CN115513643A

CN115513643A - Antenna with a shield

Info

Publication number: CN115513643A
Application number: CN202110693959.8A
Authority: CN
Inventors: 刘巧灵; 邵明乾
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-12-23

Abstract

The utility model relates to an antenna, including antenna body, antenna body includes first irradiator (101) and second irradiator (102) that interval symmetry set up and the cover is established first irradiator with second irradiator outside one end seals the open impedance adjuster (200) of the other end, wherein, first irradiator with one of the second irradiator with impedance adjuster's terminal surface fixed connection, and first irradiator with the part of second irradiator is located in impedance adjuster's hollow inner chamber. Therefore, the impedance adjuster is sleeved on the outer side of the radiating body, the end face of the impedance adjuster is communicated with one of the first radiating body and the second radiating body, the impedance of the antenna is conveniently adjusted, and the antenna has better return loss and bandwidth. The antenna can receive or generate electromagnetic waves, has the characteristics of high gain, low profile, small out-of-roundness and omnidirectional radiation, and is simple in structure and convenient to produce and process.

Description

Antenna with a shield

Technical Field

The present disclosure relates to the field of communications devices, and in particular, to an antenna.

Background

When the cloud rail and the cloud bus adopt an LTE-M (LTE-Machine to Machine) frequency band for communication, a high-gain omnidirectional antenna needs to be applied, and because the LTE-M antenna is low in frequency, long in wavelength and high in gain requirement, how to realize omnidirectional radiation of a small-size antenna has the characteristics of low section, high gain and small out-of-roundness, and the method has extremely important significance.

Disclosure of Invention

It is an object of the present disclosure to provide an antenna having high gain, low profile, and low out-of-roundness omnidirectional radiation.

In order to achieve the above object, the present disclosure provides an antenna, an antenna main body, the antenna main body includes a first radiator and a second radiator that are symmetrically arranged at an interval, and a sleeve is arranged on the first radiator and the second radiator, wherein one end of the outer side of the first radiator and the second radiator is closed, and the other end of the first radiator and the second radiator is open, wherein one of the first radiator and the second radiator is fixedly connected with an end surface of the impedance adjuster, and the first radiator and the second radiator are partially located in a hollow inner cavity of the impedance adjuster.

Optionally, the first radiator and the second radiator have the same size of a portion of the hollow inner cavity.

Optionally, in two end surfaces of the first radiator and the second radiator that are close to each other, a feed point is provided on an end surface of the radiator that is fixedly connected to the impedance adjuster, and a ground point is provided on an end surface of the other radiator.

Optionally, the antenna covers at least 1.785GHz-1.805GHz working frequency band.

Optionally, the antenna further includes a housing, and a first reflector and a second reflector sleeved and fixed on an outer wall of the housing, wherein the antenna body is installed in the housing, the first reflector and the second reflector are arranged at an interval in a sleeving direction, the first reflector is used for surrounding the first radiator, and the second reflector is used for surrounding the second radiator.

Optionally, the housing, the first radiator, the second radiator, the first reflector, and the second reflector are all coaxially arranged.

Optionally, the first reflector and the second reflector are spaced apart by a distance of 1mm to 4mm.

Optionally, portions of the first radiator and the second radiator respectively extend out of the first reflector and the second reflector.

Optionally, the first radiator and the second radiator are arranged at an upper and lower interval, the first radiator is connected to the upper end surface of the impedance adjuster, the antenna further includes a housing, the second radiator is fixed in the housing through a first support structure, and the first radiator or the impedance adjuster is fixed above the second radiator through a second support structure at an interval.

Optionally, the first support structure includes a first positioning pillar fixed to the bottom wall of the housing, and a fixing groove for accommodating a lower end of the second radiator is formed in a top surface of the first positioning pillar.

Optionally, the second supporting structure includes a supporting member fixed to the upper end surface of the second radiator and used for supporting the first radiator, and a second positioning column fixed to the top cover of the housing and used for abutting against the upper end surface of the first radiator.

Optionally, the second bearing structure is still established including the cover and is fixed first backup pad on the outer wall of impedance regulator and many are fixed be used for supporting on the diapire of casing the first support column of first backup pad, many first support column is followed equidistant the arrangement of second irradiator circumference.

Optionally, the second supporting structure further includes a second supporting plate fixed to the outer wall of the first radiator and a plurality of second supporting columns fixed to the first supporting plate and used for supporting the second supporting plate, and the plurality of second supporting columns are arranged in the circumferential direction of the first radiator at equal intervals.

Through the technical scheme, the impedance adjuster is sleeved on the outer side of the radiating body, and the end face of the impedance adjuster is communicated with one of the first radiating body and the second radiating body, so that the impedance of the antenna can be conveniently adjusted, and the antenna has better return loss and bandwidth. The antenna can receive or generate electromagnetic waves, has the characteristics of high gain, low profile, small out-of-roundness and omnidirectional radiation, and is simple in structure and convenient to produce and process.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is an isometric view of an antenna provided by an exemplary embodiment of the present disclosure;

fig. 2 is a front view of an antenna provided by an exemplary embodiment of the present disclosure;

fig. 3 is an isometric view of an antenna provided by another exemplary embodiment of the present disclosure;

fig. 4 is a front view of an antenna provided by another exemplary embodiment of the present disclosure;

fig. 5 is a schematic view of a mounting structure of an antenna provided in another exemplary embodiment of the present disclosure;

fig. 6 is a graph of return loss of an antenna provided by an exemplary embodiment of the present disclosure;

fig. 7 is a 2D radiation pattern at 1.8GHz for an antenna provided by an exemplary embodiment of the present disclosure.

Description of the reference numerals

101. First radiator 1011 feed point

102. Grounding point of second radiator 1021

200. Impedance adjuster 301 first reflector

302. Second reflector 400 housing

500. Support 601 first positioning column

602. Second positioning column 701 first positioning column

702. Second support column 801 first support plate

802. Second support plate

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, terms of orientation such as "upper", "lower", "top" and "bottom" are used with respect to the actual installation state of the relevant components, and reference may be made specifically to the direction of the drawing shown in fig. 1. "inner and outer" refer to the inner and outer of the respective component profiles. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for order or importance. The following description refers to the accompanying drawings in which the same numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 7, the present disclosure provides an antenna including an antenna body including a first radiator 101 and a second radiator 102 symmetrically disposed at an interval, and an impedance adjuster 200 covering the outer sides of the first radiator 101 and the second radiator 102 and having one end closed and the other end open, where the first radiator 101 and the second radiator 102 constitute a dipole of the antenna, in an embodiment of the present disclosure, the first radiator 101 and the second radiator 102 each have an electrical length of 1/4 wavelength and are both configured as a cylinder, and the impedance adjuster 200 is configured as a hollow cylinder, where one of the first radiator 101 and the second radiator 102 is fixedly connected to an end surface of the impedance adjuster 200, and may also be designed as an integrated structure, and a gap is formed between the other one of the first radiator 101 and the second radiator 102 and the impedance adjuster 200, and a portion of the first radiator 101 and the second radiator 102 is located in a hollow inner cavity of the impedance adjuster 200.

Through the technical scheme, the impedance adjuster 200 is sleeved on the outer side of the radiating body, and the end face of the impedance adjuster 200 is communicated with one of the first radiating body 101 and the second radiating body 102, so that the impedance of the antenna can be conveniently adjusted, the antenna has better return loss and bandwidth, as shown in fig. 7, the maximum gain of the antenna at 1.8GHz is 3.57dBi, and the out-of-roundness of omnidirectional radiation is less than 0.1dB. The antenna has a simple structure and is convenient to produce and process.

Referring to fig. 1, in an embodiment of the present disclosure, the first radiator 101 and the second radiator 102 may have the same size of a portion located in the hollow cavity, so that the impedance adjuster 200 adjusts the impedance of the first radiator 101 and the second radiator 102, respectively, to reduce return loss.

Specifically, referring to fig. 1, of two end surfaces of the first radiator 101 and the second radiator 102 that are close to each other, a feeding point 1011 (i.e., a connection point between the antenna and the feeding line) is disposed on an end surface of the radiator that is fixedly connected to the impedance adjuster 200, the feeding line can effectively transmit signal energy, and transmit signal power from the transmitter to an input end of the antenna with a minimum loss, and further, a grounding point 1021 is disposed on an end surface of the other radiator.

According to some embodiments, the antenna covers at least the 1.785GHz-1.805GHz operating band, as shown in FIG. 6, and the return loss of the antenna is less than-10 dB at the 1.785GHz-1.805GHz band.

As an exemplary embodiment of the present disclosure, referring to fig. 3 to 5, the antenna may further include a case 400, and a first reflector 301 and a second reflector 302 that are fixedly sleeved on an outer wall of the case 400, wherein the antenna body is mounted in the case 400 such that the service life of the antenna is extended, the first reflector 301 and the second reflector 302 are arranged at an interval in a sleeving direction, and the first reflector 301 is configured to surround the first radiator 101, and the second reflector 302 is configured to surround the second radiator 102. The first reflector 301 and the second reflector 302 are both configured as hollow cylinders, which can increase the gain of the dipole, so that the antenna has a main lobe of omnidirectional radiation while having high gain, can receive or generate electromagnetic waves, and has the characteristics of high gain, low profile, and small out-of-roundness of omnidirectional radiation. Specifically, end surfaces of the first radiator 101 and the second reflector 302, which are close to each other, are located in hollow inner cavities of the first reflector 301 and the second reflector 302, respectively. In addition, the first radiator 101, the second radiator 102, the impedance adjuster 200, the first reflector 301, and the second reflector 302 are made of a metal material, such as stainless steel, copper, silver, or aluminum.

Further, referring to fig. 5, the housing 400, the first radiator 101, the second radiator 102, the first reflector 301, and the second reflector 302 may be coaxially arranged to enable uniform reflection of signals emitted from the first radiator 101 and the second radiator 102.

As an exemplary embodiment of the present disclosure, the first reflector 301 and the second reflector 302 may be spaced apart by a distance of 1mm to 4mm, so that the antenna has the characteristics of omnidirectional radiation and small out-of-roundness.

Referring to fig. 4, in the embodiment of the present disclosure, portions of the first radiator 101 and the second radiator 102 respectively extend out of the first reflector 301 and the second reflector 302, specifically, end surfaces of the first radiator 101 and the second radiator 102, which are far away from each other, respectively extend out of the first reflector 301 and the second reflector 302, and a dimension of the extending out of the reflectors is much smaller than a dimension of the extending out of the reflectors.

According to some embodiments, the first radiator 101 and the second radiator 102 may be spaced apart from each other up and down, the first radiator 101 is connected to the upper end surface of the impedance adjuster 200, the antenna may further include a housing 400, the housing 400 may be integrally formed with the reflector, the second radiator 102 is fixed in the housing 400 by a first support structure, and the first radiator 101 or the impedance adjuster 200 is fixed above the second radiator 102 by a second support structure, so that the radiators may be fixed in the housing 400 by the first support structure and the second support structure.

The first support structure may be constructed in any suitable configuration. In an embodiment of the present disclosure, referring to fig. 5, the first support structure may include a first positioning pillar 601 fixed on the bottom wall of the housing 400, and a fixing groove for receiving the lower end of the second radiator 102 is opened on a top surface of the first positioning pillar 601, and in an embodiment of the present disclosure, the fixing groove is a circular groove, and the second radiator 102 is placed in the fixing groove to fix the second radiator 102. In other embodiments, the first radiator 101 and the second radiator 102 may also be configured as rectangular parallelepiped structures, in which case the fixing grooves are designed as square grooves for placing the second radiator 102.

The second support structure may be constructed in any suitable configuration. In an embodiment of the present disclosure, referring to fig. 5, the second supporting structure may include a support 500 fixed on the upper end surface of the second radiator 102 for supporting the first radiator 101, the support 500 may be configured as a hollow non-metallic element, and a second positioning pillar 602 fixed on the top cover of the housing 400 for pressing against the upper end surface of the first radiator 101 so as to fasten the first radiator 101 and the second radiator 102, wherein the positioning pillar may be configured as a hollow cylindrical structure.

Further, referring to fig. 5, the second support structure may further include a first support plate 801 fixed on the outer wall of the impedance adjuster 200 in a sleeved manner, and a plurality of first support columns 701 fixed on the bottom wall of the casing 400 for supporting the first support plate 801, wherein the plurality of first support columns 701 are arranged at equal intervals along the circumference of the second radiator 102 to fix the impedance adjuster 200. Specifically, the first support columns 701 may be arranged in four, and the four first support columns 701 may be respectively connected with the first support plates 801 by fasteners to ensure the stability of the impedance adjuster 200, and the first support plates 801 may be fixed in the middle of the impedance adjuster 200.

Still further, referring to fig. 5, the second supporting structure may further include a second supporting plate 802 fixed to the outer wall of the first radiator 101 in a sleeved manner, and a plurality of second supporting columns 702 fixed to the first supporting plate 801 and used for supporting the second supporting plate 802, where the plurality of second supporting columns 702 are arranged at equal intervals along the circumferential direction of the first radiator 101 to fix the first radiator 101. Specifically, the second support columns 702 may be arranged in four, four second support columns 702 are uniformly distributed around the first radiator 101 in the circumferential direction, and the four second support columns 702 and the second support plate 802 are connected by a fastener to ensure the stability of the first radiator 101, in the embodiment of the present disclosure, the second support plate 802 is fixed on the middle upper portion of the first radiator 101, wherein the support columns may also be configured as a hollow cylinder structure to reduce the weight of the antenna. In addition, the housing 400, the supporting member 500, the supporting column, and the supporting plate may be made of non-metallic materials such as glass fiber and ABS. The supporting structure is simple in structure and easy to install.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the above embodiments, the various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations will not be further described in the present disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The utility model provides an antenna, includes the antenna main part, characterized in that, the antenna main part includes first irradiator (101) and second irradiator (102) that the interval symmetry set up and establishes first irradiator (101) with open impedance adjuster (200) of the other end is sealed to second irradiator (102) outside one end, wherein, first irradiator (101) with one of second irradiator (102) with the terminal surface fixed connection of impedance adjuster (200), and first irradiator (101) with the part of second irradiator (102) is located in the hollow inner chamber of impedance adjuster (200).

2. The antenna according to claim 1, characterized in that the first radiator (101) and the second radiator (102) have the same dimensions of the portion located in the hollow cavity.

3. The antenna according to claim 1, wherein a feeding point (1011) is provided on an end surface of a radiator fixedly connected to the impedance adjuster (200) and a grounding point (1021) is provided on an end surface of the other radiator, of two end surfaces of the first radiator (101) and the second radiator (102) which are close to each other.

4. The antenna of claim 1, wherein the antenna covers at least a 1.785GHz-1.805GHz operating band.

5. The antenna according to any one of claims 1-4, further comprising a housing (400), and a first reflector (301) and a second reflector (302) sleeved and fixed on an outer wall of the housing (400), wherein the antenna body is installed in the housing (400), the first reflector (301) and the second reflector (302) are arranged at intervals in the sleeving direction, and the first reflector (301) is used for surrounding the first radiator (101), and the second reflector (302) is used for surrounding the second radiator (102).

6. The antenna according to claim 5, characterized in that the housing (400), the first radiator (101), the second radiator (102), the first reflector (301), and the second reflector (302) are all coaxially arranged.

7. The antenna of claim 5, wherein the first reflector (301) is spaced from the second reflector (302) by a distance of 1mm to 4mm.

8. An antenna according to claim 5, characterized in that portions of the first radiator (101) and the second radiator (102) extend beyond the first reflector (301) and the second reflector (302), respectively.

9. The antenna according to claim 1 or 5, wherein the first radiator (101) and the second radiator (102) are arranged at an interval from top to bottom, the first radiator (101) is connected with an upper end surface of the impedance adjuster (200), the antenna further comprises a housing (400), the second radiator (102) is fixed in the housing (400) through a first supporting structure, and the first radiator (101) or the impedance adjuster (200) is fixed above the second radiator (102) at an interval through a second supporting structure.

10. The antenna of claim 9, wherein the first supporting structure comprises a first positioning pillar (601) fixed on the bottom wall of the housing (400), and a top surface of the first positioning pillar (601) is opened with a fixing groove for receiving a lower end of the second radiator (102).

11. The antenna of claim 10, wherein the second supporting structure comprises a support (500) fixed to an upper end surface of the second radiator (102) for supporting the first radiator (101), and a second positioning post (602) fixed to a top cover of the housing (400) for pressing against the upper end surface of the first radiator (101).

12. The antenna of claim 10, wherein the second supporting structure further comprises a first supporting plate (801) fixed on an outer wall of the impedance adjuster (200) and a plurality of first supporting pillars (701) fixed on a bottom wall of the housing (400) for supporting the first supporting plate (801), wherein the plurality of first supporting pillars (701) are arranged at equal intervals along a circumferential direction of the second radiator (102).

13. The antenna of claim 12, wherein the second supporting structure further comprises a second supporting plate (802) fixed on an outer wall of the first radiator (101) and a plurality of second supporting pillars (702) fixed on the first supporting plate (801) for supporting the second supporting plate (802), the plurality of second supporting pillars (702) being arranged at equal intervals along a circumferential direction of the first radiator (101).