Ultra-wideband radiation unit and antenna

Abstract

The invention provides an ultra-wideband radiation unit and an antenna, and belongs to the technical field of antennas. The ultra wide band radiation unit comprises a connecting piece, a radiation body connected to the connecting piece, a coupling radiation piece, a feed sheet and a guiding structure, and the coupling radiation piece is a sheet metal part with a hole in the middle. The first clamping assembly and the second clamping assembly are located on one side of the base plate part, the third clamping assembly is located on the other side of the base plate part, the fourth clamping assembly is formed in the middle of the base plate part, the first clamping assembly is used for being connected with the guiding structure, and the second clamping assembly is used for being connected with the guiding structure. The second clamping assembly is used for connecting the coupling radiation part, the third clamping assembly is used for connecting the radiation body, and the fourth clamping assembly is used for connecting the feed sheet. The ultra-wideband radiation unit and the antenna provided by the invention have relatively wide working frequency bands.

Description

Technical Field

[0001] This application relates to the technical field of antennas, and particularly to an ultra-wideband radiation element and an antenna. Background Art

[0002] The function of the radiation element of an antenna is to convert a high-frequency current signal into an electromagnetic signal, or convert an electromagnetic signal into a current signal. Generally, the radiation element includes a balun and a dipole arm disposed at the balun, and the dipole arm forms a polarized radiation sub-unit by coupling a corresponding feed sheet.

[0003] To obtain a larger bandwidth for the above-mentioned radiation element, it is generally achieved by increasing the width of the dipole arm or adjusting the size of the director plate. However, the effect of adjusting the bandwidth of the antenna in this way is limited. Summary of the Invention

[0004] One object of the present invention is to provide an ultra-wideband radiation element with a relatively wide operating frequency band.

[0005] Another object of the present invention is to improve the structural stability.

[0006] A further object of the present invention is to enhance the directivity.

[0007] An embodiment of the present invention provides an ultra-wideband radiation element, including a connecting member, a radiator connected to the connecting member, a coupling radiator, a feed sheet, and a director structure. The coupling radiator is a sheet metal part with an opening in the middle. The radiation surface size of the coupling radiator is determined according to the target operating frequency band. The distance between the coupling radiator and the radiator, and the size and shape of the opening are determined according to the standing wave ratio under the target operating frequency band. The connecting member includes a substrate part, a first clamping component and a second clamping component on one side of the substrate part, a third clamping component on the other side of the substrate part, and a fourth clamping component formed in the middle of the substrate part. The first clamping component is used to connect the director structure, the second clamping component is used to connect the coupling radiator, the third clamping component is used to connect the radiator, and the fourth clamping component is used to connect the feed sheet.

[0008] Optionally, the director structure includes a director support member, an upper director sheet and a lower director sheet respectively connected to both ends of the director support member, and the lower director sheet is disposed close to the coupling radiator.

[0009] Optionally, both the upper director sheet and the lower director sheet are circular, and the diameter of the upper director sheet is greater than or equal to the diameter of the lower director sheet.

[0010] Optionally, the lower director sheet is provided with a plurality of first clamping holes arranged circumferentially;

[0011] The first clamping component includes a plurality of first clamping arms, and each of the first clamping arms is clamped in cooperation with each of the first clamping holes.

[0012] Optionally, the coupling radiator includes a radiation panel and polarization arms connected to the periphery of the radiation panel, and a plurality of second clamping holes are provided in the radiation panel;

[0013] The second clamping component includes a plurality of second clamping arms, and each of the second clamping arms is clamped in cooperation with each of the second clamping holes.

[0014] Optionally, a plurality of limiting strips protrude from one side of the connecting member facing the coupling radiator, and the limiting strips have a supporting surface for supporting the coupling radiator.

[0015] Optionally, the radiator is provided with a first through-hole group for passing through the feeding sheet, the first through-hole group includes two first through-holes, the connecting member is provided with a second through-hole group, the second through-hole group includes two second through-holes, each of the second through-holes is aligned with the first through-hole, and the feeding sheet includes a transverse arm portion extending out of the connecting member, and the transverse arm portion is lapped between the two second through-holes of the same second through-hole group.

[0016] Optionally, a limiting recess is provided in a portion of the connecting member between the two through-holes of the second through-hole group, and the limiting recess is used for inserting the transverse arm portion.

[0017] Optionally, the number of the feeding sheets is 2, and the transverse arm portions of the two feeding sheets are arranged in a cross manner. The middle of one of the transverse arm portions is recessed to make way for the other transverse arm portion, and the two transverse arm portions do not protrude from the side of the connecting member where the first clamping component is provided.

[0018] In particular, the present application further provides an antenna, including the ultra-wideband radiation unit described in any one of the above.

[0019] According to the first aspect of the present invention, the radiation unit adopts a coupled double-radiation surface structure, that is, it includes a radiator and a coupling radiator, so that the bandwidth of the antenna with this radiation unit is significantly improved, thereby improving the versatility of the antenna. Further, since the coupling radiator adopts a sheet metal part, the manufacturing process is simpler and more efficient, which helps to reduce costs and shorten the production cycle. And the sheet metal part is easy to process and value, so the shape and size of the coupling radiator can be adjusted accordingly according to different application scenarios and requirements, with high flexibility.

[0020] Further, the connector in this embodiment can connect the director structure, the coupled radiator, the radiator, and the feeding patch simultaneously through the settings of the first clamping component, the second clamping component, the third clamping component, and the fourth clamping component. Therefore, the number of connecting components is reduced, the utilization rate of the connector is improved, and it is beneficial to enhance the stability of the entire structure.

[0021] According to the second aspect of the present application, since the double-layer director structure is adopted, the main lobe gain can be improved, the directivity can be enhanced, and the gain of the antenna can be increased. When using two layers of directors with different sizes, the convergence of the radiation pattern can also be improved, further enhancing the directivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of an ultra-wideband radiation unit according to an embodiment of the present invention;

[0023] Figure 2 is Figure 1 an exploded schematic diagram of the ultra-wideband radiation unit;

[0024] Figure 3 is a schematic structural diagram of the connector of the ultra-wideband radiation unit according to an embodiment of the present invention;

[0025] Figure 4 is an assembly schematic diagram of the connector of the ultra-wideband radiation unit and the coupled radiator according to an embodiment of the present invention;

[0026] Figure 5 is a cross-sectional view of the connector, the feeding patch, and the radiator of the ultra-wideband radiation unit according to an embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of an antenna according to an embodiment of the present invention;

[0028] Figure 7 is a standing wave curve graph of an antenna according to an embodiment of the present invention;

[0029] Figure 8 is a radiation pattern of an antenna according to an embodiment of the present invention;

[0030] Reference numerals:

[0031] Ultra-wideband radiation unit 100, radiator 10, first through-hole 101, slot 102, feed piece 20, cross arm part 21, coupling radiation element 30, opening 301, radiation panel 31, second clamping hole 311, polarization arm 32, connecting piece 40, second through-hole 401, first clamping arm 41, second clamping arm 42, third clamping arm 43, fourth clamping arm 44, substrate part 45, limiting strip 46, limiting recess 47, guiding structure 50, upper guiding piece 51, guiding support 52, lower guiding piece 53, first clamping hole 531, insulating gasket 60, reflector 70. Detailed implementation manners

[0032] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application 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 application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0033] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0036] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0037] Figure 1 It is a schematic structural diagram of an ultra-wideband radiation unit 100 according to an embodiment of the present invention. Figure 2 is Figure 1 exploded schematic diagram of the ultra-wideband radiation unit 100. Figure 3 It is a schematic structural diagram of a connector 40 of the ultra-wideband radiation unit 100 according to an embodiment of the present invention. As Figure 1 shown, in one embodiment, the ultra-wideband radiation unit 100 includes a connector 40, a radiator 10 connected to the connector 40, a coupled radiation member 30, a feeding sheet 20, and a director structure 50. As Figure 2 shown, the coupled radiation member 30 is a sheet metal part with an opening 301 in the middle, that is, a layout made by comprehensive cold working process on a metal plate. The radiation surface size of the coupled radiation member 30 is determined according to the target operating frequency band. The distance between the coupled radiation member 30 and the radiator 10, and the size and shape of the opening 301 are determined according to the standing wave ratio at the target operating frequency band. Generally, a suitable size of the opening 301 can be obtained through simulation. Specifically, the opening 301 is adjusted with the goal that the standing wave ratio within the target operating frequency band is greater than a preset value until the standing wave ratio within the target operating frequency band is greater than the preset value. Taking Figure 1 and Figure 2 the circular coupled radiation member 30 in as an example, the coupled radiation member 30 includes a radiation panel 31 and polarization arms 32 (arranged along the polarization direction) connected to the periphery of the radiation panel 31. In the polarization direction, the size of the radiation surface of the coupled radiation member 30 can be set to 0.5 times the wavelength of the lowest frequency of the target operating frequency band. The diameter of the radiation panel 31 can be 0.5 times the wavelength of the highest frequency of the target operating frequency band. The size of the radiation surface of the radiator 10 in the polarization direction is set to 0.5 times the wavelength of the center frequency of the target operating frequency band. As Figure 3As shown, the connecting member 40 includes a substrate portion 45, a first clamping component and a second clamping component located on one side of the substrate portion 45, a third clamping component located on the other side of the substrate portion 45, and a fourth clamping component formed in the middle of the substrate portion 45. The first clamping component is used to connect the director structure 50, the second clamping component is used to connect the coupled radiator 30, the third clamping component is used to connect the radiator 10, and the fourth clamping component is used to connect the feeding sheet 20. The radiator 10 has a dual-polarized radiation surface, which may include two pairs of polarized oscillator surfaces, such as a conventional dipole radiation surface, a folded dipole radiation surface, or a dipole radiation surface in the form of a patch formed by patches, or other common dipole radiation surfaces, which are not limited here. The coupled radiator 30 is used to couple with the radiator 10, and the size of the opening 301 in the middle thereof determines the coupling amount with the radiator 10 to achieve broadband matching. The outer shape of the coupled radiator 30 may be common shapes such as circular or square, and the shape of the opening 301 may be Figure 2 the cross shape in

[0038] In this embodiment, the radiation unit adopts a coupled dual-radiation surface structure, that is, it includes a radiator 10 and a coupled radiator 30, so that the bandwidth of the antenna with this radiation unit is significantly improved, thereby improving the versatility of the antenna. Further, since the coupled radiator 30 is made of a sheet metal part, the manufacturing process is simpler and more efficient, which helps to reduce costs and shorten the production cycle. And the sheet metal part is easy to process and set values, so the shape and size of the opening 301 of the coupled radiator 30 can be adjusted accordingly according to different application scenarios and requirements, so as to meet the design requirements of different target operating frequency bands, and the flexibility is relatively high.

[0039] As Figure 2 shown, the opening 301 is set to be a cross shape, and the cross shape direction is arranged staggered with the polarization direction, so that it can meet the maximum demand of the opening 301 under certain target frequency bands and ensure the connection strength of the polarization arm 32.

[0040] Further, in this embodiment, the connecting member 40 can connect the director structure 50, the coupled radiator 30, the radiator 10, and the feeding sheet 20 at the same time through the settings of the first clamping component, the second clamping component, the third clamping component, and the fourth clamping component. Therefore, the number of connecting components is reduced, the utilization rate of the connecting member 40 is improved, and it is beneficial to improve the stability of the entire structure.

[0041] In one embodiment, as Figure 1 shown, it can also be seen in Figure 2, the director structure 50 includes a director support 52, an upper director sheet 51 and a lower director sheet 53 respectively connected to both ends of the director support 52, and the lower director sheet 53 is disposed close to the coupling radiator 30. In this embodiment, both the upper director sheet 51 and the lower director sheet 53 are circular, and the diameter of the upper director sheet 51 is greater than or equal to the diameter of the lower director sheet 53. Mounting holes are provided at the centers of the upper director sheet 51 and the lower director sheet 53 for snap-fitting with the director support 52.

[0042] This embodiment adopts a double-layer director sheet structure, which can improve the main lobe gain, enhance the directivity, and increase the gain of the antenna. When using two director sheets with different sizes, the convergence of the radiation pattern can also be improved, further enhancing the directivity.

[0043] Figure 4 It is an assembly schematic diagram of the connector 40 and the coupling radiator 30 of the ultra-wideband radiation unit 100 according to an embodiment of the present invention. In one embodiment, as Figure 3 shown, the first snap-fitting component of the connector 40 includes a plurality of first snap-fitting arms 41, and the lower director sheet 53 is provided with a plurality of first snap-fitting holes 531 arranged circumferentially, and each first snap-fitting arm 41 is snap-fitted with each first snap-fitting hole 531. As Figure 4 shown, a plurality of second snap-fitting holes 311 are provided at the radiation panel 31. The second snap-fitting component includes a plurality of second snap-fitting arms 42, and each second snap-fitting arm 42 is snap-fitted with each second snap-fitting hole 311. A plurality of limiting strips 46 also protrude from the side of the connector 40 facing the coupling radiator 30, and the limiting strips 46 have a support surface for supporting the coupling radiator 30. Here, the connector 40 can be made of plastic. The third snap-fitting component of the connector 40 includes a plurality of third snap-fitting arms 43, and a gap 102 is provided at the top surface of the radiator 10, and the third snap-fitting arms 43 extend into the gap 102.

[0044] In this embodiment, the coupling radiator 30 is supported by the support surface of the limiting strip 46 and snap-fitted by a plurality of second snap-fitting arms 42, so that the coupling radiator 30 can be firmly connected to the connector 40.

[0045] Figure 5 It is a cross-sectional view of the connector 40, the feeding sheet 20 and the radiator 10 of the ultra-wideband radiation unit 100 according to an embodiment of the present invention. Further, the radiator 10 can be formed by die-casting, as Figure 5As shown in the figure, the radiator 10 is provided with a first through-hole 101 group for passing through the feeding sheet 20. The first through-hole 101 group includes two first through-holes 101. The connecting member 40 is provided with a second through-hole 401 group. The second through-hole 401 group includes two second through-holes 401. Each second through-hole 401 is aligned with the first through-hole 101. The feeding sheet 20 includes a cross-arm portion 21 extending out of the connecting member 40. The cross-arm portion 21 is lapped between the two second through-holes 401 of the same second through-hole 401 group. The number of feeding sheets 20 is 2. Therefore, the number of the corresponding first through-hole 101 group and second through-hole 401 group is also 2. In this embodiment, the cross-arm portions 21 of the two feeding sheets 20 are arranged crosswise. As Figure 3 shown, a limiting recess 47 is provided in the portion of the connecting member 40 between the two through-holes of the second through-hole 401 group. The limiting recess 47 is used for inserting the cross-arm portion 21. The fourth clamping assembly includes 4 fourth clamping arms 44. The fourth clamping arms 44 can be arranged near each second through-hole 401 so that each feeding sheet 20 is clamped by two fourth clamping arms 44. The middle of one cross-arm portion 21 is recessed to make way for the other cross-arm portion 21. The two cross-arm portions 21 do not protrude from the side of the connecting member 40 where the first clamping assembly is provided.

[0046] In this embodiment, the feeding sheet 20 is limited by the limiting recess 47 on the connecting portion, and then cooperated with the clamping of the fourth clamping arm 44, the stable connection of the feeding sheet 20 at the connecting member 40 can be realized. Further, through the sinking of the limiting recess 47 and the recessed setting of the middle of one feeding sheet 20, the two feeding sheets 20 can be made not to protrude from the surface of the connecting member 40, so as to play a protective role for the feeding sheet 20.

[0047] Figure 6 is a schematic structural diagram of an antenna according to an embodiment of the present invention. As Figure 6 shown, the present application also provides an antenna. The antenna includes the above-mentioned ultra-wideband radiation unit 100. The ultra-wideband radiation unit 100 is connected to the reflector 70. An insulating gasket 60 is further provided between the ultra-wideband radiation unit 100 and the reflector 70.

[0048] Figure 7 is a standing wave curve graph of an antenna according to an embodiment of the present invention. Figure 7 In the figure, the two curves correspond to two polarized antennas. The abscissa is the frequency (unit: GHz), and the ordinate is the standing wave ratio. As Figure 7 shown, the standing wave ratios of the two polarized antennas of the above-mentioned antenna including the ultra-wideband radiation unit 100 are less than 1.5. The frequency band range is 1.4 GHz - 2.7 GHz, and the relative bandwidth is 63.5%. The bandwidth is relatively wide, and the antenna performance is excellent.

[0049] Figure 8 is a radiation pattern of an antenna according to an embodiment of the present invention. Figure 8The radiation pattern of a partial operating frequency band (1.43 GHz - 1.72 GHz) is shown. As Figure 8 shown, the waveform of the radiation pattern of this antenna converges, and it has good directivity in the frequency band.

[0050] The above-described embodiments merely represent several 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 invention 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 fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An ultra-wideband radiation unit, characterized in that: It includes a connecting piece, a radiator connected to the connecting piece, a coupling radiator, a feeding plate and a guiding structure, the coupling radiator is a sheet metal piece with an opening in the middle, the radiation surface size of the coupling radiator is determined according to the target working frequency band, the distance between the coupling radiator and the radiator, the size and shape of the opening are determined according to the standing wave ratio in the target working frequency band, the connecting piece includes a substrate part, a first clamping component and a second clamping component located on one side of the substrate part, a third clamping component located on the other side of the substrate part and a fourth clamping component formed in the middle of the substrate part, the first clamping component is used to connect the guiding structure, the second clamping component is used to connect the coupling radiator, the third clamping component is used to connect the radiator, and the fourth clamping component is used to connect the feeding plate.

2. The ultra-wideband radiation unit according to claim 1, characterized in that: The guiding structure comprises a guiding support member and an upper guiding plate and a lower guiding plate respectively connected to two ends of the guiding support member, and the lower guiding plate is arranged close to the coupling radiation member.

3. The ultra-wideband radiation unit according to claim 2, characterized in that: The upper guide plate and the lower guide plate are both circular, and the diameter of the upper guide plate is greater than or equal to the diameter of the lower guide plate.

4. The ultra-wideband radiation unit according to claim 2 or 3, characterized in that: The lower guide plate is provided with a plurality of first clamping holes arranged along the circumferential direction; The first clamping assembly includes a plurality of first clamping arms, and each of the first clamping arms is clamped in cooperation with each of the first clamping holes.

5. The ultra-wideband radiation unit according to claim 1, characterized in that: The coupling radiation element comprises a radiation panel and a polarization arm connected to the peripheral side of the radiation panel, and a plurality of second clamping holes are provided at the radiation panel; The second clamping assembly includes a plurality of second clamping arms, and each of the second clamping arms is clamped in cooperation with each of the second clamping holes.

6. The ultra-wideband radiation unit according to claim 5, characterized in that: A plurality of limiting strips are also protruded from one side of the connecting member facing the coupling radiating member, and the limiting strips have a supporting surface for supporting the coupling radiating member.

7. The ultra-wideband radiation unit according to claim 1, characterized in that: The radiator is provided with a first through hole group for penetrating the feeding plate, the first through hole group includes two first through holes, the connecting member is provided with a second through hole group, the second through hole group includes two second through holes, each of the second through holes is aligned with the first through hole, and the feeding plate includes a cross arm portion extending out of the connecting member, the cross arm portion overlaps between the two second through holes in the same second through hole group.

8. The ultra-wideband radiation unit according to claim 7, characterized in that: The connecting member is provided with a limiting recess in a portion between two of the through holes of the second through hole group, and the limiting recess is used for inserting the cross arm portion.

9. The ultra-wideband radiation unit according to claim 7 or 8, characterized in that: The number of the feed plates is 2 and the cross arms of the two feed plates are arranged crosswise, wherein the middle portion of one of the cross arms is recessed to make way for the other cross arm, and the two cross arms do not protrude from the side of the connector where the first clamping assembly is provided.

10. An antenna, characterized in that: The invention comprises the ultra-wideband radiation unit according to any one of claims 1 to 9.

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