CN112821044B

CN112821044B - Radiation unit, antenna and base station

Info

Publication number: CN112821044B
Application number: CN202011639656.XA
Authority: CN
Inventors: 姜维维; 成阳; 黄立文; 黄文铿
Original assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd; Jingxin RF Technology Guangzhou Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2023-02-28
Anticipated expiration: 2040-12-31
Also published as: CN112821044A

Abstract

The invention provides a radiation unit, an antenna and a base station, wherein the radiation unit comprises two dipoles which are orthogonally arranged in polarization, each dipole comprises two opposite radiation arms, each radiation arm is arranged in a surrounding mode so as to feed electricity to a surrounding central area, each radiation arm comprises a feed part and radiation lines, the feed part is formed at the position, corresponding to the central area, of each radiation arm, each radiation line comprises a linear body and at least one filtering unit, the linear body is connected with the feed part to form a closed loop structure, and the filtering units are formed by bending the linear body in a reciprocating mode. The radiating unit is used for filtering high-frequency harmonic waves by arranging the filtering units on the two radiating arms of the dipole, so that the problem of mutual coupling caused by the close distance between the radiating units is solved.

Description

Radiation unit, antenna and base station

Technical Field

The invention relates to the technical field of mobile communication, in particular to a radiating unit, an antenna configured with the radiating unit and a base station configured with the antenna.

Background

With the continuous commercial use of 5G communication technology, the frequency bands and the number of radiating elements required in a base station are greatly increased, and miniaturized, multiband and multi-system base station antennas increasingly become mainstream antennas applied in the communication industry.

The base station antenna comprises a plurality of frequency band radiating units, the radiating units of the plurality of frequency bands can be mutually coupled and interfered, especially, the low-frequency radiating unit can cause serious coupling interference to the high-frequency radiating unit, especially, the influence on the directional diagram index is caused, and the performance of the base station antenna is seriously restricted by the problems. Therefore, there is a need for a low-frequency radiating element that can filter high-frequency harmonics and has little interference with the high-frequency radiating element.

Disclosure of Invention

A first object of the present invention is to provide a radiation unit capable of filtering high frequency harmonics.

Another object of the present invention is to provide an antenna.

Still another object of the present invention is to provide a base station.

In order to meet the purpose of the invention, the invention adopts the following technical scheme:

the first object of the present invention is to provide a radiating element, which includes two dipoles orthogonally arranged with polarization, each dipole includes two opposite radiating arms, each radiating arm is arranged to surround a surrounding central area, each radiating arm includes a feeding portion and a radiating line, the feeding portion is formed at the position of the radiating arm corresponding to the central area, the radiating line includes a linear body and at least one filtering unit, the body and the feeding portion are connected to form a closed loop structure, and the filtering unit is formed by bending the body back and forth.

Furthermore, the filtering unit forms a plurality of extension branches formed by reciprocating bending, and two adjacent extension branches form transition branches by end-to-end connection.

Furthermore, the transition branch knot is in a linear or arc shape.

Further, the extension branch is obliquely arranged relative to the body of the radial line.

Further, each filter unit is configured to be symmetrical about a parallel axis of a reciprocating direction thereof, and/or is configured to be symmetrical about a parallel axis of a line connecting the radiation main bodies on both sides thereof.

Preferably, the filter unit has a central symmetrical structure with respect to a geometric center thereof.

Specifically, a reciprocating part is formed by single reciprocating bending of the radiation line body, the filtering unit comprises a plurality of reciprocating parts, and the reciprocating parts are closely adjacent to each other in a transition connection mode.

Further, the radiation line includes a plurality of the filter units, and the filter units are disposed at a distance from each other.

Furthermore, the filtering units may have the same and/or different structures.

Further, the strokes in the respective reciprocating directions are the same and/or different between different filter units.

Further, in the same dipole, the respective filter units are arranged in a symmetrical/asymmetrical manner with respect to each other.

Specifically, the bending widths of different filter units are the same and/or different.

Furthermore, the radiation arm is formed by hollowing out the same metal sheet, and an invagination groove is formed in the middle of the radiation arm.

Furthermore, the inward concave groove is in a regular symmetrical shape of any one of a triangle, a rectangle, a square, a polygon and a gourd shape.

Specifically, the feeding portion of the radiating arm is in a block shape, and a part of the feeding portion is hollowed to form an electric connection hole.

Specifically, the radiation unit further includes a dielectric plate, the two dipoles are printed on the dielectric plate, and a via hole for realizing feeding to each radiation arm of the two dipoles through balun insertion is reserved in the dielectric plate.

Furthermore, the dielectric plate is supported by a pair of mutually-crossed baluns, wherein the two baluns are provided with insertion tongues to penetrate through corresponding through holes on the dielectric plate to support the dielectric plate, and a feeder line laid on each insertion tongue is electrically connected with the feed portion of one corresponding radiation arm.

Preferably, the radiation unit is used for passing low-frequency signals.

Another object of the present invention is to provide an antenna including a reflection plate, a low frequency radiation element row, and a high frequency radiation element row, each of the radiation element rows including a plurality of radiation elements fed in parallel to each other, characterized in that: the radiation units in the low-frequency radiation unit column adopt the radiation units described in the first aim.

Further, the low-frequency radiating element array and the high-frequency radiating element array are arranged in a collinear mode along the same axis.

Another object of the present invention is to provide a base station, comprising: the base station is provided with an antenna as described for said further purpose for transmitting signals communicated by the base station.

Compared with the prior art, the invention has the following advantages:

first, the radiating element of the present invention includes two dipoles orthogonally disposed with polarization, each dipole includes two opposite radiating arms, each radiating arm has a filter unit for filtering high frequency harmonics, the filter unit can solve the mutual coupling problem caused by too close radiating elements, improve the directional diagram index of the radiating element, and is more beneficial to the performance index of the antenna especially when the radiating element of the present invention and the high frequency band radiating element are disposed in a common antenna.

And secondly, the radiation arms of the dipoles of the radiation unit form a closed loop structure by the feed part and the radiation lines, so that the area of the radiation unit is reduced, an electric transmission path is extended, and the working bandwidth of the radiation unit is improved.

And the filtering unit of the radiation arm of the radiation unit is formed by bending the linear body in a reciprocating way, so that the radiation unit is simple in structure and convenient to produce and manufacture.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a radiation unit of the present invention mounted on a dielectric plate.

Fig. 2 is a schematic structural diagram of a radiation unit according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a filter unit of a radiation arm of a radiation unit according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a filter unit of a radiation arm of a radiation unit according to another embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a filter unit of a radiation arm of a radiation unit according to another embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a filter unit of a radiation arm of a radiation unit according to still another embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a radiation unit according to another embodiment of the present invention.

Fig. 8 is a schematic diagram of a balun structure of the radiation unit of the present invention, wherein the left side shows a front side of the dielectric plate of the balun, and the right side shows a back side of the dielectric plate of the balun.

Fig. 9 is a schematic diagram of an arrangement relationship in an application example of the radiation elements of the antenna of the present invention.

Fig. 10 is a horizontal radiation pattern of a high-frequency radiation element in the vicinity of a test antenna when it uses a general low-frequency radiation element.

Fig. 11 is a horizontal radiation pattern of a high-frequency radiation element in the vicinity thereof when a test antenna uses the radiation element of the present invention.

Detailed Description

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the invention.

It should be understood that the various steps recited in method embodiments of the present invention may be performed in a different order, and/or performed in parallel. Moreover, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the invention is not limited in this respect.

The term "include" and variations thereof as used herein are open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing the devices, modules or units, and are not used for limiting the devices, modules or units to be different devices, modules or units, and are not used for limiting the sequence or interdependence relationship of the functions executed by the devices, modules or units.

The invention provides a radiating element adapted to operate at a low frequency, preferably in a range between 620MHz and 960MHz, with a relative bandwidth of 43%. The radiation unit can be used for filtering high-frequency harmonic waves and avoiding mutual coupling interference among adjacent radiation units, particularly the coupling interference on the high-frequency radiation units.

In an exemplary embodiment of the present invention, referring to fig. 1, the radiating element 10 includes a dielectric plate 20, two dipoles 40, and a pair of baluns 30. Two dipoles 40 are arranged on the front surface of the dielectric plate 20 in a polarization orthogonal manner to radiate signals to the outside; a pair of baluns 30 is provided on the opposite side of the dielectric sheet 20 for supporting the dielectric sheet 20 and feeding the two dipoles 40.

With reference to fig. 1 and 2, each dipole 40 includes two radiating arms 41, the two radiating arms 41 are disposed opposite to each other, and the two radiating arms 41 are connected in parallel to receive signals fed from the same feeding point.

The two dipoles 40 are arranged with orthogonal polarizations, the orthogonal centers of the two dipoles 40 being referred to as the surrounding centers. The four radiating arms 41 corresponding to the two dipoles 40 are arranged around the surrounding center. A cross-shaped groove is provided between the four radiation arms 41 to partition the four radiation arms 41.

The radiating arm 41 includes a feeding portion 411 and a radiating line 412, and the feeding portion 411 and the radiating line 412 are connected to form a closed loop structure.

The feeding portion 411 is correspondingly disposed at one end of the radiating arm 41 close to the surrounding central area, and is used for electrically connecting a feeding point to receive a signal fed into the radiating arm 41.

The radiation line 412 is a continuous line-shaped body, and the line-shaped body is bent into different shapes to form structures with different electrical properties.

A linear body of the radiation line 412 is bent to form a filtering unit 413, the filtering unit 413 is used for filtering high-frequency harmonics, and the non-bent linear body of the radiation line 412 is a connecting line 416, that is, the connecting line 416 and the filtering unit 413 are connected with each other to form the radiation line 412.

Specifically, the filtering unit 413 is formed by repeatedly bending a section of linear body, and the section of linear body is repeatedly bent to form a plurality of extension branches 414 and a plurality of transition branches 415 for connecting the plurality of extension branches. That is, a section of the linear body bent to form the filtering unit 413 is further divided into a plurality of small sections, and the plurality of small sections of the linear body are bent to form the extending branches 414 or the transition branches 415 for connecting the adjacent extending branches 414. Specifically, the filtering unit 413 includes a plurality of extension branches 414 formed by bending the linear body, and a plurality of transition branches 415 connecting adjacent extension branches 414.

The transition branch 415 may be formed of a linear body having a straight line shape or a linear body having an arc shape.

The extending branches 414 can be formed by bending a small segment of the linear body one or more times, and different extending branches 414 can be formed by bending the small segment of the linear body back and forth in different directions.

Specifically, when the linear body forming the extension branch 414 is bent once with respect to the connection line 416, a linear extension branch 414 is formed, when the linear body forming the extension branch 414 is bent twice with respect to the connection line 416, an L-shaped extension branch 414 is formed, and when the linear body forming the extension branch 414 is bent three times with respect to the connection line 416, a U-shaped extension branch 414 is formed. The specific bending times can be defined by themselves, and are not limited herein, and those skilled in the art can flexibly adapt to the present embodiment based on the specific bending times, which will not be described herein.

The extension branches 414 of the filtering unit 413 are connected by the transition branch 415, and the adjacent extension branches 414 are connected end to end, specifically, the tail end of the previous extension branch 414 is connected to the tail end of the next extension branch 414 by the transition branch 415.

The plurality of extending branches 414 of the filtering unit 413 may be bent in different directions with respect to the extending direction of the connection line 416, and if the extending direction of the connection line 416 is a horizontal direction, the plurality of extending branches 414 of the filtering unit 413 are bent in a direction perpendicular or oblique to the extending direction (horizontal direction) of the connection line 416. In particular, the extension branch 414 may be bent towards an inner direction of the radiation arm 41 on which it is located and/or bent away from an inner direction of the radiation arm 41 on which it is located.

For example, when the extension branches 414 of the filter are in a straight line shape, the extension branches 414 are all bent toward the inner direction of the radiation arm 41 where the extension branches 414 are located, and the two extension branches 414 are connected by the transition branch 415 to form a U-shaped structure.

When the extension branches 414 of the filtering unit 413 are U-shaped, one of the two adjacent extension branches 414 bends toward the inner direction of the radiation arm 41 where the extension branch is located, and the other extension branch 414 bends toward the inner direction of the radiation arm 41 where the extension branch is located, so that the two extension branches 414 form an S-shaped structure.

Each extension branch 414 of the filtering unit 413 may extend by different lengths in the extension direction thereof to form extension branches 414 of different lengths. For example, when the extension branches 414 are in a straight shape, the extension length of one extension branch 414 of the filtering unit 413 is 10mm, and the extension length of the other extension branch 414 is 12mm, so that the extension branches 414 of the filtering unit 413 have different lengths.

However, in the exemplary embodiment of the present invention, each of the extension branches 414 of the filtering unit 413 has the same structure, and is bent toward the inner direction of the radiation arm 41, and the extension branches 414 are parallel and symmetrical to each other. Each extension branch 414 has the same extension length to form the same extension branch 414.

Each extension branch 414 of the filtering unit 413 may be separated by the same or different distance, so that the filtering unit 413 has a symmetrical structure or an asymmetrical structure, and the length of the filtering unit 413 may also be extended.

In the exemplary embodiment of the invention, the plurality of extension branches 414 of the filtering unit 413 have the same spacing to form a symmetrical filtering unit 413, and since each extension branch 414 extends in the same direction and has the same extension length, the filtering unit 413 has a central symmetrical structure.

Each filtering unit 413 is composed of a plurality of extension branches 414, and the number of the extension branches 414 of the filtering unit 413 can be set according to the required filtering performance.

Specifically, the filter unit 413 formed by the extension branches 414 may be equivalent to a parallel LC circuit, and increasing the number of the extension branches 414 of the filter unit 413 or extending the extension length of the extension branches 414 may increase the inductance value in the equivalent circuit, so that the frequency point of the filter unit 413 moves toward a high frequency; by increasing the width of the transition branch 415 connecting the two adjacent extension branches 414, the capacitance value in the equivalent circuit can be reduced, so that the frequency point of the filtering unit 413 moves to a high frequency; that is, the center frequency of the filtering unit 413 can be adjusted by adjusting the number of the extension branches 414 of the filtering unit 413 and/or the extension length of the extension branches 414 and/or the width of the transition branch 415.

In the exemplary embodiment of the present invention, a straight-line-shaped extension branch 414 is selected, each extension branch 414 faces the same direction inside the radiation arm 41 where it is located, each extension branch 414 has the same length, the distance between each extension branch 414 is the same, the extension branches 414 are parallel to each other, and the extension branches 414 are connected by the same transition branch 415. The plurality of extended branches 414 can form different shapes of the filtering units 413, and the structural shape of the partial filtering unit 413 provided by the present invention will be disclosed below.

In the first embodiment, referring to fig. 3, each extension branch 414 of the filtering unit is disposed perpendicular to the extension direction of the connection line 416, the connection line 416 and the same end of all the extension branches 414 of the filtering unit are located on the same axis, and the transition branch 415 connecting the extension branches 414 is in the form of a straight line segment, so as to form a square wave filtering unit, which is called as a square wave filtering unit 417, of the filtering unit 413.

In a modified implementation based on embodiment 1, referring to fig. 6, the connecting line 416 is located on the same axis as the central axes of all the extension branches 414 of the filtering unit in the extension direction, and the filtering unit is called as a central square wave filtering unit 418.

In the second embodiment, referring to fig. 4, each extension branch 414 of the filtering unit is disposed perpendicular to the extending direction of the connection line 416, the connection line 416 and the same end of all the extension branches 414 of the filtering unit are located on the same axis, and the transition branch 415 connecting the extension branches 414 is in the form of an arc-shaped segment, so as to form a wavy filtering unit, which is called a wavy filtering unit 419.

In the third embodiment, referring to fig. 5, each extension branch 414 of the filtering unit is obliquely arranged relative to the extension direction of the connection line 416, specifically, the extension branch 414 forms an angle of 60 or 120 degrees with the extension direction of the connection line 416, the connection line 416 and the same end of all the extension branches 414 of the filtering unit are located on the same axis, and the transition branch 415 connected to the extension branch 414 is in the form of a straight line segment to form a filtering unit in a form of an oblique square wave, which is called as an oblique square wave filtering unit 420.

The above embodiments disclose some embodiments of the filtering unit 413 of the present invention, and those skilled in the art can flexibly adapt to the above embodiments of the present invention based on the knowledge of the above embodiments, and no further description is given here.

The radiating arms may be shaped differently by their radiating lines 412, such as forming rectangular radiating arms or triangular radiating arms or circular radiating arms.

Each radiation arm 41 may be provided with a plurality of filtering units 413, the structure of each filtering unit 413 is the same or different, the plurality of filtering units 413 are disposed at different positions on the radiation arm 41, and the plurality of filtering units 413 are disposed at the same distance or at different distances.

The four radiating arms 41 of the two dipoles 40 of each radiating element 10 can be freely configured with different structures of the filter unit 413 and the number of the filter units 413, so that the four radiating arms 41 have the same structure or different structures. It is generally preferred that the two radiating arms 41 of one dipole 40 have the same structure.

In an exemplary embodiment of the present invention, referring to fig. 7, the radiating arms 41 are rectangular, and the filter units 413 are arranged on the radiating arms 41 in pairs, and each pair of filter units 413 is symmetrical along the polarization direction of the dipole 40 where the radiating arms 41 are located.

The four sides of the radiation arm 41 where the radiation line 412 forms a rectangular shape are a first side 431, a second side 432, a third side 433, and a fourth side 434, respectively, where the first side 431 and the third side 433 are parallel to each other, the second side 432 and the fourth side 434 are parallel to each other, the first side 431 is perpendicular to the second side 432 and the fourth side 434, and the second side 432 is perpendicular to the first side 431 and the third side 433. A dummy connection line between an angle formed between the first side 431 and the fourth side 434 and an angle formed between the second side 432 and the third side 433 is disposed along the polarization direction. It is generally preferred that each pair of filtering units 413 is disposed on the first and

fourth sides

431 and 434, respectively, or on the second and

third sides

432 and 433, respectively, such that each pair of filtering units 413 is symmetrical to each other in the polarization direction.

In an exemplary embodiment of the present invention, referring to fig. 2, a pair of square wave filtering units 417 is disposed on the radiating arm 41, the pair of filtering units 413 is disposed on the second side 432 and the third side 433, respectively, and the pair of filtering units 413 is symmetrically disposed along the polarization direction. Referring to fig. 11, in order to use the radiation unit 10 of the present embodiment, the horizontal radiation pattern of the high frequency radiation unit 10 disposed near the radiation unit 10; referring to fig. 10, which is a horizontal radiation pattern of the high-frequency radiation unit 10 disposed near the normal radiation unit 10 when the normal radiation unit 10 is used, comparing fig. 11 and fig. 10, it can be seen that the radiation performance of the radiation unit 10 of the present embodiment is significantly better than that of the normal radiation unit 10, and the radiation unit 10 of the present embodiment does not substantially affect the radiation performance of the high-frequency radiation unit 10.

In another embodiment, referring to fig. 7, the four radiating arms 41 of the radiating element 10 are all of different configurations. For convenience of description, the four radiation arms 41 are referred to as a first radiation arm 436, a second radiation arm 437, a third radiation arm 438, and a fourth radiation arm 439, respectively.

The first radiation arm 436 is provided with four filter units, and each edge of the first radiation arm is provided with one filter unit. The filtering unit on the first side 431 is a mid-square filtering unit 418; the filter unit on the second side 432 is a wave filter unit 419; the filtering unit on the third side 433 is a square wave filtering unit 417; the filtering unit on the fourth side 434 is the mid-square filtering unit 418. The structure of the middle square wave filter unit 418 on the first side 431 is the same as that of the middle square wave filter unit 418 on the fourth side 434, specifically, the extension lengths of the extension branches 414 are the same, and the number of the extension branches 414 is also the same. The middle square wave filter unit 418 on the first side 431 and the middle square wave filter unit 418 on the fourth side 434 are symmetrical to each other along the polarization direction.

The second radiating arm 437 has a similar structure to the first radiating arm 436, but the filter unit on the second side 432 of the second radiating arm 437 is the square wave filter unit 418, and the extension length of the extension branch 414 of the square wave filter unit 418 on the second side 432 is greater than the extension length of the extension branches 414 on the first side 431 and the fourth side 434.

The structure of the third radiating arm 438 is similar to that of the first radiating arm 436, but the filter units on the second side 432 and the third side 433 are square wave filter units 417 with the same structure and pattern, and the extension lengths of the extension branches 414 of the square wave filter units 417 on the second side 432 and the third side 433 are longer than those of the extension branches 414 of the first side 431 and the fourth side 434. The third radiating arms 438 are symmetrical to each other along the polarization direction.

The fourth radiating arm 439 has a similar structure to the second radiating arm 437, but the filtering unit on the third side 433 is a wave filtering unit 420 and a square wave filtering unit 417.

Thus, the radiation element 10 in this embodiment has four radiation arms with different structures, each radiation arm having a different filter element thereon. Those skilled in the art will appreciate that the radiation unit 10 with different structures can be flexibly applied on the basis of this embodiment, and detailed description thereof is omitted here.

Referring to fig. 2, the feeding portion 411 is used for receiving signals fed from the outside, and the feeding portion 411 of the radiating arm 41 is connected to two ends of the radiating line 412, so that the radiating arm 41 forms a closed loop.

The feeding portions 411 of the two radiation arms 41 of each dipole 40 are oppositely disposed, and specifically, the feeding portions 411 are disposed at one ends of the radiation arms 41 close to the surrounding center. Each of the four radiation arms 41 of the two dipoles 40 of the radiation unit 10 is disposed at one end of the respective radiation arm 41 near the surrounding center. Each radiating arm 41 is provided with one electrical connection hole 435, and the four radiating arms 41 have four electrical connection holes 435, and the four electrical connection holes 435 are used for electrically connecting the power feed of the balun 30. Preferably, the power feeding unit 411 has a block shape.

The radiation line 412 of the radiation arm 41 and the feeding portion 411 form a closed loop, and the inner recess 44 is formed in the closed loop. The recessed groove 44 may be in a regular symmetrical shape of any one of a triangle, a rectangle, a square, a polygon and a gourd shape. The dielectric plate 20 of the radiating element 10 is used for printing the radiating arm 41, and the dielectric plate 20 is provided with a via hole 21 corresponding to the electrical connection hole 435 of the radiating arm 41 for plugging the balun 30. Preferably, the radiation arm 41 is formed by hollowing out a metal sheet.

A pair of baluns 30 of the radiating element 10, see fig. 8, each balun 30 includes a dielectric plate 31, one end of the dielectric plate 31 is provided with a slot 34, and the two baluns 30 are orthogonally inserted into each other through the respective slots 34. Each balun 30 is further provided with two plug tongues 32, the two plug tongues 32 are used for plugging the via holes 21, and the plug tongues 32 of a pair of orthogonally arranged baluns 30 plug the via holes 21 on the dielectric plate 20 of the corresponding radiating element 10 to support the dielectric plate 20 of the radiating element 10. The balun 30 further has a feeding line 33, and the feeding line 33 extends to the two insertion tongues 32 to electrically connect the electrical connection holes 435 of the radiation arm 41 to feed power to the radiation arm 41.

In one embodiment, the radiating arm 41 is printed on the dielectric plate 20 in the form of a microstrip line or a copper material or a silver material or a gold material.

In some embodiments, although not shown, according to the spirit of the present invention, the extension branches of the filtering unit may be arranged in an arc shape with a certain arc, and the extension branches may be parallel to each other.

The present invention also provides an antenna, which includes a reflection plate, a low frequency radiation element row, and a high frequency radiation element row, referring to fig. 9. The low frequency radiating element column comprises a plurality of radiating elements 10 with filtering elements 413 as described above, which are fed in parallel with each other. The high-frequency radiation element column includes a plurality of high-frequency radiation elements 50. The high-frequency radiation unit 50 is disposed close to the radiation unit 10. In a modified embodiment, the low-frequency radiating element array and the high-frequency radiating element array are arranged in a collinear way along the same axis. The antenna adopts the radiation unit 10 of the invention as the low-frequency radiation unit, so that the harmonic wave caused by the high-frequency radiation unit 50 in the antenna can be effectively filtered, and higher bandwidth can be obtained.

The invention also provides a base station, which is provided with the antenna and receives or transmits the antenna signal of the corresponding frequency band through the antenna.

In summary, in the radiation unit of the present invention, the filtering units are disposed on the two radiation arms of the dipole, and the filtering units are used for filtering high-frequency harmonics, so as to solve the problem of mutual coupling caused by the close distance between the radiation units.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention according to the present invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is made without departing from the spirit of the invention. For example, the above features and (but not limited to) features having similar functions of the present invention are mutually replaced to form the technical solution.

Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims

1. A radiating element comprising two dipoles arranged orthogonally with a polarisation, each dipole comprising two radiating arms opposed, each radiating arm being arranged circumferentially so as to be fed around a central region of each other, characterised in that: each radiation arm comprises a feed portion and radiation lines, the feed portion is formed in the position, corresponding to the central area, of the radiation arm, the radiation lines comprise linear bodies, the bodies are connected with the feed portion to form a closed loop structure, the bodies are bent and formed in a reciprocating mode at different positions to form a plurality of filtering units, and the filtering units are different in structural style;

the filtering unit comprises a plurality of reciprocating parts, and the reciprocating parts are closely adjacent to each other in parallel and are in transitional connection.

2. The radiating element of claim 1, wherein: the filtering unit forms a plurality of extension branches formed by reciprocating bending, and transition branches are formed between two adjacent extension branches by end-to-end connection.

3. The radiating element of claim 2, wherein: the transition branch knot is in a linear or arc shape.

4. The radiating element of claim 2, wherein: the extending branch knot is obliquely arranged relative to the body of the radiant line.

5. The radiating element of claim 1, wherein: each filter unit is configured to be symmetrical about a parallel axis of a reciprocating direction thereof and/or about a parallel axis of a line connecting the radiation main bodies on both sides thereof.

6. The radiating element of claim 1, wherein: the filtering unit is in a central symmetry structure which is symmetrical about the geometric center of the filtering unit.

7. The radiating element of claim 1, wherein: the radiation line comprises a plurality of filtering units, and the filtering units are arranged at a certain distance.

8. The radiating element of claim 7, wherein: the filtering units have the same and/or different structures.

9. The radiating element of claim 7, wherein: the strokes in the respective reciprocating directions are the same and/or different between different filter units.

10. The radiating element of claim 7, wherein: in the same dipole, the respective filter units are arranged in a symmetrical/asymmetrical manner with respect to each other.

11. The radiating element of claim 7, wherein: the bending widths of different filter units are the same and/or different.

12. The radiating element of claim 7, wherein: the radiation arm is formed by hollowing out the same metal sheet, and an invagination groove is formed in the middle of the radiation arm.

13. The radiating element of claim 12, wherein: the inward recessed groove is in a regular symmetrical shape of any one of a triangle, a rectangle, a square, a polygon and a gourd shape.

14. The radiating element of claim 1, wherein: the feed portion of the radiation arm is in a block shape, and the local part of the feed portion is hollowed to form an electric connection hole.

15. The radiating element of any one of claims 1 to 14, wherein: the radiating unit further comprises a dielectric plate, the two dipoles are printed on the dielectric plate, and through holes for realizing feeding to the radiating arms of the two dipoles by balun insertion are reserved in the dielectric plate.

16. The radiating element of claim 15, wherein: the dielectric plate is supported by a pair of mutually crossed baluns, wherein the two baluns are provided with inserting tongues to penetrate through corresponding through holes on the dielectric plate so as to realize the support of the dielectric plate, and a feeder line laid on each inserting tongue is electrically connected with a corresponding feed part of one radiation arm.

17. The radiating element of any one of claims 1 to 14, wherein: the radiation unit is used for passing low-frequency signals.

18. An antenna comprising a reflection plate, a low-frequency radiation element row and a high-frequency radiation element row, each radiation element row comprising a plurality of radiation elements fed in parallel with each other, characterized in that: the radiation element in the low-frequency radiation element column adopts the radiation element as claimed in any one of claims 1 to 17.

19. The antenna of claim 18 wherein the low frequency radiating element array and the high frequency radiating element array are arranged collinearly along a common axis.

20. A base station, characterized by: the base station is provided with an antenna as claimed in claim 18 or 19 for transmitting signals communicated by the base station.