Ridge waveguide antenna

Abstract

The utility model discloses a ridge waveguide antenna, which comprises a feed layer and a radiation layer, metal bulges are distributed on the contact surface of the feed layer and the radiation layer, and through holes matched with the metal bulges are arranged on the radiation layer. According to the utility model, the metal projection array and the holes corresponding to the metal projection array are constructed on the radiation layer and the feed layer, and the conductive connection material is filled in the holes or the holes as a connection mode, so that the matching structure of the metal projections and the through holes only needs to ensure that the metal projection array is fully contacted with the corresponding holes; therefore, the propagation path of electromagnetic waves can be limited in a required channel, and the ridge waveguide antenna allows certain gaps to exist among layers of the waveguide antenna without affecting the performance of the antenna.

Description

Technical Field

[0001] The utility model relates to the technical field of waveguide devices, in particular to a ridge waveguide antenna. Background Art

[0002] Waveguide devices are microwave components that use waveguide structures to control or process electromagnetic waves. The main function of waveguide devices is to guide the propagation of electromagnetic waves. By designing the structure and size of the waveguide, the transmission characteristics of electromagnetic waves can be precisely controlled. The assembly of multi-layer waveguide antennas requires that the layers fit tightly together. Once there is a gap, electromagnetic waves will leak from the channel, and the antenna performance will be affected.

[0003] Existing assembly and bonding methods often use methods such as screw locking, SMT soldering, hot melt welding, and conductive adhesive coating, which not only requires each layer of the waveguide plate to have extremely high processing accuracy and flatness, but also places extremely high demands on the assembly and bonding effect. Whether it is insufficient flatness or poor assembly and bonding effect, gaps will be generated, resulting in electromagnetic wave leakage problems. Utility Model Content

[0004] The utility model aims to provide a ridge waveguide antenna to solve the technical problem of electromagnetic wave leakage of the ridge waveguide antenna in the prior art, because the existing ridge waveguide antenna cannot ensure extremely high flatness between waveguide plates in the manufacturing process.

[0005] In order to solve the above technical problems, the utility model specifically provides the following technical solutions:

[0006] A ridge waveguide antenna comprises a feed layer and a radiation layer, wherein metal protrusions are distributed on the surface of the feed layer in contact with the radiation layer, and through holes matching with the metal protrusions are arranged on the radiation layer, and the metal protrusions are matched and connected with the through holes so that the feed layer and the radiation layer form a whole.

[0007] As a preferred solution of the utility model, the metal protrusions and the through holes are matched and connected and evenly distributed around the transmission channel of the antenna electromagnetic wave formed by the feeding layer and the radiation layer, so as to confine the electromagnetic wave within the transmission channel.

[0008] As a preferred solution of the present utility model, the metal protrusion includes but is not limited to an ellipsoid structure, a cylindrical structure or a cuboid structure.

[0009] As a preferred solution of the utility model, the conductive material filled in the through hole makes the surface of the metal protrusion fully contact with the surface of the through hole.

[0010] As a preferred solution of the utility model, the conductive material includes but is not limited to solder paste, conductive adhesive, pressure-sensitive adhesive tape or copper foil.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model constructs a metal protrusion array and corresponding holes on the radiation layer and the feed layer, and fills the holes or holes with conductive connecting materials as a connection method. The matching structure of the metal protrusion and the through hole only needs to ensure that the metal protrusion array and the corresponding hole are in full contact, so as to limit the propagation path of the electromagnetic wave to the electromagnetic wave transmission channel formed by the array distribution. The ridge waveguide antenna realized by the utility model allows a certain gap between the structural layers of the waveguide antenna, and can improve the antenna performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure in which the radiation layer and the feed layer of an embodiment of the utility model are assembled into a whole;

[0016] Figure 3 Schematic diagram of a change in the gap ym between the feeding layer and the radiation layer according to an embodiment of the present invention as the spacing p between two adjacent first structures, specifically protrusions;

[0017] Figure 4 The electromagnetic leakage and impedance matching of an embodiment of the present invention is a schematic diagram of the electric field distribution of the feeding layer;

[0018] Figure 5 A schematic diagram of the feeder S parameter structure of the feed layer in the case of electromagnetic leakage and impedance matching in an embodiment of the present invention;

[0019] Figure 6 This is a schematic diagram of the electric field distribution of the feeding layer in the case of electromagnetic leakage and impedance mismatch in an embodiment of the present invention;

[0020] Figure 7 A schematic diagram of feeder S parameters of the feed layer in the case of electromagnetic leakage and impedance mismatch in an embodiment of the present invention.

[0021] The numbers in the figure represent the following:

[0022] 1-feeding layer; 2-radiation layer; 3-metal protrusion; 4-through hole; 5-feeding slot; 6-radiation slot; 7-slot antenna; 8-waveguide ridge. DETAILED DESCRIPTION

[0023] 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 in 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.

[0024] like Figure 1 and Figure 2 As shown, the utility model provides a ridge waveguide antenna, including a feed layer 1 and a radiation layer 2, metal protrusions 3 are distributed on the surface where the feed layer 1 contacts the radiation layer 2, through holes 4 matching with the metal protrusions 3 are arranged on the radiation layer 2, and the metal protrusions 3 are matched with the through holes 4 to form a whole with the feed layer 1 and the radiation layer 2.

[0025] The metal protrusions 3 and the through holes 4 are connected and evenly distributed around the transmission channel of the antenna electromagnetic wave formed by the feeding layer 1 and the radiation layer 2, so as to confine the electromagnetic wave in the transmission channel.

[0026] That is, when a plurality of feeding slots 5 are arranged on the surface of the feeding layer 1, the metal protrusions 3 are distributed around the feeding slots 5, and the feeding slots 5 of the feeding layer 1 (or the slots on which the waveguide ridges are installed) and the radiation slots 6 of the radiation layer 2 are connected to form a transmission channel for the antenna electromagnetic waves.

[0027] Compared with the existing ridge waveguide antenna which requires large-area bonding between layers or bonding around channels, the ridge waveguide antenna provided by the utility model only needs to ensure that the metal protrusions 3 and through holes 4 set on the feeding layer and the radiation layer 2 are fully in contact and bonded.

[0028] In the specific implementation of the distribution of the metal protrusions 3 on the surface of the feed layer 1, the metal protrusions 3 are distributed on the surface of the feed layer 1 around the feed slot 5 of the feed layer 1, that is, the metal protrusions 3 located around the feed slot 5 and on both sides directly opposite the feed slot 5 are arranged one-to-one or symmetrically, the purpose of which is to make the electric field of the electromagnetic waves of the ridge waveguide antenna on the feed slot 5 evenly distributed, and at the same time, there is no impedance mismatch in the feed slot 5 (waveguide ridge or feed line of the feed layer) (based on the simulation after setting the protrusions and through-hole connections, that is, the electromagnetic waves are bound in the electromagnetic wave transmission channel of the antenna to avoid leakage). Thereby, a good electromagnetic shielding effect can be achieved, as shown in the following example. Figure 3 shown.

[0029] The metal protrusion 3 includes but is not limited to an ellipsoid structure, a cylindrical structure or a rectangular parallelepiped structure.

[0030] A conductive connecting material layer is coated on the contact surface of the feed layer 1 and the radiation layer 2 to connect the feed layer 1 and the radiation layer 2 , and the surface includes the surface of the metal protrusion 3 .

[0031] In actual design, the structure in which the metal protrusion 3 and the through hole 4 are connected in the present invention is not limited to being on the feeding layer 1 and the radiation layer 2, but can also be arranged on other hierarchical structures of the ridge waveguide antenna.

[0032] The conductive connection material layer includes but is not limited to solder paste, conductive adhesive, pressure-sensitive adhesive tape or copper foil.

[0033] Compared with the existing antenna structure in which the radiation layer and the feed layer are connected by large-area solder paste welding or conductive glue coating, the utility model does not need to have high requirements on the fit of the surface processing of the feed layer and the radiation layer. Therefore, the redundancy between the various layer structures of the ridge waveguide antenna is greater. Therefore, the ridge waveguide antenna provided by the present application has good conductivity and airtightness, thereby ensuring the yield rate of the ridge waveguide antenna during preparation.

[0034] Furthermore, during the preparation process of the ridge waveguide antenna provided in the utility model, the metal protrusions and blind hole connection methods allow a gap to exist between the radiation layer and the feeding layer without causing leakage of electromagnetic waves, which provides a larger operating window for the processing between the layers of the ridge waveguide antenna.

[0035] The utility model is based on the fact that electromagnetic leakage still occurs when the surface contact between the radiation layer and the feeding layer of the existing antenna can be as close as possible, but it does not mean that the surface gap between the radiation layer and the feeding layer can be as large as possible. Specifically:

[0036] The metal protrusions arranged around the feed slot body (waveguide ridge) are hemispherical structures, whose diameter (effective length) is d, the distance between the two protrusions is p, and the gap between the radiation layer and the waveguide feed slot body is ym.

[0037] Different metal protrusions require corresponding spacing p to achieve a better effect of preventing electromagnetic wave leakage. Ports are added at both ends of the feeding slot, and the length of the ridge waveguide is set to 10λ. When ym=0mm, the transmission coefficient of the waveguide ridge S21=0.35dB.

[0038] When ym is greater than 0mm, the return loss S11 of the feeder line is less than -15dB, and the transmission coefficient S21 is less than 0.5dB. It can be considered that the shielding effect of the feed slot on electromagnetic waves is good.

[0039] Figure 3 When the electromagnetic shielding effect is better, the gap ym between the radiation layer and the feeding slot changes with the spacing p under different metal protrusion diameters of the hemispherical structure.

[0040] Figure 3 The five curves in the figure represent the variation trend of the gap ym between the radiation layer and the feeding slot with the spacing p when the diameters of the hemispherical protrusions are 0.5 mm, 1 mm, 2 mm, 3 mm and 4 mm respectively. The area below each line indicates that the electromagnetic shielding effect of the feeding slot is good and there is no impedance mismatch of the transmission line.

[0041] For example Figure 3 When d=1mm, p=1.5mm and the gap ym=0.3mm, it indicates that the electromagnetic wave shielding is good and there is no mismatch.

[0042] like Figure 4 As shown in the figure, the electric field distribution on the upper surface of the feeding slot is shown, and it can be seen that there is no electromagnetic leakage. Figure 5 As shown, the S parameters of the feed line indicate good impedance matching.

[0043] like Figure 3 As shown in the figure, d = 1mm, p = 2.5mm, when the gap ym = 0.2mm, there is electromagnetic leakage and impedance mismatch, and its electric field distribution and S parameters are as follows Figure 6 and Figure 7 shown.

[0044] The above embodiments are only exemplary embodiments of the present application and are not intended to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present application within the essence and protection scope of the present application, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present application.

Claims

1. A ridge waveguide antenna, comprising a feed layer (1) and a radiation layer (2), characterized in that: Metal protrusions (3) are distributed on the surface of the feed layer (1) in contact with the radiation layer (2); through holes (4) matching with the metal protrusions (3) are provided on the radiation layer (2); the metal protrusions (3) and the through holes (4) are matched and connected so that the feed layer (1) and the radiation layer (2) form a whole.

2. A ridge waveguide antenna according to claim 1, characterized in that: The metal protrusions (3) and the through holes (4) are matched and connected and evenly distributed around the transmission channel of the antenna electromagnetic waves formed by the feeding layer (1) and the radiation layer (2), so as to confine the electromagnetic waves within the transmission channel.

3. A ridge waveguide antenna according to claim 1, characterized in that: The metal protrusion (3) comprises an ellipsoidal structure, a cylindrical structure or a rectangular parallelepiped structure.

4. A ridge waveguide antenna according to claim 1, characterized in that: The conductive material filled in the through hole (4) enables the surface of the metal protrusion (3) to fully contact the surface of the through hole (4).

5. A ridge waveguide antenna according to claim 4, characterized in that: The conductive material includes solder paste, conductive adhesive, pressure-sensitive adhesive tape or copper foil.

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