KR102414079B1 - Low profile dual polarization antenna - Google Patents

Abstract

The present invention is implemented in a hat shape extending in a predetermined direction on a substrate and one surface of the substrate, a portion of each of which is spaced apart from one surface of the substrate and proceeds in parallel, and two feeding probes each receiving a feeding signal and a feeding patch disposed at the same height as the top surfaces of the two feeding probes from one surface of the substrate and receiving a feeding signal from the two feeding probes according to a coupling feeding method, wherein the feeding patch is the top surface of the two feeding probes. It is possible to provide a dual polarization antenna capable of realizing a low profile by forming two first slots, each of which is spaced apart inside and inserted.

Description

Low profile dual polarization antenna

The present invention relates to a dual polarization antenna, and to a low profile dual polarization antenna.

Recently, various wireless communication systems require an antenna having a low height for a design robust to external environments such as wind pressure. That is, a low profile antenna is required. In particular, a height of 0.05λ or less is required in an RU + antenna combined system. Therefore, it is necessary to propose an antenna having a new structure by breaking away from the existing structure.

Korean Patent Registration No. 10-2125971 (Registered on June 17, 2020)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a low profile dual polarized antenna.

A dual polarization antenna according to an embodiment of the present invention for achieving the above object includes a substrate; Two feeding probes extending in a predetermined direction on one surface of the substrate, each of which is implemented in a hat shape, a portion of which is spaced apart from one surface of the substrate and proceeds in parallel, and receives a feeding signal, respectively; and a feeding patch disposed at the same height as the top surfaces of the two feeding probes from one surface of the substrate and receiving a feeding signal from the two feeding probes according to a coupling feeding method, wherein the feeding patch comprises the two Two first slots into which each of the top surfaces of the feeding probes are spaced apart and inserted therein are formed.

The two first slots may be formed in 45° and -45° directions corresponding to the two feeding probes formed to extend in 45° and -45° directions at predetermined positions on one surface of the substrate. .

The double polarization antenna has a shape corresponding to the shape of the two feed probes, and has two matching structures disposed on one surface of the substrate having positions and extension directions corresponding to the positions and extension directions of the two feed probes. may include more.

The dual polarization antenna further includes a support disposed between the substrate and the feed patch to fix the feed patch at a predetermined position spaced apart from the substrate by a different predetermined distance, the support including the two second Two first through-holes having positions and shapes corresponding to the positions and shapes of each of the slots and through which upper surfaces of the two feeding probes are inserted may be formed.

The dual polarization antenna may further include a radiation patch that is spaced apart from the feeding patch by a predetermined distance in the direction of one surface of the substrate and is fed by a coupling feeding method from the feeding patch.

The dual polarization antenna has a shape corresponding to the shape of the two feeding probes, two matching structures disposed on one surface of the substrate having positions and extension directions corresponding to the positions and extension directions of the two feeding probes; and a plurality of slits formed in the radiation patch and having shapes corresponding to the arrangement positions and extension directions of the two feeding probes and the two matching structures.

The feeding patch further includes two second slots extending in 45° and -45° directions corresponding to the position and extension direction of each of the two matching structures so that the top surfaces of the two matching structures are respectively spaced apart inside and inserted. can be formed.

In the radiation patch, a plurality of slits having shapes corresponding to the arrangement positions and extension directions of the two feeding probes and the two matching structures may be formed.

Each of the two feeding probes extends in a predetermined direction on one surface of the substrate, the feeding unit receiving a feeding signal; a first bending part having one end connected to the feeding part and extending in a vertical direction from the substrate; an upper smooth part having one end connected to the other end of the first bending part and extending parallel to one surface of the substrate to form an upper surface of the feeding probe; a second bending part having one end connected to the other end of the top smoothing part and extending perpendicular to the top smoothing part in the direction of the substrate; and a probe support part having one end connected to the other end of the second bending part on one surface of the substrate and extending again by a predetermined distance along an extension direction of the feeding part.

The dual polarization antenna may include a ground plane formed on the other surface of the substrate; and a reflective plate disposed to be spaced apart from the ground plane by a predetermined distance in the direction of the other surface of the substrate.

A dual polarization antenna according to another embodiment of the present invention for achieving the above object includes a substrate; While extending in a predetermined direction on one surface of the substrate, a portion of each is implemented in a hat shape that is spaced apart from the one surface of the substrate and proceeds in parallel, and 45° and -45° polarized signals are respectively used as feed signals. Two energized feed probes; It is spaced apart from one surface of the substrate by a predetermined distance, receives a feed signal from the two feed probes according to a coupling feed method, and has a position and an extension direction corresponding to the position and extension direction of the two feed probes. a feeding patch in which two first slots into which upper surfaces of the two feeding probes are inserted are formed; and a radiation patch disposed to be spaced apart from the feeding patch by a predetermined distance in the direction of one surface of the substrate, and fed by a coupling feeding method from the feeding patch to radiate a double polarized wave.

Therefore, the dual polarization antenna according to the embodiment of the present invention implements two feeding probes in a hat shape, and slots into which the top surfaces of the two hat feeding probes are respectively inserted are formed in the feeding patch, so that the feeding patch is separated from the substrate. A low profile can be realized by allowing the power to be fed according to the coupling feeding method while being disposed at the same height as the top surface of the feeding probe.

1 and 2 are exploded perspective views of a dual polarization antenna according to the present embodiment.
3 shows an assembly process of the dual polarization antenna according to the present embodiment.
4 and 5 are cross-sectional side views of the dual polarization antenna according to the present embodiment.
6 is a top view and a side view of a dual polarization antenna according to the present embodiment.
7 shows the return loss of the dual polarization antenna according to the present embodiment.
8 shows a horizontal radiation pattern of the dual polarization antenna according to the present embodiment.

In order to fully understand the present invention, the operational advantages of the present invention, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

Hereinafter, the present invention will be described in detail by describing preferred embodiments of the present invention with reference to the accompanying drawings. However, the present invention may be embodied in various different forms, and is not limited to the described embodiments. In addition, in order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals in the drawings indicate the same members.

Throughout the specification, when a part "includes" a certain component, it does not exclude other components, unless otherwise stated, meaning that other components may be further included. In addition, terms such as "...unit", "...group", "module", and "block" described in the specification mean a unit that processes at least one function or operation, which is hardware, software, or hardware. and a combination of software.

1 and 2 are exploded perspective views of the dual polarization antenna according to the present embodiment, FIG. 3 is an assembly process of the dual polarization antenna according to the present embodiment, and FIGS. 4 and 5 are the dual polarization antennas according to the present embodiment. A side cross-sectional view of the antenna is shown. And Figure 6 shows a top view and a side view of the dual polarization antenna according to the present embodiment.

1 to 6 , the dual polarization antenna according to the present embodiment includes a substrate 10 , two feed probes 21 and 22 , a feed patch 30 , and a radiation patch 40 .

The two feeding probes 21 and 22 are respectively formed to extend in a predetermined direction on one surface of the substrate 10 and receive a feeding signal. The two feeding probes 21 and 22 are formed to extend in a direction orthogonal to each other at a predetermined position on one surface of the substrate 10 . Here, as an example, the first feed probe 21 extends in a 45° direction, the second feed probe 22 extends in a -45° direction, and the first feed probe 21 feeds a 45° polarized signal. In response to the signal being applied, the second feeding probe 22 may receive a -45° polarized signal as a feeding signal. That is, FIGS. 1 to 6 show a dual slant polarization antenna.

" 형상)으로 구현된다.In this embodiment, each of the two feeding probes 21 and 22 extends in a predetermined direction on one surface of the substrate, and a part of each of them is spaced apart from one surface of the substrate and proceeds in parallel in a hat shape ("

"shape) is implemented.

Referring to the enlarged view of the first feeding probe 21 shown in FIG. 4 , the feeding probes 21 and 22 according to the present embodiment include a feeding part 310 , a first bending part 320 , and an upper smoothing part 330 . ), the second bending part 340 and the probe support part 350 may be divided. First, the power feeding unit 310 has a shape extending in a predetermined direction on one surface of the substrate 10 and receives a power feeding signal. Here, as an example, the power feeding unit 310 is illustrated as receiving a feeding signal through a corresponding feeding line 11 among the feeding lines 11 and 12 formed on one surface of the substrate 10, but the feeding unit 310 is It may be configured to receive the power supply signal in another way.

The first bending unit 320 having one end connected to the power feeding unit 310 is bent at a position connected to the power feeding unit 310 to extend in a vertical direction with respect to the substrate 10 . In addition, the upper smooth part 330 is formed in such a way that one end is bent at the other end of the first bending part 320 and is spaced apart from the substrate 10 by a predetermined height and extends in parallel. The second bending part 340 is bent at the other end of the upper smoothing part 330 to extend vertically in the direction of the substrate 10 , and the probe support part 350 includes the second bending part 340 extending from the substrate. It is bent at the position reaching 10 and is formed to extend by a predetermined distance along the extending direction of the power feeding unit 310 again. At this time, the probe support part 350 is not directly connected to the feed line 11 as shown in the enlarged view of FIG. 4 .

In addition, the dual polarization antenna of the present embodiment may further include two matching structures 23 and 24 having a structure symmetrical to the two feeding probes 21 and 22 . Two matching structures 23 and 24 are provided for impedance matching of the dual polarization antenna. The two matching structures 23 and 24 have a shape structure corresponding to the feeding probes 21 and 22, respectively, and are positioned on one surface of the substrate 10 in positions and extension directions corresponding to the two feeding probes 21 and 22. can be placed. That is, the two matching structures 23 and 24 may be formed to extend in a 45° direction and a -45° direction, respectively.

Each of the two matching structures 23 and 24 may include a feeding part, a first bending part, a top smoothing part, a second bending part, and a probe support part in the same way as the feeding probes 21 and 22 . However, since the matching structures 23 and 24 do not need to receive a feed signal unlike the feed probes 21 and 22 , the feed line is not connected to the feed part. Accordingly, in the matching structures 23 and 24, the feeding part may be implemented to have a shorter length than the feeding part 310 of the feeding probes 21 and 22, which is a structure in which the probe support parts are located at both ends instead of the feeding part. may be

On the other hand, the feed patch 30 transfers the feed signal applied from the two feed probes 21 and 22 in a coupling manner back to the radiation patch 40 in a coupling manner. In particular, a plurality of slots 31 and 32 are formed in the feeding patch 30 in this embodiment. Here, the first slot 31 is formed such that the upper surface of the feeding probes 21 and 22, that is, the upper smooth part 330 is inserted therein, and the second slot 32 is the upper end of the matching structures 23 and 24. The surface is formed to be inserted inside.

Here, each of the first and second slots 31 and 32 is a top smooth part so as not to come in direct contact with the top smooth part 330 constituting the top surfaces of the feeding probes 21 and 22 and the matching structures 23 and 24 , respectively. Formed to be larger than 330, the upper smooth portion 330 may be inserted so as to be spaced apart from each other by a predetermined distance or more from the inside of the first and second slots 31 and 32.

In this way, a plurality of slots 31 and 32 are formed in the feeding patch 30, so that the feeding probes 21 and 22 and the upper smooth portion 330 of the matching structures 23 and 24 correspond to the slots 31 and 32. As it can be inserted into the inside of, as shown in FIGS. 4 and 5, the feeding patch 30 in this embodiment is the top surface height of the feeding probes 21 and 22 from one side of the substrate 10, That is, it may be disposed parallel to the upper smooth part 330 . This is in spite of the fact that the feeding patch 30 receives a feeding signal from the feeding probes 21 and 22 in a coupling feeding method, the feeding patch 30 is placed between the feeding probes 21 and 22 and the radiation patch 40 . Do not require additional height for positioning. In other words, it is possible to reduce the height of the dual polarization antenna to realize a low profile.

In addition, the radiation patch 40 is disposed to be spaced apart from the feed patch 30 by a predetermined distance in the direction of one surface of the substrate 10 . The radiation patch 40 receives a feed signal from the feed patch 30 in a coupling feed method and radiates a signal corresponding to the applied feed signal. In this case, the radiation patch 40 may further have slits 41 having various patterns for improving radiation characteristics. Here, a case in which the plurality of slits 41 are formed in a direction in which the feeding probes 21 and 22 and the matching structures 23 and 24 extend respectively is illustrated. However, the slits 41 formed in the radiation patch 40 may have various patterns.

Meanwhile, the ground plane 14 may be formed on the other surface of the substrate 10 . In addition, the reflective plate 50 may be further disposed in close contact with the other surface of the substrate 10 or spaced apart from the other surface by a predetermined distance.

Additionally, in the dual polarization antenna according to this embodiment, the feed patch 30 and the radiation patch 40 may further include a support 60 to be stably disposed at a position spaced apart from the substrate 10 by a predetermined distance, respectively. have. The support 60 may be disposed on one surface of the substrate 10 . That is, the support 60 may be positioned between the substrate 10 and the feeding patch 30 . The support 60 may be coupled to one surface of the substrate 10 using the substrate coupling part 66, and the upper smooth part 330 of the feeding probes 21 and 22 and the matching structures 23 and 24 is the support. A plurality of through-holes (61, 62) are formed so as to protrude through one surface of the feeding patch (60) in the direction of (60). Here, the two first through-holes 61 are formed in a pattern corresponding to the two first slots 31 , and the two second through-holes 62 are formed in a pattern corresponding to the two second slots 32 . In this case, the thickness of the support 60 is the feeding probes 21 and 22 mounted on one surface of the support 60 and the smooth upper end of the matching structures 23 and 24 and the feeding patch 30. It may be set to be arranged in parallel. That is, the support 60 may have a thickness corresponding to the lengths of the first and second bending portions 330 and 340 of the feeding probes 21 and 22 .

In addition, a plurality of feeding patch coupling protrusions 63 protruding in the direction of the radiation patch 40 from one surface of the support body may be formed on the support 60 so that the feed patch 30 is stably mounted and fixed. Here, as an example, a plurality of feeding patch coupling protrusions 63 are illustrated as being implemented in a triangular prism shape at the four corners of the support 60, and in response to this, the four corners of the feeding patch 30 are also fed patch coupling protrusions 63. It is shown that the cut corresponding to the shape of the feed patch coupling portion 34 is formed. However, this is for the convenience of manufacturing, and the feeding patch coupling protrusion 63 and feeding patch coupling part 34 may be formed in various shapes in which the feeding patch 30 is mounted and fixed to the support 60 .

In addition, a radiation patch coupling protrusion 64 may be further formed on the upper surface of each of the plurality of feeding patch coupling protrusions 63 of the support 60 . As described above, the radiation patch 40 should be spaced apart from the feed patch 30 by a predetermined distance. Accordingly, a radiation patch coupling protrusion 64 is further formed on the top surface of each of the plurality of feeding patch coupling protrusions 63 , and a plurality of radiating patches are formed in the radiation patch 40 at positions corresponding to the plurality of radiation patch coupling projections 64 . A patch coupling hole 42 is formed. Here, each of the plurality of feeding patch coupling protrusions 63 is inserted into the corresponding radiation patch coupling hole 42, so that the radiation patch 40 is coupled and fixed. At this time, the feeding patch 30 is arranged in close contact with one surface of the support 60 along the side of the plurality of feeding patch coupling protrusions 63 , and the radiation patch 40 is the upper end of the plurality of feeding patch coupling protrusions 63 . Since it is disposed on the surface, it is disposed to be spaced apart from each other according to the height of the feeding patch coupling protrusion 63 . That is, the spaced distance between the feeding patch 30 and the radiation patch 40 may be adjusted according to the height of the feeding patch coupling protrusion 63 .

In addition, a plurality of feeding patch fixing protrusions 65 for maximally suppressing the flow of the mounted feeding patch 30 may be further formed on one surface of the support 60, and in response to the plurality of feeding patch fixing projections 65 A plurality of feeding patch fixing grooves 33 may be formed in the feeding patch 30 . The plurality of feeding patch fixing protrusions 65 are inserted into the corresponding feeding patch fixing grooves among the plurality of feeding patch fixing grooves 33 when the feeding patch 30 is disposed on one surface of the support body 60 to feed the feeding patch 30 . ) can be suppressed. Here, as an example, the feeding patch 30 is shown as having a triangular-shaped feeding patch fixing groove 33 formed, but the feeding patch 30 has a feeding patch fixing hole formed at a position corresponding to the feeding patch fixing protrusion 65 . it is free to be

Additionally, a plurality of support fixing protrusions 67 for suppressing the flow of the support 60 coupled to the substrate 10 may be further formed on the other surface of the support 60 . In addition, the support coupling hole 13 is formed in the substrate 10 at a position corresponding to each of the plurality of support fixing protrusions 67, and by inserting the plurality of support fixing projections 67 when the double polarized antenna is coupled, the support ( 60) can be stably fixed on the substrate 10 without flowing.

As shown in FIG. 3 , the double polarization antenna described above is first by disposing two feeding probes 21 and 22 and two matching structures 23 and 24 on one surface of the substrate 10, respectively, and the substrate 10 The two feeding probes 21 and 22 and the two matching structures 23 and 24 are coupled and fixed on one side of the support 60 to pass through, and then, the feeding patch 30 and the radiation patch 40 are sequentially connected. By combining in the direction of one side of the support 60 can be easily manufactured.

As a result, the dual polarization antenna according to the present embodiment implements two feed probes 21 and 22 in a hat shape on one surface of the substrate, and two feed probes 21 and 22 corresponding to the top surfaces of the two feed probes 21 and 22, respectively. By disposing the feeding patch 30 with the first slot 31 formed at the same height as the top surfaces of the feeding probes 21 and 22, the feeding patch ( 30) is not required, so a low profile can be realized.

7 shows the return loss of the dual polarization antenna according to the present embodiment, and FIG. 8 shows the horizontal radiation pattern of the dual polarization antenna according to the present embodiment.

7 shows the result of measuring the return loss in the 2.496 GHz frequency band. As shown in FIG. 7 , it can be seen that the dual polarization antenna according to the present embodiment has a low return loss. And FIG. 8 shows a radiation pattern for each frequency of the dual polarization antenna according to the present embodiment. Here, as an example, radiation patterns in each of the 2.496 GHz, 2.550 GHz, 2.660 GHz, and 2.690 GHz frequency bands are illustrated. As shown in FIG. 8 , it can be seen that the horizontal beamwidth of the dual polarization antenna according to the present embodiment has similar performance to that of the antenna according to the prior art.

Although the present invention has been described with reference to the embodiment shown in the drawings, which is only exemplary, those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

Accordingly, the true technical protection scope of the present invention should be defined by the technical spirit of the appended claims.

10: board 11, 12: feed line
13: support coupling hole 14: ground plane
21, 22: feeding probe 23, 24: matching structure
30: feed patch 31: first slot
32: second slot 33: feeding patch fixing groove
34: feed patch coupling portion 40: radiation patch
41: double polarization slit 42: radiation patch coupling hole
50: reflector 60: support
61: first through hole 62: second through hole
63: feeding patch engaging projection 64: radial patch engaging projection
65: feeding patch fixing protrusion 66: board coupling part
67: support fixing protrusion 310: feeding unit
330: first bending part 340: upper smooth part
340: second bending part 350: probe support part

Claims (13)

Board;
Two feeding probes extending in a predetermined direction on one surface of the substrate, each of which is implemented in a hat shape, a portion of which is spaced apart from one surface of the substrate and proceeds in parallel, and receives a feeding signal, respectively; and
and a feeding patch disposed at the same height as the top surfaces of the two feeding probes from one surface of the substrate and receiving a feeding signal from the two feeding probes according to a coupling feeding method,
The feed patch is
Two first slots are formed in which each of the top surfaces of the two feeding probes are spaced apart and inserted therein,
The two first slots are
A dual polarization antenna formed in 45° and -45° directions corresponding to the two feeding probes formed in a shape extending in 45° and -45° directions at predetermined positions on one surface of the substrate.
delete According to claim 1, wherein the dual polarization antenna
Double polarization further comprising two matching structures having a shape corresponding to the shape of the two feeding probes and disposed on one surface of the substrate having positions and extension directions corresponding to the positions and extension directions of the two feeding probes antenna. According to claim 1, wherein the dual polarization antenna
It is disposed between the substrate and the feeding patch, further comprising a support for fixing the feeding patch at a predetermined position spaced apart from each other by a predetermined distance from the substrate,
The support is
A dual polarization antenna having a position and a shape corresponding to the position and shape of each of the two first slots, and having two first through-holes through which top surfaces of the two feeding probes are inserted. According to claim 1, wherein the dual polarization antenna
The double polarization antenna further comprising a radiation patch that is spaced apart from the feeding patch by a predetermined distance in the direction of one surface of the substrate and is fed by a coupling feeding method from the feeding patch. The method of claim 5, wherein the dual polarization antenna
two matching structures having a shape corresponding to the shape of the two feeding probes and disposed on one surface of the substrate having positions and extending directions corresponding to the positions and extending directions of the two feeding probes; and
A double polarization antenna formed on the radiation patch and further comprising a plurality of slits having shapes corresponding to the arrangement positions and extension directions of the two feeding probes and the two matching structures The method of claim 3, wherein the feeding patch
Double polarized wave in which two second slots extending in 45° and -45° directions corresponding to the position and extension direction of each of the two matching structures are further formed so that the top surfaces of the two matching structures are respectively spaced apart and inserted therein antenna. The method of claim 1, wherein each of the two feeding probes is
a power feeding unit extending in a predetermined direction on one surface of the substrate and receiving a power feeding signal;
a first bending part having one end connected to the feeding part and extending in a vertical direction from the substrate;
an upper smoothing part having one end connected to the other end of the first bending part and extending parallel to one surface of the substrate to form an upper surface of the feeding probe;
a second bending part having one end connected to the other end of the upper smoothing part and extending perpendicular to the upper smoothing part in a direction of the substrate; and
and a probe support part having one end connected to the other end of the second bending part on one surface of the substrate and extending again by a predetermined distance along an extension direction of the feeding part. According to claim 1, wherein the dual polarization antenna
a ground plane formed on the other surface of the substrate; and
The double polarization antenna further comprising a reflector disposed in close contact with the ground plane in the direction of the other surface of the substrate or spaced apart by a predetermined interval. Board;
While extending in a predetermined direction on one surface of the substrate, a part of each of them is implemented in a hat shape that is spaced apart from one surface of the substrate and proceeds in parallel, and 45° and -45° polarized signals are respectively used as feed signals. Two energized feed probes;
It is spaced apart from one surface of the substrate by a predetermined distance, receives a feed signal from the two feed probes according to a coupling feed method, and has a position and an extension direction corresponding to the position and extension direction of the two feed probes. a feeding patch in which two first slots into which upper surfaces of the two feeding probes are inserted are formed; and
and a radiation patch disposed to be spaced apart from the feeding patch by a predetermined distance in the direction of one surface of the substrate, and fed by a coupling feeding method from the feeding patch to radiate a double polarized wave,
Two first through holes are formed with positions and shapes corresponding to the positions and shapes of the two first slots so that the top surfaces of the two feeding probes are inserted through, and disposed between the substrate and the feeding patch, , Double polarized antenna further comprising a support for fixing each of the feed patch and the radiation patch at a designated position spaced apart from each other by a predetermined distance from the substrate.
delete 11. The method of claim 10, wherein the dual polarization antenna
Two matching structures having a shape corresponding to the shape of each of the two feeding probes and formed in a direction extending in 45° and -45° directions corresponding to the positions and extension directions of the two feeding probes on one surface of the substrate A dual polarization antenna further comprising a. The method of claim 12, wherein the feeding patch
Two second slots extending in 45° and -45° directions are further formed corresponding to the positions and extension directions of the two matching structures, respectively,
The support is
A double polarization antenna further comprising two second through-holes having positions and shapes corresponding to positions and shapes of the two second slots so that upper surfaces of the two matching structures are inserted through.

Images