CN209963264U

CN209963264U - Multiband antenna

Info

Publication number: CN209963264U
Application number: CN201920734080.1U
Authority: CN
Inventors: 陈辉
Original assignee: FOSHAN ANDERSON COMMUNICATIONS EQUIPMENT Co Ltd
Current assignee: Guangdong Anjiexin Communication Equipment Co ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-01-17
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a multiband antenna, including radiating element, feed balun circuit board, coaxial cable, metal coil and reflecting plate, radiating element install in on the reflecting plate and with the one end electricity of feed balun circuit board is connected, the other end of feed balun circuit board with the coaxial cable electricity is connected, metal coil encircles coaxial cable and with the coaxial cable coupling. Compared with the prior art, the utility model discloses use metal coil to encircle coaxial cable and with the coaxial cable coupling to adjust low frequency impedance matching, make the antenna realize lower frequency band on original frequency band basis, for example make original antenna realize 698 with good care 960 and 1710 with good care 2700MHZ two inherent frequency band's basis, realize 380 with good care 530MHZ frequency channel, satisfy more frequency bands.

Description

Multiband antenna

Technical Field

The utility model relates to a mobile communication equipment technical field especially relates to a multiband antenna.

Background

In the technical field of mobile communication equipment, an antenna is required to transmit and receive signals, the conventional antenna generally has only two frequency bands, most of which are 698-960MHz and 1710-2700MHz, and the frequency bands of the antenna are too few to meet the conventional requirements. However, if the frequency band is to be increased, the arrangement is often required from the structure of the radiation unit, and the structure is complex.

Therefore, a multiband antenna having a simple structure is required.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a multiband antenna, simple structure can realize the multiband.

In order to realize purposefully, the utility model discloses a multiband antenna, including radiating element, feed balun circuit board, coaxial cable, metal coil and reflecting plate, radiating element install in on the reflecting plate and with the one end electricity of feed balun circuit board is connected, the other end of feed balun circuit board with the coaxial cable electricity is connected, metal coil encircle coaxial cable and with coaxial cable coupling.

Compared with the prior art, the utility model discloses use metal coil to encircle coaxial cable and with the coaxial cable coupling to adjust low frequency impedance matching, make the antenna realize lower frequency band on original frequency band basis, for example make original antenna realize 698 with good care 960 and 1710 with good care 2700MHZ two inherent frequency band's basis, realize 380 with good care 530MHZ frequency channel, satisfy more frequency bands.

Preferably, the multiband antenna further includes a tuning strip, which is Z-shaped and mounted on the reflection plate and coupled to the radiation unit.

Preferably, the metal coil is wound around one end of the coaxial cable close to the feeding balun circuit board, and is spaced from the feeding balun circuit board by a preset distance, and the low-frequency impedance can be adjusted by the preset distance, and a specific value of the preset distance is set by a person skilled in the art according to needs.

Preferably, the multiband antenna further includes a parasitic piece, the radiating element is mounted above the reflecting plate at a certain interval, the radiating element includes a coupling dielectric plate, a low-frequency radiating portion and a high-frequency radiating portion, the low-frequency radiating portion and the high-frequency radiating portion are mounted on the coupling dielectric plate, the parasitic piece is coupled to the low-frequency radiating portion, the low-frequency radiating portion is electrically connected to the feeding balun circuit board, and the high-frequency radiating portion is coupled to the low-frequency radiating portion. The parasitic piece can enable the antenna to realize a higher frequency band on the basis of the original frequency band, for example, the antenna resonates in the 3400-4000MHZ frequency band, and the metal coil is combined to realize the working frequency band of the ultra-wide frequency band, so that the frequency band requirement of the future 5G communication equipment is met.

Specifically, the feeding balun circuit board includes a first feeding balun board and a second feeding balun board, the low-frequency radiating portion includes a first low-frequency radiating portion and a second low-frequency radiating portion, the parasitic piece includes a first parasitic piece coupled to the first low-frequency radiating portion, front ends of the first low-frequency radiating portion and the second low-frequency radiating portion are arranged opposite to each other, and front ends of the first low-frequency radiating portion and the second low-frequency radiating portion are electrically connected to the first feeding balun board and the second feeding balun board respectively, so that dual-band requirements, such as two natural bands of 698-shaped 960 and 1710-shaped 2700MHZ, are achieved through the low-frequency radiating portion and the high-frequency radiating portion.

More specifically, the low-frequency radiating part further includes a third low-frequency radiating part and a fourth low-frequency radiating part, the high-frequency radiating part includes a first high-frequency radiating part and a second high-frequency radiating part, the front ends of the first low-frequency radiating part and the second low-frequency radiating part are close to and opposite to each other, and extend gradually from the front ends to both sides while being relatively far away from each other, so as to form triangular regions arranged diagonally between the first low-frequency radiating part and the second low-frequency radiating part, the first high-frequency radiating part and the second high-frequency radiating part are respectively installed in the two triangular regions, the third low-frequency radiating part and the fourth low-frequency radiating part are respectively in a strip shape and are oppositely arranged, so that the third low-frequency radiating part surrounds and couples the first high-frequency radiating part, part of the first low-frequency radiating part and part of the second low-frequency radiating part from one side, and the fourth low-frequency radiating part surrounds and couples the second high-frequency radiating part from the other, The parasitic piece further comprises a second parasitic piece coupled to the third low-frequency radiating part and a third parasitic piece coupled to the fourth low-frequency radiating part, and the radiation performance is good.

Preferably, the first low-frequency radiating part comprises a first radiating arm, a second radiating arm and a third radiating arm, the front ends of which are connected together, the second low-frequency radiating part comprises a fourth radiating arm, a fifth radiating arm and a sixth radiating arm, the front ends of which are connected together, the first radiating arm, the second radiating arm, the third radiating arm, the fourth radiating arm, the fifth radiating arm and the sixth radiating arm are sequentially arranged at a certain included angle, a first zone, a second zone, a third zone, a fourth zone, a fifth zone and a sixth zone are sequentially formed between the two adjacent radiating arms, the low-frequency radiating part further comprises a third low-frequency radiating part and a fourth low-frequency radiating part, the first high-frequency radiating part is installed in the third zone and respectively coupled with the third radiating arm and the fourth radiating arm, the second high-frequency radiating part is installed in the sixth zone and respectively coupled with the sixth radiating arm and the first radiating arm, the third low-frequency radiation part comprises a first coupling arm, a second coupling arm and a third coupling arm, wherein the first coupling arm is arranged on the outer side of the first high-frequency radiation part, the third coupling arm is arranged on the outer side of the third radiation arm, the fourth radiation arm is arranged on the outer side of the first coupling arm, the outer side of the third radiation arm is arranged on the outer side of the first coupling arm, the outer side of the second coupling arm is arranged on the outer side of the second coupling arm, the third coupling arm is arranged on the outer side of the first coupling arm, the outer side of the second coupling arm is. The radiation performance is further improved by the mutual coupling of the four low-frequency radiation parts and the two high-frequency radiation parts.

Specifically, the first parasitic piece is in an inverted L shape, a vertical portion of the first parasitic piece is vertically connected to the first low-frequency radiating portion, and the second parasitic piece and the third parasitic piece are respectively connected to edges of the third low-frequency radiating portion and the fourth low-frequency radiating portion and vertically installed below the coupling medium plate.

Preferably, the first feeding balun plate and the second feeding balun plate are oppositely arranged at a certain interval.

Preferably, the multiband antenna further includes a ground strip and a copper core, the ground strip is mounted on the reflection plate, one end of the copper core is connected to the radiation unit, and the other end of the copper core is connected to the ground strip.

Drawings

Fig. 1 is a perspective view of the multi-band antenna according to the present invention at an angle.

Fig. 2 is a perspective view of another angle of the multi-band antenna of the present invention.

Fig. 3 is a perspective view of the multiband antenna of the present invention from an angle after the radome is removed.

Fig. 4 is a perspective view of another angle of the multiband antenna according to the present invention after the radome is removed.

Fig. 5 is a partial structural schematic diagram of an angle of the radiation unit of the present invention.

Fig. 6 is a partial schematic structural view of another angle of the radiation unit of the present invention.

Detailed Description

In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

Referring to fig. 3 to 4, the present invention discloses a multiband antenna 100, including a radiating element 20, a feeding balun circuit board 30, a coaxial cable 40, a metal coil 50 and a reflection plate 10, wherein the radiating element 20 is installed on the reflection plate 10 and electrically connected to one end of the feeding balun circuit board 30, the other end of the feeding balun circuit board 30 is electrically connected to the coaxial cable 40, and the metal coil 50 surrounds the coaxial cable 40 and is coupled to the coaxial cable 40. In this embodiment, the metal coil 50 is a copper coil, but other metal coils may be selected according to the requirement. The coaxial cable 40 is mounted on the reflection plate 10 through a wire clamping sleeve 42, and the end thereof is connected with a radio frequency connector 41.

Referring to fig. 4, the metal coil 50 is wound around one end of the coaxial cable 40 adjacent to the feeding balun circuit board 40, and is spaced from the feeding balun circuit board 40 by a predetermined distance. In this embodiment, the predetermined distance is 10mm to 20mm, which can be adjusted according to the requirement.

Referring to fig. 1 and 2, the multiband antenna 100 further includes a radome 101 and a bottom card slot 102, the radome 101 is mounted on the reflection plate 10 and encloses the radiation unit 20, the bottom card slot 102 is mounted on the back of the reflection plate 10, the multiband antenna 100 is a directional wall-mounted antenna in the indoor distribution field, when in use, a hook 103 engaged with the bottom card slot 102 is fixed on a wall, and then the multiband antenna 100 is mounted on the hook 103 through the bottom card slot 102 and is mounted on the wall.

Referring to fig. 3 to 6, the multiband antenna 100 further includes a parasitic patch 24, the radiating element 20 is mounted above the reflection plate 10 at a certain distance, the radiating element 20 includes a coupling dielectric plate 23, a low-frequency radiating portion 21 and a high-frequency radiating portion 22 mounted on the coupling dielectric plate 23, the parasitic patch 24 is coupled to the low-frequency radiating portion 21, the low-frequency radiating portion 21 is electrically connected to the feeding balun circuit board 30, and the high-frequency radiating portion 22 is coupled to the low-frequency radiating portion 21. In this embodiment, the thickness of the coupling dielectric plate 23 is 1.8 MM to 2.2MM, the coupling dielectric plate is formed by ABS injection molding, the dielectric constant is 2.0 MM to 2.4, and the small cylinders protruding from the dielectric plate are used to fix the low-frequency radiation portion 21 and the high-frequency radiation portion 22, and are fixed on the reflection plate 10 through the support pillars 25.

Referring to fig. 3 and 4, the multiband antenna 100 further includes a tuning strip 13, wherein the tuning strip 13 is Z-shaped, is mounted on the reflective plate 10, and is coupled to the radiating element 20. The present embodiment has two test strips 13, which are located below the radiation unit 20 at a certain distance and are respectively coupled to the radiation unit 20.

Referring to fig. 3 and 4, the feeding balun circuit board 30 includes a first feeding balun plate 31 and a second feeding balun plate 32, the low-frequency radiating portion 21 includes a first low-frequency radiating portion 211 and a second low-frequency radiating portion 212, front ends of the first low-frequency radiating portion 211 and the second low-frequency radiating portion 212 are disposed opposite to each other, the front end of the first low-frequency radiating portion 211 is electrically connected to the first feeding balun plate 31, the other end of the first feeding balun plate 31 is electrically connected to the outer conductor 301 of the coaxial cable 40, the front end of the second low-frequency radiating portion 12 is electrically connected to the second feeding balun plate 32, and the other end of the second feeding balun plate 32 is electrically connected to the inner conductor 302 of the coaxial cable 40. Wherein the first feeding balun plate 31 and the second feeding balun plate 32 are oppositely arranged with a certain distance. In this embodiment, the distance between the first feeding balun plate 31 and the second feeding balun plate 32 is 3 mm.

Referring to fig. 3, the parasitic patch 24 includes a first parasitic patch 241 coupled to the first low frequency radiating portion 211. The first parasitic piece 241 has an inverted L-shape, and a vertical portion thereof is vertically connected to the first low frequency radiating portion 211.

Referring to fig. 5 and 6, the low frequency radiation part 21 further includes a third low frequency radiation part 213 and a fourth low frequency radiation part 214, the high frequency radiation part 22 includes a first high frequency radiation part 221 and a second high frequency radiation part 222, front ends of the first low frequency radiation part 211 and the second low frequency radiation part 212 are adjacent to and opposite to each other, and extend gradually from the front ends to both sides while being relatively far away from each other, so as to form a triangular region disposed at two opposite corners between the first low frequency radiation part 211 and the second low frequency radiation part 212, the first high frequency radiation part 221 and the second high frequency radiation part 222 are respectively installed in the triangular regions, the third low frequency radiation part 213 and the fourth low frequency radiation part 214 are respectively in a strip shape and are disposed opposite to each other, so that the third low frequency radiation part 213 surrounds and couples the first high frequency radiation part 221, a part of the first low frequency radiation part 211, and a part of the second low frequency radiation part 212 from one side, the fourth low-frequency radiating portion 214 surrounds and couples the second high-frequency radiating portion 221, a part of the first low-frequency radiating portion 211 and a part of the second low-frequency radiating portion 212 from the other side, and the parasitic patch 24 further includes a second parasitic patch 242 coupled to the third low-frequency radiating portion 213 and a third parasitic patch 243 coupled to the fourth low-frequency radiating portion 214. The second parasitic pieces 242 and the third parasitic pieces 243 are respectively connected to the edges of the third low-frequency radiation part 213 and the fourth low-frequency radiation part 214 and are vertically installed below the coupling medium plate 23.

Referring to fig. 5 and 6, the first low-frequency radiating portion 211 includes a first radiating arm 201, a second radiating arm 202, and a third radiating arm 203, the second low-frequency radiating portion 212 includes a fourth radiating arm 204, a fifth radiating arm 205, and a sixth radiating arm 206, the front ends of which are connected together, and the first radiating arm 201, the second radiating arm 202, the third radiating arm 203, the fourth radiating arm 204, the fifth radiating arm 205, and the sixth radiating arm 206 are sequentially arranged at an included angle, and a first region between the first radiating arm 201 and the second radiating arm 202, a second region between the second radiating arm 202 and the third radiating arm 203, a third region between the third radiating arm 203 and the fourth radiating arm 204, a fourth region between the fourth radiating arm 204 and the fifth radiating arm 205, and a fifth region between the fifth radiating arm 205 and the sixth radiating arm 206 are sequentially formed between two adjacent radiating arms, A sixth region located between the sixth radiation arm 206 and the first radiation arm 201, wherein the first high-frequency radiation part 221 is installed in the third region and is coupled with the third radiation arm 203 and the fourth radiation arm 204, respectively, the second high-frequency radiation part 222 is installed in the sixth region and is coupled with the sixth radiation arm 206 and the first radiation arm 201, respectively, the third low-frequency radiation part 213 includes a first coupling arm 2131 that is installed outside the first high-frequency radiation part 221, the third radiation arm 203 and the fourth radiation arm 204 and is coupled with the first high-frequency radiation part 221, and a second coupling arm 21322 and a third coupling arm 2133 that are bent along both ends of the first coupling arm 2131 to extend to the second region and the fourth region, respectively, and the second coupling arm 2132 and the third coupling arm 2133 are coupled with the first low-frequency radiation arm 211 and the second low-frequency radiation arm 212, respectively. The fourth low frequency radiating portion 214 includes a fourth coupling arm 2141 disposed outside the first radiating arm 201, the second high frequency radiating arm 222, and the sixth radiating arm 206 and coupled to the second high frequency radiating arm 222, and a fifth coupling arm 2142 and a sixth coupling arm 2143 bent and extended to the first region and the fifth region along two ends of the fourth coupling arm 2141, respectively, where the fifth coupling arm 2142 and the sixth coupling arm 2143 are coupled to the first low frequency radiating arm 211 and the second low frequency radiating arm 212, respectively. Wherein the second coupling arm 2212 is connected to the second radiating arm 202 of the first low frequency radiating arm 211.

Referring to fig. 3, the multiband antenna 100 further includes a ground strip 11 and a copper core 12, the ground strip 11 is mounted on the reflection plate 10, and one end of the copper core 12 is connected to the radiation element 20, and the other end is connected to the ground strip 11. Specifically, the copper core wire 12 is terminated at the low frequency radiation portion 21 in the radiation unit 20. In this embodiment, the grounding point is located at a position where the third low-frequency radiating arm 213 is close to the first low-frequency radiating portion 211. Wherein, the copper core wire 12 is a 50 omega copper core wire with the length of 10.5 cm. The ground plate 11 is L-shaped and is fixed to the reflection plate 10 by a nut.

The above-mentioned scheme makes the original antenna with inherent frequency band 698-.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. A multi-band antenna, characterized by: the radiation unit is mounted on the reflecting plate and electrically connected with one end of the feed balun circuit board, the other end of the feed balun circuit board is electrically connected with the coaxial cable, and the metal coil surrounds the coaxial cable and is coupled with the coaxial cable.

2. The multiband antenna of claim 1, wherein: the test strip is Z-shaped, is arranged on the reflecting plate and is coupled with the radiation unit.

3. The multiband antenna of claim 1, wherein: the metal coil is wound at one end of the coaxial cable close to the feed balun circuit board, and is away from the feed balun circuit board by a preset distance.

4. The multiband antenna of claim 1, wherein: the radiation unit comprises a coupling medium plate, a low-frequency radiation part and a high-frequency radiation part, the low-frequency radiation part and the high-frequency radiation part are mounted on the coupling medium plate, the parasitic piece is coupled to the low-frequency radiation part, the low-frequency radiation part is electrically connected with the feed balun circuit board, and the high-frequency radiation part is coupled with the low-frequency radiation part.

5. The multiband antenna of claim 4, wherein: the feeding balun circuit board comprises a first feeding balun plate and a second feeding balun plate, the low-frequency radiation part comprises a first low-frequency radiation part and a second low-frequency radiation part, the parasitic piece comprises a first parasitic piece coupled to the first low-frequency radiation part, the front ends of the first low-frequency radiation part and the second low-frequency radiation part are arranged oppositely, and the front ends of the first low-frequency radiation part and the second low-frequency radiation part are respectively and electrically connected with the first feeding balun plate and the second feeding balun plate.

6. The multiband antenna of claim 5, wherein: the low-frequency radiation part also comprises a third low-frequency radiation part and a fourth low-frequency radiation part, the high-frequency radiation part comprises a first high-frequency radiation part and a second high-frequency radiation part, the front ends of the first low-frequency radiation part and the second low-frequency radiation part are close to and opposite to each other, extend from the front ends to two sides gradually and are far away from each other relatively, so that a triangular area with two opposite angles is formed between the first low-frequency radiation part and the second low-frequency radiation part, the first high-frequency radiation part and the second high-frequency radiation part are respectively arranged in the two triangular areas, the third low-frequency radiation part and the fourth low-frequency radiation part are respectively in a strip shape and are oppositely arranged, so that the third low-frequency radiation part surrounds and is coupled with the first high-frequency radiation part, part of the first low-frequency radiation part and part of the second low-frequency radiation part from one side, and the fourth low-frequency radiation part surrounds and is coupled with the second radiation part, A portion of the first low frequency radiating portion and a portion of the second low frequency radiating portion, the parasitic patch further comprising a second parasitic patch coupled to the third low frequency radiating portion, and a third parasitic patch coupled to the fourth low frequency radiating portion.

7. The multiband antenna of claim 6, wherein: first low frequency radiation portion includes front end link together first radiation arm, second radiation arm and third radiation arm, second low frequency radiation portion includes front end link together fourth radiation arm, fifth radiation arm and sixth radiation arm, just first radiation arm, second radiation arm, third radiation arm, fourth radiation arm, fifth radiation arm and sixth radiation arm arrange in proper order with certain contained angle to form first district, second district, third district, fourth district, fifth district and sixth district in proper order between two adjacent radiation arms, first high frequency radiation portion install in the third district and respectively with third radiation arm and fourth radiation arm coupling, second high frequency radiation portion install in the sixth district and respectively with sixth radiation arm and first radiation arm coupling, third low frequency radiation portion is including locating first high frequency radiation portion, The first coupling arm is arranged on the outer sides of the third radiation arm and the fourth radiation arm and coupled with the first high-frequency radiation part, the second coupling arm and the third coupling arm are respectively bent and extended to the second area and the fourth area along two ends of the first coupling arm, the fourth low-frequency radiation part comprises the fourth coupling arm which is arranged on the outer sides of the first radiation arm, the second high-frequency radiation arm and the sixth radiation arm and coupled with the second high-frequency radiation arm, and the fifth coupling arm and the sixth coupling arm are respectively bent and extended to the first area and the fifth area along two ends of the fourth coupling arm.

8. The multiband antenna of claim 6, wherein: the first parasitic piece is in an inverted L shape, the vertical part of the first parasitic piece is vertically connected to the first low-frequency radiation part, and the second parasitic piece and the third parasitic piece are respectively connected to the edges of the third low-frequency radiation part and the fourth low-frequency radiation part and are vertically installed below the coupling medium plate.

9. The multiband antenna of claim 5, wherein: the first feeding balun plate and the second feeding balun plate are oppositely arranged at a certain interval.

10. The multiband antenna of claim 1, wherein: the radiation unit further comprises a grounding strip and a copper core wire, wherein the grounding strip is installed on the reflection plate, one end of the copper core wire is connected with the radiation unit, and the other end of the copper core wire is connected with the grounding strip.