Antenna radiation unit and communication equipment

Abstract

The present invention provides an antenna radiation unit and a communication device, which relate to the technical field of smart antennas. The antenna radiation unit includes: a dielectric substrate, a balun component and a grounding plate; wherein the dielectric substrate is arranged on the top of the balun component, and the grounding plate is arranged on the bottom of the balun component; the dielectric substrate includes a feeding layer and a coupling layer, and the feeding layer and the coupling layer are arranged on opposite surfaces of the dielectric substrate; the feeding layer is provided with a feeding unit, and the coupling layer is provided with a coupling unit, and the feeding unit and the coupling unit are partially overlapped in the area corresponding to the coupling unit to form a coupling area of ​​the antenna radiation unit. The antenna radiation unit and the communication device provided by the embodiment of the present invention can achieve the normal passage of high-frequency current and suppress low-frequency current by adjusting the coupling area of ​​the above-mentioned overlapping part. At the same time, the structure can also realize the common-mode resonance frequency of the high-frequency unit to move to high frequency, so that the resonance frequency falls outside the low-frequency working band, thereby effectively reducing the impact on the low-frequency radiation performance.

Description

Technical Field

[0001] The present invention relates to the technical field of smart antennas, and in particular to an antenna radiation unit and communication equipment. Background Art

[0002] With the development of wireless communications, base station antennas are moving towards multi-frequency and multi-system directions. However, interference between different frequencies of multi-frequency antennas will affect the radiation performance, causing the deterioration of the directional pattern performance indicators, thereby reducing network performance.

[0003] In previous antennas, interference is often reduced by increasing the distance between high and low frequency units, but this will cause the antenna size to be larger, which is not conducive to antenna installation and layout. Another way is to make the high frequency unit in the form of a patch, but the patch unit cannot achieve ultra-wideband and can only achieve narrowband antennas. The latest unit design removes the common mode resonance outside the low frequency working band by adding a suppression circuit to the balun, but this method is often difficult to match and has high losses. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an antenna radiation unit and a communication device to alleviate the above technical problems.

[0005] In a first aspect, an embodiment of the present invention provides an antenna radiating unit, comprising: a dielectric substrate, a balun assembly and a ground plate; wherein the dielectric substrate is arranged on the top of the balun assembly, and the ground plate is arranged on the bottom of the balun assembly; the dielectric substrate comprises a feeding layer and a coupling layer, and the feeding layer and the coupling layer are arranged on opposite surfaces of the dielectric substrate; the feeding layer is provided with a feeding unit, and the coupling layer is provided with a coupling unit, and the feeding unit partially overlaps with the area corresponding to the coupling unit to form a coupling area of ​​the antenna radiating unit.

[0006] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation scheme of the first aspect, wherein the above-mentioned feeding unit includes a preset number of feeding lines, and the coupling unit includes a preset number of coupling arms; the feeding line partially overlaps with the corresponding coupling arm to form a coupling area of ​​the antenna radiating unit.

[0007] In combination with the first possible implementation of the first aspect, an embodiment of the present invention provides a second possible implementation of the first aspect, wherein the above-mentioned antenna radiating unit also includes a printed circuit arranged on the feeding layer and the coupling layer; the printed circuit is used to tune the radiation characteristics of the antenna radiating unit.

[0008] In combination with the second possible implementation of the first aspect, an embodiment of the present invention provides a third possible implementation of the first aspect, wherein the above-mentioned printed circuit includes at least one first circuit arranged in the feed layer, and a second circuit arranged in the coupling layer and electrically connected to the corresponding first circuit; the number of the second circuits also matches the number of the coupling arms, and each of the second circuits is electrically connected to the corresponding coupling arm.

[0009] In combination with the third possible implementation of the first aspect, the embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein the dielectric substrate is further provided with at least one metal via, and the first circuit is electrically connected to the corresponding second circuit through the metal via.

[0010] In combination with the third possible implementation of the first aspect, an embodiment of the present invention provides a fifth possible implementation of the first aspect, wherein at least one of the above-mentioned first lines is arranged at the edge position of the feed layer; the feed line is arranged at the center position of the feed layer, and a via matching the balun component is also arranged in the feed area formed by the feed line on the feed layer, and the via is used to fix the dielectric substrate to the balun component.

[0011] In combination with the first aspect, the embodiment of the present invention provides a sixth possible implementation of the first aspect, wherein the balun component includes at least two dielectric sheets, and at least two of the dielectric sheets are nested.

[0012] In combination with the sixth possible implementation of the first aspect, an embodiment of the present invention provides a seventh possible implementation of the first aspect, wherein the above-mentioned dielectric sheet includes a signal line and a ground line, and the signal line and the ground line are respectively arranged on two opposite surfaces of the above-mentioned dielectric sheet; wherein one end of the signal line is fed into the bottom of the balun component, and the other end of the signal line is coupled to the ground line; one end of the ground line is connected to the grounding sheet arranged at the bottom of the balun component, and the other end is connected to the feeding unit.

[0013] In combination with the seventh possible implementation of the first aspect, an embodiment of the present invention provides an eighth possible implementation of the first aspect, wherein the above-mentioned grounding plate includes a grounding dielectric plate, and a grounding layer arranged at the bottom of the grounding dielectric plate; wherein the bottom of the grounding dielectric plate is a surface away from the balun component; when the grounding plate is arranged at the bottom of the balun component, the ground wire passes through the grounding dielectric plate and is connected to the grounding layer to form a common ground structure with the grounding plate.

[0014] In a second aspect, an embodiment of the present invention further provides a communication device, which is provided with the antenna radiation unit described in the first aspect.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] The antenna radiation unit and communication device provided by the embodiments of the present invention form the antenna radiation unit by arranging a dielectric substrate on the top of the balun component and arranging a ground plate on the bottom of the balun component, and the dielectric substrate includes a feeding layer and a coupling layer, the feeding layer and the coupling layer are arranged on opposite surfaces of the dielectric substrate, the feeding layer is also provided with a feeding unit, and the coupling layer is also provided with a coupling unit, and the feeding unit and the coupling unit The corresponding area partially overlaps to form a coupling area of ​​the antenna radiation unit, and by adjusting the coupling area of ​​the above-mentioned overlapping part, the high-frequency current can be passed normally while the low-frequency current is suppressed. At the same time, the structure can also realize the common-mode resonance frequency of the high-frequency unit moving to a high frequency, so that the resonance frequency falls outside the low-frequency working band, thereby effectively reducing the impact on the low-frequency radiation performance.

[0017] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of an antenna radiation unit provided in an embodiment of the present invention;

[0021] Figure 2 A schematic structural diagram of another antenna radiation unit provided in an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a feed layer provided in an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of a coupling layer provided by an embodiment of the present invention;

[0024] Figure 5A schematic diagram of an equivalent circuit of an antenna radiating unit provided in an embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of a dielectric sheet provided by an embodiment of the present invention;

[0026] Figure 7 A schematic structural diagram of another dielectric sheet provided by an embodiment of the present invention.

[0027] Icon: 100- dielectric substrate; 101- balun assembly; 102- grounding plate; 103- feeding unit; 104- coupling unit; 301- feeding line; 302- first line; 303- metal via; 304- via; 402- coupling arm; 403- second line; 601- first nested slot; 602- second nested slot; 603- upward protrusion; 604- downward protrusion; 605- signal line. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] At present, the low frequency band of the multi-frequency antenna can include the GSM900 band, which operates at 880-960MHz. The low frequency band can also include the 800M band operating at 790-880MHz and the 700M band at a lower frequency band of 694-790Mhz. The high frequency band of the multi-frequency antenna can include the GSM1800 band operating at 1710-1880MHz, the UMTS band operating at 1920-2170MHz, and the LTE2600M band operating at 2500-2700MHz.

[0030] In the antennas of the above-mentioned frequency bands, the single-sided radiating arm and balun of the high-frequency unit are equivalent to about one-quarter wavelength of the low-frequency band, which can be equivalent to a low-frequency monopole antenna, which will produce low-frequency common-mode resonance and interfere with the radiation performance of the low-frequency unit. In previous antennas, interference is often reduced by increasing the distance between the high and low frequency units, but this will cause the antenna size to be too large, which is not conducive to antenna installation and layout. Another way is to make the high-frequency unit in the form of a patch, but the patch unit cannot achieve ultra-wideband and can only achieve a narrowband antenna. The latest unit design removes the common-mode resonance outside the low-frequency working band by adding a suppression circuit to the balun, but this method is often difficult to match and has high losses. Based on this, an antenna radiating unit and communication equipment provided in an embodiment of the present invention can effectively alleviate the above problems.

[0031] To facilitate understanding of this embodiment, an antenna radiation unit disclosed in an embodiment of the present invention is first introduced in detail.

[0032] In a possible implementation manner, an embodiment of the present invention provides an antenna radiating unit, such as Figure 1 , a structural schematic diagram of an antenna radiation unit is shown, comprising: a dielectric substrate 100, a balun component 101 and a grounding plate 102; wherein the dielectric substrate 100 is arranged on the top of the balun component 101, and the grounding plate 102 is arranged on the bottom of the balun component 101.

[0033] Specifically, the dielectric substrate 100 includes a feeding layer and a coupling layer, which are arranged on opposite surfaces of the dielectric substrate; the feeding layer is provided with a feeding unit, and the coupling layer is provided with a coupling unit, and the feeding unit and the coupling unit partially overlap in the area corresponding to the feeding unit to form a coupling area of ​​the antenna radiation unit.

[0034] For ease of understanding, Figure 2 A schematic diagram of the structure of another antenna radiation unit is shown, wherein: Figure 2 It is shown that Figure 1 The antenna radiation unit is shown in different perspectives, and for ease of description, the feeding layer is arranged on the upper surface of the dielectric substrate, and the coupling layer is arranged on the lower surface of the dielectric substrate as an example for description, wherein: Figure 1 FIG. 4 shows a feeding unit disposed on the upper surface of the dielectric substrate, that is, a feeding unit 103 shown in a dotted line frame. Figure 2 FIG. 1 shows a coupling unit 104 of the coupling layer on the lower surface of the dielectric substrate.

[0035] When implementing it specifically, Figure 1 and Figure 2 As shown, the area where the feeding unit 103 shown in the dotted box is located on the upper surface of the dielectric substrate and the area where the coupling unit 104 is located on the lower surface of the dielectric substrate are partially overlapped. The size of the overlapping area can be determined according to the design requirements of the antenna radiation unit, and from the perspective of antenna tuning, the overlapping area can be equivalent to a capacitor structure. Adjusting the size of the overlapping area can control the size of the capacitor, thereby enabling the normal passage of high-frequency current while suppressing low-frequency current. Furthermore, the structure in which the above-mentioned feeding unit and the coupling unit partially overlap can also realize the common-mode resonant frequency of the high-frequency unit moving to high frequency, so that the resonant frequency falls outside the low-frequency working band, thereby effectively reducing the impact on the low-frequency radiation performance.

[0036] Therefore, the antenna radiating unit provided in the embodiment of the present invention is composed of an antenna radiating unit by setting a dielectric substrate on the top of the balun component and setting a ground plate on the bottom of the balun component, and the dielectric substrate includes a feeding layer and a coupling layer, the feeding layer and the coupling layer are arranged on opposite surfaces of the dielectric substrate, the feeding layer is also provided with a feeding unit, and the coupling layer is also provided with a coupling unit, and the feeding unit and the coupling unit The corresponding area partially overlaps to form a coupling area of ​​the antenna radiating unit. By adjusting the coupling area of ​​the above-mentioned overlapping part, the high-frequency current can be passed normally while the low-frequency current is suppressed. At the same time, the structure can also realize the common-mode resonance frequency of the high-frequency unit moving to a high frequency, so that the resonance frequency falls outside the low-frequency working band, thereby effectively reducing the impact on the low-frequency radiation performance.

[0037] In actual use, the above-mentioned feeding unit includes a preset number of feeding lines, and the coupling unit includes a preset number of coupling arms; the above-mentioned overlapping area is equivalent to the partial overlap of the area where the feeding line and the coupling arm are located, that is, the feeding line partially overlaps with the corresponding coupling arm to form the coupling area of ​​the above-mentioned antenna radiation unit.

[0038] For ease of understanding, the above-mentioned feeding unit includes 4 feeding lines, and the coupling unit includes 4 coupling arms. Figure 3 A schematic diagram of the structure of a feed layer is also shown. Figure 4 A structural schematic diagram of a coupling layer is also shown.

[0039] in, Figure 3 1 is a top view of the feed layer, specifically, a top view of the upper surface of the dielectric substrate 100. Figure 3 As shown, it includes 4 feeder lines 301; Figure 4 1 is a top view of the coupling layer, specifically, a top view of the lower surface of the dielectric substrate 100. Figure 4 As shown, four coupling arms 402 are included.

[0040] In actual use, Figure 3 The monolithic feed circuit shown is Figure 4 The total length of the corresponding coupling arm is about one-quarter wavelength of the preset high frequency, and the combination of two can form a half-wave oscillator, thereby realizing normal radiation of high frequency. In addition to suppressing common-mode signals, the coupling structure of the above-mentioned feeding line and the coupling arm can also improve the matching characteristics of the antenna radiating unit as a high-frequency radiating arm, make the input impedance more stable, and expand the working bandwidth.

[0041] It should be understood that Figure 3 and Figure 4In the embodiment, the dielectric substrate is a square as an example for explanation, and the feeding lines and the coupling arms are evenly arranged on their respective surfaces to form the above-mentioned partially overlapping structure. In other implementations, the shape of the dielectric substrate can also be other forms, such as a rectangle, a circle, a polygon or other shapes, and the number of the feeding lines and the coupling arms and the arrangement method on the surface of the dielectric substrate can also be set according to actual usage, and the embodiment of the present invention is not limited to this.

[0042] Furthermore, the antenna radiation unit provided in the embodiment of the present invention further includes a printed circuit provided on the feeding layer and the coupling layer; the printed circuit is used to tune the radiation characteristics of the antenna radiation unit.

[0043] Specifically, the printed circuit includes at least one first circuit arranged in the feed layer, and a second circuit arranged in the coupling layer and electrically connected to the corresponding first circuit; the number of the second circuits also matches the number of coupling arms, and each second circuit is electrically connected to the corresponding coupling arm.

[0044] Furthermore, the dielectric substrate is also provided with at least one metal via, and the first circuit is electrically connected to the corresponding second circuit through the metal via.

[0045] For ease of understanding, Figure 3 and Figure 4 Schematic diagrams of the first circuit, the second circuit and the metal via are also shown respectively. Specifically, Figure 3 The first line 302 shown, and Figure 4 The second line 403 is shown, and Figure 3 and Figure 4 The metal via 303 in the.

[0046] Specifically, the first line 302 is arranged on the feeding layer, that is, the upper surface of the dielectric substrate in the embodiment of the present invention, and the second line 403 is arranged on the coupling layer, that is, the lower surface of the dielectric substrate in the embodiment of the present invention, and the number of the first lines is consistent with the number of the feeding lines, such as Figure 3 As shown, each feeding line corresponds to a first line, and similarly, the number of second lines is consistent with the number of coupling arms, and, as shown Figure 4 As shown, the end of each coupling arm is connected to a second line.

[0047] In actual use, the above-mentioned printed circuit can be realized by a thinner bending line, and the second line connected to the end of the coupling arm, the metal via and the first line connection constitute an extended structure of the coupling arm, wherein the second line formed by the bending line can be equivalent to an inductor structure, which can allow the low-frequency range of the high frequency to pass normally, while forming a suppression function for the high-frequency range of the high frequency, so that through this structure, the relatively lower frequency band in the high-frequency passband has a longer current path than the relatively higher frequency band, so that the entire frequency band has an almost equal electrical length, thereby being able to stabilize the gain and bandwidth characteristics of the high and low frequency ranges in the high-frequency passband.

[0048] further, Figure 5 A schematic diagram of an equivalent circuit of an antenna radiation unit is also shown, in which the capacitor C represents the equivalent capacitor structure of the overlapping area, and the inductor L represents the equivalent inductor structure of the second line. By loading the above-mentioned distributed capacitors and inductors, common-mode suppression can be achieved, and at the same time, wide-band stable radiation characteristics can be achieved.

[0049] In actual use, Figure 3 As shown, the at least one first circuit is arranged at the edge of the feed layer; the feed circuit is arranged at the center of the feed layer, and a via hole matching the balun component is also arranged in the feed area formed by the feed circuit on the feed layer, and the via hole is used to fix the dielectric substrate and the balun component. Specifically, as Figure 3 and Figure 4 The via hole 304 shown has a size that matches the size of the balun component, so as to facilitate fixing the above-mentioned dielectric substrate and the balun component.

[0050] Furthermore, the balun assembly comprises at least two dielectric sheets, and the at least two dielectric sheets are nested. Specifically, Figure 6 A schematic diagram of the structure of a dielectric sheet is shown. Figure 7 A schematic diagram of the structure of another dielectric sheet is shown, and for ease of understanding, an example of the present invention is given by taking two dielectric sheets orthogonally nested to form a balun component. Specifically, Figure 6 The structure diagram of the first dielectric sheet is shown. The first dielectric sheet is provided with a first nesting groove 601. Figure 7 The second dielectric sheet is shown. The second dielectric sheet is provided with a second nesting groove 602. The first dielectric sheet and the second dielectric sheet are nested together through the first nesting groove 601 and the second nesting groove 602 to form the above-mentioned balun assembly.

[0051] Furthermore, both ends of the first dielectric sheet and the second dielectric sheet are provided with protrusions, such as Figure 6 and Figure 7As shown, the upward protrusion 603 arranged at the top of the dielectric sheet is used to fix the balun component to the dielectric substrate, and the downward protrusion 604 arranged at the bottom of the dielectric sheet is used to fix the balun component to the grounding sheet.

[0052] Furthermore, the dielectric sheet further comprises a signal line and a ground line, and the signal line and the ground line are respectively arranged on two opposite surfaces of the dielectric sheet; wherein, Figure 6 and Figure 7 The figures shown in the figure are the front views corresponding to the surfaces where the signal lines are located. Therefore, Figure 6 and Figure 7 Also shown is a signal line 605.

[0053] Specifically, one end of the signal line is fed through the bottom of the balun assembly, and the other end of the signal line is coupled to the ground line; one end of the ground line is connected to the grounding plate arranged at the bottom of the balun assembly, and the other end is connected to the feeding unit. Specifically, the ground line is usually in the form of a middle slit, and the bottom of the ground line is connected to the grounding plate together with the downward protrusion 604 at the bottom of the dielectric sheet, and the top of the ground line passes through the dielectric substrate together with the dielectric sheet, and then connected to the feeding line of the feeding layer.

[0054] Furthermore, the grounding sheet includes a grounding dielectric sheet and a grounding layer arranged at the bottom of the grounding dielectric sheet; wherein the bottom of the grounding dielectric sheet is a surface away from the balun component;

[0055] When the grounding sheet is disposed at the bottom of the balun assembly, the ground line of the dielectric sheet of the balun assembly passes through the grounding dielectric sheet and is connected to the grounding layer to form a common ground structure with the grounding sheet.

[0056] It should be understood that in the embodiment of the present invention, two dielectric sheets are orthogonally nested to form a balun component as an example for explanation, therefore, Figure 3 and Figure 4 The number of vias 304 for fixing the dielectric substrate and the balun assembly shown in the figure is also set based on two dielectric sheets as an example. In other embodiments, the number of dielectric sheets and the protrusions on the dielectric sheets can also be set according to actual usage, and the embodiment of the present invention does not limit this.

[0057] On the basis of the above-mentioned embodiment, the embodiment of the present invention further provides a communication device. Specifically, the communication device is provided with the above-mentioned antenna radiation unit.

[0058] The communication device provided in the embodiment of the present invention has the same technical features as the antenna radiation unit provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0059] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the communication device described above can refer to the corresponding process in the aforementioned embodiment, and will not be repeated here.

[0060] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0062] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An antenna radiating unit, It is characterized in that include: Dielectric substrate, balun assembly and ground plate; Wherein, the dielectric substrate is arranged on the top of the balun component, and the grounding sheet is arranged on the bottom of the balun component; The dielectric substrate comprises a feeding layer and a coupling layer, wherein the feeding layer and the coupling layer are arranged on opposite surfaces of the dielectric substrate; The feeding layer is provided with a feeding unit, the coupling layer is provided with a coupling unit, and the feeding unit partially overlaps with an area corresponding to the coupling unit to form a coupling area of ​​the antenna radiation unit; Wherein, the feeding unit includes a preset number of feeding lines, and the coupling unit includes a preset number of coupling arms; The feed line partially overlaps with the corresponding coupling arm to form a coupling region of the antenna radiation unit; Moreover, the overlapping region is equivalent to a capacitor structure, and the size of the overlapping region is adjusted to control the size of the equivalent capacitor, thereby achieving normal passage of high-frequency current while suppressing low-frequency current.

2. The antenna radiating unit according to claim 1, It is characterized in that The antenna radiation unit further includes a printed circuit arranged on the feed layer and the coupling layer; The printed circuit is used to tune the radiation characteristics of the antenna radiation unit.

3. The antenna radiation unit according to claim 2, It is characterized in that The printed circuit includes at least one first circuit arranged on the feed layer, and a second circuit arranged on the coupling layer and electrically connected to the corresponding first circuit; The number of the second lines also matches the number of the coupling arms, and each of the second lines is electrically connected to a corresponding coupling arm.

4. The antenna radiation unit according to claim 3, It is characterized in that The dielectric substrate is further provided with at least one metal via, and the first circuit is electrically connected to the corresponding second circuit through the metal via.

5. The antenna radiation unit according to claim 3, It is characterized in that At least one of the first lines is arranged at an edge position of the feed layer; The feed line is arranged at the center of the feed layer, and a via hole matching the balun component is also arranged in the feed area formed by the feed line on the feed layer, and the via hole is used to fix the dielectric substrate and the balun component.

6. The antenna radiation unit according to claim 1, It is characterized in that The balun component includes at least two dielectric sheets, and at least two of the dielectric sheets are nested.

7. The antenna radiation unit according to claim 6, It is characterized in that The dielectric sheet comprises a signal line and a ground line, and the signal line and the ground line are respectively arranged on two opposite surfaces of the dielectric sheet; Wherein, one end of the signal line is fed into the bottom of the balun component, and the other end of the signal line is coupled to the ground line; One end of the ground wire is connected to the ground plate arranged at the bottom of the balun component, and the other end is connected to the feeding unit.

8. The antenna radiation unit according to claim 7, It is characterized in that The grounding sheet includes a grounding dielectric sheet and a grounding layer arranged at the bottom of the grounding dielectric sheet; wherein the bottom of the grounding dielectric sheet is a surface away from the balun component; When the grounding plate is disposed at the bottom of the balun assembly, the ground line passes through the grounding dielectric plate and is connected to the grounding layer to form a common ground structure with the grounding plate.

9. A communication device, It is characterized in that The communication device is provided with the antenna radiation unit according to any one of claims 1 to 8.

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