Broadband millimeter wave dielectric resonator antenna with comb-shaped slot coupled feeding

Abstract

The invention provides a broadband millimeter wave dielectric resonator antenna for comb-shaped slot coupled feeding. The broadband millimeter wave dielectric resonator antenna comprises an input port, a fork-shaped microstrip feeder line, a substrate, a comb-shaped feeding slot, a ground plane, a bowl-shaped metal wall and a slotted dielectric radiator, a fork-shaped micro-strip feeder line is arranged below the substrate, and the fork-shaped micro-strip feeder line is connected with an input port; a ground plane is arranged above the substrate, and a comb-shaped feed slot is formed in the middle of the ground plane; a slotted medium radiator is arranged above the ground plane, and a bowl-shaped metal wall is arranged on the peripheral side of the slotted medium radiator; and the fork-shaped micro-strip feeder line is connected with the slotted medium radiator through a comb-shaped feed slot electromagnetic signal. According to the invention, the bowl-shaped metal wall structure is adopted to improve the radiation gain, and the structure is simpler and is convenient to process.

Description

Technical Field

[0001] The present invention relates to the technical field of dielectric materials and antennas, and in particular to a broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding. Background Art

[0002] The number of wireless devices is increasing year by year, leading to greater channel capacity, wider bandwidth, and faster transmission rates in wireless communication systems. Antennas, as key transmitting and receiving components in wireless communication devices, must also adapt to higher performance targets, developing towards broadband, multi-functionality, and high gain. Dielectric resonator antennas stand out with their flexible structure, low loss, and high radiation efficiency, demonstrating broad development prospects. Based on traditional dielectric resonator antennas, different structures are required to achieve high gain and broadband, but existing structural designs are complex, hindered by difficult processing and high costs. For example, patent publication number CN119674545A relates to a dielectric resonator antenna with a complex dielectric block structure on the baseplate, making it difficult to process. Patent publication number CN115986382A relates to a dielectric resonator antenna, a dielectric resonator antenna module, and an electronic device. These devices also fail to address the issues of complex structure and difficult processing. Summary of the Invention

[0003] In view of the defects in the prior art, the object of the present invention is to provide a broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding.

[0004] According to the present invention, a broadband (having an impedance bandwidth of 94.4%) millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding is provided, comprising: an input port, a fork-shaped microstrip feed line, a substrate, a comb-shaped feeding slot, a ground plane, a bowl-shaped metal wall, and a slotted dielectric radiator;

[0005] A fork-shaped microstrip feed line is provided below the substrate, and the fork-shaped microstrip feed line is connected to the input port;

[0006] A ground plane is provided above the substrate, and a comb-shaped feeding gap is provided in the middle of the ground plane;

[0007] A slotted dielectric radiator is arranged above the ground plane, and a bowl-shaped metal wall is arranged around the slotted dielectric radiator;

[0008] The fork-shaped microstrip feed line is connected to the slotted dielectric radiator via a comb-shaped feeding slot electromagnetic signal.

[0009] Preferably, the slotted dielectric radiator includes: a high dielectric constant slotted dielectric radiator and a low dielectric constant slotted dielectric radiator;

[0010] The dielectrics of the high-dielectric-constant slotted dielectric radiator and the low-dielectric-constant slotted dielectric radiator are arranged to overlap.

[0011] Preferably, both the high-dielectric-constant slotted dielectric radiator and the low-dielectric-constant slotted dielectric radiator are provided with symmetrical rectangular slots.

[0012] Preferably, the characteristic impedance of the fork-shaped microstrip feed line is 50 ohm.

[0013] Preferably, the substrate is Rogers RT5880, the dielectric constant of the substrate is 2.2, and the loss tangent value is 0.0009.

[0014] Preferably, the ground plane is in a square shape with a size of 8.6 mm×8.6 mm.

[0015] Preferably, the bowl-shaped metal wall is configured as a bowl-shaped structure with a wide opening at one end and a narrow opening at the other end, and the narrow opening end of the bowl-shaped metal wall is placed on the ground plane.

[0016] Preferably, the bowl-shaped metal wall has a wide opening radius of 10 mm, a narrow opening radius of 8 mm, a height of 3 mm, and a wall thickness of 0.5 mm.

[0017] Preferably, the material of the high dielectric constant slotted dielectric radiator is Rogers RO3010, and the dielectric constant is 10.2;

[0018] The material of the low dielectric constant slotted dielectric radiator is Rogers RO4450, and the dielectric constant is 3.54.

[0019] Rogers RT5880, Rogers RO3010, and Rogers RO4450 are commonly used material model names in this field.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This application uses a bowl-shaped metal wall structure to achieve improved radiation gain. Compared with traditional design methods such as multiple feed sources or shaped feed sources, this structure is simpler and easier to process.

[0022] 2. The slotted dielectric radiator of the present application is different from the traditional structural shape deformation. Instead, it is based on the coupling of the comb-shaped feeding gap between the dielectric and the bowl-shaped metal wall, and uses the comb-shaped gap excitation to generate multi-mode resonance to improve the bandwidth. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1This is a schematic diagram of the three-dimensional structure of the dielectric resonator antenna of the present application;

[0025] Figure 2 Schematic diagram of a top view of a dielectric resonator antenna;

[0026] Figure 3 is a schematic diagram of a main view of a dielectric resonator antenna;

[0027] Figure 4 It is a top view of the comb-shaped feeding slot;

[0028] Figure 5 is the S parameter of the dielectric resonator antenna;

[0029] Figure 6 The radiation pattern of the dielectric resonator antenna of this application at 35GHz

[0030] As shown in the figure:

[0031] DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figure 1-4 As shown, this embodiment relates to a broadband millimeter-wave dielectric resonator antenna with comb-slot coupling feeding, comprising: an input port 1, a fork-shaped microstrip feed line 2, a substrate 3, a comb-shaped feeding slot 4, a ground plane 5, a bowl-shaped metal wall 6 and a slotted dielectric radiator; wherein: the fork-shaped microstrip feed line 2 inputs the electromagnetic signal through the input port 1, the comb-shaped feeding slot 4 connects the electromagnetic signal of the fork-shaped microstrip feed line 2 to the slotted dielectric radiator surrounded by the bowl-shaped metal wall 6, and the slotted dielectric radiator is used for electromagnetic energy emission.

[0035] Specifically, a fork-shaped microstrip feed line 2 is arranged below the substrate 3, and the fork-shaped microstrip feed line 2 is connected to the input port 1. A ground plane 5 is arranged above the substrate 3, and a comb-shaped feeding gap 4 is arranged in the middle of the ground plane 5. A slotted dielectric radiator is arranged above the ground plane 5, and a bowl-shaped metal wall 6 is arranged on the surrounding side of the slotted dielectric radiator. The fork-shaped microstrip feed line 2 is connected to the slotted dielectric radiator through the comb-shaped feeding gap 4 through electromagnetic signals.

[0036] The slotted dielectric radiator includes a high-permittivity slotted dielectric radiator 7 and a low-permittivity slotted dielectric radiator 8. The dielectrics of the high-permittivity slotted dielectric radiator 7 and the low-permittivity slotted dielectric radiator 8 are arranged in an overlapping manner. Both the high-permittivity slotted dielectric radiator 7 and the low-permittivity slotted dielectric radiator 8 are provided with symmetrical rectangular slots.

[0037] In one embodiment, the characteristic impedance of the fork-shaped microstrip feed line 2 is 50 ohm.

[0038] In one embodiment, the substrate 3 is made of Rogers RT5880, the dielectric constant of the substrate 3 is 2.2, and the loss tangent value is 0.0009.

[0039] In one embodiment, the ground plane 5 is square in shape and has a size of 8.6 mm×8.6 mm.

[0040] In one embodiment, the bowl-shaped metal wall 6 is configured as a bowl-shaped structure with a wide opening at one end and a narrow opening at the other end, and the narrow opening of the bowl-shaped metal wall 6 is placed on the ground plane 5. The bowl-shaped metal wall 6 has a wide opening radius of 10 mm, a narrow opening radius of 8 mm, a height of 3 mm, and a wall thickness of 0.5 mm.

[0041] In one embodiment, the material of the high-dielectric-constant slotted dielectric radiator 7 is Rogers RO3010, with a dielectric constant of 10.2, and the material of the low-dielectric-constant slotted dielectric radiator 8 is Rogers RO4450, with a dielectric constant of 3.54.

[0042] like Figure 5 The S parameters of the dielectric resonator antenna show that the impedance bandwidth of the antenna reaches 94.4%, which has broadband characteristics.

[0043] like Figure 6 The radiation pattern of the dielectric resonator antenna at 35 GHz shows that the antenna has good radiation effect.

[0044] Working principle:

[0045] First, an electromagnetic signal is transmitted from the input port 1 to the fork-shaped microstrip feed line 2. The bifurcated end of the fork-shaped microstrip feed line 2 transmits the electromagnetic signal through the comb-shaped feed slot 4 to the slotted dielectric radiator. During this process, the electromagnetic signal is coupled through the comb-shaped feed slot 4 and the bowl-shaped metal wall 6 around the slotted dielectric radiator, and the multi-mode resonance generated by the comb-shaped feed slot 4 is used to excite the dielectric radiator, thereby widening the bandwidth, and finally emitting electromagnetic energy through the slotted dielectric radiator.

[0046] Example 2

[0047] Example 2 is a preferred example of Example 1.

[0048] like Figure 1-4 As shown, this embodiment includes: an input port 1, a fork-shaped microstrip feed line 2, a substrate 3, a comb-shaped feed slot 4, a ground plane 5, a bowl-shaped metal wall 6, a high-dielectric-constant slotted dielectric radiator 7, and a low-dielectric-constant slotted dielectric radiator 8; wherein,

[0049] The fork-shaped microstrip feed line 2 inputs the electromagnetic signal through the input port 1 at one end; the comb-shaped feeding slot 4 transmits the electromagnetic signal of the fork-shaped microstrip feed line 2 to the slotted dielectric radiator; the slotted dielectric radiator adopts the dielectric overlapping form of a high dielectric constant slotted dielectric radiator 7 and a low dielectric constant slotted dielectric radiator 8 for electromagnetic energy emission.

[0050] In one embodiment, the comb-shaped feeding slot 4 is a hollow portion in the middle of the ground plane 5 , with a total length of 2.9 mm.

[0051] In one embodiment, the bowl-shaped metal wall 6 is placed in the middle of the ground plane 5 and surrounds the slotted dielectric radiator, with a wide radius of 10 mm, a narrow radius of 8 mm, a height of 3 mm, and a wall thickness of 0.5 mm.

[0052] In one embodiment, the high dielectric constant slotted dielectric radiator 7 is made of Rogers RO3010 with a dielectric constant of 10.2, and the low dielectric constant slotted dielectric radiator 8 is made of Rogers RO4450 with a dielectric constant of 3.54. Both have symmetrical rectangular slots and are placed on the ground plane 5.

[0053] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0054] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding, characterized in that: include: An input port (1), a forked microstrip feed line (2), a substrate (3), a comb-shaped feed slot (4), a ground plane (5), a bowl-shaped metal wall (6), and a slotted dielectric radiator; A fork-shaped microstrip feed line (2) is provided below the substrate (3), and the fork-shaped microstrip feed line (2) is connected to the input port (1); A ground plane (5) is provided above the substrate (3), and a comb-shaped feeding gap (4) is provided in the middle of the ground plane (5); A slotted dielectric radiator is provided above the ground plane (5), and a bowl-shaped metal wall (6) is provided on the periphery of the slotted dielectric radiator; The forked microstrip feed line (2) is connected to the slotted dielectric radiator via an electromagnetic signal through a comb-shaped feeding gap (4).

2. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 1, characterized in that: The slotted dielectric radiator comprises: a high dielectric constant slotted dielectric radiator (7) and a low dielectric constant slotted dielectric radiator (8); The dielectrics of the high dielectric constant slotted dielectric radiator (7) and the low dielectric constant slotted dielectric radiator (8) are arranged in an overlapping manner.

3. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 2, characterized in that: Symmetrical rectangular slots are provided on both the high-dielectric-constant slotted dielectric radiator (7) and the low-dielectric-constant slotted dielectric radiator (8).

4. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 1, characterized in that: The characteristic impedance of the fork-shaped microstrip feed line (2) is 50 ohm.

5. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 1, characterized in that: The substrate (3) is Rogers RT5880, and the dielectric constant of the substrate (3) is 2.2, and the loss tangent value is 0.0009.

6. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 1, characterized in that: The ground plane (5) is in the shape of a square and has a size of 8.6 mm×8.6 mm.

7. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 1, characterized in that: The bowl-shaped metal wall (6) is configured as a bowl-shaped structure with a wide opening at one end and a narrow opening at the other end, and the narrow opening end of the bowl-shaped metal wall (6) is placed on the ground plane (5).

8. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 7, characterized in that: The bowl-shaped metal wall (6) has a wide opening radius of 10 mm, a narrow opening radius of 8 mm, a height of 3 mm, and a wall thickness of 0.5 mm.

9. The broadband millimeter-wave dielectric resonator antenna with comb-shaped slot coupling feeding according to claim 1, characterized in that: The material of the high dielectric constant slotted dielectric radiator (7) is Rogers RO3010, and the dielectric constant is 10.2; The material of the low dielectric constant slotted dielectric radiator (8) is Rogers RO4450, and the dielectric constant is 3.54.

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