TWI847731B - Dual-polarization cavity-backed antenna, a package module, and an array package module - Google Patents

Abstract

The invention relates to a dual-polarization cavity-backed antenna, a package module, and an array package module, including a substrate, a magnetic current feeding structure, a current feeding structure, and a cavity. The cavity is arranged between the two sides of the substrate part. The magnetic current feeding structure and the current feeding structure transfer energy into the cavity. So that the magnetic current feeding structure radiates the first electromagnetic wave in the cavity, and the current feeding structure radiates the second electromagnetic wave in the cavity. The electric field direction of the first electromagnetic wave and the magnetic field direction of the second electromagnetic wave occur on the same plane. The polarization directions of the first electromagnetic wave and the second electromagnetic wave are orthogonal. The packaged module includes the dual-polarized cavity-backed antenna, a radio frequency control chip, and a control circuit unit. The array packaged module includes a plurality of dual-polarized cavity-backed antennas, a radio frequency control chip, and a control circuit unit.

Description

Dual-polarization cavity-backed antenna and its packaging module and array packaging module

The present invention relates to an antenna, and in particular to a dual-polarization cavity-backed antenna and a packaging module and an array packaging module thereof.

The rapid development of wireless communication technology has brought many challenging problems to various aspects of wireless communication design. For example, in antenna design, Taiwan Invention Patent No. I481115 (patent prior application) proposed an antenna unit and antenna array module, which improved the problems of traditional back-chamber antennas such as small bandwidth, excessive reverse radiation, and unnecessary surface wave radiation. However, the patent prior application only provides a single input source and electromagnetic waves in a single polarization direction, and does not take into account the dual-polarization design problem.

Therefore, how to achieve high isolation and eliminate external interference at the same level in the same plane under this back chamber antenna architecture with dual input sources and dual polarization design requirements will be a problem that needs to be solved urgently.

In view of the problems of the prior art, the purpose of the present invention is to provide a dual-polarization cavity-backed antenna, which can be further integrated with radio frequency components into a package module, and can achieve the purposes of high isolation of broadband, broadband, isolation from environmental interference and single-direction radiation.

According to the purpose of the present invention, a dual-polarization back cavity antenna is provided, including a substrate part, a magnetic current feeding structure, an electric current feeding structure and a back cavity chamber, wherein the substrate part has a first surface and a second surface opposite to each other, the first surface is provided with a first metal layer, the second surface of the substrate part is provided with a second metal layer, the second metal layer is provided with a radiation opening, a plurality of first conductive through holes are provided around the outer periphery of the radiation opening between the two surfaces of the substrate part, and the plurality of first conductive through holes electrically connect the first metal layer and the second metal layer to form a back cavity chamber. The magnetic current feeding structure is provided on the second surface, and the magnetic current feeding structure feeds the radiation opening with a magnetic current, so that the radiation opening radiates a first electromagnetic wave in a first polarization direction. The current feeding structure is arranged on the second surface, and the current feeding structure feeds the radiation opening with current, so that the radiation opening radiates the second electromagnetic wave in the second polarization direction, and the second polarization direction is orthogonal to the first polarization direction. The magnetic current feeding structure and the current feeding structure jointly radiate the first electromagnetic wave and the second electromagnetic wave in the area surrounded by the back cavity, and the electric field direction of the first electromagnetic wave and the magnetic field direction of the second electromagnetic wave occur on the same plane.

The radiation opening is arranged on the second metal layer, so that the position of the second metal layer corresponding to the radiation opening is a hollow area, and the second surface of the substrate is exposed, and two corresponding sides of the radiation opening are respectively the first side and the second side.

The magnetic flux feeding structure includes a coupling opening, a crossing opening and a first conductor. The coupling opening is arranged at a position of the second surface adjacent to the first side. The position of the second metal layer corresponding to the coupling opening is a hollow area, and the second surface of the substrate is exposed. One end of the coupling opening is connected to the first side, and the other end of the coupling opening extends in a direction away from the radiation opening. The crossing opening is arranged at a position between the two ends of the second surface crossing the coupling opening, so that the position of the second metal layer corresponding to the crossing opening is a hollow area, and the second surface of the substrate is exposed. The first conductor is arranged in the spanning opening and passes through the two ends of the coupling opening. The first conductor receives and transmits a first feed source, so that the first feed source is coupled to the coupling opening and transmitted to the radiation opening through the coupling opening, so as to radiate a first electromagnetic wave in the form of a magnetic current at the edge of the radiation opening.

One end of the crossing opening is located through the coupling opening, and the other end of the crossing opening extends to the area of the second surface outside the back cavity until the edge of the substrate portion. The first conductor is a first metal transmission line, which extends from one end of the crossing opening to the other end of the crossing opening, and extends along the side surface of the substrate portion to a first feed source receiving port provided on the first surface to receive the first feed source.

One end of the crossing opening is located through the coupling opening, and the other end of the crossing opening extends to an area of the second surface outside the back cavity. The first conductor is a first metal transmission line, and the first metal transmission line is arranged in the crossing opening. The substrate part is provided with a second conductive metal hole at a position of the crossing opening outside the back cavity relative to the first metal transmission line. One end of the second conductive metal hole is connected to the first metal transmission line, and the other end of the second conductive metal hole is connected to a first feed source receiving port arranged on the first surface to receive the first feed source.

The current feeding structure includes a channel opening and a second conductor. The channel opening is arranged at a position adjacent to the second side on the second surface. One end of the channel opening is connected to the radiation opening, and one end of the channel opening is opposite to one end of the coupling opening, while the other end of the channel opening extends toward a position outside the radiation opening. The second conductor is arranged at a position on the second surface located within the radiation opening and the channel opening and separated from the second side by a distance. The second conductor receives and transmits a second feeding source to the radiation opening. The second conductor radiates a second electromagnetic wave in the radiation opening as a current.

The other end of the channel opening extends to the edge of the substrate portion, the second conductor is a second metal transmission line and a third metal transmission line, the second metal transmission line is arranged in the radiation opening, the third metal transmission line is connected to the second metal transmission line from one end of the channel opening, the other end of the third metal transmission line extends to the other end of the channel opening, extends to the edge of the second surface, and then extends along the side of the substrate portion to a second feed source receiving port arranged on the first surface to receive the second feed source.

The other end of the channel opening extends to a position outside the back cavity of the substrate portion, the second conductor is a second metal transmission line, a third metal transmission line and a third conductive metal hole, the second metal transmission line is arranged in the radiation opening, the third metal transmission line is connected to the second metal transmission line from one end of the channel opening, the other end of the third metal transmission line extends to the other end of the channel opening, the third conductive metal hole penetrates the substrate portion, and one end of the third conductive metal hole is connected to the third metal transmission line, and the other end of the third conductive metal hole is connected to a second feed source receiving port arranged on the first surface to receive the second feed source.

According to the purpose of the present invention, a packaging module is provided, such as the aforementioned dual-polarization back-cavity antenna, radio frequency control unit and control circuit unit, the radio frequency control unit is provided with a plurality of first conductive blocks, the plurality of first conductive blocks are connected to the dual-polarization back-cavity antenna, the control circuit unit is provided with a plurality of second conductive blocks, the plurality of second conductive blocks are connected to the dual-polarization back-cavity antenna, wherein two of the plurality of first conductive blocks or two of the first conductive blocks of the plurality of second conductive blocks are respectively a first feed source output port and a second feed source output port, the first feed source output port is connected to the first feed source, and the second feed source output port is connected to the second feed source.

According to the purpose of the present invention, an array packaging module is provided. The difference between the packaging module and the array packaging module is that the array packaging module includes a plurality of dual-polarization cavity-back antennas, and the RF control unit is an RF chip or a plurality of RF chips, so that a single RF chip is connected to a plurality of dual-polarization cavity-back antennas to control the plurality of dual-polarization cavity-back antennas, or the RF control unit is a plurality of RF chips, each RF chip is connected to one of the plurality of dual-polarization cavity-back antennas, so that each RF chip individually controls the connected dual-polarization cavity-back antenna.

In summary, since the magnetic current feeding structure generates the first electromagnetic wave on the second surface by magnetic current radiation, and the electric current feeding structure also generates the second electromagnetic wave on the second surface by electric current radiation, the interference of the electric field and the magnetic field between the first electromagnetic wave and the second electromagnetic wave is avoided, thereby improving the isolation between the first electromagnetic wave and the second electromagnetic wave. In addition, the back cavity isolates the interference of the environment on the first electromagnetic wave and the second electromagnetic wave, and the back cavity constrains the first electromagnetic wave and the second electromagnetic wave to radiate in a single direction into space. In this way, when the package module composed of the dual-polarized back cavity antenna, the radio frequency control unit and the control circuit unit is formed, the first electromagnetic wave and the second electromagnetic wave can be effectively propagated outward.

The embodiments of the present invention will be further explained below in conjunction with the relevant drawings. As much as possible, the same reference numerals in the drawings and the specification represent the same or similar components. In the drawings, the shapes and thicknesses may be exaggerated for the sake of simplicity and convenience. It is understood that the components not specifically shown in the drawings or described in the specification are of a form known to those skilled in the art. Those skilled in the art can make various changes and modifications based on the content of the present invention.

Unless otherwise specified in this article, the use of ordinal adjectives such as "first", "second", "third", etc. to describe a common object is only to indicate that the objects referred to are different entities of similar objects, and are not intended to imply that the objects so described must be arranged in a specific order in time or space or have any other kind of order relationship.

As shown in FIG1 , the present invention is a dual-polarization back cavity antenna, comprising a substrate portion 1, a magnetic current feeding structure 2, an electric current feeding structure 3 and a back cavity chamber 4, wherein the substrate portion 1 can be a dielectric material, such as a printed circuit board. The substrate portion 1 has a first surface 10 and a second surface 12 opposite to each other, and the first surface 10 is provided with a first metal layer 100, and the first metal layer 100 can be a copper foil or other conductive metal. The second surface 12 of the substrate portion 1 is provided with a second metal layer 120, and the second metal layer 120 is provided with a radiation opening 14, so that the position of the second metal layer 120 corresponding to the radiation opening 14 is a hollow area, and the second surface 12 is exposed, and two corresponding sides of the radiation opening 14 are respectively a first side 140 and a second side 142. A plurality of first conductive through holes 16 are disposed between two surfaces of the substrate portion 1 and around the radiation opening 14 . The plurality of first conductive through holes 16 electrically connect the first metal layer 100 and the second metal layer 120 to form a back chamber 4 .

As shown in FIGS. 2 to 4 , a water drop-like shape drawn in FIG. 4 represents a single radiation direction. In the present invention, the magnetic current feeding structure 2 and the electric current feeding structure 3 are both arranged on the second surface 12. The magnetic current feeding structure 2 and the electric current feeding structure 3 are jointly excited in the back chamber 4, so that the magnetic current feeding structure 2 feeds the radiation opening 14 with the magnetic current, so that the radiation opening 14 radiates a first electromagnetic wave in a first polarization direction, and the electric current feeding structure 3 feeds the radiation opening 14 with the current, so that the radiation opening 14 radiates a second electromagnetic wave in a second polarization direction, and the second polarization direction is orthogonal to the first polarization direction. In this way, the radiation energy conversion phase difference of the different resonance mechanisms of the current feeding structure 3 and the magnetic current feeding structure 2 is utilized to achieve the coexistence characteristics of low coupling/low correlation between the high-integration antennas of the same operating frequency band, so that the first electromagnetic wave radiated by the magnetic current feeding structure 2 and the second electromagnetic wave radiated by the current feeding structure 3 have good isolation. In addition, since the back chamber 4 surrounds the radiation opening 14, the back chamber 4 can isolate the interference of the surrounding environment on the first electromagnetic wave and the second electromagnetic wave. At the same time, the first surface 10 constrains the first electromagnetic wave and the second electromagnetic wave to a single radiation direction, so that the first electromagnetic wave and the second electromagnetic wave can effectively propagate outward.

Please refer to FIG. 2 again. In some embodiments of the present invention, the magnetic flux feeding structure 2 includes a coupling opening 20, a crossing opening 22 and a first conductor 24. The coupling opening 20 is disposed at a position of the second surface 12 adjacent to the first side 140. The position of the second metal layer 120 corresponding to the coupling opening 20 is a hollow area, and the second surface 12 is exposed. One end of the coupling opening 20 is connected to the first side 140, and the other end of the coupling opening 20 extends in a direction away from the radiation opening 14. The crossing opening 22 is disposed at a position of the second surface 12 between the two ends crossing the coupling opening 20, so that the position of the second metal layer 120 corresponding to the crossing opening 22 is a hollow area, and the second surface 12 is exposed. The first conductor 24 is disposed in the spanning opening 22 and passes between the two ends of the coupling opening 20. The first conductor 24 receives and transmits the first feed source, so that the first feed source is coupled to the coupling opening 20 and transmitted to the radiation opening 14 through the coupling opening 22, so that the radiation opening 14 radiates the first electromagnetic wave in the form of magnetic current.

Furthermore, the current feeding structure 3 includes a channel opening 30 and a second conductor 32. The channel opening 30 is disposed at a position adjacent to the second side 142 of the second surface 12. One end of the channel opening 30 communicates with the radiation opening 14, and one end of the channel opening 30 is opposite to one end of the coupling opening 20, while the other end of the channel opening 30 extends toward a position outside the radiation opening 14. The second conductor 32 is disposed at a position on the second surface 12 located within the radiation opening 14 and the channel opening 30, and spaced apart from the second side 142 by a distance. The second conductor 32 receives and transmits the second feeding source to the radiation opening 14, and the second conductor 32 radiates a second electromagnetic wave in the radiation opening as a current. It should be noted that the radiation opening 14, the coupling opening 20, the crossing opening 22, the first conductor 24, the channel opening 30 and the second conductor 32 can be formed by etching the second metal layer 120 that originally covers the entire second surface 12, but the actual implementation of the present invention is not limited thereto.

First embodiment of the present invention

Please refer to FIG. 2 and FIG. 3 , one end of the crossing opening 22 is located through the coupling opening 20, and the other end of the crossing opening 22 extends to the area of the second surface 12 outside the back chamber 4, until the edge of the substrate portion 1. The first conductor 24 is a first metal transmission line, and the first metal transmission line extends from one end of the crossing opening 22 to the other end of the crossing opening 22, and extends along the side surface of the substrate portion 1 to a first feed source receiving port provided on the first surface 10 to receive the first feed source.

Furthermore, the other end of the channel opening 30 extends to the edge of the substrate portion 1, and the second conductor 32 is a second metal transmission line 320 and a third metal transmission line 322. The second metal transmission line 320 is arranged in the radiation opening 14, and the third metal transmission line 322 is connected to the second metal transmission line 320 from one end of the channel opening 30. The other end of the third metal transmission line 322 extends to the other end of the channel opening 30 and extends to the edge of the second surface 12, and then extends along the side of the substrate portion 1 to a second feed source receiving port provided on the first surface 10 to receive the second feed source.

Second embodiment of the present invention

Please refer to Figure 5. One end of the crossing opening 22 is located through the coupling opening 20, and the other end of the crossing opening 22 extends to the area of the second surface 12 outside the back chamber 4. The first conductor 24 is a first metal transmission line, and the first metal transmission line is arranged in the crossing opening 22. The substrate part 1 is provided with a second conductive metal hole 26 at a position of the crossing opening 22 outside the back chamber 4 relative to the first metal transmission line. One end of the second conductive metal hole 26 is connected to the first metal transmission line, and the other end of the second conductive metal hole is connected to the first feed source receiving port provided on the first surface 10 to receive the first feed source.

In this embodiment, the other end of the channel opening 30 extends to a position outside the back chamber 3 of the substrate portion 1, and the second conductor 32 is a second metal transmission line 320, a third metal transmission line 322 and a third conductive metal hole 324. The second metal transmission line 320 is arranged in the radiation opening 14, and the third metal transmission line 322 is connected to the second metal transmission line 320 from one end of the channel opening 30, and the other end of the third metal transmission line 322 extends to the other end of the channel opening 30. The third conductive metal hole 324 passes through the substrate portion 1, and one end of the third conductive metal hole 324 is connected to the third metal transmission line 322, and the other end of the third conductive metal hole 324 is connected to a second feed source receiving port provided on the first surface 10 to receive the second feed source.

In the above two embodiments, the second metal transmission line 320 and the third metal transmission line 322 are T-shaped, but the present invention is not limited to this in actual implementation. In addition, in actual implementation of the present invention, the structures of the current feeding structure 3 and the magnetic current feeding structure 2 are not limited to the two antenna feeding structures in the above embodiments. Any structure that can generate electromagnetic waves that generate current feeding and magnetic current feeding respectively on the same plane is within the scope of the present invention.

Please refer to Figures 5 and 6. The present invention is a packaging module, including an RF control unit 5, a control circuit unit 6 and the aforementioned dual-polarization back-cavity antenna. The RF control unit 5 is provided with a plurality of first conductive blocks 50, and the plurality of first conductive blocks 50 are connected to the dual-polarization back-cavity antenna. The control circuit unit 6 is provided with a plurality of second conductive blocks 60, and the plurality of second conductive blocks 60 are connected to the dual-polarization back-cavity antenna. Two of the plurality of first conductive blocks 50 or two of the plurality of second conductive blocks 60 are respectively a first feed source output port and a second feed source output port. The first feed source output port is connected to the first feed source, and the second feed source output port is connected to the second feed source. It can be seen that the dual-polarized cavity-backed antenna of the present invention can be easily combined with the RF control unit 5 (such as RF control chip) and the control circuit unit 6 (such as circuit board) of the electronic device, and is suitable for mass production. FIG6 shows a water drop shape representing a single radiation direction.

Please refer to FIG7 , where a water drop-like shape is drawn to represent a single radiation direction. The present invention is a package module, comprising an RF control unit 5, a control circuit unit 6, a carrier 7 and the aforementioned dual-polarization back cavity antenna, wherein the RF control unit 5 is provided with a plurality of first conductive blocks 50, the plurality of first conductive blocks 50 are connected to the carrier 7, the control circuit unit 6 is provided with a plurality of second conductive blocks 60, the plurality of second conductive blocks 60 are connected to the carrier 7, the carrier 7 is provided with a plurality of third conductive blocks 70, two of the plurality of third conductive blocks 70 are respectively a first feed source output port and a second feed source output port, the first feed source output port is connected to the first feed source, and the second feed source output port is connected to the second feed source. It can be seen that the dual-polarization cavity-backed antenna of the present invention can be connected to the RF control unit 5 and the control circuit unit 6 via the carrier 7, and signals can be transmitted between the carrier 7, the RF control unit 5 and the control circuit unit 6.

Please refer to Figure 8. The present invention is an array packaging module. The difference between the packaging module and the array packaging module is that the array packaging module includes a plurality of dual-polarization cavity-back antennas, and the RF control unit 5 is an RF chip or a plurality of RF chips, so that a single RF chip is connected to a plurality of dual-polarization cavity-back antennas to control the plurality of dual-polarization cavity-back antennas (as shown in Figure 9), or the RF control unit 5 is a plurality of RF chips, each RF chip is connected to one of the plurality of dual-polarization cavity-back antennas, so that each RF chip controls the connected individual dual-polarization cavity-back antenna (as shown in Figure 10).

Please refer to FIG. 11, which is a frequency and reflection loss relationship diagram of the dual-polarization cavity-backed antenna of the present invention, wherein S11 is the frequency and reflection loss relationship curve of the current feeding structure, S22 is the frequency and reflection loss relationship curve of the magnetic current feeding structure, and S21 is the isolation relationship curve between the current feeding structure and the magnetic current feeding structure. From S11 and S22, it can be seen that the current feeding structure 3 and the magnetic current feeding structure 2 cover the 60 GHz ISM The frequency band is 57-64 GHz. From S21, it can be seen that the isolation between the current feeding structure 3 and the magnetic current feeding structure 2 is greater than 40 dB, indicating that the current feeding structure 3 and the magnetic current feeding structure 2 of the present invention have a good wide-band isolation effect, and the signal interference between the two is extremely low.

In summary, since the magnetic current feeding structure 2 and the electric current feeding structure 3 generate the first electromagnetic wave and the second electromagnetic wave on the second surface 12 in different radiation modes, the isolation between the first electromagnetic wave and the second electromagnetic wave is improved, and the interference problem between the first electromagnetic wave and the second electromagnetic wave is solved. In addition, the back cavity chamber 4 isolates the first electromagnetic wave and the second electromagnetic wave from the interference of the environment, and constrains the first electromagnetic wave and the second electromagnetic wave to radiate into space in a single direction. In this way, when the dual-polarized back cavity antenna is packaged into a module composed of the radio frequency control unit 5 and the control circuit unit 6, the first electromagnetic wave and the second electromagnetic wave can be effectively propagated outward, and the dual-polarized back cavity antenna can be easily combined with the radio frequency control unit 5 and the control circuit unit 6, making the present invention suitable for mass production.

The above is only an example to illustrate the preferred implementation of the present invention, and is not intended to limit the scope of implementation. All simple substitutions and equivalent changes made according to the scope of the patent application of the present invention and the content of the patent specification are within the scope of the patent application of the present invention.

1: substrate part 10: first surface 100: first metal layer 12: second surface 120: second metal layer 14: radiation opening 140: first side 142: second side 16: first conductive through hole 2: magnetic current feeding structure 20: coupling opening 22: crossing opening 24: first conductor 26: second conductive metal hole 3: current feeding structure 30: channel opening 32: second conductor 320: second metal transmission line 322: third metal transmission line 324: third conductive metal hole 4: back cavity 5: RF control unit 50: first conductive block 6: control circuit unit 60: Second conductive block 7: Carrier 70: Third conductive block

FIG1 is a three-dimensional schematic diagram of one embodiment of the dual-polarized cavity-back antenna of the present invention; FIG2 is a top view of FIG1 with the back cavity omitted; FIG3 is a bottom view of FIG1; FIG4 is a cross-sectional schematic diagram of FIG1; FIG5 is a three-dimensional schematic diagram of a packaging module; FIG6 is a cross-sectional schematic diagram of a packaging module; FIG7 is a cross-sectional schematic diagram of another packaging module; FIG8 is a three-dimensional schematic diagram of an array packaging module; FIG9 is a top view of one embodiment of an array packaging module; FIG10 is a top view of another embodiment of an array packaging module; FIG11 is a schematic diagram of the relationship between reflection loss and frequency of the dual-polarized cavity-back antenna.

1: Base material part

10: First page

100: First metal layer

12: Second side

120: Second metal layer

14: Radiation opening

140: First side

142: Second side

16: First conductive through hole

2: Magnetic flux feeding structure

20: Coupling opening

22: Cross the opening

24: First conductor

3: Current feeding structure

30: Channel opening

32: Second conductor

4: Back chamber

6: Control circuit unit

Claims (10)

A dual-polarization cavity-backed antenna, comprising: A substrate portion, the substrate portion having a first surface and a second surface opposite to each other, wherein the first surface is provided with a first metal layer, the second surface of the substrate portion is provided with a second metal layer, the second metal layer is provided with a radiation opening, the position of the second metal layer corresponding to the radiation opening is a hollow area, and the second surface is exposed, and two corresponding sides of the radiation opening are respectively a first side and a second side; A back chamber, the back chamber is formed by a plurality of first conductive through holes, the first metal layer and the second metal layer, the plurality of first conductive through holes are arranged between the first metal layer and the second metal layer and surround the outer periphery of the radiation opening, the plurality of first conductive through holes are electrically connected to the first metal layer and the second metal layer; A magnetic current feeding structure, arranged on the second surface, the magnetic current feeding structure feeds the radiation opening with a magnetic current, so that the radiation opening radiates a first electromagnetic wave in a first polarization direction; and A current feeding structure is arranged on the second surface, and the current feeding structure feeds the radiation opening with current to make the radiation opening radiate a second electromagnetic wave in a second polarization direction, and the second polarization direction is orthogonal to the first polarization direction; wherein the magnetic current feeding structure and the current feeding structure jointly radiate the first electromagnetic wave and the second electromagnetic wave in the back chamber, and the electric field direction of the first electromagnetic wave and the magnetic field direction of the second electromagnetic wave occur on the same plane, and the back chamber isolates the first electromagnetic wave and the second electromagnetic wave from the interference of the environment, and the first metal layer constrains the first electromagnetic wave and the second electromagnetic wave to radiate into space in a single direction. The dual-polarized cavity-backed antenna as described in claim 1, wherein the magnetic current feeding structure comprises: a coupling opening, the coupling opening is arranged at a position where the second surface is adjacent to the first side, the position of the second metal layer corresponding to the coupling opening is a hollow area, and the second surface is exposed, and one end of the coupling opening is connected to the first side, and the other end of the coupling opening extends in a direction away from the radiation opening; a crossing opening, arranged at a position where the second surface crosses the two ends of the coupling opening, the position of the second metal layer corresponding to the crossing opening is a hollow area, and the second surface is exposed; and a first conductor, arranged in the substrate portion in the crossing opening, and passing through the two ends of the coupling opening; The first conductor receives and transmits a first feed source, so that the first feed source is coupled to the coupling opening, and transmitted to the radiation opening through the coupling opening, so as to radiate the first electromagnetic wave in the radiation opening as a magnetic current. A dual-polarization back cavity antenna as described in claim 2, wherein one end of the spanning opening passes between the two ends of the coupling opening, and the other end of the spanning opening extends to the area of the second surface outside the back cavity until the edge of the substrate portion, and the first conductor is a first metal transmission line, which extends from one end of the spanning opening to the other end of the spanning opening and extends along the side surface of the substrate portion to a first feed source receiving port provided on the first surface to receive the first feed source. A dual-polarization back cavity antenna as described in claim 2, wherein one end of the crossing opening passes between the two ends of the coupling opening, and the other end of the crossing opening extends to the area of the second surface outside the back cavity chamber, the first conductor is a first metal transmission line, and the first metal transmission line is arranged in the crossing opening, and the substrate portion is provided with a second conductive metal hole at a position of the crossing opening outside the back cavity relative to the first metal transmission line, one end of the second conductive metal hole is connected to the first metal transmission line, and the other end of the second conductive metal hole is connected to a first feed source receiving port provided on the first surface to receive the first feed source. The dual-polarized cavity-backed antenna as described in claim 2, wherein the current feeding structure includes: a channel opening, which is arranged at a position of the second surface adjacent to the second side, the position of the second metal layer corresponding to the channel opening is a hollow area, and the second surface is exposed, one end of the channel opening is connected to the radiation opening, and one end of the channel opening is opposite to one end of the coupling opening, and the other end of the channel opening extends toward a position outside the radiation opening; and a second conductor, which is arranged on the second surface and is located within the radiation opening and the channel opening, and the second conductor is separated from the second side by a distance, the second conductor receives and transmits a second feeding source to the radiation opening, and the second conductor radiates the second electromagnetic wave in the radiation opening as a current. A dual-polarized cavity-backed antenna as described in claim 5, wherein the other end of the channel opening extends to the edge of the substrate portion, the second conductor is a second metal transmission line and a third metal transmission line, the second metal transmission line is arranged in the radiation opening, the third metal transmission line is connected to the second metal transmission line from one end of the channel opening, the other end of the third metal transmission line extends to the other end of the channel opening and to the edge of the second surface, and then extends along the side of the substrate portion to a second feed source receiving port provided on the first surface to receive the second feed source. A dual-polarized back cavity antenna as described in claim 5, wherein the other end of the channel opening extends to a position of the substrate portion outside the back cavity, the second conductor is a second metal transmission line, a third metal transmission line and a third conductive metal hole, the second metal transmission line is arranged in the radiation opening, the third metal transmission line is connected to the second metal transmission line from one end of the channel opening, the other end of the third metal transmission line extends to the other end of the channel opening, the third conductive metal hole penetrates the substrate portion, and one end of the third conductive metal hole is connected to the third metal transmission line, and the other end of the third conductive metal hole is connected to a second feed source receiving port arranged on the first surface to receive the second feed source. A package module, comprising: The dual-polarization cavity-backed antenna as described in claim 5; An RF control unit, the RF control unit having a plurality of first conductive blocks; and A control circuit unit, the control circuit unit having a plurality of second conductive blocks; Wherein, two of the plurality of first conductive blocks or two of the plurality of second conductive blocks are respectively a first feed source output port and a second feed source output port, the first feed source output port is connected to the first feed source, and the second feed source output port is connected to the second feed source. A package module, comprising: The dual-polarization cavity-backed antenna as described in claim 5; An RF control unit, the RF control unit having a plurality of first conductive blocks; A control circuit unit, the control circuit unit having a plurality of second conductive blocks; and A carrier, the carrier having a plurality of third conductive blocks, two of the plurality of third conductive blocks being a first feed source output port and a second feed source output port, respectively, the first feed source output port being connected to a first feed source, and the second feed source output port being connected to a second feed source; Wherein, the plurality of first conductive blocks are connected to the carrier, and the plurality of second conductive blocks are connected to the carrier. An array package module, comprising: A plurality of dual-polarization cavity-backed antennas as described in claim 5; A radio frequency control unit, the radio frequency control unit having a plurality of first conductive blocks; and A control circuit unit, the control circuit unit having a plurality of second conductive blocks; Wherein, two of the plurality of first conductive blocks or the plurality of second conductive blocks are respectively a first feed source output port and a second feed source output port, the first feed source output port is connected to the first feed source, and the second feed source output port is connected to the second feed source.

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