Small-size ultra-wideband 5G antenna

Abstract

The small-size ultra-wideband 5G antenna comprises an SMA connector, a rubber sleeve, a built-in sleeve, a coaxial cable and a spiral spring, the rubber sleeve is connected with the SMA connector in a sleeved mode, the built-in sleeve is arranged in the rubber sleeve, the spiral spring is arranged on the outer side of the end, away from the SMA connector, of the built-in sleeve in a sleeved mode, the coaxial cable is in butt joint with the SMA connector, and the coaxial cable is connected with the SMA connector in a sleeved mode. The built-in sleeve comprises an outer conductor and an inner conductor, and the inner conductor penetrates through the built-in sleeve and the spiral spring; wherein the part, extending out of the built-in sleeve, of the inner conductor is a high-frequency-band radiator, and the built-in sleeve and the spiral spring are low-frequency-band radiators. Compared with the prior art, the small-size ultra-wideband 5G antenna required to be protected in the application realizes ultra-wideband full coverage of high and low frequency bands by multiplexing a plurality of radiation branch knots in the same space in a monopole antenna mode, and has the advantages of small occupied space, excellent antenna efficiency and wide frequency band.

Description

Technical Field

[0001] The utility model relates to the technical field of antennas, and particularly relates to a small-size ultra-wideband 5G antenna. Background Art

[0002] With the advent of the 5G era, the communication system has been continuously upgraded. Due to the need for a substantial increase in capacity, the demand for the number of antennas is also increasing. Traditional antenna designs either have a narrow frequency band and cannot achieve wide full-band coverage, or in order to cover 2G / 3G / 4G / 5G signals simultaneously, the overall dimensions of the full-band 5G omnidirectional antenna are often large, which is not conducive to spatial layout. Its usual design method is: using the coaxial cable core wire as the radiator, and sleeving an outer conductor part outside the outer shield of the coaxial cable to form a dipole antenna. Although the antenna performance is good, the frequency band is narrow and cannot meet the current demand for large capacity and wide frequency band in mobile communication. Summary of the Utility Model

[0003] Based on the above technical problems, the present application proposes a small-size ultra-wideband 5G antenna, which has the advantages of small occupied space, excellent antenna efficiency, and wide frequency band.

[0004] To achieve the above object, the technical solution adopted by the utility model is: a small-size ultra-wideband 5G antenna, comprising: an SMA connector, a rubber sleeve, an inner sleeve, a coaxial cable, and a helical spring. The rubber sleeve is sleeved on the SMA connector, and the inner sleeve is arranged inside the rubber sleeve. A helical spring is sleeved outside one end of the inner sleeve away from the SMA connector. The coaxial cable is docked with the SMA connector and includes an outer conductor and an inner conductor. The inner conductor penetrates through the inner sleeve and the helical spring; wherein, the part of the inner conductor extending out of the inner sleeve is the high-frequency radiator, and the inner sleeve and the helical spring are the low-frequency radiators.

[0005] Further, the outer conductor is the ground of the antenna, and the part of the inner conductor inside the inner sleeve is connected to the SMA connector as the feeding part.

[0006] Further, the inner sleeve is electrically connected to the inner conductor by welding.

[0007] Furthermore, the inner sleeve includes an abutting part, a sleeving part, and a connecting part which are coaxially arranged. The helical spring is sleeved on the sleeving part. The inner conductor passes through the connecting part and is electrically connected to the port of the connecting part by soldering.

[0008] Further, the diameter of the abutting part is larger than that of the sleeving part, and the diameter of the sleeving part is larger than that of the connecting part.

[0009] Further, the helical spring includes a dense end and a sparse end. The dense end is partially sleeved on the sleeving portion, and the sparse end surrounds the outer periphery of the inner conductor.

[0010] Further, the coaxial cable further includes an insulator and a cable sheath. The insulator is sleeved on the outside of a part of the inner conductor, the outer conductor is sleeved on the outside of the insulator, and the cable sheath is sleeved on the outside of the outer conductor. Specifically, the outer conductor, the insulator, and the cable sheath are disposed inside the built-in sleeve.

[0011] Further, the built-in sleeve is a metal sleeve. Preferably, the built-in sleeve is a copper sleeve.

[0012] The beneficial effects of the present utility model are as follows: The low-frequency radiator is designed in the form of a spring, and the high-frequency radiator directly uses the inner conductor of the coaxial cable. The low-frequency radiator wraps the high-frequency radiator in the middle, which can effectively reduce the space and make the antenna size smaller, while achieving wide-band radiation. At the same time, the built-in sleeve is used to connect the helical spring of the low-frequency radiator and the inner conductor of the coaxial cable of the high-frequency radiator, which simplifies the process and can reduce the labor cost. The choke formed by the tail of the copper built-in sleeve and the antenna radiation ground can effectively adjust the matching of the antenna.

[0013] The small-size ultra-wideband 5G antenna claimed in the present application uses the monopole antenna mode to multiplex multiple radiation branch segments in the same space to achieve ultra-wideband full coverage of high and low frequency bands, and has the advantages of small occupied space, excellent antenna efficiency, and wide frequency band. Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure diagram of the small-size ultra-wideband 5G antenna in the embodiment of the present utility model;

[0015] Figure 2 It is a schematic overall structure diagram of the small-size ultra-wideband 5G antenna in the embodiment of the present utility model;

[0016] Figure 3 It is an exploded view of the small-size ultra-wideband 5G antenna in the embodiment of the present utility model;

[0017] Figure 4 It is an efficiency diagram of the low-frequency band of the small-size ultra-wideband 5G antenna in the embodiment of the present utility model;

[0018] Figure 5 It is an efficiency diagram of the high-frequency band of the small-size ultra-wideband 5G antenna in the embodiment of the present utility model;

[0019] Figure 6 It is an echo loss diagram of the small-size ultra-wideband 5G antenna in the embodiment of the present utility model;

[0020] Reference numerals: 10 - SMA connector, 20 - rubber sleeve, 30 - helical spring, 40 - built-in sleeve, 401 - abutting portion, 402 - sleeved portion, 403 - connecting portion, 50 - coaxial cable, 501 - inner conductor, 502 - insulator, 503 - outer conductor, 504 - cable sheath Detailed implementation manners

[0021] In order to make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific implementations disclosed below.

[0022] By providing a small-size ultra-wideband 5G antenna in an embodiment of the present application, the technical problem that the overall dimension of the full-band 5G omnidirectional antenna in the prior art is relatively large and not conducive to spatial layout is solved.

[0023] As Figures 1 to 3 shown, an embodiment of the present application: a small-size ultra-wideband 5G antenna includes: an SMA connector 10, a rubber sleeve 20, a built-in sleeve 40, a coaxial cable 50, and a helical spring 30. The rubber sleeve 20 is sleeved on the SMA connector 10. The built-in sleeve 40 is disposed inside the rubber sleeve 20. A helical spring 30 is sleeved on the outer side of one end of the built-in sleeve 40 away from the SMA connector. The coaxial cable 50 is docked with the SMA connector 10 and includes an inner conductor 501 and an outer conductor 503. The inner conductor 501 penetrates through the built-in sleeve 40 and the helical spring 30. Among them, the part of the inner conductor 501 extending out of the built-in sleeve 40 is a high-frequency radiator, and the built-in sleeve 40 and the helical spring 30 are low-frequency radiators.

[0024] In this embodiment, the outer conductor 503 is the ground of the antenna, which has a coupling effect with the built-in sleeve 40 to expand the bandwidth. The part of the inner conductor 501 inside the built-in sleeve 40 is connected to the SMA connector and serves as the feeding part. The built-in sleeve 40 coaxially covers the outside of the outer conductor 503, reducing the current of the antenna radiation grounding reference loop and forming a choke coil that can adjust impedance matching, so that the antenna performance reaches an excellent state.

[0025] By directly using the inner conductor 501 in the coaxial cable 50 for the high-frequency radiator and designing the low-frequency radiator in the form of a spring, since the relatively large-space-occupying helical spring 30 closely surrounds the inner conductor 501, this way of arranging the high-frequency and low-frequency radiators in the same space to achieve full-band coverage reduces the structural space and makes it easier to miniaturize the antenna size. More specifically, by wrapping the low-frequency radiator around the high-frequency radiator, it can achieve within the size of 10mm * 50mm, and at the same time, through the use of multiple stub designs, it successfully realizes wide-band radiation in the range of 700MHz - 960MHz / 1710MHz - 4200MHz.

[0026] The tail of the built-in sleeve 40 is electrically connected to the inner conductor 501 by welding. Preferably, soldering is used. This setting is to enhance the firmness between the inner conductor 501 and the built-in sleeve 40 and achieve full contact.

[0027] As Figure 1 shown, the built-in sleeve 40 includes a coaxial abutting portion 401, a sleeving portion 402, and a connecting portion 403. The diameter of the abutting portion 401 is greater than that of the sleeving portion 402, and the diameter of the sleeving portion 402 is greater than that of the connecting portion 403. The helical spring 30 is sleeved on the sleeving portion 402, and the inner conductor 501 passes through the connecting portion 403 and is electrically connected to the port of the connecting portion 403 by soldering. Thus, the outer shape of the built-in sleeve 40 is designed as a stepped structure with a gradually decreasing diameter. On the one hand, it is convenient for the helical spring 30 to be sleeved on the sleeving portion 402, and on the other hand, it is convenient for the connecting portion 403 to be welded to the inner conductor 501 in the coaxial cable 50, thereby forming a complete antenna radiation structure with full coverage of high and low frequencies. While reducing the manufacturing cost, the antenna performance is more stable and reliable.

[0028] From Figure 1 、 Figure 3 It can also be seen that the coil density of the helical spring 30 surrounding the outside of the coaxial cable 50 gradually decreases. Specifically, the helical spring 30 is set as a densely wound dense end and a sparsely wound sparse end. A part of the dense end is sleeved on the sleeving portion 402, and the sparse end surrounds the outer circumference of the inner conductor 501. The function of this setting is: the dense part forms a cylinder to facilitate the tight winding of the helical spring 30 outside the built-in sleeve 40, and the part exceeding the built-in sleeve 40 uses a sparse winding method to play a coupling role, with better matching and wider bandwidth.

[0029] The coaxial cable 50 specifically includes an inner conductor 501, an insulator 502, an outer conductor 503, and a cable sheath 504. The insulator 502 is sleeved on the outside of part of the inner conductor 501, the outer conductor 503 is sleeved on the outside of the insulator 502, the cable sheath 504 is sleeved on the outside of the outer conductor 503, and the outer conductor 503, the insulator 502, and the cable sheath 504 are all arranged inside the built-in sleeve 40.

[0030] In terms of material, the built-in sleeve 40 is a metal sleeve, and more preferably, the built-in sleeve 40 is a copper sleeve; the choke formed by the tail of the copper built-in sleeve 40 and the antenna radiation ground can effectively adjust the matching of the antenna.

[0031] Figure 4 and Figure 5 is the efficiency diagram of the antenna in the embodiment of the present invention. It can be seen from the figure that the efficiency of the antenna of the present invention is greater than 20% in the low frequency band of 700 MHz - 960 MHz and greater than 50% in the high frequency band of 1710 MHz - 4200 MHz; Figure 6 is the return loss diagram of the antenna in the embodiment of the present invention. It can be seen from the figure that the antenna structure of the present invention can meet the antenna design requirements in both the 700 MHz - 960 MHz and 1710 MHz - 4200 MHz bands.

[0032] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0033] The above-described embodiments only represent the implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A small-size ultra-wideband 5G antenna, characterized in that: include: An SMA connector, a rubber sleeve, an internal sleeve, a coaxial cable, and a coil spring, wherein the rubber sleeve is sleeved with the SMA connector, the internal sleeve is arranged inside the rubber sleeve, a coil spring is sleeved on the outer side of one end of the internal sleeve away from the SMA connector, the coaxial cable is docked with the SMA connector, and comprises an outer conductor and an inner conductor, wherein the inner conductor runs through the internal sleeve and the coil spring; wherein the portion of the inner conductor extending out of the internal sleeve is a high-frequency radiator, and the internal sleeve and the coil spring are low-frequency radiators.

2. The small-size ultra-wideband 5G antenna according to claim 1, characterized in that: The outer conductor is the ground of the antenna, and the portion of the inner conductor in the built-in sleeve is connected to the SMA connector as a feeding portion.

3. The small-size ultra-wideband 5G antenna according to claim 1, characterized in that: The built-in sleeve is electrically connected to the inner conductor by welding.

4. The small-size ultra-wideband 5G antenna according to claim 1, characterized in that: The built-in sleeve comprises a cylindrical abutting portion, a sleeve portion and a connecting portion. The coil spring is sleeved on the sleeve portion. The inner conductor passes through the connecting portion and is electrically connected to a port of the connecting portion by soldering.

5. The small-size ultra-wideband 5G antenna according to claim 4, characterized in that: The diameter of the abutting portion is greater than the diameter of the sleeve portion, and the diameter of the sleeve portion is greater than the diameter of the connecting portion.

6. The small-size ultra-wideband 5G antenna according to claim 4, characterized in that: The coil spring comprises a dense end and a sparse end, wherein the dense end is partially sleeved on the sleeve portion, and the sparse end surrounds the outer circumference of the inner conductor.

7. The small-size ultra-wideband 5G antenna according to claim 1, characterized in that: The coaxial cable further comprises an insulator and a cable sheath. The insulator is sleeved on the outside of a portion of the inner conductor, the outer conductor is sleeved on the outside of the insulator, and the cable sheath is sleeved on the outside of the outer conductor.

8. The small-size ultra-wideband 5G antenna according to claim 7, characterized in that: The outer conductor, the insulator and the cable sheath are arranged inside the built-in sleeve.

9. The small-size ultra-wideband 5G antenna according to claim 1, characterized in that: The built-in sleeve is a metal sleeve.

10. The small-size ultra-wideband 5G antenna according to claim 9, characterized in that: The built-in sleeve is a copper sleeve.

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