequencies.

The metal structure 2, the feed line 3 and the reference ground are all disposed on the surface of the dielectric substrate 1. The metal structure 2 forms a metamaterial with the dielectric substrate 1, and the performance of the metamaterial depends on the metal structure. 2, in the resonant frequency band, the metamaterial usually exhibits a high degree of dispersion characteristics, that is, its impedance, capacitiveness, equivalent dielectric constant and magnetic permeability change drastically with frequency, and thus by changing the metal structure 2 The basic characteristics of the dielectric substrate 1 are such that the metal structure 2 and the dielectric substrate 1 are equivalently composed of a highly dispersive special electromagnetic material in accordance with the Lorentz material resonance model.

Referring to FIG. 3 to FIG. 7 , the metal structure 2 can be a complementary open resonant ring structure, a complementary spiral structure, an open spiral ring structure, a double-open spiral ring structure, a complementary bent line structure, and a complementary open resonant ring. a derivative structure of the structure, a composite structure of a complementary open resonant ring structure, a structure of a complementary open resonant ring structure, or a similar topological metal structure or metal etching pattern, the metal structure 2 There are a myriad of shapes and are not limited to the structures mentioned above. In this embodiment, the metal structure 2 is provided with a frame 21 and two spirals 22 located in the frame 21, and the two spirals 22 are connected to each other to form an open spiral ring. The frame body 21 is connected, and the free end of the spiral wire 22 has a panel shape, and the plate-shaped end portion increases the wave receiving area of the antenna. The working frequency band of this embodiment is 2.4GHZ 2.49GHZ and 5.72GHZ~5.85GHZ, the above two The gain of the frequency band can reach 3.58 dBi and 3.14 dBi, respectively. As can be seen from Fig. 3, the emission coefficient of the present invention is small. The feed line 3 is disposed on one side of the metal structure 2 and extends along the length direction of the metal structure 2, and is coupled to the metal structure 2, wherein one end of the feed line 3 is bent and extended to The end of the metal structure 2 is on one side. In addition, a capacitive electronic component can be embedded in the space between the feed line 3 and the metal structure 2 as needed, and the signal coupling between the feed line 3 and the metal structure 2 can be adjusted by embedding the capacitive electronic component by the formula: ΐ=υ ( 2π^ ), it can be seen that the magnitude of the capacitance is inversely proportional to the square of the operating frequency, so when the required operating frequency is a lower operating frequency, it can be realized by appropriately embedding capacitive electronic components. The capacitance value of the added capacitive electronic components is usually in the range of 0-2 pF, but the embedded capacitance value may exceed the range of 0-2 pF as the antenna operating frequency changes.

The reference ground is located on one side of the feed line 3 such that one end of the feed line 3 at the end of the metal structure 2 forms a microstrip line 31. In this embodiment, the reference ground includes a first reference ground unit 41 and a second reference ground unit 42. The first reference ground unit 41 and the second reference ground unit 42 are respectively located on opposite sides of the dielectric substrate 1. surface. The first reference ground unit 41 is provided with a first metal surface unit 411 and a second metal surface unit 412 which are electrically connected to each other. The second reference ground unit 42 and the feed line 3 are located on the same side of the dielectric substrate 1 and are provided with a third metal surface unit 421 and a fourth metal surface unit 422.

The first metal surface unit 411 is opposite to the feed line 3 such that an end of the feed line 3 at the end of the metal structure 2 forms the microstrip line 31, that is, the reference ground is a virtual ground. The second metal face unit 412 is positioned opposite to the third metal face unit 421. The third metal surface unit 421 is located at one end of the metal structure 2, and the third metal surface unit 421 has a long plate shape and is the same as the extending direction of the feed line 3. The plurality of metallized through holes 5 are formed in the second metal surface unit 412 and the third metal surface unit 421, and the second metal surface unit 412 and the third metal surface unit 421 Electrically connected through the metallized via 5 .

The fourth metal surface unit 422 is located at one side of the feeder 3 end and is located in the extending direction of the feed line 3. The first metal surface unit 411 and the fourth metal surface unit 422 are provided with a plurality of metallized through holes 5, and the first metal surface unit 411 and the fourth gold The face unit 422 is electrically connected through the metallized through hole 5. The microstrip line 31 is formed by the first metal surface unit 411 and one end of the feed line 3, so that interference of external signals on signals transmitted on the feeder line 3 can be reduced, antenna gain can be improved, and good impedance matching can be achieved. Save materials and low cost. The first metal surface unit 411 to the fourth metal surface unit 422 are disposed by a clever position, so that the reference ground occupies a small space, and a large area is realized. Further, by providing the metallized through hole 5, the area of the reference ground can be further increased.

The present invention also provides a wireless access device based on the high gain metamaterial antenna of the present invention. Referring to FIG. 8, the wireless access device of the present invention is a wireless access point (AP), which includes a wireless access device main body 10 and an antenna 20 mounted on the wireless access device main body 10 and transmitting signals thereto.

The wireless access device main body 10 includes a microprocessor module 11 electrically connected to the rank, a baseband processing module 12, a radio frequency processing module 13, and a front end amplification module 14, and the microprocessor module 11 is connected with a data service communication interface. Module 15 and memory 16. The wireless access device main body 10 is a prior art, and details are not described herein again.

The antenna 20 employs the high gain metamaterial antenna of the present invention, which includes a dielectric substrate, a metal structure, a feed line, and a reference ground. The technical features of the antenna 20 are specifically described with reference to the high-gain metamaterial antenna of the present invention in FIGS. 1-7, and details are not described herein again.

The present invention also provides a router based on the high gain metamaterial antenna of the present invention. Referring to 9, the router of the present invention includes a router main body 50 and an antenna 60 mounted on the router main body 50 and transmitting signals thereto.

The router main body 50 includes a power module 51, a data service communication interface 52, a data processor module 53, a memory 54, and a wireless communication module 55. The power module 51 is configured to provide power to the wireless router; the data service communication interface 52 is configured to input a data signal or transmit a data signal from the data terminal; and the data processor module 53 is configured to package the data of the received data signal. And protocol conversion, and performing network selection to route to the virtual private network VPN server; the memory 54 is configured to store data signals processed by the data processor module; the wireless communication module 55 is configured to pass the data processor module The processed data signal is transmitted to the antenna 60 for transmission. The antenna 60 is for transmitting and receiving data signals including a dielectric substrate, a metal structure, a feed line, and a reference ground. The technical features of the antenna 60 are specifically described with reference to the high-gain metamaterial antenna of the present invention in FIGS. 1-7, and details are not described herein again.

In summary, the high-gain metamaterial antenna, the wireless access device and the router of the present invention obtain the required equivalent dielectric constant by precisely controlling the topology of the antenna metal structure and rationally arranging the microstrip line. The magnetic permeability distribution enables the antenna to achieve better impedance matching in the working frequency band, complete energy conversion with high efficiency, and obtain an ideal radiation field type, high gain, and can realize the antenna under the premise of meeting the performance requirements of the communication equipment. Miniaturization.

The preferred embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive. A person skilled in the art can also make many forms without departing from the scope of the present invention and the claims. For example, a connection member is disposed between the metal structure 2 and the feeder 3. The metal structure 2 and the feed line 3 are electrically connected to each other, that is, the inductive coupling between the metal structure 2 and the feed line 3, etc., which are all within the protection scope of the present invention.

Claims

Rights request

What is claimed is: 1. A high gain metamaterial antenna, comprising: a dielectric substrate, a metal structure, a feed line, and a reference ground, wherein the metal structure, the feed line, and the reference ground are all disposed on the dielectric substrate The feed line and the metal structure are coupled to each other, the reference ground includes a first reference ground unit and a second reference ground unit on opposite surfaces of the dielectric substrate, and the first reference ground unit makes the feed line One end forms a microstrip line.

2. The high gain metamaterial antenna according to claim 1, wherein: said first reference ground unit and said second reference ground unit are electrically connected to each other.

3. The high gain metamaterial antenna according to claim 2, wherein: the dielectric substrate is provided with a plurality of metallized through holes, and the first reference ground unit and the second reference ground unit pass the metal The through holes are electrically connected.

The high-gain metamaterial antenna according to claim 1, wherein: the first reference ground unit is provided with a first metal surface unit and a second metal surface unit electrically connected to each other, the first metal surface The unit is opposite to an end of the feed line, such that one end of the feed line forms the microstrip line; the second reference ground unit is provided with a third metal surface unit, the third metal surface unit and the second The metal surface units are positioned opposite each other.

The high-gain metamaterial antenna according to claim 4, wherein: the dielectric substrate is provided with a plurality of metallized through holes at the second metal surface unit and the third metal surface unit, The second metal surface unit and the third metal surface unit are electrically connected through the metalized via.

6. The high gain metamaterial antenna according to claim 5, wherein: the third metal surface unit is located at one end of the metal structure, and the third metal surface unit has a long plate shape and The feed lines extend in the same direction.

7. The high gain metamaterial antenna according to claim 4, wherein: the second reference ground unit further comprises a fourth metal surface unit, and the fourth metal surface unit is located at one side of one end of the feed line. And located in the extending direction of the feeder.

8. The high gain metamaterial antenna according to claim 7, wherein: said dielectric substrate A plurality of metallized through holes are defined in the first metal surface unit and the fourth metal surface unit, and the first metal surface unit and the fourth metal surface unit are electrically connected through the metalized through holes.

9. The high gain metamaterial antenna according to claim 1, wherein: said metal structure is a complementary open resonant ring structure, a complementary spiral structure, an open spiral ring structure, a double open spiral ring structure, and a complementary type. Any one of a bent line structure, a derivative structure of a complementary open resonant ring structure, a composite structure of a complementary open resonant ring structure, and a structure after a complementary open resonant ring structure array.

The high-gain metamaterial antenna according to claim 1, wherein: the metal structure is provided with a frame body and two spiral wires located in the frame body, and the two spiral wires are connected to each other to form an open spiral ring. The open spiral ring is connected to the frame, and the free end of the spiral has a panel shape.

A wireless access device, comprising: a wireless access device body; and an antenna mounted on the wireless access device body and transmitting signals thereto, wherein the antenna includes a medium a substrate, a metal structure, a feed line, and a reference ground, wherein the metal structure, the feed line, and the reference ground are both disposed on the dielectric substrate, the feed line and the metal structure are coupled to each other, and the reference ground includes a relative a first reference ground unit and a second reference ground unit on the two surfaces, the first reference ground unit forming one end of the feed line to form a microstrip line.

The wireless access device according to claim 11, wherein: the first reference ground unit and the second reference ground unit are electrically connected to each other, and the dielectric substrate is provided with a plurality of metalized through holes, wherein the A reference ground unit and the second reference ground unit are electrically connected through the metallized through hole.

The wireless access device according to claim 11, wherein: the first reference ground unit is provided with a first metal surface unit and a second metal surface unit electrically connected to each other, the first metal surface unit Opposite the one end position of the feed line, one end of the feed line is formed into the microstrip line; the second reference ground unit is provided with a third metal surface unit, the third metal surface unit and the second metal The plurality of first metallized through holes are formed in the second metal surface unit and the third metal surface unit, and the second metal surface unit and the third metal surface are opposite to each other. The cells are electrically connected through the first metallized via.

14. The wireless access device of claim 13, wherein: the third metal surface The unit is located at one end of the metal structure, the third metal surface unit has a long plate shape and is the same as the extension direction of the feed line, and the second reference ground unit further includes a fourth metal surface unit, the a fourth metal surface unit is located at one end of the one end of the feeding line, and is located in an extending direction of the feeding line, and the dielectric substrate is located at the first metal surface unit and the fourth metal surface unit to open a plurality of second metal The through hole, the first metal surface unit and the fourth metal surface unit are electrically connected through the second metallized through hole.

The wireless access device according to claim 13, wherein: the metal structure is provided with a frame body and two spiral wires located in the frame body, and the two spiral wires are connected to each other to form an open spiral ring. The open spiral ring is connected to the frame, and the free end of the spiral has a panel shape.

A router, comprising: a router body and an antenna mounted on the router body and transmitting signals thereto, the antenna comprising a dielectric substrate, a metal structure, a feeder, and a reference ground, a metal structure, a feed line, and a reference ground are disposed on the dielectric substrate, the feed line and the metal structure are coupled to each other, and the reference ground includes a first reference ground unit and a second on opposite surfaces of the dielectric substrate Referring to the ground unit, the first reference ground unit causes one end of the feed line to form a microstrip line.

The router according to claim 16, wherein: the first reference ground unit and the second reference ground unit are electrically connected to each other, and the dielectric substrate is provided with a plurality of metallized through holes, the first reference ground The unit and the second reference ground unit are electrically connected through the metallized through hole.

The router according to claim 16, wherein: the first reference ground unit is provided with a first metal surface unit and a second metal surface unit electrically connected to each other, the first metal surface unit and the One end of the feeding line is oppositely positioned such that one end of the feeding line forms the microstrip line; the second reference ground unit is provided with a third metal surface unit, the third metal surface unit and the second metal surface unit position The first metallized through hole is opened in the second metal surface unit and the third metal surface unit, and the second metal surface unit and the third metal surface unit pass through The first metallized via is electrically connected.

The router according to claim 18, wherein: said third metal surface unit And at the end of the metal structure, the third metal surface unit has a long plate shape and is the same as the extending direction of the feed line, and the second reference ground unit further includes a fourth metal surface unit, the fourth The metal surface unit is located at one end of the feeding line and is located in the extending direction of the feeding line, and the dielectric substrate is located at the first metal surface unit and the fourth metal surface unit to open a plurality of second metallizations. a through hole, the first metal surface unit and the fourth metal surface unit being electrically connected through the second metallized through hole.

The router according to claim 18, wherein: the metal structure is provided with a frame body and two spiral wires located in the frame body, and the two spiral wires are connected to each other to form an open spiral ring, and the opening spiral The ring is connected to the frame, and the free end of the spiral has a panel shape.