TWI487189B - A metamaterial antenna and preparation method thereof - Google Patents

Description

Super material RF antenna and preparation method thereof

The invention relates to an antenna and a preparation method thereof, in particular to a metamaterial radio frequency antenna and a preparation method thereof.

The antennas in the conventional communication system are mainly dipole antennas and PIFA antennas. The important indexes such as size, bandwidth, and gain of the antenna are limited by basic physical principles (gain limit, bandwidth limit, etc. at a fixed size). The basic physical principles of the limits of these indicators make the miniaturization of antennas far more difficult than other devices. Due to the complexity of electromagnetic field analysis of RF devices, approaching these limits has become a huge technical challenge. Therefore, 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 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.

Therefore, the miniaturized, multi-mode new antenna technology has become an important technical bottleneck of contemporary electronic integrated systems.

The technical problem to be solved by the present invention is to provide a super material radio frequency antenna with smaller space and a preparation method thereof according to the above-mentioned deficiencies of the prior art.

The present invention provides a metamaterial radio frequency antenna comprising a metal branch, the metal branch including the first portion and the second portion electrically connected, and the first portion of the metal branch and the second portion of the metal branch are respectively disposed on different substrate surfaces, The metal branches are planarly unfolded to form a feed line and an artificial metal microstructure, the feed line being disposed around the man-made metal microstructure.

According to a preferred embodiment of the present invention, the substrate comprises a first substrate and a second substrate, wherein the surface of the first substrate is attached with a first portion of the artificial metal microstructure and a first portion of the feed line, the surface of the second substrate A second portion of the man-made metal microstructure and a second portion of the feeder are attached.

According to a preferred embodiment of the present invention, the first partial fracture end of the artificial metal microstructure and the first partial fracture end of the feed line are electrically connected to the second partial fracture end of the artificial metal microstructure and the second partial fracture end of the feed line, respectively. .

In accordance with a preferred embodiment of the present invention, the second portion of the man-made metal microstructure extends from the second portion of the man-made metal microstructure to the second substrate and the first portion of the man-made metal microstructure from the man-made metal microstructure The first portion of the fracture end extends in the same direction on the first substrate.

According to a preferred embodiment of the present invention, the first substrate is further provided with a first metallized via and a second metallized via, the two ends of the first metallized via corresponding to the first end of the artificial metal microstructure a second portion of the fracture point of the man-made metal microstructure, the two ends of the second metallization via correspond to the first end of the feed line and the second end of the feed line; the first portion of the man-made metal microstructure and the man-made metal micro The second portion of the structure is electrically connected through the first metallized via, the first portion of the feed line and the second portion of the feed line being electrically connected through the second metallized via.

According to a preferred embodiment of the present invention, the side surface of the first substrate is provided with a first connecting portion and a second connecting portion, the two ends of the first connecting portion corresponding to the artificial metal microstructure a first portion of the fracture end and a second portion of the fracture point of the man-made metal microstructure, the two ends of the second connection portion corresponding to the first end of the feed line and the second end of the feed line; the first portion of the man-made metal microstructure And the second portion of the man-made metal microstructure is electrically connected by the first connection, the first portion of the feed line and the second portion of the feed line being electrically connected by the second connection.

According to a preferred embodiment of the present invention, the topological pattern of the artificial metal microstructure is one of 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, or It is a structure derived from one of the first five structures, in which a plurality of structural composites or one of the structural arrays is obtained.

In accordance with a preferred embodiment of the present invention, the substrate includes a first surface and a second surface opposite the first surface, wherein the first surface of the substrate is attached with the first portion of the man-made metal microstructure and the first portion of the feed line, the substrate The second surface is attached with a second portion of the man-made metal microstructure and a second portion of the feed line.

According to a preferred embodiment of the present invention, the first partial fracture end of the artificial metal microstructure and the first partial fracture end of the feed line are electrically connected to the second partial fracture end of the artificial metal microstructure and the second partial fracture end of the feed line, respectively. .

In accordance with a preferred embodiment of the present invention, the second portion of the man-made metal microstructure extends from the second portion of the man-made metal microstructure to the second end of the substrate and the first portion of the man-made metal microstructure from the man-made metal The first portion of the microstructure has a fracture end that extends in the same direction on the first surface of the substrate.

According to a preferred embodiment of the present invention, the substrate is further provided with a first metallized via and a second metallized via, the two ends of the first metallized via corresponding to the first end of the artificial metal microstructure and the artificial metal The second portion of the microstructure is broken at the end point, and the two ends of the second metallized through hole correspond to the first end of the feed line a second portion of the feed line is broken; the first portion of the man-made metal microstructure and the second portion of the man-made metal microstructure are electrically connected by the first metallized via, the first portion of the feed line and the second portion of the feed line being passed through the second metallization The through holes are electrically connected.

According to a preferred embodiment of the present invention, the side surface of the substrate is provided with a first connecting portion and a second connecting portion, the two ends of the first connecting portion corresponding to the first portion of the artificial metal microstructure and the second portion of the artificial metal microstructure a portion of the fracture end, the two ends of the second connection portion correspond to a first portion of the fracture end of the feed line and a second portion of the fracture end of the feed line; the first portion of the artificial metal microstructure and the second portion of the man-made metal microstructure pass the first The connection portion is electrically connected, and the first portion of the feed line and the second portion of the feed line are electrically connected by the second connection portion.

According to a preferred embodiment of the present invention, the topological pattern of the artificial metal microstructure is one of 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, or It is a structure derived from one of the first five structures, in which a plurality of structural composites or one of the structural arrays is obtained.

According to a preferred embodiment of the invention, the substrate is made of ceramic, high molecular polymer, ferroelectric material, ferrite material or ferromagnetic material.

According to a preferred embodiment of the invention, the cross-sectional pattern of the substrate is circular, elliptical or polygonal.

The invention provides a method for preparing a metamaterial radio frequency antenna, which comprises the following steps: S1: fabricating a substrate; S2: attaching a desired metal branch on the surface of the substrate; S3: electrically connecting metal branches on the surface of the substrate; and step S3 comprises: S311: forming a through hole on the substrate by a numerically controlled drilling machine drilling, a numerically controlled punch punching or a laser drilling method at a metal branch end requiring electrical connection; S312: liquidating by screen printing, mask printing or through hole casting The metal is filled in the through holes.

According to a preferred embodiment of the invention, in steps S1 to S3, the substrate is a ceramic substrate.

According to a preferred embodiment of the present invention, step S1 specifically includes: S11: mixing the organic vehicle and the glass ceramic powder; and S12: casting.

According to a preferred embodiment of the present invention, the preparation method further comprises the step S4 of pressing the plurality of substrates into one body.

According to a preferred embodiment of the present invention, the preparation method further comprises the step S5 of sintering the plurality of substrates integrally pressed in the step S4.

According to a preferred embodiment of the invention, the sintering temperature is below 1000 degrees in step S5.

The invention planarizes and spatializes the planar antenna structure, and electrically connects the planar metal microstructure and the feed line to the substrate, and a part of the metal microstructure and part of the feeder line disposed on different substrate surfaces make the antenna occupy the plane space as a whole. Smaller, making full use of the space where the antenna is located, making the antenna more compact. Further, the present invention employs a ceramic material as the material of the substrate of the present invention, so that the present invention has the beneficial effects of being easy to implement, simple in process, and excellent in electromagnetic parameters.

The antenna structure of the prior art shown in FIG. 1 includes a feed line 2 and an artificial metal microstructure 1, wherein the topographical pattern of the artificial metal microstructure 1 is various, as shown in FIGS. 2 to 6, respectively. The various patterns in the figure are flat patterns and occupy a large space, so that they can be improved by using the design idea of the present invention. One of the patterns is selected below for detailed description, but it should be understood that the design of other patterns can be easily known using the principles of the present invention.

At the same time, in order to adapt to the planar space shape reserved for the antenna inside the electronic device In the shape, the cross-sectional shape of the substrate of the present invention can be designed into various shapes such as a circle, an ellipse, a polygon, and the like. The embodiments described below are described by way of example in which the cross-sectional shape is a quadrilateral substrate for convenience of illustration.

As shown in FIG. 7, FIG. 7 is a schematic structural view of a first embodiment of a metamaterial radio frequency antenna according to the present invention, which includes a first substrate 101 and a second substrate 102. Wherein the first substrate 101 is printed with a first portion 1011 of the artificial metal microstructure and a first portion 1012 of the feed line, the first portion 1011 of the artificial metal microstructure and the end of the first portion 1012 of the feed line are provided with metallized through holes 1013 and 1014 . A second portion 1021 of the man-made metal microstructure and a second portion 1022 of the feed line are printed on the second substrate 102. The two ends of the metallized through hole 1013 respectively correspond to the fracture end point 1011a of the first portion 1011 of the artificial metal microstructure and the fracture end point 1021a of the second portion 1021 of the artificial metal microstructure, and the two ends of the metallized through hole 1014 respectively correspond to the feed line The first portion 1012 of the break end 1012a and the second portion 1022 of the feed line break the end point 1022a. The second portion 1021 of the man-made metal microstructure breaks from the first portion of the man-made metal microstructure and the first portion 1011 of the man-made metal microstructure from the first portion of the man-made metal microstructure 1011 from the second portion of the man-made metal microstructure. The direction in which the end points 1011a extend on the first substrate 101 coincides. The metal structures printed on the first substrate 101 and the second substrate 102 are planarly developed to form the antenna structure shown in FIG. Due to the spatial stereo structure, the super-material RF antenna is designed to reduce the planar area by 1/2.

When the antenna size requirement is smaller, the three-dimensional space can be further utilized, as shown in FIG. FIG. 8 is a schematic structural view of a second embodiment of a metamaterial radio frequency antenna according to the present invention. The difference from the first embodiment is that instead of providing metallized through holes on the two substrates, the connecting portions 1015 and 1016 connecting the upper and lower metal structures are printed on the sides of the substrate, and the material of the connecting portion is connected thereto. Feeder part and man-made The metal microstructure portions are made of the same material and the two ends of the connecting portion 1015 respectively correspond to the fracture end of the first portion 1011 of the artificial metal microstructure and the fracture end of the second portion 1021 of the artificial metal microstructure, and the two ends of the connection portion 1016 respectively correspond to The break end of the first portion 1012 of the feed line and the break end of the second portion 1022 of the feed line. The second portion 1021 of the artificial metal microstructure is extended from the second portion of the artificial metal microstructure to the second substrate 102 and the first portion 1011 of the artificial metal microstructure is separated from the first portion of the artificial metal microstructure. The direction in which a substrate 101 extends is uniform. This not only saves cost but also makes the ceramic antenna as a whole more compact. More importantly, due to the use of the connecting portion to connect the various parts of the artificial metal microstructure of the adjacent substrate, the overall anti-interference ability of the antenna is stronger and the electromagnetic compatibility is also improved. Stronger.

As shown in FIG. 9, FIG. 9 is a schematic structural view of a third embodiment of a metamaterial radio frequency antenna according to the present invention. The main difference of the third embodiment compared to the first two embodiments is that it includes only one substrate 200, and the artificial metal microstructure is split and distributed on the upper and lower surfaces of the substrate 200. Specifically, the substrate 200 includes a first surface 201 and a second surface 202 opposite the first surface 201. The first surface 201 is printed with a first portion 2011 of the man-made metal microstructure and the first portion 2012 of the feeder, the first portion 2011 of the man-made metal microstructure and the end of the first portion 2012 of the feeder are provided with metallized through holes 2013 and 2014. A second portion 2021 of the man-made metal microstructure and a second portion 2022 of the feed line are printed on the second surface 202. The two ends of the metallized through hole 2013 respectively correspond to the fracture end point 2011a of the first portion 2011 of the man-made metal microstructure and the fracture end point 2021a of the second portion 2021 of the man-made metal microstructure, and the two ends of the metallized through hole 2014 respectively correspond to the feeder line The first portion 2012 break end point 2012a and the second portion 2022 of the feed line break the end point 2022a. The second part of the man-made metal microstructure 2021 from people A second portion of the metal-forming microstructure extends over the second surface 202 in a direction extending from the second surface 202 and a first portion 2011 of the man-made metal microstructure extends from the first portion fracture end point 2011a of the man-made metal microstructure on the first surface 201 The direction is the same. The planar structure shown in Fig. 1 is formed after all of the metal structures printed on the first surface 201 and the second surface 202 are unfolded. Due to the spatial stereo structure, the super-material RF antenna is designed to reduce the planar area by 1/2.

When the antenna size requirement is smaller, the three-dimensional space can be further utilized, as shown in FIG. FIG. 10 is a schematic structural view of a fourth embodiment of a metamaterial radio frequency antenna according to the present invention. The difference from the third embodiment is that it does not provide a metallized through hole on the substrate, but prints the connecting portions 2015 and 2016 connecting the upper and lower metal structures on the side of the substrate, and the material of the connecting portion and the feeding line connected thereto The portion and the artificial metal microstructure portion are made of the same material and the two ends of the joint portion 2015 correspond to the fracture end point of the first portion 2011 of the artificial metal microstructure and the fracture end point of the second portion 2021 of the artificial metal microstructure, and the two ends of the joint portion 2016 Corresponding to the fracture end of the first portion of the feeder line 2012 and the fracture end of the second portion 2022 of the feed line, respectively. The second portion 2021 of the man-made metal microstructure 2021 extends from the fracture end of the second portion 2021 of the man-made metal microstructure on the second surface 202 with the first portion of the man-made metal microstructure 2011 from the fracture end of the first portion of the man-made metal microstructure at The direction of extension on a surface 201 is uniform. This not only saves cost but also makes the ceramic antenna as a whole more compact. More importantly, since the connecting portion is connected to each part of the artificial metal microstructure disposed on different adjacent surfaces, the overall anti-interference ability of the antenna is stronger. The electromagnetic compatibility is also stronger.

The substrate material of the present invention can be made of ceramic, high molecular polymer, ferroelectric material, ferrite material or ferromagnetic material. Among them, the high molecular polymer is preferably a FR-4 or F4B material. More preferably, the substrate of the present invention uses a ceramic substrate, Due to the excellent electromagnetic properties of the ceramic material, the supermaterial RF antenna of the present invention has excellent electromagnetic parameters.

Next, a method of preparing the metamaterial radio frequency antenna of the present invention will be described in detail. As shown in FIG. 11, a preparation process of a metamaterial radio frequency antenna having a multilayer substrate includes: S1: fabricating a substrate; S2: attaching a desired metal branch to the surface of the substrate; and S3: electrically connecting metal branches on the surface of the substrate.

Wherein, the metal branch on the surface of the substrate electrically connected to the step S3 can form a metalized via hole on the substrate to electrically connect the metal branch on the surface of the substrate, or electrically connect the metal on the surface of the substrate by printing a connection portion on the side of the substrate. Branch. As shown in FIG. 14, the step S3 further includes: S311: punching holes at the ends of the metal branches that need to be electrically connected, the diameter of the through holes is 0.1 to 0.5 mm, and the drilling can be performed by using a numerically controlled drilling machine, a numerically punching machine, and a laser punching. Holes and other methods; S312: through-hole filling, through-hole filling can be filled with liquid metal in a variety of ways, such as screen printing, mask printing and through-hole casting, wherein through-hole casting is a better way.

When a plurality of substrates are used and a ceramic material is used as the substrate material of the present invention, the preparation process of the present invention is as shown in FIG. 12. According to the electromagnetic parameter requirements of the antenna, the method in FIG. 11 further includes: step S4: multiple substrates are used. Pressing is integrated; S5: sintering a plurality of substrates pressed in step S4.

Wherein, the sintering temperature in the step S5 is less than 1000 degrees. Meanwhile, the step of preparing the ceramic substrate is as shown in FIG. 13, and the step S1 further comprises: S11: mixing the organic carrier and the glass ceramic powder, and the mixed mixture will contribute to the improvement of the ceramic substrate. The quality factor causes the ceramic substrate to have a relative dielectric constant ranging from 5 to 30; S12: casting to form a plurality of ceramic substrates.

In summary, the metamaterial radio frequency antenna of the present invention and the preparation method thereof use the electromagnetic coupling principle in the design of the metamaterial to add a symmetric or asymmetric metal microstructure to the substrate, and the metal microstructure can be a traditional metamaterial design. Any topology used in the structure, that is, the topology of the metal microstructure includes, but is not limited to, 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. Or a structure derived from one of the first five structures, wherein the plurality of structures are composited or one of the structures is arrayed, and then the first portion and the second portion of the metal microstructure are electrically connected through a perforation or joint. Together, this forms a folded metal microstructure on the substrate. This design makes full use of the space area of the antenna and increases the electrical length of the antenna within the equivalent area. In this way, a small material antenna with a very low operating frequency can be designed in a very small space. Since this design increases the structure type of the antenna, the antenna is very easy to generate multi-mode resonance, which simultaneously satisfies the requirements of small antenna size, low operating frequency, and wideband multimode.

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‧‧‧Artificial metal microstructure

2‧‧‧ feeder

101‧‧‧First substrate

102‧‧‧Second substrate

1011‧‧ The first part of the artificial metal microstructure

1011a‧‧ The fracture end of the first part 1011 of the man-made metal microstructure

1012‧‧‧The first part of the feeder

1012a‧‧‧ The first part of the feeder 1012 break end

1013‧‧‧Metalized through holes

1014‧‧‧Metalized through holes

1015‧‧‧Connecting Department

1016‧‧‧Connecting Department

1021‧‧ The second part of the artificial metal microstructure

1021a‧‧ The fracture end of the second part 1021 of the man-made metal microstructure

1022‧‧‧Part 2 of the feeder

1022a‧‧‧ The second part of the feeder 1022 breaks the end

200‧‧‧ substrates

201‧‧‧ first surface

202‧‧‧ second surface

2011‧‧‧The first part of the artificial metal microstructure

2011a‧‧ The break point of the first part of the artificial metal microstructure 2011

The first part of the 2012‧‧ ‧ feeder

2012a‧‧‧ The first part of the feeder line 2012 breakpoint

2013‧‧‧Metalized through hole

2014‧‧‧Metalized through hole

2015‧‧‧Connecting Department

2016‧‧‧Connecting Department

2021‧‧Man-made metal microstructures part two

2021a‧‧ The break point of the first part of the man-made metal microstructure 2011

2022‧‧‧ with the second part of the feeder

2022a‧‧‧ with the second part of the feeder 2022 broken end

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 diagram of a conventional antenna structure; FIG. 2 ^to FIG. 6 are schematic diagrams of a conventional artificial metal microstructure topology; FIG. 7 is a schematic structural view of a first embodiment of a metamaterial RF antenna according to the present invention; FIG. 9 is a schematic structural view of a third embodiment of a metamaterial radio frequency antenna according to the present invention; FIG. 10 is a schematic structural view of a fourth embodiment of a metamaterial radio frequency antenna according to the present invention; 11 is a flow chart of a preparation process of a super material radio frequency antenna according to the present invention; FIG. 12 is a flow chart of a process for preparing a super material radio frequency antenna using a ceramic substrate according to the present invention; and FIG. 13 is a process for preparing a super material radio frequency antenna using a ceramic substrate according to the present invention; FIG. 14 is a flowchart of a specific implementation of the S3 step of the super material RF antenna preparation process of the present invention.

101. . . First substrate

102. . . Second substrate

1011. . . The first part of the man-made metal microstructure

1011a. . . The fracture end of the first part 1011 of the man-made metal microstructure

1012. . . The first part of the feeder

1012a. . . The fracture endpoint of the first portion 1012 of the feeder

1013. . . Metalized through hole

1014. . . Metalized through hole

1021. . . The second part of the man-made metal microstructure

1021a. . . Break end of the second part 1021 of the man-made metal microstructure

1022. . . The second part of the feeder

1022a. . . The second part of the feeder, 1022, breaks the end point

Claims (21)

A metamaterial radio frequency antenna, wherein the metamaterial radio frequency antenna comprises a metal branch, the metal branch comprising a first portion and a second portion electrically connected, and a first portion of the metal branch and a second portion of the metal branch Separately disposed on different substrate surfaces, the metal branches are planarly developed to form a feed line and an artificial metal microstructure, the feed line being disposed around the artificial metal microstructure. The metamaterial radio frequency antenna according to claim 1, wherein the substrate comprises a first substrate and a second substrate, wherein the surface of the first substrate is attached with the artificial metal microstructure A first portion of the feed line and a first portion of the feed line, a second portion of the man-made metal microstructure and a second portion of the feed line attached to a surface of the second substrate. The metamaterial radio frequency antenna according to claim 2, wherein the first portion of the fracture point of the man-made metal microstructure and the first portion of the fracture line of the feed line are respectively opposite to the second portion of the man-made metal microstructure The partial break end and the second partial break end of the feed line are electrically connected. The metamaterial radio frequency antenna according to claim 3, wherein the second portion of the man-made metal microstructure extends from the second portion of the fracture point of the man-made metal microstructure on the second substrate The direction coincides with a direction in which the first portion of the man-made metal microstructure extends from the first portion of the fracture point of the man-made metal microstructure on the first substrate. The super material radio frequency antenna according to claim 4, wherein the first substrate is further provided with a first metallized through hole and a second metalized through hole, and the first metalized through hole has two ends Corresponding to the man-made metal microstructure a portion of the fracture end and a second portion of the artificial metal microstructure fracture end, the second metallization via having two ends corresponding to the first portion of the feed line and the second end of the feed line a first portion of the man-made metal microstructure and a second portion of the man-made metal microstructure are electrically connected by the first metallized via, a first portion of the feed line and a second portion of the feed line The second metallized via is electrically connected. The metamaterial radio frequency antenna according to claim 4, wherein a side surface of the first substrate is provided with a first connecting portion and a second connecting portion, and both ends of the first connecting portion correspond to the artificial a first portion of the metal microstructure and a second portion of the fracture point of the man-made metal microstructure, the second portion of the second portion corresponding to the first portion of the feed line and the second end of the feed line a portion of the fracture end; the first portion of the man-made metal microstructure and the second portion of the man-made metal microstructure are electrically connected by the first connection, the first portion of the feed line and the two portions of the feed line The second connection portion is electrically connected. The metamaterial radio frequency antenna according to claim 2, wherein the topological pattern of the man-made metal microstructure 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. The metamaterial radio frequency antenna according to claim 1, wherein the substrate comprises a first surface and a second surface opposite to the first surface, wherein the first surface of the substrate is attached a first portion of the man-made metal microstructure and a first portion of the feed line, a second surface of the substrate attached There is a second portion of the man-made metal microstructure and a second portion of the feed line. The metamaterial radio frequency antenna according to claim 8, wherein the first portion of the fracture point of the man-made metal microstructure and the first portion of the fracture end of the feed line are respectively opposite to the second portion of the man-made metal microstructure The partial break end and the second partial break end of the feed line are electrically connected. The metamaterial radio frequency antenna of claim 9, wherein the second portion of the man-made metal microstructure breaks from a second portion of the man-made metal microstructure at a second surface of the substrate The direction of the upper extension coincides with the direction in which the first portion of the man-made metal microstructure extends from the first portion of the fracture end of the man-made metal microstructure on the first surface of the substrate. The super material radio frequency antenna according to claim 10, wherein the substrate is further provided with a first metallized through hole and a second metallized through hole, wherein the two ends of the first metallized through hole correspond to a first portion of the fracture point of the man-made metal microstructure and a second portion of the fracture point of the man-made metal microstructure, and the two ends of the second metallization hole correspond to a first portion of the fracture end of the feed line a second portion of the fracture line of the feed line; a first portion of the man-made metal microstructure and a second portion of the man-made metal microstructure are electrically connected by the first metallized via, the first portion of the feed line The second portion of the feed line is electrically connected through the second metallized via. The metamaterial radio frequency antenna according to claim 10, wherein a side surface of the substrate is provided with a first connecting portion and a second connecting portion, and the two ends of the first connecting portion correspond to the artificial metal micro a first portion of the fracture end of the structure and a second portion of the fracture point of the man-made metal microstructure, the second portion of the second connection portion corresponding to a fracture of the first portion of the feed line and a second portion of the feed line An end point; the first portion of the man-made metal microstructure and the person A second portion of the metal-forming microstructure is electrically connected by the first connection, the first portion of the feed line and the second portion of the feed line being electrically connected by the second connection. The metamaterial radio frequency antenna according to claim 8, wherein the topological pattern of the man-made metal microstructure 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. The metamaterial radio frequency antenna according to claim 1, wherein the substrate is made of ceramic, high molecular polymer, ferroelectric material, ferrite material or ferromagnetic material. The metamaterial radio frequency antenna according to claim 1, wherein the cross-sectional pattern of the substrate is circular, elliptical or polygonal. A method for preparing a metamaterial radio frequency antenna, wherein: the preparation method comprises the following steps: S1: fabricating a substrate; S2: attaching a desired metal branch to the surface of the substrate; and S3: electrically connecting the surface of the substrate The metal branch; wherein the step S3 comprises: S311: forming a through hole on the substrate by a numerically controlled drilling machine drilling, a numerically controlled punch punching or a laser drilling method at the end of the metal branch that requires electrical connection; S312: Liquid metal is filled in the through holes by screen printing, mask printing, or through-hole casting. According to the preparation method of claim 16, wherein In the step S1 to the step S3, the substrate is a ceramic substrate. The preparation method according to claim 17, wherein the step S1 specifically comprises: S11: mixing an organic vehicle and a glass ceramic powder; and S12: flow casting. The preparation method according to claim 17, wherein the preparation method further comprises the step S4: pressing the plurality of the substrates into one body. The production method according to claim 19, wherein the preparation method further comprises a step S5 of sintering a plurality of the substrates integrally pressed in the step S4. The production method according to claim 20, wherein the sintering temperature is lower than 1000 degrees in the step S5.