WO2021036019A1

WO2021036019A1 - Radiation units and antennas

Info

Publication number: WO2021036019A1
Application number: PCT/CN2019/119378
Authority: WO
Inventors: 孙彦明; 谢晖; 任源朋; 孙波; 程伟; 杨耀庭; 吴卫华
Original assignee: 武汉虹信科技发展有限责任公司
Priority date: 2019-08-27
Filing date: 2019-11-19
Publication date: 2021-03-04
Also published as: CN110504556A; CN110504556B

Abstract

Provided in embodiments of the present disclosure is a multi-frequency antenna array. Each row in the multi-frequency antenna array comprises a plurality of high-frequency radiation units and a plurality of low-frequency radiation units; axis spacing between two adjacent rows is D; for any row in the multi-frequency antenna array, the distance between the centers of two adjacent high-frequency radiation units is L; the distance between the centers of two adjacent low-frequency radiation units is n×L; any low-frequency radiation unit is located at the midpoint of a connection line between two adjacent high-frequency radiation units of the any low-frequency radiation unit; for any two adjacent rows in the multi-frequency antenna array, any high-frequency radiation unit in a first row is located on the central axis of a connection line between two adjacent high-frequency radiation units in a second row; and any low-frequency radiation unit in the first row is located on the central axis of a connection line between two adjacent low-frequency radiation units in the second row. The multi-frequency antenna array provided in the embodiments of the present disclosure may effectively reduce the coupling effect between frequencies and improve the performance index.

Description

[Corrected according to Rule 26 02.01.2020] 　Multi-frequency antenna array

Cross-references to related applications

This application claims the priority of a Chinese patent application filed on August 27, 2019 with the application number 201910795827.9 and the invention title "Multi-frequency antenna array", which is fully incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the field of communication technology, and more specifically, to a multi-frequency antenna array.

Background technique

With the development of the fourth-generation mobile communication system (4G) network coverage technology and the opening of the fifth-generation mobile communication system (5G) era, in the implementation of the network coverage of the operator’s network planning, network coverage implementation, it is necessary to have a solution that can support 4G Antenna products that are compatible with multiple networks and can meet the coverage of 5G network standards. In response to the above needs, the mobile communication industry has proposed the product concept and form of multi-frequency fusion antennas, such as 4+4+8+8 independent ESC smart antenna, 2+2+8+8 independent ESC smart antenna, 2+2+ 2+8 independent ESC smart antenna, etc. This type of product realizes that one antenna meets the coverage function of all standards and frequencies from 2G to 5G, and effectively solves the current shortage of antenna resources, high site rents, and large amount of installation and construction of multi-standard antennas. It has become a transition period from 4G to 5G. Important product form.

In order to realize the design of multi-frequency and multi-standard antenna arrays in the same antenna, the technical means of multi-frequency array fusion and multiplexing radiation aperture must be adopted. In the scenario of high and low frequency fusion arrays, because the high and low frequency radiating elements are stacked on each other and are radiation boundaries, there are serious mutual coupling effects and impedance deviations, which seriously affect the radiation performance of the respective radiating elements, resulting in multi-frequency antennas The performance of the array is poor.

Summary of the invention

The embodiments of the present disclosure provide a multi-frequency antenna array to solve or at least partially solve the disadvantage of poor performance of the multi-frequency antenna array in the prior art.

Embodiments of the present disclosure provide a multi-frequency antenna array, each row in the multi-frequency antenna array includes a plurality of high-frequency radiation units and a plurality of low-frequency radiation units; the axis distance between two adjacent rows is D;

For any row in the multi-frequency antenna array, the distance between the centers of two adjacent high-frequency radiating elements is L; the distance between the centers of two adjacent low-frequency radiating elements is n×L; The radiating unit is located at the midpoint of the connection line between two high-frequency radiating units adjacent to any one of the low-frequency radiating units;

For any two adjacent rows in the multi-frequency antenna array, any high-frequency radiation unit in the first row is located on the central axis of the connection line between two adjacent high-frequency radiation units in the second row ; Any low-frequency radiation unit in the first row is located on the central axis of the line between two adjacent low-frequency radiation units in the second row;

Among them, L=0.7～1.1λ ₁ , D=0.5～0.7λ ₁ , λ ₁ represents the wavelength corresponding to the center frequency of the high-frequency radiating unit; n is the difference between the center frequency of the high-frequency radiating unit and the center frequency of the low-frequency radiating unit The nearest integer to 2 times the ratio.

Preferably, when viewed from the front of the multi-frequency antenna array, the projections of any high-frequency radiation unit and any low-frequency radiation unit do not overlap.

Preferably, the low-frequency radiation unit includes two dipoles arranged orthogonally;

For any one of the dipoles, the dipole includes a top, two vertical baluns, and a base;

The base includes two inclined sections and a connecting piece;

The upper end of the inclined section is connected with the lower end of a vertical balun; the lower end of the inclined section is inclined toward the outside of the low-frequency radiation unit; the lower ends of the two inclined sections are connected by the connecting member.

Preferably, a radiation guide ring is provided above each high-frequency radiation unit adjacent to the low-frequency radiation unit;

The top surface of the radiation guide ring is the same height as the top surface of the low-frequency radiation unit.

Preferably, the two dipoles are a first dipole and a second dipole;

The connecting piece of the first dipole bypasses the connecting piece of the second dipole from above, so that the two do not contact each other.

Preferably, the connecting member of the first dipole includes a first horizontal section, a first connecting section, a second horizontal section, a second connecting section, and a third horizontal section that are connected in sequence;

The connecting piece of the second dipole includes a fourth horizontal section, a third connecting section, a fifth horizontal section, a fourth connecting section, and a sixth horizontal section that are connected in sequence;

The second horizontal section is higher than the fifth horizontal section; the fifth horizontal section is higher than the fourth horizontal section; the first horizontal section, the third horizontal section, and the sixth horizontal section , All have the same height as the fourth horizontal section.

Preferably, the first horizontal section, the third horizontal section, the fourth horizontal section and the sixth horizontal section are all provided with downward bosses.

Preferably, the multi-frequency antenna array further includes a reflective bottom plate;

Each of the bosses is connected to the reflective bottom plate by a metal fastener.

Preferably, the space between each high-frequency radiation unit adjacent to the low-frequency radiation unit and the reflective bottom plate is filled with an insulating material.

Preferably, the outer diameter of the radiation guide ring is 0.24 to 0.28λ ₁ , and the inner diameter of the radiation guide ring is 0.12 to 0.18λ ₁ .

With the multi-frequency antenna array provided by the embodiments of the present disclosure, the low-frequency radiation unit is located on the central axis of the adjacent high-frequency radiation unit through the misalignment distribution of two adjacent rows of high-frequency radiation units, which can effectively reduce the coupling between the frequencies The effect can significantly reduce the influence between the radiating elements in the multi-frequency antenna array, and can significantly improve the performance index of the multi-frequency antenna array. In addition, it can realize the array fusion of high and low frequency and the spatial multiplexing of the boundary of the high and low frequency array. Under the condition that the gain of each frequency of the antenna array is unchanged, the antenna radiation aperture area can be greatly reduced.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a multi-frequency antenna array provided according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a low-frequency radiation unit in a multi-frequency antenna array according to an embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of a multi-frequency antenna array provided according to an embodiment of the present disclosure;

Fig. 4 is a partial schematic diagram of Fig. 3.

detailed description

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are a part of the embodiments of the present disclosure, but not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In order to overcome the above-mentioned problems in the prior art, embodiments of the present disclosure provide a multi-frequency antenna array. The inventive concept is to effectively reduce the mutual coupling between the arrays by arranging the low-frequency radiation unit at the center of the four high-frequency radiation units. The effect and impedance deviation can improve the performance of each frequency array of the fusion antenna.

Fig. 1 is a schematic structural diagram of a multi-frequency antenna array provided according to an embodiment of the present disclosure. As shown in FIG. 1, the multi-frequency antenna array includes: each row in the multi-frequency antenna array includes a plurality of high-frequency radiation units 2 and a plurality of low-frequency radiation units 1; the axis distance between two adjacent rows is D.

Among them, D=0.5～0.7λ ₁ , and λ ₁ represents the wavelength corresponding to the center frequency of the high-frequency radiation unit 2.

It can be understood that the multi-frequency antenna array also includes a reflective base plate 3. A plurality of identical high-frequency radiation units 2 and multiple identical low-frequency radiation units 1 are arranged in a certain manner on the reflective base plate 3 to form a multi-frequency antenna. Array.

The reflective bottom plate 3 may be a metal reflective bottom plate.

The high-frequency radiation unit 2 and the low-frequency radiation unit 1 are both dual-polarized radiation units, specifically half-wave oscillators. The longer the wavelength, the larger the half-wave oscillator.

Specifically, each row in the multi-frequency antenna array can be regarded as a multi-frequency fusion sub-array.

For each multi-frequency fusion sub-array, the multi-frequency fusion sub-array includes a plurality of high-frequency radiation units 2 and a plurality of low-frequency radiation units 1. The center of each high-frequency radiation unit 2 and the center of each low-frequency radiation unit 1 are located on the same straight line, which is the axis of the multi-frequency fusion sub-array, that is, the axis of the row.

The axis spacing refers to the distance between the axes of the multi-frequency fusion sub-array.

The center frequency of the high-frequency radiation unit refers to the center frequency in the working frequency band of the high-frequency radiation unit.

The working frequency band of the high-frequency radiation unit can be 1.7-2.7GHz. The center frequency of the high-frequency radiation unit is about 2.2Ghz.

For any row in the multi-frequency antenna array, the distance between the centers of two adjacent high-frequency radiating elements 2 is L; the distance between the centers of two adjacent low-frequency radiating elements 1 is n×L; The radiating unit 1 is located at the midpoint of the connecting line between two high-frequency radiating units 2 adjacent to any low-frequency radiating unit 1.

Among them, L=0.7～1.1λ ₁ , λ ₁ represents the wavelength corresponding to the center frequency of the high-frequency radiating unit 2; n is the ratio of the center frequency of the high-frequency radiating unit 2 to the center frequency of the low-frequency radiating unit 1. Close integer.

Specifically, for each multi-frequency fusion sub-array, the multiple high-frequency radiation units 2 included in the multi-frequency fusion sub-array form a linear array.

In the multi-frequency fusion sub-array, the distance between the centers of any two adjacent high-frequency radiation units 2 is L.

It can be understood that the size of the radiating unit is related to the operating frequency, and therefore, the size of the high-frequency radiating unit is less than 0.5λ ₁ .

In the multi-frequency fusion sub-array, the low-frequency radiation unit 1 is arranged between two adjacent high-frequency radiation units 2, and the center of the low-frequency radiation unit 1 is the connection between the two adjacent high-frequency radiation units 2. The midpoint of the line.

The connection between two adjacent high-frequency radiation units refers to the connection between the centers of two adjacent high-frequency radiation units. Obviously, the connecting line is a part of the axis of the multi-frequency fusion sub-array.

It should be noted that the low-frequency radiation unit 1 is not provided between every two adjacent high-frequency radiation units 2. In the multi-frequency fusion sub-array, the distance between the centers of two adjacent low-frequency radiation units 1 is n times L.

The center frequency of the low-frequency radiating unit refers to the center frequency in the working frequency band of the low-frequency radiating unit.

The working frequency band of the low-frequency radiation unit can be 880-960MHz. The center frequency of the low-frequency radiation unit is about 900Mhz.

Therefore, the ratio of the center frequency of the high-frequency radiation unit 2 to the center frequency of the low-frequency radiation unit 1 is approximately equal to 2.5, and the value of n may be 5.

When n=5, in each multi-frequency fusion sub-array, five high-frequency radiation units 2 are included between two adjacent low-frequency radiation units 1.

It should be noted that, since the operating frequency bands of the high and low frequency radiation units are different according to actual conditions, the values of n, D, and L can be determined according to actual conditions, and the embodiments of the present disclosure do not specifically limit this.

It should be noted that due to the different working frequency bands of the high and low frequency radiation units, the size of the low frequency radiation unit 1 is larger than the size of the high frequency radiation unit 2. Therefore, any polarization direction of the low frequency radiation unit is the same as any one of the high frequency radiation unit. The angle between the polarization directions is ±45°.

For any two adjacent rows in the multi-frequency antenna array, any high-frequency radiation unit 2 in the first row is located on the central axis of the connection line between two adjacent high-frequency radiation units 2 in the second row ; Any low-frequency radiation unit 1 in the first row is located on the central axis of the line between two adjacent low-frequency radiation units 1 in the second row.

Specifically, for two adjacent multi-frequency fusion sub-arrays, the radiation units 2 included in the above-mentioned two multi-frequency fusion sub-arrays are not aligned, but are misaligned. The misalignment displacement of the high-frequency radiation unit 2 is 0.5L, and the misalignment displacement of the low-frequency radiation unit 1 is 0.5×n×L (for example, when n=5, it is 2.5L).

It is understandable that, in addition to the row located at the edge of the antenna array, the low-frequency radiation unit 1 in any row is adjacent to the two high-frequency radiation units 2 in the row, and each of the two rows adjacent to the row is also adjacent to the two high-frequency radiation units 2 in the row. There is a high-frequency radiation unit 2 adjacent to the low-frequency radiation unit 1. That is to say, except for the row at the edge of the antenna array, the low-frequency radiating unit 1 in any row is adjacent to the four low-frequency radiating units 1; the low-frequency radiating unit 1 in the row at the edge of the antenna array is adjacent to the three low-frequency radiating units 1 Adjacent. The vibrator arm of the low-frequency radiation unit 1 is usually cross-shaped. Therefore, the four high-frequency radiation units 2 adjacent to the low-frequency radiation unit 1 are respectively located in the four parts of the space divided by the vibrator arm of the low-frequency radiation unit 1.

In the embodiments of the present disclosure, through the misalignment distribution of two adjacent rows of high-frequency radiation units, the low-frequency radiation units are located on the central axis of the adjacent high-frequency radiation units, which can effectively reduce the coupling effect between each frequency and make the multi-frequency antenna array The influence between the radiating elements in the radiator is significantly reduced, which can significantly improve the performance index of the multi-frequency antenna array. In addition, it can realize the array fusion of high and low frequency and the spatial multiplexing of the boundary of the high and low frequency array. Under the condition that the gain of each frequency of the antenna array is unchanged, the antenna radiation aperture area can be greatly reduced.

Based on the content of the foregoing embodiments, when viewed from the front of the multi-frequency antenna array, the projections of any high-frequency radiation unit and any low-frequency radiation unit do not overlap.

Specifically, looking down from the front of the multi-frequency antenna array, the projections of any high-frequency radiation unit and any low-frequency radiation unit on the bottom surface do not overlap.

It is understandable that the distance between any two high-frequency radiation units is greater than the size of the high-frequency radiation unit, and the distance between any two low-frequency radiation units is greater than the size of the low-frequency radiation unit, so any two high-frequency radiation units are The projections of the bottom surface do not overlap, and the projections of any two low-frequency radiation units on the bottom surface do not overlap.

Therefore, the antenna array adopted by the embodiments of the present disclosure does not have the problem of stacking high and low frequency radiation units on each other, so the coupling effect and impedance deviation can be further reduced.

In the embodiments of the present disclosure, by setting the high-frequency and low-frequency radiation units so that the projections do not overlap each other, the coupling effect and impedance deviation can be further reduced, thereby further improving the performance index of the multi-frequency antenna array.

Fig. 2 is a schematic structural diagram of a low-frequency radiation unit in a multi-frequency antenna array provided according to an embodiment of the present disclosure. Based on the content of the foregoing embodiments, as shown in FIG. 2, the low-frequency radiation unit includes two dipoles arranged orthogonally.

Specifically, two mutually independent dipoles are distributed orthogonally.

For any dipole, the dipole includes a top 11, two vertical baluns 12, and a base 13.

Specifically, for any dipole, the top 11 of the dipole includes two half-wave oscillator arms and a connecting mechanism.

The dipole can be made of metallic materials.

The two half-wave vibrators, the two vertical baluns 12 and the base 13 may be integrally formed.

Both half-wave vibrator arms are straight lines. The two half-wave vibrator arms are located on the same horizontal plane and are spaced apart in the same direction, and they are connected by a connecting mechanism. The horizontal plane where the connecting structure is located is higher than the horizontal plane where the half-wave vibrator arm is located.

It should be noted that the four half-wave oscillator arms of the two dipoles are located on the same horizontal plane; among the two dipoles, the horizontal plane where the connecting mechanism of one dipole is located is higher than the connecting mechanism of the other dipole. The horizontal plane makes the two dipoles independent and disconnected from each other.

It should be noted that, among the two dipoles, the half-wave oscillator arm of one dipole is perpendicular to the half-wave oscillator arm of the other dipole.

The base 13 includes two inclined sections and a connecting piece; the upper end of the inclined section is connected with the lower end of a vertical balun 12; the lower end of the inclined section is inclined to the outside of the low-frequency radiation unit; the lower ends of the two inclined sections are connected by the connecting piece.

Specifically, the base 13 includes two triangular bending shapes, and the bending shape is composed of an inclined section and a connecting piece.

By bending the space distance, the electrical length of the vibrator balun is increased, so that the sum of the electrical length paths between the vertical balun 12 and the radiating unit base 13 is about 0.25λ ₀ .

Among them, λ ₀ represents the wavelength corresponding to the center frequency of the low-frequency radiation unit.

It can be understood that the length of the vertical balun 12 is less than 0.25λ ₀ .

Through the bending structure, the vertical height of the low-frequency radiation unit can be reduced to a certain extent while the electrical length of the actual vibrator balun is maintained at 0.25λ _0. For example, the vertical height of the low-frequency radiation unit can be reduced to 0.18～0.2λ ₀ , and the design of the low-frequency half-wave oscillator can be realized under the condition that the vertical height of the radiation unit is 0.18～0.2λ _{0, which effectively reduces the low-frequency radiation unit.} height.

A certain angle is formed between the inclined section and the vertical balun, preferably an obtuse angle.

A certain angle is formed between the inclined section and the connecting member, preferably an acute angle.

The embodiment of the present disclosure adopts a triangular bending structure on the base part of the low-frequency radiating unit, which can reduce the height of the low-frequency radiating unit. On the one hand, it can realize the miniaturization of the low-frequency radiating unit, effectively reduce the thickness and size of the antenna array, and realize the Jiazhen antenna The miniaturization, on the other hand, can reduce the distance between the high-frequency radiation unit and the radome, reduce the influence of the radome on the radiation performance of the high-frequency radiation unit, and improve the performance index of the antenna array.

Based on the content of the above embodiments, the two dipoles are the first dipole and the second dipole; the connecting piece of the first dipole bypasses the connecting piece of the second dipole from above, so that the two Do not touch each other.

Specifically, the connecting piece of the first dipole may include an upwardly arched bending structure to bypass the connecting piece of the second dipole from above, so that the connecting piece of the two dipoles is misaligned in space. , To realize that the two dipoles are independent of each other and not connected.

The gap of the above-mentioned displacement in the space height may be 2 to 4 mm.

In the embodiments of the present disclosure, the connecting piece of the first dipole bypasses the connecting piece of the second dipole from above, so that the two do not touch each other, which can ensure the radiation performance of the low-frequency radiation unit, thereby ensuring the performance index of the antenna array .

Based on the content of the foregoing embodiments, the connecting member of the first dipole includes a first horizontal section, a first connecting section, a second horizontal section, a second connecting section, and a third horizontal section that are connected in sequence; the second dipole The connecting piece includes the fourth horizontal section, the third connecting section, the fifth horizontal section, the fourth connecting section and the sixth horizontal section which are connected in sequence; the second horizontal section is higher than the fifth horizontal section; the fifth horizontal section is higher than the first Four horizontal sections; the first horizontal section, the third horizontal section and the sixth horizontal section are all at the same height as the fourth horizontal section.

Specifically, as shown in FIG. 2, the connecting member of the first dipole and the connecting member of the second dipole may both be arched upward in a "several" shape.

For the connecting piece of the first dipole, the "several" shape is composed of a first horizontal section, a first connecting section, a second horizontal section, a second connecting section, and a third horizontal section that are connected in sequence. The arched portion 14 is the second horizontal section. Therefore, the lower surface of the second horizontal section is higher than the upper surfaces of the first horizontal section and the third horizontal section.

For the connecting piece of the second dipole, the "several" shape is composed of a fourth horizontal section, a third connecting section, a fifth horizontal section, a fourth connecting section and a sixth horizontal section which are connected in sequence. The arched portion 14 is the fifth horizontal section. Therefore, the lower surface of the fifth horizontal section is higher than the upper surfaces of the fourth and sixth horizontal sections.

The connecting piece of the first dipole bypasses the connecting piece of the second dipole from above, so the lower surface of the second horizontal section is higher than the upper surface of the fifth horizontal section.

It should be noted that the lower surfaces of the first horizontal section, the third horizontal section, the fourth horizontal section, and the sixth horizontal section are located on the same horizontal plane.

In the embodiments of the present disclosure, the connecting section of the two dipoles is arched upward in the shape of a "several" shape, so that the two dipoles do not touch each other, which can ensure the radiation performance of the low-frequency radiation unit, thereby ensuring the antenna array Performance.

Based on the content of the foregoing embodiments, the first horizontal section, the third horizontal section, the fourth horizontal section, and the sixth horizontal section are all provided with downward bosses 15.

Specifically, the boss 15 may be circular.

The height of the boss 15 can be selected according to actual conditions, for example, it can be 1 mm.

The boss 15 can be made of a metal material.

The distance between the boss 15 on the first horizontal section and the boss 15 on the third horizontal section may be 0.12-0.17λ ₀ .

The distance between the boss 15 on the fourth horizontal section and the boss 15 on the sixth horizontal section may be 0.12-0.17λ ₀ .

The boss 15 is used to connect the low-frequency radiation unit 1 and the reflective bottom plate 3. On the one hand, the low-frequency radiation unit 1 is fixed on the reflective bottom plate 3, and on the other hand, conduction between the low-frequency radiation unit 1 and the reflective bottom plate 3 can be realized.

The embodiment of the present disclosure is provided with a boss for connecting the low-frequency radiating unit and the reflective bottom plate, so that the low-frequency radiating unit and the reflective bottom plate can be more firmly connected and potential conduction, thereby ensuring the radiation performance of the low-frequency radiating unit and the antenna array. Performance.

Based on the content of the foregoing embodiments, the multi-frequency antenna array further includes a reflective bottom plate 3. Each boss 15 is connected to the reflective bottom plate 3 by a metal fastener.

Specifically, each boss 15 and the reflective bottom plate 3 can be connected by metal fasteners, which can ensure that the contact points of the low-frequency radiation unit 1 and the reflective bottom plate 3 are electrically connected to the reflective bottom plate 3.

The embodiment of the present disclosure connects the boss and the reflective bottom plate through metal fasteners to ensure the electrical potential conduction between each contact point and the reflective bottom plate, and can ensure the radiation performance of the low-frequency radiation unit, thereby ensuring the performance index of the antenna array.

FIG. 3 is a schematic structural diagram of a multi-frequency antenna array provided according to an embodiment of the present disclosure; FIG. 4 is a partial schematic diagram of FIG. 3. Based on the content of the foregoing embodiments, as shown in FIG. 4, a radiation guide ring 21 is provided above each high-frequency radiation unit adjacent to the low-frequency radiation unit; the top surface of the radiation guide ring 21 and the low-frequency radiation unit 1 The top surface is contoured.

Specifically, as shown in FIG. 3, the low-

frequency radiation units

100, 101, 102, and 103 constitute a low-frequency radiation sub-array, and the high-frequency radiation units 200-209 constitute a first linear array high-frequency radiation sub-array, and the high-frequency radiation units 210- 219 forms the second linear array high-frequency radiation sub-array; high-frequency radiation units 220-229 form the third linear array high-frequency radiation sub-array.

In the first linear array high-frequency radiation sub-array and the second linear array high-frequency radiation sub-array, the distribution intervals of the high-frequency radiation units are both L. L=0.7～1.1λ ₁ , λ ₁ represents the wavelength corresponding to the center frequency of the high-frequency radiation unit.

The distance between the axis of the first linear array high-frequency radiation sub-array and the axis of the second linear array high-frequency radiation sub-array is D. D=0.5～0.7λ ₁ , λ ₁ represents the wavelength corresponding to the center frequency of the high-frequency radiation unit.

The low-

frequency radiation units

100 and 102 are located on the axis of the first linear array high-frequency radiation sub-array, and the low-

frequency radiation units

101 and 103 are located on the axis of the second linear array high-frequency radiation sub-array.

The distance between the low-

frequency radiation units

100 and 101, between the low-

frequency radiation units

101 and 102, and between the low-

frequency radiation units

102 and 103, along the axis of the first linear array high-frequency radiation sub-array is 2.5L (assuming that , The ratio of the center frequency of the high-frequency radiation unit to the center frequency of the low-frequency radiation unit is approximately equal to 2.5).

As shown in FIG. 4, the tops 11 of the two dipoles of the low-frequency radiation unit 101 are arranged orthogonally. The low-frequency radiation unit 101 is located at the midpoint of the connection line between the high-

frequency radiation units

213 and 214, and is also located at the midpoint of the connection line between the high-

frequency radiation units

203 and 223. The four high-

frequency radiation units

213, 214, 203, and 223 are evenly distributed on the top 11 of the low-frequency radiation unit 101 in the four parts of the divided space, and the projections of the high-frequency and low-frequency radiation units on the bottom surface do not overlap.

Among them, the radiation guide ring 21 is installed above the high-

frequency radiation units

213, 214, 203, and 223 around the low-frequency radiation unit 101, and at the same height as the top 11 of the low-frequency radiation unit 101, to improve the high-frequency radiation unit. The role of radiation performance.

The radiation guide ring 21 is installed above the high-frequency radiation unit through an insulating support. The top surface of the radiation guide ring 21 may be on the same horizontal plane as the top surface of the half-wave oscillator arm of the low-frequency radiation unit, or on the same horizontal plane as the top surface of the connection structure of the low-frequency radiation unit.

It should be noted that any high-frequency radiation unit that is not adjacent to the low-frequency radiation unit (for example, the high-

frequency radiation unit

202, 204, 212, 224, etc.) is not provided with a radiation guide ring above it.

In the embodiments of the present disclosure, a radiation guide ring is arranged above each high-frequency radiation unit adjacent to the low-frequency radiation unit, so that the radiation performance of the high-frequency radiation unit can be improved, and the performance index of the antenna array can be improved.

Based on the content of the foregoing embodiments, the outer diameter of the radiation guide ring is 0.24 to 0.28λ ₁ , and the inner diameter of the radiation guide ring is 0.12 to 0.18λ ₁ .

Specifically, the radiation guide ring has a circular ring structure, and specifically may be a sheet-shaped circular ring structure.

The radiation guide ring can be made of metallic material.

The outer diameter of the annular structure can be 0.24～0.28λ ₁ , and the inner diameter is 0.12～0.18λ ₁ , so as to further improve the radiation performance of the high-frequency radiation unit.

In the embodiments of the present disclosure, by setting the inner and outer diameters of the radiation guide ring, the radiation performance of the high-frequency radiation unit can be further improved, and the performance index of the antenna array can be further improved.

Based on the content of the foregoing embodiments, the space between each high-frequency radiation unit adjacent to the low-frequency radiation unit and the reflective bottom plate is filled with an insulating material.

Specifically, for each high-frequency radiation unit adjacent to the low-frequency radiation unit, the space between the high-frequency radiation unit and the reflective bottom plate is filled with an insulating material, that is, there is no electric potential conduction. Filled with insulating material, the reflective bottom plate can carry and fix the low-frequency radiation unit.

It should be noted that, for each high-frequency radiation unit that is not adjacent to the low-frequency radiation unit, the high-frequency radiation unit is connected to the reflective bottom plate to fix the high-frequency radiation unit on the reflective bottom plate, and the high-frequency radiation unit It is connected with the reflective bottom plate through a conductor to realize electric potential conduction.

The embodiments of the present disclosure can effectively reduce the mutual coupling effect and impedance deviation by filling the high-frequency radiation unit adjacent to the low-frequency radiation unit with the reflective bottom plate with insulating material, and realize the improvement of the performance of the frequency array of the fusion antenna.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions recorded in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

A multi-frequency antenna array, characterized in that, each row in the multi-frequency antenna array includes a plurality of high-frequency radiation units and a plurality of low-frequency radiation units; the axis distance between two adjacent rows is D;

For any row in the multi-frequency antenna array, the distance between the centers of two adjacent high-frequency radiating elements is L; the distance between the centers of two adjacent low-frequency radiating elements is n×L; The radiating unit is located at the midpoint of the connection line between two high-frequency radiating units adjacent to any one of the low-frequency radiating units;

For any two adjacent rows in the multi-frequency antenna array, any high-frequency radiation unit in the first row is located on the central axis of the connection line between two adjacent high-frequency radiation units in the second row ; Any low-frequency radiation unit in the first row is located on the central axis of the line between two adjacent low-frequency radiation units in the second row;

Among them, L=0.7～1.1λ 1 , D=0.5～0.7λ 1 , λ 1 represents the wavelength corresponding to the center frequency of the high-frequency radiating unit; n is the difference between the center frequency of the high-frequency radiating unit and the center frequency of the low-frequency radiating unit The nearest integer to 2 times the ratio.
The multi-frequency antenna array according to claim 1, wherein when viewed from the front of the multi-frequency antenna array, the projections of any high-frequency radiation unit and any low-frequency radiation unit do not overlap.
The multi-frequency antenna array according to claim 1 or 2, wherein the low-frequency radiation unit comprises two dipoles arranged orthogonally;

For any one of the dipoles, the dipole includes a top, two vertical baluns, and a base;

The base includes two inclined sections and a connecting piece;

The upper end of the inclined section is connected with the lower end of a vertical balun; the lower end of the inclined section is inclined toward the outside of the low-frequency radiation unit; the lower ends of the two inclined sections are connected by the connecting member.
The multi-frequency antenna array according to claim 1 or 2, wherein a radiation guide ring is provided above each high-frequency radiation unit adjacent to the low-frequency radiation unit;

The top surface of the radiation guide ring is the same height as the top surface of the low-frequency radiation unit.
The multi-frequency antenna array according to claim 3, wherein the two dipoles are a first dipole and a second dipole;

The connecting piece of the first dipole bypasses the connecting piece of the second dipole from above, so that the two do not contact each other.
The multi-frequency antenna array according to claim 5, wherein the connecting member of the first dipole comprises a first horizontal section, a first connecting section, a second horizontal section, a second connecting section and The third level

The connecting piece of the second dipole includes a fourth horizontal section, a third connecting section, a fifth horizontal section, a fourth connecting section, and a sixth horizontal section that are connected in sequence;

The second horizontal section is higher than the fifth horizontal section; the fifth horizontal section is higher than the fourth horizontal section; the first horizontal section, the third horizontal section, and the sixth horizontal section , All have the same height as the fourth horizontal section.
The multi-frequency antenna array according to claim 6, wherein the first horizontal section, the third horizontal section, the fourth horizontal section and the sixth horizontal section are all provided with downwards Of the boss.
The multi-frequency antenna array according to claim 7, further comprising a reflective bottom plate;

Each of the bosses is connected to the reflective bottom plate by a metal fastener.
8. The multi-frequency antenna array according to claim 8, wherein the space between each high-frequency radiation unit adjacent to the low-frequency radiation unit and the reflective bottom plate is filled with an insulating material.
The multi-frequency antenna array according to claim 4, wherein the outer diameter of the radiation guide ring is 0.24 to 0.28λ 1 , and the inner diameter of the radiation guide ring is 0.12 to 0.18λ 1 .