CN202474193U - Broadband dual polarization radiation unit - Google Patents

Abstract

The utility model discloses a broadband dual-polarized radiation unit, which comprises a radiator and a balanced feeding device; the radiator includes four radiation pieces and four support rods; the four radiation pieces are located on the same plane and arranged An array of rows and two columns is symmetrically distributed in pairs to form two pairs of orthogonally polarized dipoles; the radiation sheet includes an outer ring frame and an inner ring frame located on the same plane, and the inner ring frame is nested in the The inside of the outer ring frame is described and connected with the outer ring frame; the four support rods are respectively connected to the four radiation pieces in one-to-one correspondence, and each radiation piece is correspondingly cut at the connection point. The balanced feeding device is arranged in the middle of the radiator, and is used for feeding two pairs of dipoles. The broadband dual-polarization radiation unit provided by the utility model has a wide frequency range, stable broadband characteristics, and a simple structure.

Description

Broadband Dual Polarization Radiator

technical field

The utility model relates to the technical field of mobile communication antennas, in particular to a broadband dual-polarization radiation unit.

Background technique

With the development of communication technology, mobile communication is ready to enter the fourth generation mobile communication network (4G era). Under the new-generation mobile communication system, various communication standards require mobile communication antennas to be shared by multiple systems to save site installation resources for base stations and reduce network construction costs. The market needs an antenna with a frequency of 1710MHz-2690MHz, a bandwidth of 44.5%, and requires stable broadband characteristics in various indicators, such as impedance matching bandwidth, half-power beam width, gain, front-to-back ratio, and cross-polarization ratio etc., so it is more difficult to design. The development of broadband antenna unit is the basis of base station antenna design.

The relative bandwidth provided by the existing dual-polarized antenna elements is generally lower than 44.5%, and the bandwidth of the antenna array thus formed is also limited, making it difficult to meet market demand. For example, the antenna element disclosed in Chinese patent CN200910036577.7 has a relative bandwidth of Only 33%.

However, the few antenna oscillators that can meet the bandwidth requirements, such as the dual-polarized broadband radiation unit disclosed in Chinese patent CN201110064485.7, have a relatively complicated structure, which is not conducive to production.

Contents of the invention

The utility model provides a broadband dual-polarization radiation unit with wide frequency band, stable broadband characteristics and simple structure.

The embodiment of the utility model provides a broadband dual-polarized radiation unit, including a radiator and a balanced feeder; the radiator includes four radiation pieces with the same structure and four support rods with the same structure;

The four radiation pieces are located on the same plane, arranged in an array of two rows and two columns, and are symmetrically distributed in pairs, forming two pairs of orthogonally polarized dipoles; the radiation pieces include an outer ring frame and an inner ring frame located on the same plane. a ring frame, the inner ring frame is nested inside the outer ring frame and connected to the outer ring frame;

The four support rods are respectively connected to the four radiation sheets in one-to-one correspondence, and the support rods are located below the radiation sheet and perpendicular to the plane of the radiation sheet; each radiation sheet has a cut corner near the center of the array, and The cut corners are connected to their corresponding support rods;

The balanced feeder includes a first feeder and a second feeder; the two feeders are arranged in the middle of the radiator for feeding two pairs of dipoles.

In a preferred embodiment, the cross-section of the support rod is an isosceles trapezoid, which matches the cut corner shape of the radiation sheet; the outer ring frame of the radiation sheet is a square ring frame or a circular ring frame; The inner ring frame of the radiation sheet is a square ring frame or a circular ring frame.

Further, the broadband dual-polarized radiation unit further includes a reflection plate; the radiator is fixed on the reflection plate.

In the broadband dual-polarized radiation unit provided by the embodiment of the present invention, the radiator includes four radiation pieces and four support rods, and the four radiation pieces are symmetrical and orthogonally distributed to form two pairs of orthogonally polarized half-wave Vibrator; each radiator is a closed ring frame, and a small closed ring frame is nested inside, and the outer ring frame and the inner ring frame are designed as one in physical structure. Each radiation sheet is connected with the support rod, and the radiation sheet is cut correspondingly at the connection point. The utility model overcomes the defects of the existing broadband dual-polarized antenna technology that the horizontal beam width of the antenna vibrator varies greatly with the frequency, the gain of the antenna vibrator is relatively low, the assembly is troublesome, and the consistency is poor, and it provides an integrated design The broadband dual-polarized radiation unit has simple structure, convenient installation, good consistency, and easy production; due to the introduction of a smaller-sized resonant ring inside the radiation sheet, the high-frequency characteristics are improved, and the large ring works together to broaden the bandwidth. , the relative bandwidth exceeds 45%, and the standing wave ratio is excellent; in addition, due to the simple structure of the broadband dual-polarization radiation unit, the characteristics are stable, and it also has the advantages of small horizontal beam width fluctuation and high gain.

Description of drawings

Fig. 1 is a schematic structural diagram of a broadband dual-polarization radiation unit provided by Embodiment 1 of the present invention;

Fig. 2 is a schematic structural diagram of the broadband dual-polarization radiation unit provided by Embodiment 2 of the present invention;

Fig. 3 is a top view of the broadband dual-polarization radiation unit provided by the third embodiment of the utility model;

Fig. 4 is a connection structure diagram of the radiation sheet and the support rod provided by the fourth embodiment of the utility model;

Fig. 5 is a schematic structural diagram of the feeder provided by Embodiment 5 of the present utility model;

Fig. 6 is a connection structure diagram of the feeder and the dipole provided by the sixth embodiment of the utility model.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

Referring to FIG. 1 , it is a schematic structural diagram of a broadband dual-polarization radiation unit provided by Embodiment 1 of the present invention.

The broadband dual-polarized radiation unit provided in this embodiment includes a radiator 1 and a balanced feeder 2; the radiator 1 includes four radiating sheets with the same structure and four support rods with the same structure. As shown in Figure 1, the four radiating sheets are respectively the first radiating sheet 11, the second radiating sheet 12, the third radiating sheet 13 and the fourth radiating sheet 14; the four supporting rods are respectively the first supporting rod 21, the second The support rod 22 , the third support rod 23 and the fourth support rod 24 .

Referring to FIG. 2 , it is a schematic structural diagram of the broadband dual-polarization radiation unit provided by Embodiment 2 of the present invention.

The broadband dual-polarization radiating unit provided in Embodiment 2 includes a radiator 1 , a balanced feeding device 2 and a reflector 3 . Wherein, the structures of the radiator 1 and the balanced feeding device 2 are the same as those of the first embodiment above, and the radiator 1 is fixed on the reflector 3 .

Referring to FIG. 3 , it is a top view of the broadband dual-polarization radiation unit provided by Embodiment 3 of the present invention.

The four radiation sheets are located on the same plane, arranged in an array of two rows and two columns, symmetrically distributed in pairs, and form two pairs of orthogonally polarized dipoles. As shown in FIG. 3 , the first radiating sheet 11 , the second radiating sheet 12 , the third radiating sheet 13 and the fourth radiating sheet 14 are arranged in an array of two rows and two columns, in a symmetrical distribution. Wherein, the first radiating sheet 11 and the third radiating sheet 13 form a first pair of dipoles, the second radiating sheet 12 and the fourth radiating sheet 14 form a second pair of dipoles, and the two pairs of dipoles are orthogonally distributed.

The structures of the four radiating sheets are the same, and this embodiment only takes the first radiating sheet 11 as an example for illustration. As shown in FIG. 3 , the first radiation sheet 11 includes an outer ring frame 101 and an inner ring frame 102 located on the same plane. The inner ring frame 102 is nested inside the outer ring frame 101 and connected to the outer ring frame 102 . During specific implementation, the outer ring frame 101 may adopt a square ring frame, a circular ring frame or a ring frame of other shapes; the inner ring frame 102 may adopt a square ring frame, a circular ring frame or a ring frame of other shapes. Preferably, the outer ring frame 101 and the inner ring frame 102 of this embodiment are both square ring frames. In the embodiment of the present invention, due to the introduction of a smaller resonant ring inside the radiator, the high-frequency characteristics are improved, and the large ring works together to widen the bandwidth. The relative bandwidth exceeds 45%, and the standing wave ratio index is excellent.

As shown in FIG. 1 , the four support rods are respectively connected to the four radiation sheets in one-to-one correspondence, and the support rods are located below the radiation sheet and perpendicular to the plane of the radiation sheet. That is, the first support rod 21 is connected to the first radiation sheet 11, the second support rod 22 is connected to the second radiation sheet 12, the third support rod 23 is connected to the third radiation sheet 13, and the fourth support rod 24 is connected to the fourth radiation sheet. 14 connections.

A corner of each radiation sheet close to the center of the array is provided with a cut corner, and is connected to a corresponding support rod at the cut corner. For example, as shown in FIG. 1 , a cut corner 110 is provided at a corner of the first radiation sheet 11 close to the center of the array; the cut corner 110 is a connection point between the first radiation sheet 11 and the first support rod 21 .

Preferably, each radiating piece and its corresponding supporting rod are integrally formed metal plates, and the cross-section of the supporting rod is an isosceles trapezoid, which matches the cut corner shape of the radiating piece. Referring to FIG. 4 , it is a connection structure diagram of the radiation sheet and the support rod of the broadband dual-polarization radiation unit.

As shown in FIG. 3 , the balanced feeder 2 specifically includes a first feeder 201 and a second feeder 202 ; the two feeders are arranged in the middle of the radiator for feeding two pairs of dipoles. During specific implementation, the balanced feeding device 2 is fixed in the middle of the radiator 1 through a plastic sheet.

Referring to FIG. 5 , it is a schematic structural diagram of the feeder provided by Embodiment 5 of the present utility model.

The structure of the first feeder 201 and the second feeder 202 is the same, and this embodiment only takes the first feeder 201 as an example for illustration. As shown in FIG. 5 , the first feeder 201 includes a feeder T1 , a feeder T3 and a feeder T5 . The feeder T5 is arranged horizontally, and the feeder T1 and the feeder T3 are arranged vertically; the upper end of the feeder T1 and the upper end of the feeder T3 are respectively connected to the two ends of the feeder T5; and the length of the feeder T1 is longer than that of the feeder T3.

Referring to FIG. 6 , it is a connection structure diagram of the feeder and the dipole provided by the sixth embodiment of the present invention. The first feeder 201 is disposed between the first support rod 21 and the third support rod 23 for feeding the first pair of dipoles. The feeder T1 of the first feeder 201 is arranged vertically, and its bottom is fixed on the reflector; the feeder T3 is arranged vertically; and the length of the feeder T1 is longer than that of the feeder T3. The feeder T5 is arranged horizontally, one end of the feeder T5 is connected to the upper end of the feeder T1, and the other end of the feeder T5 is connected to the upper end of the feeder T3; the feeder T3 and the feeder T5 form an L-shaped probe.

Similarly, the second feeder 202 is disposed between the second support rod 22 and the fourth support rod 24 for feeding the second pair of dipoles. The second feeder 202 includes a feeder T2, a feeder T4, and a feeder T6; the feeder T2 is vertically arranged, and its bottom is fixed on the reflector; the feeder T4 is vertically arranged; and the length of the feeder T2 is greater than the length of the feeder T4; T6 is set horizontally, one end of feeder T6 is connected to the upper end of feeder T2, and the other end of feeder T6 is connected to the upper end of feeder T4; feeder T4 and feeder T6 form an L-shaped probe.

The top of the first feeder 201 and the top of the second feeder 202 are fixed by plastic parts, and are arranged in the middle of the radiator 1 .

In the broadband dual-polarized radiation unit provided by the embodiment of the present invention, the radiator includes four radiation pieces and four support rods, and the four radiation pieces are symmetrical and orthogonally distributed to form two pairs of orthogonally polarized half-wave Vibrator; each radiator is a closed ring frame, and a small closed ring frame is nested inside, and the outer ring frame and the inner ring frame are designed as one in physical structure. Each radiation sheet is connected with the support rod, and the radiation sheet is cut correspondingly at the connection point. The utility model overcomes the defects that the horizontal beam width of the antenna vibrator varies greatly with the frequency, the gain of the antenna vibrator is relatively low, the assembly is troublesome, and the consistency is poor in the existing broadband dual-polarized antenna technology, and provides an integrated design The broadband dual-polarized radiation unit has simple structure, convenient installation, good consistency, and easy production; due to the introduction of a small-sized resonant ring inside the radiation sheet, the high-frequency characteristics are improved, and the large ring works together to widen the bandwidth. , the relative bandwidth exceeds 45%, and the standing wave ratio is excellent; in addition, due to the simple structure of the broadband dual-polarization radiation unit, the characteristics are stable, and it also has the advantages of small horizontal beam width fluctuation and high gain.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (10)

1. A broadband dual-polarized radiating unit is characterized in that it includes a radiator and a balanced feeder; the radiator includes four structurally identical radiating sheets and four structurally identical support rods; The four radiation pieces are located on the same plane, arranged in an array of two rows and two columns, and are symmetrically distributed in pairs, forming two pairs of orthogonally polarized dipoles; the radiation pieces include an outer ring frame and an inner ring frame located on the same plane. a ring frame, the inner ring frame is nested inside the outer ring frame and connected to the outer ring frame; The four support rods are respectively connected to the four radiation sheets in one-to-one correspondence, and the support rods are located below the radiation sheet and perpendicular to the plane of the radiation sheet; each radiation sheet has a cut corner near the center of the array, and The cut corners are connected to their corresponding support rods; The balanced feeder includes a first feeder and a second feeder; the two feeders are arranged in the middle of the radiator for feeding two pairs of dipoles. 2. The broadband dual-polarization radiation unit according to claim 1, characterized in that, the broadband dual-polarization radiation unit further comprises a reflector; the radiator is fixed on the reflector. 3 . The broadband dual-polarization radiation unit according to claim 2 , wherein the cross-section of the support rod is an isosceles trapezoid, which matches the cut corner shape of the radiation sheet. 4 . 4. The broadband dual-polarized radiation unit as claimed in claim 3, wherein the four radiation sheets are respectively the first radiation sheet, the second radiation sheet, the third radiation sheet and the fourth radiation sheet; four support rods Respectively the first support rod, the second support rod, the third support rod and the fourth support rod; The first support rod is connected to the first radiation sheet, the second support rod is connected to the second radiation sheet, the third support rod is connected to the third radiation sheet, and the fourth support rod is connected to the fourth radiation sheet; The first radiation sheet and the third radiation sheet form a first pair of dipoles, the second radiation sheet and the fourth radiation sheet form a second pair of dipoles, and the two pairs of dipoles are orthogonally distributed. 5. The broadband dual-polarized radiating unit as claimed in claim 4, wherein the first feeder is arranged between the first support rod and the third support rod, and is used to conduct the first pair of dipoles feed; The first feeder includes a feeder T1, a feeder T3 and a feeder T5; the feeder T1 is vertically arranged, and its bottom is fixed on the reflector; the feeder T3 is vertically arranged; and the length of the feeder T1 is greater than the length of the feeder T3; The feeder T5 is arranged horizontally, one end of the feeder T5 is connected to the upper end of the feeder T1, and the other end of the feeder T5 is connected to the upper end of the feeder T3; the feeder T3 and the feeder T5 form an L-shaped probe. 6. The broadband dual-polarization radiating unit as claimed in claim 5, wherein the second feed member is arranged between the second support rod and the fourth support rod, for performing a second pair of dipoles feed; The second feeder includes a feeder T2, a feeder T4, and a feeder T6; the feeder T2 is vertically arranged, and its bottom is fixed on the reflector; the feeder T4 is vertically arranged; and the length of the feeder T2 is greater than the length of the feeder T4; The feeder T6 is arranged horizontally, one end of the feeder T6 is connected to the upper end of the feeder T2, and the other end of the feeder T6 is connected to the upper end of the feeder T4; the feeder T4 and the feeder T6 form an L-shaped probe. 7. The broadband dual-polarization radiation unit according to claim 6, characterized in that, the top of the first feeding part and the top of the second feeding part are fixed by plastic parts. 8. The broadband dual-polarization radiation unit according to any one of claims 1 to 7, characterized in that each radiation piece and its corresponding support rod are integrally formed metal plates. 9. The broadband dual-polarization radiation unit according to claim 8, characterized in that, the outer ring frame of the radiation sheet is a square ring frame or a circular ring frame. 10 . The broadband dual-polarization radiation unit according to claim 9 , wherein the inner ring frame of the radiation sheet is a square ring frame or a circular ring frame. 11 .

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