CN214849037U

CN214849037U - Broadband antenna for 5G communication

Info

Publication number: CN214849037U
Application number: CN202120691481.0U
Authority: CN
Inventors: 戴海军; 李忠心; 严清夏
Original assignee: Shenzhen Haidemen Electronics Co ltd; Shanghai Deman Electronics Technology Co Ltd
Current assignee: Shenzhen Haidemen Electronics Co ltd; Shanghai Deman Electronics Technology Co Ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-23
Anticipated expiration: 2031-04-06

Abstract

The utility model discloses a broadband antenna for 5G communication, include: the coaxial cable comprises a dielectric substrate, a coaxial cable, a first radiator and a second radiator, wherein the first radiator and the second radiator are arranged on the upper half part and the lower half part of the dielectric substrate respectively in a mode that headers are opposite; the first radiator is connected with an inner core of the coaxial line, and the second radiator is connected with an outer conductor of the coaxial line; the first radiator and the second radiator both comprise long branches for receiving and transmitting low-frequency or medium-frequency signals and short branches for receiving and transmitting medium-frequency or high-frequency signals, and the first radiator and the second radiator both have bilaterally symmetrical wiring shapes; and the long branch of the second radiator is provided with a convex branch for adjusting impedance matching. The utility model has the advantages of excellent performance, the cost is lower, the better sum frequency bandwidth of out-of-roundness, can cover the whole frequency channel of 5G, can extensively be fit for being arranged in 5G communication system.

Description

Broadband antenna for 5G communication

Technical Field

The utility model relates to a communication equipment technical field, concretely relates to broadband antenna for 5G communication.

Background

In recent years, with the rapid development of the fifth generation mobile communication technology (5G), requirements for the frequency band, size, bandwidth and the like of an antenna are becoming more and more severe. The traditional 4G or 5G antenna generally adopts a sleeve or spring antenna and has the defects of difficult processing, high manufacturing cost and the like. The PCB printed antenna prints the antenna on the substrate, has the advantages of low manufacturing cost, convenient design and optimization, easy processing and the like, and can be widely applied to mobile communication systems. At present, a small-sized, broadband and low-cost 5G communication antenna is designed, which is a technical problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at is not enough to prior art, provides a broadband antenna for 5G communication, has advantages such as miniaturization, broadband and low cost, can cover the whole communication frequency channel of 5G communication, but wide application in various actual 5G communication scenes.

A wideband antenna for 5G communications, comprising: the coaxial cable comprises a dielectric substrate, a coaxial cable, a first radiator and a second radiator, wherein the first radiator and the second radiator are arranged on the upper half part and the lower half part of the dielectric substrate respectively in a mode that headers are opposite; the first radiator is connected with an inner core of the coaxial line, and the second radiator is connected with an outer conductor of the coaxial line; the first radiator and the second radiator both comprise long branches for receiving and transmitting low-frequency or medium-frequency signals and short branches for receiving and transmitting medium-frequency or high-frequency signals, and the first radiator and the second radiator both have bilaterally symmetrical wiring shapes; and the long branch of the second radiator is provided with a convex branch for adjusting impedance matching.

Furthermore, the first radiator and the second radiator are arranged on the same surface of the dielectric substrate.

Furthermore, a signal pad is arranged at the head of the first radiator, a first ground pad is arranged at the head of the second radiator, a second ground pad is arranged in the region, which avoids the second radiator, of the lower half portion of the dielectric substrate, and the signal pad, the first ground pad and the second ground pad are all located on a central axis of the dielectric substrate; the inner core of the coaxial line is connected to the signal pad, and the outer conductor of the coaxial line is connected to the first grounding pad and the second grounding pad.

Furthermore, the first radiator is disposed on the upper surface of the dielectric substrate, and the second radiator is disposed on the lower surface of the dielectric substrate.

Furthermore, a signal pad is arranged at the head of the first radiator, a first ground pad is arranged at a position, corresponding to the head of the second radiator, on the upper surface of the upper half portion of the dielectric substrate, a second ground pad is arranged on the upper surface of the lower half portion of the dielectric substrate, and the signal pad, the first ground pad and the second ground pad are all located on a central axis of the dielectric substrate; a conductive patch covering the first grounding pad is further arranged on the upper surface of the dielectric substrate, the coverage area of the conductive patch is larger than the area of the first grounding pad, and a metalized through hole is formed in the area, exceeding the first grounding pad, of the conductive patch and used for conducting the second radiator with the first grounding pad; the inner core of the coaxial line is connected to the signal pad, and the outer conductor of the coaxial line is connected to the first grounding pad and the second grounding pad.

Further, the conductive patch has a shape corresponding to the head of the second radiator, so that the conductive patch and the head of the second radiator completely coincide with each other in a vertical direction.

Furthermore, the first radiator and the second radiator both include a group of long branches and two groups of short branches, the long branches of the first radiator are distributed on the left and right sides of the short branches, and the long branches of the second radiator are distributed on the left and right sides of the short branches.

Furthermore, two groups of the protruding branches are arranged on the long branches of the second radiator, wherein one group is positioned at the root part of the outer side of the long branches, and the other group is positioned at the inner side of the long branches.

Further, the shape of the protruding branch is rectangular.

Furthermore, the end of the long branch of the first radiator is folded inwards at a right angle.

The beneficial effects of the utility model reside in that: the utility model has the advantages of excellent performance, the cost is lower, the better sum frequency bandwidth of out-of-roundness, can cover the whole frequency channel of 5G, can extensively be fit for being arranged in 5G communication system.

Drawings

Fig. 1 is a schematic diagram of a wideband antenna for 5G communications according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a wideband antenna for 5G communication according to another embodiment of the present invention;

fig. 3 is a measured return loss curve for the single panel broadband antenna shown in fig. 1.

Detailed Description

The invention will be further described with reference to the accompanying drawings and preferred embodiments.

The specific embodiment of the utility model provides a broadband antenna for 5G communication, figure 1 is this broadband antenna's single-sided board design sketch map, and figure 2 is this broadband antenna's double-sided board design sketch map, and for the convenience of description, in two kinds of embodiments of figure 1 and figure 2, the same reference numeral has been adopted to the same part. Referring to fig. 1 and 2, the broadband antenna includes: the coaxial cable comprises a dielectric substrate 1, a coaxial cable 11, a first radiator 2A and a second radiator 2B, wherein the first radiator 2A and the second radiator 2B are arranged on the upper half part and the lower half part of the dielectric substrate 1 in a head-to-head opposite mode respectively; the first radiator 2A is connected to the inner core of the coaxial line 11, and the second radiator 2B is connected to the outer conductor of the coaxial line 11. The first radiator 2A and the second radiator 2B each include a long stub for transmitting and receiving a low-frequency or intermediate-frequency signal and a short stub for transmitting and receiving an intermediate-frequency or high-frequency signal, and the first radiator 2A and the second radiator 2B each have a line shape that is bilaterally symmetric. The long branch 3' of the second radiator 2B has a protruding branch for adjusting impedance matching.

In the embodiment shown in fig. 1, the first radiator 2A and the second radiator 2B are disposed on the same surface of the dielectric substrate 1, and are designed as a single panel. The header of the first radiator 2A is provided with a signal pad 8, the header of the second radiator 2B is provided with a first ground pad 9, the lower half portion of the dielectric substrate 1 avoiding the area of the second radiator is provided with a second ground pad 10, and the signal pad 8, the first ground pad 9 and the second ground pad 10 are all located on the central axis of the dielectric substrate 1. The inner core of the coaxial line 11 is connected to the signal pad 8 and the outer conductor of the coaxial line 11 is connected to the first ground pad 9 and said second ground pad 10.

In the embodiment shown in fig. 2, the first radiator 2A and the second radiator 2B are respectively disposed on two opposite surfaces of the dielectric substrate 1, which may be referred to as an upper surface and a lower surface. Compared to the embodiment shown in fig. 1, the first radiator 2A has the same shape design, the second radiator 2B has the same shape design, and a signal pad, a first ground pad and a second ground pad are designed at corresponding positions on the upper surface, and the connection relationship between the coaxial line 11 and the signal pad and the first and second ground pads is unchanged, except that the second radiator 2B is disposed on the other surface (for example, the lower surface) opposite to the surface (for example, the upper surface) where the first radiator 2A is located, and the second radiator 2B is guided to the upper surface by designing the conductive patch 12 and the metalized via 13 to be connected to the first ground pad 9 designed on the upper surface. Specifically, a conductive patch 12 may be disposed on the upper surface of the dielectric substrate 1, the conductive patch 12 completely covers the first ground pad 9, and a coverage area of the conductive patch 12 is larger than an area of the first ground pad 9, and a plurality of metalized through holes 13 are disposed in an area of the conductive patch 12 beyond the first ground pad 9, so as to conduct the second radiator 2B with the first ground pad 9, so that the second radiator 2B is indirectly connected with and conducted with the outer conductor of the coaxial line. Preferably, the shape of the conductive patch 12 coincides with the shape of the head of the second radiator 2B, so that the conductive patch 12 completely coincides with the head of the second radiator 2B in the vertical direction.

In some preferred schemes, the outer contours of the headings of the first radiator 2A and the second radiator 2B are both arc-shaped, specifically, the outer contour of the headings of the first radiator 2A is arc-shaped and protrudes outward (i.e., protrudes toward the second radiator), and the outer contour of the headings of the second radiator 2B is arc-shaped and protrudes outward (i.e., protrudes toward the first radiator).

With continued reference to fig. 1 and 2, the first radiator 2A and the second radiator 2B each include a set of long branches and two sets of short branches, the long branches of the first radiator 2A are distributed on the left and right sides of the short branches, and the long branches of the second radiator 2B are also distributed on the left and right sides of the short branches. Specifically, the short branches of the first radiator 2A and the short branches of the second radiator 2B have the same trace shape, and are distributed on the dielectric substrate in an up-down axisymmetric manner. Taking the first radiator 2A as an example, the two groups of short branches include a short branch 5 located in the middle and two other short branches 4 located on the left and right sides of the short branch 5. Because the whole broadband antenna is in a form of bilateral symmetry about the central axis, therefore: for the first radiator 2A, the two long branches 3 located on the left and right sides are also symmetric left and right about the central axis, while the two short branches 4 are also symmetric left and right about the central axis, and the short branches 5 are exactly located on the central axis and are symmetric left and right in shape. The same symmetry as that of the first radiator 2A also exists for the shape of the trace of the second radiator 2B, except that two sets of protruding

branches

6 and 7 are provided on the two long branches 3' of the second radiator 2B, each set including two protruding branches that are bilaterally symmetric. Wherein, the first group of the convex branches 6 are arranged at the root of the long branch 3 ', and the second group of the convex branches 7 are arranged at the inner side of the long branch 3'. For the protruding branch 6, the function is mainly to cover the low frequency of the 5G frequency band, so as to achieve the purpose of increasing the bandwidth of the antenna. Preferably, the two sets of protruding

branches

6 and 7 are both rectangular in shape, and the specific size of the rectangle is determined according to the bandwidth requirement in actual use. It should be understood that the terms "long branch" and "short branch" are relative concepts, and mean that the length of an antenna arm for transceiving medium and low frequency signals should be longer than the length of an antenna arm for transceiving medium and high frequency signals, and λ, c, f respectively represent wavelength, light speed, and frequency according to the well-known formula λ ═ c/f, and λ, c, and f respectively represent wavelength, light speed, and frequency, and the wavelength is shorter as the frequency is higher, and is proportional to the length of the antenna, so that in the antenna, the antenna arm with longer length is correspondingly used for transceiving low or medium frequency signals, and the antenna arm with shorter length is applied to transceiving high or medium frequency signals. As for the specific length proportion between long branch and the short branch, should design according to the communication frequency channel when in actual use, the utility model discloses do not do the restriction to this.

In some embodiments, the end of the long branch 3 of the first radiator 2A is folded inward at a right angle, so that the long branch 3 forms a shape similar to an inverted L.

As shown in fig. 3, which is a measured return loss curve of the single-panel antenna shown in fig. 1, it can be seen that the broadband antenna has a large impedance bandwidth and can cover the entire operating frequency band of 5G communication.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the technical field of the utility model belongs to the prerequisite of not deviating from the utility model discloses, can also make a plurality of equal substitution or obvious variants, performance or usage are the same moreover, all should regard as belonging to the utility model's scope of protection.

Claims

1. A wideband antenna for 5G communications, comprising: the coaxial cable comprises a dielectric substrate (1), a coaxial cable (11), a first radiator (2A) and a second radiator (2B), wherein the first radiator (2A) and the second radiator (2B) are arranged on the upper half part and the lower half part of the dielectric substrate (1) respectively in a mode that headers are opposite; wherein the first radiator (2A) is connected with an inner core of the coaxial line (11), and the second radiator (2B) is connected with an outer conductor of the coaxial line (11);

the first radiator (2A) and the second radiator (2B) both comprise long branches for receiving and transmitting low-frequency or intermediate-frequency signals and short branches for receiving and transmitting intermediate-frequency or high-frequency signals, and the first radiator (2A) and the second radiator (2B) both have bilaterally symmetrical wiring shapes; wherein, the long branch (3') of the second radiator (2B) is provided with convex branches (6, 7) for adjusting impedance matching.

2. The wideband antenna for 5G communications according to claim 1, wherein: the first radiator (2A) and the second radiator (2B) are arranged on the same surface of the dielectric substrate (1).

3. The wideband antenna for 5G communications according to claim 2, wherein: a signal pad (8) is arranged at the head of the first radiator (2A), a first grounding pad (9) is arranged at the head of the second radiator (2B), a second grounding pad (10) is arranged in the region, avoiding the second radiator, of the lower half part of the dielectric substrate (1), and the signal pad (8), the first grounding pad (9) and the second grounding pad (10) are all located on the central axis of the dielectric substrate (1);

the inner core of the coaxial line (11) is connected to the signal pad (8), and the outer conductor of the coaxial line (11) is connected to the first ground pad (9) and the second ground pad (10).

4. The wideband antenna for 5G communications according to claim 1, wherein: the first radiator is arranged on the upper surface of the dielectric substrate, and the second radiator is arranged on the lower surface of the dielectric substrate.

5. The wideband antenna for 5G communications according to claim 4, wherein: the head of the first radiator is provided with a signal pad, the upper surface of the dielectric substrate is provided with a first grounding pad at a position corresponding to the head of the second radiator, the upper surface of the lower half part of the dielectric substrate is provided with a second grounding pad, and the signal pad, the first grounding pad and the second grounding pad are all positioned on a central axis of the dielectric substrate;

a conductive patch (12) covering the first grounding pad is further arranged on the upper surface of the dielectric substrate, the covering area of the conductive patch is larger than the area of the first grounding pad, and a metalized through hole (13) is formed in the area, exceeding the first grounding pad, of the conductive patch and used for conducting the second radiator with the first grounding pad;

the inner core of the coaxial line is connected to the signal pad, and the outer conductor of the coaxial line is connected to the first grounding pad and the second grounding pad.

6. The wideband antenna for 5G communications according to claim 5, wherein: the conductive patch has a shape identical to that of the header of the second radiator so that the conductive patch and the header of the second radiator are completely overlapped in a vertical direction.

7. The wideband antenna for 5G communications according to claim 1, wherein: the first radiator and the second radiator both include a set of long branches and two sets of short branches, and the long branches of the first radiator distribute in the left and right sides of short branches, and the long branches of the second radiator distribute in the left and right sides of short branches.

8. The wideband antenna for 5G communications according to claim 7, wherein: and the long branch of the second radiator is provided with two groups of the convex branches, wherein one group of the convex branches is positioned at the root part of the outer side of the long branch, and the other group of the convex branches is positioned at the inner side of the long branch.

9. The wideband antenna for 5G communications according to claim 1 or 8, wherein: the shape of the protruding branch knot is rectangular.

10. The wideband antenna for 5G communications according to claim 7, wherein: the tail end of the long branch of the first radiator is inwards folded at a right angle.