TWI517491B - An antenna and mimo antenna with the antenna - Google Patents

Description

Antenna and MIMO antenna having the same

The present invention relates to the field of communications, and in particular, to an antenna and a MIMO antenna having the same.

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, as an important component of electronic systems, RF modules 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.

At the same time, with the complication of modern electronic systems, the demand for multi-mode services is becoming more and more important in systems such as wireless communication, wireless access, satellite communications, and wireless data networks. The demand for multimode services further increases the complexity of miniaturized antenna multimode designs. In addition to the technical challenges of miniaturization, multimode impedance matching of antennas has become a bottleneck in antenna technology. On the other hand, multi-input multi-output system (MIMO) is becoming more advanced in the field of wireless communication and wireless data services. The step size requires miniaturization of the antenna size while ensuring good isolation, radiation performance and anti-interference ability. However, conventional terminal communication antennas are mainly designed based on the radiation principle of electric monopoles or dipoles, such as 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 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, the miniaturized, multi-mode new antenna technology has become an important technical bottleneck of contemporary electronic integrated systems. In addition, when the antenna is used in the design, the use space is small, the working frequency is low, and the multi-mode problem is working, it is not enough.

In order to solve the above problems, the solution of the prior art generally achieves multimode radiation requirements by additionally providing matching lines outside the antenna. After adding a matching network to the antenna feeder system, it is functionally possible to achieve low-frequency, multi-mode operation requirements, but since a very large part of the energy loss is on the matching network, the radiation efficiency will be greatly reduced.

The technical problem to be solved by the present invention is to provide an antenna that further shortens the antenna size and works well in a low operating band and a MIMO antenna having the antenna, in view of the above-mentioned deficiencies of the prior art.

The present invention provides an antenna including a first dielectric substrate and covering the first a second dielectric substrate on a dielectric substrate; a first metal piece and a first feed line disposed around the first metal piece are disposed on the first surface of the first dielectric substrate, and the first feed line is fed into the first metal piece by coupling, And the first metal piece is hollowed out with a first micro-groove structure to form a first metal trace on the first metal piece.

According to a preferred embodiment of the present invention, the first dielectric substrate is opposite to the second surface of the first surface, and the second surface is provided with a second metal piece, and the second metal piece is electrically connected to the first feed line.

According to a preferred embodiment of the present invention, a metallized via hole is formed on the first dielectric substrate, and the first feed line and the second metal piece are electrically connected through the metallized through hole.

According to a preferred embodiment of the present invention, the first dielectric substrate is provided with a second metal sheet on the second surface of the first surface, the second metal strip is disposed around the second metal sheet, and the second feed line is fed into the second through coupling. a metal piece, the second feed line is electrically connected to the first feed line, and the second metal piece is hollowed out with a second micro-groove structure to form a second metal trace on the second metal piece, and the first metal piece is further covered with the second dielectric substrate.

According to a preferred embodiment of the present invention, a surface of the second dielectric substrate opposite to the second surface of the first dielectric substrate is provided with a third metal piece, and the third metal piece is electrically connected to the second feeding line.

According to a preferred embodiment of the present invention, the second feed line and the third metal piece are electrically connected through the metallized through holes provided in the second dielectric substrate.

According to a preferred embodiment of the invention, the first metal piece and the second metal piece are connected by metallized through holes or wires.

According to a preferred embodiment of the present invention, the first feed line and the second feed line are electrically connected by a metallized via provided in the first dielectric substrate.

According to a preferred embodiment of the invention, the second feed line and the second metal piece are capacitively coupled or inductively coupled.

According to a preferred embodiment of the present invention, the first microgroove or the second microgroove 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 bent line structure. One is a structure derived from one of the first five structures, a plurality of structural composites or one of the structural arrays.

According to a preferred embodiment of the invention, the first feed line and the first metal piece are capacitively coupled or inductively coupled.

According to a preferred embodiment of the present invention, the manufacturing materials of the first dielectric substrate and the second dielectric substrate include a ceramic material, a polymer material, a ferrite material, or a ferromagnetic material.

According to a preferred embodiment of the present invention, the first microgroove or the second microgroove 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 bent line structure. One is a structure derived from one of the first five structures, a plurality of structural composites or one of the structural arrays.

The present invention provides a MIMO antenna including a first dielectric substrate and a second dielectric substrate overlying the first dielectric substrate; a first metal sheet is disposed on the first surface of the first dielectric substrate and disposed around the first metal sheet The first feed line, the first feed line is fed into the first metal piece in a coupled manner, and the first metal piece is hollowed out with a first micro groove structure.

According to a preferred embodiment of the present invention, the first dielectric substrate is provided with a second metal piece on the second surface of the first surface, and the second metal piece is electrically connected to the first feed line.

According to a preferred embodiment of the present invention, the first dielectric substrate is provided with a second metal sheet on the second surface of the first surface, the second metal strip is disposed around the second metal sheet, and the second feed line is fed into the second through coupling. a metal piece, the second feed line is electrically connected to the first feed line, and the second metal piece is hollowed out with a second micro-groove structure to form a second metal trace on the second metal piece, and the first metal piece is further covered with the second dielectric substrate.

According to a preferred embodiment of the present invention, a surface of the second dielectric substrate opposite to the second surface of the first dielectric substrate is provided with a third metal piece, and the third metal piece is electrically connected to the second feeding line.

In accordance with a preferred embodiment of the present invention, a first feeder in the MIMO antenna is coupled to a second receiver and a receiver/transmitter, and the receiver/transmitter is coupled to a baseband signal processor.

According to a preferred embodiment of the present invention, the first microgroove or the second microgroove 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 bent line structure. One is a structure derived from one of the first five structures, a plurality of structural composites or one of the structural arrays.

Compared with the conventional antenna, the present invention covers the second dielectric substrate on the first dielectric substrate, and a coupling capacitor is formed between the two dielectric substrates, so that the antenna does not need to increase the length of the feeder when operating at a low frequency, thereby reducing the volume of the antenna. The antenna still works well at low frequencies without changing the length of the feeder, meeting the requirements of small antenna size, low operating frequency and wideband multimode. At the same time, the present invention also discloses a MIMO antenna including the above antenna. In addition to the characteristics of the antenna itself, the MIMO antenna has high isolation and strong anti-interference ability between multiple antennas.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments: a metamaterial antenna is based on an artificial electromagnetic material theory design, and an artificial electromagnetic material technology refers to a topological metal structure in which a metal sheet is etched into a specific shape, and the specific shape is The equivalent special electromagnetic material processed by the topological metal structure disposed on a certain dielectric constant and magnetic permeability substrate, the performance parameters of which are mainly determined by the topological metal structure of the specific shape of the sub-wavelength. 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 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.

The present invention utilizes the above principles to design an antenna. The utility model attaches the artificial metal microstructure artificial microstructure to the first dielectric substrate, and utilizes the high dispersion characteristic of the artificial metal microstructure artificial microstructure to make the antenna have rich radiation characteristics, thereby eliminating the design of the impedance matching network to realize the antenna miniaturization. In addition, the present invention also adds a second dielectric substrate to the antenna structure, and the second dielectric substrate covers the first dielectric substrate such that the distributed capacitance of the antenna increases.

As shown in FIG. 1, FIG. 1 is a schematic structural view of a first embodiment of an antenna according to the present invention. To more clearly illustrate the structure of the present invention, Figure 1 uses a perspective drawing method. In FIG. 1, the antenna includes a first dielectric substrate 1 and a second dielectric substrate 2 overlying the first dielectric substrate 1. The first surface of the first dielectric substrate 1 is provided with a first metal sheet 10 and surrounding the first a first feed line 11 provided by the metal piece 10, The first feed line 11 is fed into the first metal piece 10 in a coupled manner, and the first metal piece 10 is hollowed out with the first micro-slot structure 101.

The first feed line 11 is electrically connected to the first metal piece 10 through the short contact point 50 to form an inductive coupling with the first metal piece 10 to feed it, and the position of the short contact point 50 may be any position. In addition, the manner in which the first feeding line 11 feeds the first metal piece 10 may also be a capacitive coupling feeding mode, that is, the first feeding line 11 is disposed around the first metal piece 10 without being in contact with the first metal piece 10. The manner in which the second dielectric substrate 2 covers the first dielectric substrate 1 is various, and may be attached, adsorbed, or pressed.

As shown in FIG. 2 to FIG. 3, FIG. 2 is a schematic perspective view of a second embodiment of an antenna according to a second embodiment of the present invention. FIG. 3 is a schematic diagram of a first dielectric substrate after removing a second dielectric substrate in a second embodiment of the antenna of the present invention. The second embodiment of the antenna of the present invention is different from the first embodiment in that a second metal piece 12, a second metal piece 12 and a second surface are disposed on a second surface of the first surface of the first dielectric substrate 1. A feed line 11 is electrically connected to the first metal piece 10 through the metallized through hole 100 to make a capacitive coupling, so that the radiation area of the first feed line 11 is increased by the second metal piece 12, thereby reducing the first feed line 11 Loss, and the second dielectric substrate 2 increases the distributed capacitance of the antenna, which also reduces the operating frequency band of the antenna.

It can be known from the antenna radio frequency principle that the electrical length is a physical quantity describing the frequency of changes in the electromagnetic wave waveform, and the electrical length = physical length / wavelength. When the antenna is operated at a low frequency, the wavelength of the electromagnetic wave corresponding to the low frequency is long, and the physical length is necessary to maintain the electrical length. However, increasing the physical length cannot meet the requirements of miniaturization of the antenna, and increasing the physical length will result in an increase in feeder loss and a decrease in the overall performance of the antenna. The second metal piece provided by the embodiment 12 and the second dielectric substrate 2 solve the problem in two aspects.

In one aspect, the second metal piece 12 is electrically connected to the first feed line 11 such that the second metal piece 12 can be coupled to the first metal piece 10 and the amount of power fed can be from the second metal piece 12 and the first metal piece 10. The coupling capacitance formed between them is determined, so that when the antenna frequency is changed, the coupling performance area between the second metal piece 12 and the first metal piece 10 can be adjusted to satisfy the antenna performance requirement.

As shown in FIG. 4 to FIG. 5, the third embodiment of the antenna of the present invention is different from the second embodiment in that a second feed line 13, a first feed line 11 and a second feed line 13 are disposed around the second metal piece 12. The first metal piece 10 and the second metal piece 12 are respectively fed by a coupling method, and the first metal piece 10 is hollowed out with a first micro groove structure 101 to form a first metal wire 42 on the first metal piece 10, The second metal piece 12 is hollowed out with a second micro-groove structure 121 to form a second metal trace 72 on the second metal piece 12, and the first feed line 11 is electrically connected to the second feed line 13. This design is equivalent to increasing the physical length of the antenna (the actual length does not increase), so that the RF antenna operating at very low operating frequencies can be designed in a very small space. Solve the physical limitation of the controlled space area of the antenna when the traditional antenna operates at low frequencies.

As shown in FIGS. 4 and 5, the first feed line 11 and the second feed line 13 are electrically connected by a metallized through hole 100 opened in the first dielectric substrate 1. It is of course also possible to use wire connections.

In Fig. 4, the portion of the first metal piece 10 where the hatching is drawn is the first metal trace 42, and the blank portion (the hollowed portion) of the first metal sheet 10 represents the first microgroove structure 101. In addition, the first feed line 11 is also indicated by a hatching. Similarly, in FIG. 5, the portion of the second metal piece 12 that draws the hatching is the second metal trace 72. The blank portion (the hollowed portion) on the second metal piece 12 represents the second microgroove structure 121. In addition, the second feed line 13 is also indicated by a hatching.

FIG. 4 is a schematic view showing the structure of the antenna of the present embodiment after the second dielectric substrate 12 is removed. The first surface and the second surface of the first dielectric substrate 1 have the same structure. That is, the projections of the first feed line 11 and the first metal piece 10 on the second surface coincide with the second feed line 13 and the second metal piece 12, respectively. Of course, this is only a preferred solution, and the structures of the first surface and the second surface may also be different as needed.

The first feed line 11 is disposed around the first metal sheet 10 to effect signal coupling. In addition, the first metal piece 10 may or may not be in contact with the first feed line 11. When the first metal piece 10 is in contact with the first feed line 11, the first feed line 11 is inductively coupled with the first metal piece 10; when the first metal piece 10 is not in contact with the first feed line 11, the first feed line 11 is The first metal sheets 10 are capacitively coupled.

The second feed line 13 is disposed around the second metal piece 12 to effect signal coupling. In addition, the second metal piece 12 may or may not be in contact with the second feed line 13. When the second metal piece 12 is in contact with the second feed line 13, the second feed line 13 is inductively coupled with the second metal piece 12; when the second metal piece 12 is not in contact with the second feed line 13, the second feed line 13 is The second metal sheets 12 are capacitively coupled.

As shown in FIG. 6 to FIG. 7 , the fourth embodiment of the antenna of the present invention is different from the third embodiment in that the second dielectric substrate 2 is disposed under the first dielectric substrate 1 and on the side of the second dielectric substrate 2 . The surface is in close contact with the second surface of the first dielectric substrate 1, and the other side surface is provided with a third metal sheet 21.

The first feed line 11 and the second feed line 13 are each fed into the first micro-slot structure 101 and the second micro-slot structure 121 by coupling. The coupling mode can be either inductive coupling or capacitive coupling. When using inductive coupling, first There are short contacts between the feed line 11 and the first microstructure 101, the second feed line 13 and the second micro-slot structure 121 to connect the two; when the capacitive coupling mode is adopted, the first feed line 11 and the first microstructure 101 The second feed line 13 and the second micro-slot structure 121 are not in contact with each other, but the opposite portions constitute a coupling capacitance such that the two form a capacitive coupling.

The first micro-groove structure 101 and the second micro-groove structure 121 are formed on the first metal sheet 10 and the second metal sheet 12 by etching, drilling, photolithography, electron engraving, ion etching, etc., wherein the etching is performed. In order to optimize the process, the main step is to form the micro-groove structure after the appropriate micro-groove structure is designed, and then the etching process is used to remove the foil portion of the predetermined micro-groove structure by chemical reaction of the solvent and the metal. Metal sheet. The material of the metal foil may be a metal such as copper or silver.

When the antenna operates in the low frequency band, the electromagnetic wave in the low frequency band corresponds to a longer wavelength. According to the antenna design principle, the electric radiation length of the antenna feed line will increase accordingly, so that the physical length of the feeding line becomes longer, and the longer feeding line is not only disadvantageous to the antenna overall. The miniaturization also causes the feeder loss to increase, resulting in a decrease in the overall performance of the antenna.

The detailed technical solutions for solving the technical problem in this embodiment are discussed in detail below.

In the first dielectric substrate 1 and the second dielectric substrate 2 of the antenna of the present embodiment, a first metal piece 10, a first feed line 11, a second metal piece 12, and a second feed line 113 are disposed. The first feed line 11 and the second feed line 13 are connected to each other by a metallized through hole 3.

In this embodiment, the effective radiation area of the feeder is increased from two aspects without changing the physical length of the feeder. The first aspect is to increase the radiation area of the feed line by the first metal piece 10 and the second metal piece 12 disposed on the first dielectric substrate 1 by the coupling relationship between the two metal pieces. First dielectric substrate 1 two relative tables The first metal piece 10 of the surface may or may not be connected to the second metal piece 12. In the case where the first metal piece 10 and the second metal piece 12 are not connected, the first metal piece 10 and the second metal piece 12 are fed by capacitive coupling; in this case, by changing the dielectric substrate The thickness of the first metal piece 10 and the second metal piece 12 can be achieved. In the case where the first metal piece 10 is electrically connected to the second metal piece 12 (for example, by wire or metallized through hole), the first metal piece 10 and the second metal piece 12 are inductively coupled. Feeding.

In a second aspect, the third metal piece 21 disposed on the second dielectric substrate 2 is coupled to the second metal piece 12 disposed on the second surface of the first dielectric substrate 1 to form a second micro groove formed on the second metal piece 12. Structure 121 is coupled to feed. Metallized vias 4 are formed on the second dielectric substrate 2, and the metallized vias 4 may be offset from the metallized vias 3 on the first dielectric substrate 1 on a vertical plane. The metalized via 4 electrically connects the second feed line 13 with the third metal piece 21. The area of the third metal piece 21 coupled to the feed is easy to adjust, and the coupling feed area of the third metal piece 21 can be simply adjusted for different working frequency bands.

The first microchannel structure 101 and the second microchannel structure 121 in the present invention may be the complementary open resonant ring structure shown in FIG. 8, the complementary spiral structure shown in FIG. 9, and the opening shown in FIG. One of the spiral ring structure, the double-open spiral ring structure shown in FIG. 11, and the complementary bent line structure shown in FIG. 12 is derived from one of the first five structures, and the plurality of structures are combined or one of the structural groups. The structure obtained by the array.

Derivatization is divided into two types, one is geometric shape derivation, and the other is extended derivation. Here, geometric derivation refers to structural derivatives with similar functions and different shapes. Raw, for example, derived from a box-like structure to a curve-like structure, a triangular-like structure, and other different polygonal-like structures; the extended derivative here opens a new groove on the basis of Figures 8 to 12 to form a new micro-groove Structure; taking the complementary open resonant ring structure shown in FIG. 8 as an example, FIG. 13 is a schematic diagram of its geometric shape, and FIG. 14 is a schematic diagram of its geometric shape.

The composite here means that the microgroove structures of FIGS. 8 to 12 are superposed to form a new microgroove structure, as shown in FIG. 15, which is a composite of the three complementary open resonant ring structures shown in FIG. Schematic diagram of the structure; as shown in FIG. 16, a schematic structural view of the complementary open resonant ring structure shown in FIG. 8 and the complementary spiral structure shown in FIG.

The array here refers to a micro-groove structure formed by arraying a plurality of micro-groove structures shown in FIG. 8 to FIG. 12 on the same metal sheet, as shown in FIG. 17, which is complementary to each other as shown in FIG. Schematic diagram of the structure after the array of open resonant ring structures. The invention has been described above by taking the open spiral ring structure shown in Fig. 10 as an example.

Further, in the present invention, the materials of the first dielectric substrate 1 and the second dielectric substrate 2 include 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, a polymer material such as FR-4 or F4B.

In the present invention, the first metal piece 10, the second metal piece 12, and the third metal piece 21 are copper pieces or silver pieces. It is preferably a copper sheet, which is inexpensive and has good electrical conductivity.

In the present invention, the first feed line 11 and the second feed line 13 are made of the same material as the first metal piece 10 and the second metal piece 12, preferably copper.

It can be known from the antenna radio frequency principle that the electrical length is a physical quantity describing the frequency of changes in the electromagnetic wave waveform, and the electrical length = physical length / wavelength. When the antenna is operated at a low frequency, the wavelength of the electromagnetic wave corresponding to the low frequency is long, and the physical length is necessary to maintain the electrical length. However, increasing the physical length cannot necessarily meet the requirements for miniaturization of the antenna. The present invention covers the first dielectric substrate 1 with a second dielectric substrate 2. When the antenna receives or emits electromagnetic waves, the electromagnetic waves need to be transmitted or received through the second dielectric substrate 2, so that the distributed capacitance of the entire antenna is increased. Big. According to the formula: It can be seen that increasing the distributed capacitance can effectively reduce the operating frequency of the antenna so that the electrical length can be maintained without increasing the physical length. Moreover, by changing the materials of the second dielectric substrate 2 and the first dielectric substrate 1, the distributed capacitance of the whole antenna can be changed, so that the purpose of changing the electrical length without changing the physical length can be achieved for different frequencies, so that Design an RF antenna that operates at very low operating frequencies in a very small space.

In the present invention, regarding the processing and manufacturing of the antenna, 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 various types of printed circuit board (PCB) manufacturing methods, metalized through holes, double-sided copper-clad PCB manufacturing to meet the processing requirements of the present invention. In addition to this processing method, other processing means can be introduced according to actual needs, such as RFID (RFID is the abbreviation of Radio Frequency Identification, that is, radio frequency identification technology, commonly known as electronic label), the processing method of conductive silver paste ink, various types can be The flexible PCB processing of the deformation device, the processing method of the iron piece antenna, and the processing method of the combination of the iron piece and the 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 micro-structure part of the chip, and the iron piece is used to complete other auxiliary parts.

The present invention also provides a multiple input multiple output (MIMO) antenna comprising a plurality of the above antennas, each of the first and second feeders being connected to a transmitter/receiver, all of the transmitters/receivers Connected to the baseband signal processor.

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.

1‧‧‧First dielectric substrate

2‧‧‧Second dielectric substrate

3‧‧‧Metalized through holes

4‧‧‧Metalized through holes

10‧‧‧First sheet metal

11‧‧‧First feeder

12‧‧‧Second metal piece

13‧‧‧second feeder

21‧‧‧ Third metal sheet

42‧‧‧First metal trace

50‧‧‧ Short contact points

72‧‧‧Second metal trace

100‧‧‧Metalized through holes

101‧‧‧First microgroove structure

121‧‧‧Second microgroove structure

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work. 1 is a schematic structural view of a first embodiment of an antenna according to the present invention; FIG. 2 is a schematic perspective view of a second embodiment of the antenna according to the second embodiment of the present invention; FIG. 4 is a first schematic view of the third embodiment of the antenna of the present invention after removing the second dielectric substrate; FIG. 5 is the third embodiment of the antenna of the present invention after removing the second dielectric substrate FIG. 6 is a schematic view of the second embodiment of the antenna according to the fourth embodiment of the present invention FIG. 7 is a schematic view of a second dielectric substrate after removing the first dielectric substrate in the fourth embodiment of the antenna of the present invention; FIG. 8 is a schematic diagram of a complementary open resonant ring structure; FIG. 9 is a complementary spiral structure; Figure 10 is a schematic view of an open spiral ring structure; Figure 11 is a schematic view of a double-open spiral ring structure; Figure 12 is a schematic view of a complementary curved wire structure; Figure 13 is a complementary open resonant ring structure shown in Figure 8 FIG. 14 is a schematic diagram of the expanded structure of the complementary open resonant ring structure shown in FIG. 8; FIG. 15 is a schematic structural view of the composite open resonant ring structure shown in FIG. 8; FIG. Two complementary open resonant ring structures shown in FIG. 8 and a complementary spiral structure shown in FIG. 9; FIG. 17 is a schematic structural view of the complementary open resonant ring structure array shown in FIG. .

1‧‧‧First dielectric substrate

2‧‧‧Second dielectric substrate

10‧‧‧First sheet metal

11‧‧‧First feeder

50‧‧‧ Short contact points

101‧‧‧First microgroove structure

Claims (11)

An antenna, wherein the antenna includes a first dielectric substrate and a second dielectric substrate overlying the first dielectric substrate; a first metal sheet is disposed on the first surface of the first dielectric substrate and surrounds the a first feed line disposed on the first metal piece, the first feed line is fed into the first metal piece in a coupled manner, and the first metal piece is hollowed out with a first micro groove structure to form on the first metal piece a first metal trace, a second metal sheet is disposed on the second surface of the first dielectric substrate relative to the first surface, and a second feed line is disposed around the second metal sheet, and the second feed line passes Couplingly feeding the second metal piece, the second feed line and the first feed line are electrically connected through a metallized through hole disposed on the first dielectric substrate, and the second metal piece is hollowed out to have a second micro a trench structure for forming a second metal trace on the second metal sheet, the first metal sheet further covered with a second dielectric substrate, the second dielectric substrate being opposite to the second surface of the first dielectric substrate One side surface A third metal sheet, the third metal plate is electrically connected to the second feed line. The antenna according to claim 1, wherein the second feed line and the third metal piece are electrically connected by a metallized through hole provided in the second dielectric substrate. The antenna of claim 1, wherein the second feed line and the second metal piece are capacitively coupled or inductively coupled. The antenna according to claim 1, wherein the first microgroove or the second microgroove structure is a complementary open resonant ring structure, a complementary spiral structure, an open spiral ring structure, and a double open spiral ring structure. Complementary bending One of the wire structures is a structure obtained by one of the first five structures, a plurality of structural composites or one of the structural arrays. The antenna of claim 1, wherein the first feed line and the first metal piece are capacitively coupled or inductively coupled. The antenna according to claim 1, wherein the first dielectric substrate and the second dielectric substrate are made of a ceramic material, a polymer material, a ferrite material or a ferromagnetic material. The antenna according to claim 1, wherein the first microgroove or the second microgroove structure is a complementary open resonant ring structure, a complementary spiral structure, an open spiral ring structure, and a double open spiral ring structure. And one of the complementary bent line structures or a structure obtained by one of the first five structures, wherein the plurality of structures are composited or one of the structures is arrayed. A MIMO antenna, wherein the MIMO antenna includes a first dielectric substrate and a second dielectric substrate overlying the first dielectric substrate; the first surface of the first dielectric substrate is provided with a first metal piece and surrounding a first feeding line of the first metal piece, the first feeding line is fed into the first metal piece in a coupled manner, and the first metal piece is hollowed out with a first micro groove structure, the first dielectric substrate a second metal sheet is disposed on the second surface of the first surface, and a second feeding line is disposed around the second metal sheet, and the second feeding line is fed into the second metal sheet by coupling. The second feed line is electrically connected to the first feed line through a metallized through hole disposed on the first dielectric substrate, and the second metal piece is hollowed out with a second micro groove structure to form a second on the second metal piece. a second metal substrate, the first metal substrate is further covered with a second dielectric substrate, and the second dielectric substrate is opposite to the second surface of the first dielectric substrate One side surface is provided with a third metal piece, and the third metal piece is electrically connected to the second feed line. The MIMO antenna according to claim 8, wherein a surface of the second dielectric substrate opposite to a second surface of the first dielectric substrate is provided with a third metal piece, the third metal piece Electrically connected to the second feed line. The MIMO antenna according to claim 8, wherein the first feeder in the MIMO antenna is connected to the second feeder to receive/transmit, and the receiver/transmitter is connected to a baseband signal processor. . The MIMO antenna according to claim 8, wherein the first microgroove or the second microgroove structure is a complementary open resonant ring structure, a complementary spiral structure, an open spiral ring structure, and a double open spiral ring. One of the structure and the complementary bending line structure is a structure obtained by one of the first five structures, a plurality of structural composites or one of the structural arrays.