Air medium RNRD antenna structure

Abstract

The utility model discloses an air dielectric RNRD antenna structure. The air dielectric RNRD antenna structure comprises a ground reflecting plate, a dielectric plate, a radiation sheet assembly, a grounding coupling assembly and a feed assembly. The dielectric plate is arranged on one side of the ground reflecting plate, and the dielectric plate and the ground reflecting plate are arranged at an interval to form a gap for air medium circulation; the radiation sheet assembly comprises a first radiation sheet and a second radiation sheet, the first radiation sheet and the second radiation sheet are attached to the side, back to the ground reflection plate, of the dielectric plate, the first radiation sheet is provided with a hollow area, the second radiation sheet is located in the hollow area, the grounding coupling assembly comprises a grounding coupling branch knot and an induction sheet, and the feed assembly comprises a coupling feed point. And a direct feeding point and a direct feeding needle. According to the technical scheme of the utility model, the grounding coupling assembly, the feed assembly, the first radiation sheet and the second radiation sheet generate direct feed or coupled feed, so that the section of the RNRD antenna structure is lower, the size and the volume are lighter, and the manufacturing cost of the antenna is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of antenna equipment, in particular to an air dielectric RNRD antenna structure. Background Art

[0002] Antennas are particularly important as key components of the satellite signal transceiver system, which directly determines whether the entire system works properly. Existing conventional RNRD (it should be noted here that RNRD in this application refers to the general term for RNSS and RDSS, where RNSS stands for Radio Navigation Satellite System, which is a satellite radio navigation service, and RDSS stands for Radio Determination Satellite Service, which is a satellite radio determination service) antennas are usually implemented in the form of multi-layer vertically stacked microstrip antennas, which have the problems of high profile height, large size and weight, and high cost. Utility Model Content

[0003] The main purpose of the utility model is to provide an air dielectric RNRD antenna structure, aiming to make the cross-sectional height of the RNRD antenna structure lower, the volume lighter, and reduce the manufacturing cost of the antenna.

[0004] To achieve the above objectives, the utility model proposes an air dielectric RNRD antenna structure, comprising:

[0005] Ground reflector;

[0006] a dielectric plate, disposed on one side of the ground reflector and spaced apart from the ground reflector to form a gap for air medium to flow;

[0007] A radiation sheet assembly, comprising a first radiation sheet and a second radiation sheet, wherein the first radiation sheet and the second radiation sheet are attached to a side of the dielectric plate facing away from the ground reflection plate, the first radiation sheet has a hollow area, and the second radiation sheet is located in the hollow area, so that the inner edge of the first radiation sheet can enclose the outer edge of the second radiation sheet;

[0008] A ground coupling component, comprising a ground coupling branch and an induction sheet, wherein the ground coupling branch is arranged in the gap and is configured to support and connect between the ground reflection plate and the dielectric plate, the induction sheet is attached to a side of the dielectric plate facing away from the ground reflection plate and is connected to the ground coupling branch, and the induction sheet and the ground coupling branch are configured to couple with the first radiation sheet; and

[0009] A feeding component, comprising a coupling feeding point, a coupling feeding pin, a direct feeding point and a direct feeding pin, wherein the coupling feeding point is arranged on the first radiating plate, the coupling feeding pin is located in the gap and is electrically connected to the coupling feeding point, and the coupling feeding pin is configured to couple and feed with the first radiating plate, the direct feeding point is arranged on the second radiating plate, the direct feeding pin is located in the gap and is electrically connected to the direct feeding point, and the direct feeding pin is configured to couple and feed with the second radiating plate.

[0010] It can be further configured that the feeding component also includes a printed sheet, the printed sheet is attached to the side of the dielectric plate facing the ground reflector, the printed sheet is located below the coupling feeding point, and the coupling feeding needle penetrates the printed sheet to connect with the coupling feeding point.

[0011] It can be further configured that the ground coupling branch includes a metal column, the upper end of the metal column penetrates the dielectric plate and is connected to the induction plate, and the lower end of the metal column is connected to a side of the ground reflection plate facing the dielectric plate.

[0012] It can be further configured that the ground coupling branch also includes a support tube sleeved on the outside of the metal column, the upper end of the support tube is connected to the side of the dielectric plate facing the ground reflection plate, and the lower end of the support tube is connected to the side of the ground reflection plate facing the dielectric plate.

[0013] It can be further configured that the ground coupling branch is provided in plurality.

[0014] It can be further configured that the plurality of ground coupling branches are symmetrically distributed with the central axis of the first radiation sheet as the symmetry center, and / or,

[0015] The plurality of ground coupling branches are equidistantly arranged in a ring shape with the central axis of the first radiation plate as a circle.

[0016] It can be further configured that the sensing sheet is in an arc shape, and a plurality of the sensing sheets are staggeredly distributed on concentric circles with different radii from the central axis of the first radiation sheet.

[0017] It can be further configured that the air dielectric RNRD antenna structure also includes a short-circuit pin, which is located in the gap and connects the first radiation plate and the ground reflection plate, and the short-circuit pin is configured to couple with the second radiation plate.

[0018] It can be further configured that the inner edge of the first radiation piece is convexly formed with a protrusion toward the direction of the second radiation piece, the protrusion is electrically connected to the short-circuit needle, and the outer edge of the second radiation piece is concavely formed with a recessed portion corresponding to the protrusion, and the protrusion can fill the inner space of the recessed portion to make the short-circuit needle close to the second radiation piece.

[0019] It can be further configured that a positioning piece is provided on the outer periphery of the first radiation piece, and the dielectric plate is provided with a limiting groove corresponding to the position of the positioning piece, and the positioning piece can be embedded in the limiting groove to fix the first radiation piece on the dielectric plate.

[0020] The technical solution of the utility model adopts the method of installing the first radiating plate and the second radiating plate on the dielectric plate, and generating direct feeding or coupled feeding with the first radiating plate and the second radiating plate through the ground coupling component and the feeding component, thereby integrating different functions of the RNRD antenna on the same plane, making the cross-section of the RNRD antenna structure lower, the size and volume lighter, and reducing the manufacturing cost of the antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A bottom view of an air dielectric RNRD antenna structure according to an embodiment of the utility model;

[0023] Figure 2 for Figure 1 A side view of the air dielectric RNRD antenna structure in FIG.

[0024] Figure 3 for Figure 1 Structural diagram of the ground coupling component and the feeding component of the air dielectric RNRD antenna structure;

[0025] Figure 4 for Figure 1 A partial enlarged view of the middle A;

[0026] Figure 5 for Figure 1 Schematic diagram of the structure of the ground-coupled branch of the air dielectric RNRD antenna structure.

[0027] Description of Figure Numbers:

[0028] 1. Ground reflector;

[0029] 2. dielectric plate; 21. gap;

[0030] 3. Radiating plate assembly; 31. first radiating plate; 311. raised portion; 312. positioning plate; 32. second radiating plate; 321. recessed portion; 33. hollow area; 34. gap;

[0031] 4. ground coupling assembly; 41. ground coupling branch; 411. metal column; 412. support tube; 42. induction sheet;

[0032] 5. Feeding assembly; 51. Coupling feeding point; 52. Coupling feeding pin; 53. Direct feeding point; 54. Direct feeding pin; 55. Printed sheet;

[0033] 6. Short-circuit pin.

[0034] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0038] (It should be noted here that the antenna in this application integrates S short message, L short message and full-frequency GNSS positioning functions)

[0039] like Figures 1 to 5 As shown, the utility model proposes an air dielectric RNRD antenna structure, referring to Figure 1 and Figure 2 , including: a ground reflector 1, a dielectric plate 2, a radiation piece assembly 3, a ground coupling assembly 4 and a feeding assembly 5. The dielectric plate 2 is arranged on one side of the ground reflector 1 and is spaced from the ground reflector 1 to form a gap 21 through which air medium flows. The radiation piece assembly 3 includes a first radiation piece 31 and a second radiation piece 32, the first radiation piece 31 and the second radiation piece 32 are attached to the side of the dielectric plate 2 that is not facing the ground reflector 1, the first radiation piece 31 has a hollow area 33, and the second radiation piece 32 is located in the hollow area 33, so that the inner edge of the first radiation piece 31 can enclose the outer edge of the second radiation piece 32. The ground coupling assembly 4 includes a ground coupling branch 41 and an induction piece 42, the ground coupling branch 41 is arranged in the gap 21 and is configured to support and connect between the ground reflector 1 and the dielectric plate 2, the induction piece 42 is attached to the side of the dielectric plate 2 that is not facing the ground reflector 1 and is connected to the ground coupling branch 41, and the induction piece 42 and the ground coupling branch 41 are configured to couple with the first radiation piece 31. The feeding component 5 includes a coupling feeding point 51, a coupling feeding needle 52, a direct feeding point 53 and a direct feeding needle 54. The coupling feeding point 51 is arranged on the first radiation plate 31, the coupling feeding needle 52 is located in the gap 21 and is electrically connected to the coupling feeding point 51, and the coupling feeding needle 52 is configured to couple and feed with the first radiation plate 31. The direct feeding point 53 is arranged on the second radiation plate 32, the direct feeding needle 54 is located in the gap 21 and is electrically connected to the direct feeding point 53, and the direct feeding needle 54 is configured to couple and feed with the second radiation plate 32.

[0040] The technical solution achieves the integration of different functions of the RNRD antenna on the same plane by installing the first radiating plate 31 and the second radiating plate 32 on the dielectric plate 2, and generating direct feeding or coupled feeding with the first radiating plate 31 and the second radiating plate 32 through the ground coupling component 4 and the feeding component 5, so as to make the cross-section of the RNRD antenna structure lower, the volume lighter, and reduce the manufacturing cost of the antenna.

[0041] Specifically, in this embodiment, the diameter of the ground reflector 1 is 130 mm, the thickness of the dielectric plate 2 is 1 mm, the dielectric constant of the dielectric plate 2 is 4.4, and the vertical projection area of ​​the dielectric plate 2 can fall into the reflector surface of the ground reflector 1, and the radiation can be controlled to the direction of one side of the dielectric plate 2 through the ground reflector 1. The first radiation plate 31 is a low-frequency radiation plate of the GNSS positioning antenna, and the second radiation plate 32 is a short message S antenna radiation plate. The first radiation plate 31 and the second radiation plate 32 are located on the same plane, thereby solving the problem that the height of the antenna is too high due to the stacking structure of multiple radiation plates with different functions in the prior art, and reducing the height of the overall structure of the antenna.

[0042] The full-frequency GNSS positioning function consists of a low-frequency part of 1164-1278MHz and a high-frequency part of 1560-1592MHz. The low-frequency part is generated by the low-frequency radiation surface of the first radiation plate 31, and the high-frequency part is formed by the ground coupling branch 41 and the low-frequency radiation surface of the first radiation plate 31.

[0043] The low-frequency radiation plate and the coupled feeding point 51 of the GNSS positioning antenna adopt coupled dual-feed coaxial feeding to realize the full-frequency GNSS positioning function. Compared with the traditional direct feeding, the coupled feeding has a wider impedance bandwidth.

[0044] L short message function, since the bandwidth of the low-frequency radiation plate of the GNSS positioning antenna is sufficient to cover the L frequency band of the short message and it is dual-fed, the two output ports of a 3dB bridge can simultaneously obtain the left-hand circularly polarized short message L antenna band and the right-hand circularly polarized positioning antenna band.

[0045] The S short message function is realized by direct feeding between the second radiation plate 32 and the direct feeding point 53 .

[0046] It should be noted here that when the second radiation sheet 32 ​​is filled into the hollow area 33, a gap 34 is created between the first radiation sheet 31 and the second radiation sheet 32. In this way, due to the existence of the gap 34, the first radiation sheet 31 and the second radiation sheet 32 ​​will not interfere with each other and thus fail to work, and can work stably to complete their respective functions, and the width of the gap 34 can be limited according to product requirements.

[0047] View Figure 4 In other embodiments, it can be further configured that the feeding component 5 also includes a printed sheet 55, and the printed sheet 55 is attached to the side of the dielectric plate 2 facing the ground reflection plate 1, and the printed sheet 55 is located below the coupling feeding point 51, and the coupling feeding needle 52 penetrates the printed sheet 55 and is connected to the coupling feeding point 51.

[0048] Specifically, in this embodiment, the printed sheet 55 is rectangular (the shape is not particularly limited here), and the printed sheet 55 can form an equivalent capacitor with the first radiation sheet 31 through the dielectric plate 2, thereby playing an impedance matching role in the feeding of the low-frequency radiation sheet of the GNSS positioning antenna.

[0049] View Figure 3 In other embodiments, it can be further configured that the ground coupling branch 41 includes a metal column 411, the upper end of the metal column 411 penetrates the dielectric plate 2 and is connected to the induction plate 42, and the lower end of the metal column 411 is connected to the side of the ground reflection plate 1 facing the dielectric plate 2.

[0050] Specifically, in this embodiment, the metal column 411 can be selected as a copper column. In this way, the ground coupling branch 41 can play a supporting role, supported between the ground reflection plate 1 and the dielectric plate 2 and forming a gap 21, and the cylindrical shape has better load-bearing and frequency reduction effects, effectively reducing the size of the antenna.

[0051] View Figure 5 In other embodiments, it can be further configured that the ground coupling branch 41 also includes a support tube 412 sleeved on the outside of the metal column 411, the upper end of the support tube 412 is connected to the side of the dielectric plate 2 facing the ground reflection plate 1, and the lower end of the support tube 412 is connected to the side of the ground reflection plate 1 facing the dielectric plate 2.

[0052] In this way, the support tube 412 can be better supported between the ground reflection plate 1 and the dielectric plate 2 , thereby sharing the pressure of the dielectric plate 2 borne by the metal column 411 and improving the service life of the metal column 411 .

[0053] In other embodiments, it may be further configured that a plurality of ground coupling branches 41 are provided.

[0054] In this way, the coupling effect with the first radiation plate 31 can be enhanced through the multiple ground coupling branches 41, thereby improving the performance of the RNRD antenna.

[0055] In other embodiments, it can be further configured that the multiple ground coupling branches 41 are symmetrically distributed with the central axis of the first radiation plate 31 as the symmetry center, and / or the multiple ground coupling branches 41 are equidistantly arranged in a ring with the central axis of the first radiation plate 31 as the circle.

[0056] In this way, by symmetrically distributing the multiple ground coupling branches 41, symmetrical antenna coupling can be achieved, which can improve the performance and stability of the antenna system to a certain extent, and can also simplify the system design and debugging process.

[0057] In this way, by arranging a plurality of ground coupling branches 41 in a circular shape with equal spacing, mutual coupling between antennas can be achieved. This coupling method can change the radiation characteristics of the antenna.

[0058] Replay Figure 1 Specifically, in this embodiment, 8 ground coupling branches 41 are arranged, and are arranged at 45° intervals with the central axis of the first radiation plate 31 as a circle. They can be distributed equidistantly and symmetrically, which can enhance the coupling effect between the first radiation plate 31 and the ground coupling branch 41, thereby enhancing the performance of the RNRD antenna.

[0059] In other embodiments, it can be further configured that the sensing piece 42 is in an arc shape, and a plurality of sensing pieces 42 are staggeredly distributed on concentric circles with different radii from the central axis of the first radiation piece 31 .

[0060] Specifically, in this embodiment, in order to better couple the ground coupling branch 41 with the first radiation plate 31, the side length of the arc of the plurality of induction plates 42 exceeds the circumference of the circle of the radius. To this end, the induction plates 42 are distributed on concentric circles with different outer diameters with the central axis of the first radiation plate 31 as the center, thereby enhancing the coupling effect between the induction plates 42 and the first radiation plate 31.

[0061] It should be noted here that, in this embodiment, the ground coupling branch 41 includes a metal column 411 arranged in the inner circle, and a metal column 411 with a support tube 412 in the outer circle. For the sake of convenience, the metal column 411 located in the inner circle is called X, and the metal column 411 located in the outer circle with a support tube 412 is called Y. Both X and Y can produce coupling and frequency reduction effects with the first radiation plate 31, wherein the contribution of X to the coupling effect is greater than that of Y, and the contribution of Y to the frequency reduction effect is greater than that of X.

[0062] In other embodiments, it can be further configured that the air dielectric RNRD antenna structure also includes a short-circuit needle 6, which is located in the gap 21 and connects the first radiation plate 31 and the ground reflection plate 1, and the short-circuit needle 6 is configured to couple with the second radiation plate 32.

[0063] In this way, the short-circuit needle 6 connects the first radiation plate 31 and the ground reflector 1 , and through the coupling effect with the second radiation plate 32 , plays a certain impedance matching role in the feeding of the second radiation plate 32 .

[0064] View Figure 4 In other embodiments, it can be further configured that the inner edge of the first radiation plate 31 bulges outward toward the direction of the second radiation plate 32 to form a protrusion 311, the protrusion 311 is electrically connected to the short-circuit needle 6, and the outer edge of the second radiation plate 32 is concave to form a recessed portion 321 corresponding to the protrusion 311, and the protrusion 311 can fill the inner space of the recessed portion 321 to make the short-circuit needle 6 close to the second radiation plate 32.

[0065] In this way, the distance between the short-circuit needle 6 and the second radiation plate 32 can be shortened, thereby enhancing the coupling effect between the short-circuit needle 6 and the second radiation plate 32 .

[0066] In other embodiments, it can be further configured that a positioning piece 312 is provided on the outer periphery of the first radiation piece 31, and a limiting groove is provided on the dielectric plate 2 corresponding to the position of the positioning piece 312, and the positioning piece 312 can be embedded in the limiting groove to fix the first radiation piece 31 on the dielectric plate 2.

[0067] In this way, not only the connection strength between the dielectric plate 2 and the first radiation plate 31 is improved, but also through the correspondence between the positioning plate 312 and the limit groove, it is beneficial for the grounding coupling branch 41, the coupling feeding needle 52, the direct feeding needle 54 and the short-circuit needle 6 that need to penetrate the dielectric plate 2 to correspond to the reserved holes processed on the dielectric plate 2, thereby improving production efficiency.

[0068] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air dielectric RNRD antenna structure, characterized in that: include: Ground reflector; a dielectric plate, disposed on one side of the ground reflector and spaced apart from the ground reflector to form a gap for air medium to flow; A radiation sheet assembly, comprising a first radiation sheet and a second radiation sheet, wherein the first radiation sheet and the second radiation sheet are attached to a side of the dielectric plate facing away from the ground reflection plate, the first radiation sheet has a hollow area, and the second radiation sheet is located in the hollow area, so that the inner edge of the first radiation sheet can enclose the outer edge of the second radiation sheet; A ground coupling component, comprising a ground coupling branch and an induction sheet, wherein the ground coupling branch is arranged in the gap and is configured to support and connect between the ground reflection plate and the dielectric plate, the induction sheet is attached to a side of the dielectric plate facing away from the ground reflection plate and is connected to the ground coupling branch, and the induction sheet and the ground coupling branch are configured to couple with the first radiation sheet; as well as, A feeding component, comprising a coupling feeding point, a coupling feeding pin, a direct feeding point and a direct feeding pin, wherein the coupling feeding point is arranged on the first radiating plate, the coupling feeding pin is located in the gap and is electrically connected to the coupling feeding point, and the coupling feeding pin is configured to couple and feed with the first radiating plate, the direct feeding point is arranged on the second radiating plate, the direct feeding pin is located in the gap and is electrically connected to the direct feeding point, and the direct feeding pin is configured to couple and feed with the second radiating plate.

2. An air dielectric RNRD antenna structure as claimed in claim 1, characterized in that: The feeding assembly also includes a printed sheet, which is attached to a side of the dielectric plate facing the ground reflector, and is located below the coupling feeding point. The coupling feeding needle penetrates the printed sheet and is connected to the coupling feeding point.

3. The air dielectric RNRD antenna structure according to claim 1, characterized in that: The ground coupling branch comprises a metal column, the upper end of the metal column penetrates the dielectric plate and is connected to the induction sheet, and the lower end of the metal column is connected to a side of the ground reflection plate facing the dielectric plate.

4. The air dielectric RNRD antenna structure according to claim 3, characterized in that: The ground coupling branch also includes a support tube sleeved on the outside of the metal column, the upper end of the support tube is connected to the side of the dielectric plate facing the ground reflection plate, and the lower end of the support tube is connected to the side of the ground reflection plate facing the dielectric plate.

5. The air dielectric RNRD antenna structure according to claim 1, characterized in that: There are a plurality of ground coupling branches.

6. An air dielectric RNRD antenna structure as claimed in claim 5, characterized in that: The plurality of ground coupling branches are symmetrically distributed with the central axis of the first radiation sheet as the symmetry center, and / or, The plurality of ground coupling branches are equidistantly arranged in a ring shape with the central axis of the first radiation plate as a circle.

7. The air dielectric RNRD antenna structure according to claim 5, characterized in that: The induction sheet is in an arc shape, and a plurality of the induction sheets are staggeredly distributed on concentric circles with different radii from the central axis of the first radiation sheet.

8. The air dielectric RNRD antenna structure according to claim 1, characterized in that: The air dielectric RNRD antenna structure further includes a short-circuit pin, which is located in the gap and connects the first radiation plate and the ground reflection plate, and is configured to couple with the second radiation plate.

9. An air dielectric RNRD antenna structure as claimed in claim 8, characterized in that: The inner edge of the first radiation sheet is convex toward the direction of the second radiation sheet to form a protrusion, and the protrusion is electrically connected to the short-circuit needle. The outer edge of the second radiation sheet is concave to form a recessed portion corresponding to the protrusion, and the protrusion can fill the inner space of the recessed portion to make the short-circuit needle close to the second radiation sheet.

10. The air dielectric RNRD antenna structure according to claim 1, characterized in that: A positioning piece is arranged at the outer periphery of the first radiation piece, and a limiting groove is arranged on the dielectric plate corresponding to the position of the positioning piece. The positioning piece can be embedded in the limiting groove to fix the first radiation piece on the dielectric plate.

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