Compact dielectric resonator antenna module

Abstract

The application discloses a compact dielectric resonator antenna module, which comprises a substrate assembly and a dielectric resonator arranged on the substrate assembly. The dielectric resonator comprises a connecting part and four isosceles trapezoidal columns. The height of the connecting part is less than the height of the isosceles trapezoidal columns. The four isosceles trapezoidal columns are evenly distributed around the connecting part. The short bottom surface of the isosceles trapezoidal column is connected with the connecting part. The long bottom surface of the isosceles trapezoidal column has a compensation part extending away from the connecting part. The connecting part, the isosceles trapezoidal column and the compensation part are integrally formed into an integrated structure. The dielectric resonator antenna module has a compact structure and a small overall volume. The dielectric resonator only needs to be installed once as a whole, thereby reducing the alignment error generated in the installation process and facilitating the guarantee of the antenna performance. The height difference between the connecting part and the isosceles trapezoidal column in the height direction achieves a decoupling effect to some extent, thereby reducing the coupling between the isosceles trapezoidal columns. The dielectric resonator antenna module can cover the N258 frequency band in 5G.

Description

Technical Field

[0001] This invention relates to the field of antenna technology, and in particular to a compact dielectric resonator antenna module. Background Technology

[0002] As a global focus of research and development, 5G technology development and standardization have become industry consensus. At the 22nd meeting of ITU-R-WP5D in June 2015, the International Telecommunication Union (ITU) clearly defined three main application scenarios for 5G: enhanced mobile broadband, massive machine-type communications, and ultra-reliable low-latency communications. These three application scenarios correspond to different key indicators. In the enhanced mobile broadband scenario, the peak user speed is 20Gbps, and the minimum user experience rate is 100Mbps. The high carrier frequency and large bandwidth characteristics unique to millimeter waves are the main means to achieve the ultra-high data transmission rates of 5G. Furthermore, the space reserved for 5G antennas in future mobile phones is limited, necessitating the design of miniaturized antenna modules.

[0003] Dielectric resonator antennas made of ceramic bodies offer significant advantages due to their high manufacturing precision, small size, and lower cost in the millimeter-wave band. Conventional 5G terminal millimeter-wave antenna designs typically have 1×4 elements. If a DRA (dielectric resonator antenna) design is used, four discrete dielectric resonators are required for installation, and the bonding and fixing of these resonators must be repeated four times. This design method results in significant discrepancies between simulated and actual antenna performance. If the antenna is designed as a single unit, the installation of the four elements only requires one step, reducing uncertainties and facilitating mass production. Therefore, a four-element integrated dielectric resonator antenna module is urgently needed. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a compact dielectric resonator antenna module that is easy to mass-produce.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a compact dielectric resonator antenna module, including a substrate assembly and a dielectric resonator disposed on the substrate assembly. The dielectric resonator includes a connecting part and four isosceles trapezoidal prisms. The height of the connecting part is less than the height of the isosceles trapezoidal prisms. The four isosceles trapezoidal prisms are evenly distributed around the connecting part. The short base of the isosceles trapezoidal prisms is connected to the connecting part. The long base of the isosceles trapezoidal prisms has a compensation part extending away from the connecting part. The connecting part, the isosceles trapezoidal prisms and the compensation part are integrally formed into a single structure.

[0006] The beneficial effects of this invention are as follows: the dielectric resonator antenna module has a compact structure and small overall size; integrating four dielectric resonator units into one unit allows the dielectric resonator to be installed as a whole in one go, significantly reducing alignment errors generated during the installation of the dielectric resonator units and ensuring the antenna performance of the dielectric resonator antenna module; the height difference formed between the connecting part and the isosceles trapezoidal column in the height direction achieves a decoupling effect to a certain extent, reducing the coupling between the isosceles trapezoidal columns; this dielectric resonator antenna module can cover the N258 frequency band in 5G. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of the compact dielectric resonator antenna module according to Embodiment 1 of the present invention;

[0009] Figure 2 This is a top view of the compact dielectric resonator antenna module according to Embodiment 1 of the present invention;

[0010] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0011] Figure 4 This is a schematic diagram of the compact dielectric resonator antenna module according to another perspective of Embodiment 1 of the present invention;

[0012] Figure 5 This is a schematic diagram of the ground plane structure in the compact dielectric resonator antenna module according to Embodiment 1 of the present invention;

[0013] Figure 6 This is an S-parameter diagram of the compact dielectric resonator antenna module according to Embodiment 1 of the present invention.

[0014] Explanation of icon numbers:

[0015] 1. Dielectric substrate;

[0016] 2. Stratum; 21. Coupling fracture;

[0017] 3. Microstrip matching line;

[0018] 4. Chip components;

[0019] 5. Dielectric resonator; 51. Connecting part; 511. First column; 512. Second column; 513. Slot; 52. Isosceles trapezoidal column; 53. Compensation part;

[0020] 61. Metal pillar; 62. First metal part; 63. Second metal part. Detailed Implementation

[0021] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0024] Furthermore, if the embodiments of the present invention involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0025] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0026] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Example 1

[0028] Please refer to Figures 1 to 6 The first embodiment of the present invention is as follows: Please refer to... Figure 1 and Figure 4 A compact dielectric resonator antenna module includes a substrate assembly and a dielectric resonator 5 disposed on the substrate assembly. The substrate assembly includes a dielectric substrate 1, a ground layer 2, a microstrip matching line 3, and a chip assembly 4. The microstrip matching line 3 and the chip assembly 4 are respectively disposed on the bottom surface of the dielectric substrate 1. The chip assembly 4 is electrically connected to the microstrip matching line 3. The ground layer 2 is disposed on the top surface of the dielectric substrate 1, and the dielectric resonator 5 is disposed on the ground layer 2. The chip assembly 4 includes a radio frequency chip. Optionally, the chip assembly 4 and the microstrip matching line 3 are electrically connected via BGA solder balls.

[0029] Please combine Figures 1 to 3 The dielectric resonator 5 includes a connecting portion 51 and four isosceles trapezoidal columns 52. The four isosceles trapezoidal columns 52 are the same size. The height of the connecting portion 51 is less than the height of the isosceles trapezoidal columns 52. The four isosceles trapezoidal columns 52 are evenly distributed around the connecting portion 51. The short base of the isosceles trapezoidal column 52 is connected to the connecting portion 51. The long base of the isosceles trapezoidal column 52 has a compensation portion 53 extending away from the connecting portion 51. The connecting portion 51, the isosceles trapezoidal column 52 and the compensation portion 53 are integrally formed into a single structure. It should be noted that the short base of the isosceles trapezoidal column 52 refers to the plane containing the short base of the cross-section (which is an isosceles trapezoid) of the isosceles trapezoidal column 52, and this short base is perpendicular to the stratum 2. Similarly, the long base of the isosceles trapezoidal column 52 refers to the plane containing the long base of the cross-section (which is an isosceles trapezoid) of the isosceles trapezoidal column 52, and this long base is perpendicular to the stratum 2. The four isosceles trapezoidal columns 52 are evenly distributed at 90° intervals around the central axis of the connecting part 51, which is equivalent to forming a 2×2 array packaged antenna module. This antenna module structure is more compact and, compared with the existing 1×4 linear array, not only can it achieve higher gain, but it also has the advantage of a lower profile.

[0030] In this embodiment, the top surface of the compensation part 53 is coplanar with the top surface of the isosceles trapezoidal column 52, the bottom surface of the compensation part 53 is coplanar with the bottom surface of the isosceles trapezoidal column 52, and the surface of the compensation part 53 away from the short base is an arc surface. That is to say, due to the presence of the compensation part 53, the isosceles trapezoidal column 52 looks approximately fan-shaped.

[0031] Please combine Figure 1 , Figure 4 and Figure 5 The ground layer 2 has a coupling slot 21, which corresponds to the isosceles trapezoidal column 52. The microstrip matching line 3 is used to feed the isosceles trapezoidal column 52. It can be understood that a portion of the microstrip matching line 3 corresponds to the coupling slot 21. In this embodiment, the coupling slot 21 is triangular. Specifically, there are four coupling slots 21, each corresponding to one of the four isosceles trapezoidal columns 52. Preferably, the coupling slot 21 corresponds to the central region of the base of the isosceles trapezoidal column 52. This dielectric resonator 5 antenna module uses a microstrip slot coupling feeding method, which simplifies the manufacturing process, helps reduce costs, and facilitates mass production.

[0032] Please combine Figures 2 to 4 Specifically, the connecting portion 51 includes a first column 511 located at the center of the four isosceles trapezoidal columns 52 and a second column 512 protruding relative to the bottom surface of the isosceles trapezoidal columns 52. The first column 511 is connected to the second column 512. The ground layer 2 and the dielectric substrate 1 are respectively provided with through holes for the second column 512 to pass through. The end of the second column 512 away from the first column 511 protrudes relative to the bottom surface of the dielectric substrate 1. The outer wall of the first column 511 is connected to the isosceles trapezoidal columns 52. The top surface of the first column 511 is lower than the top surface of the isosceles trapezoidal columns 52. The empty area above the first column 511 achieves a decoupling effect to a certain extent, reducing the coupling between the isosceles trapezoidal columns 52.

[0033] Please combine Figures 1 to 3 To further improve the antenna performance of the compact dielectric resonator antenna module, the dielectric resonator 5 is provided with a decoupling structure.

[0034] In this embodiment, the decoupling structure includes a metal pillar 61 disposed at the center of the connecting portion 51, a first metal portion 62 disposed on the short base surface of the isosceles trapezoidal pillar 52, and a second metal portion 63 disposed on the outer wall of the connecting portion 51. The connecting portion 51 has a hole adapted to the metal pillar 61. The first metal portion 62 can be either a metal sheet connected to the isosceles trapezoidal pillar 52 or a metal layer deposited on the short base surface. Similarly, the second metal portion 63 can be either a metal sheet connected to the connecting portion 51 or a metal layer deposited on the outer wall of the connecting portion 51.

[0035] Preferably, the first metal part 62 completely covers the area of ​​the short bottom surface that is not connected to the connecting part 51; the second metal part 63 is in contact with and connected to the stratum 2.

[0036] The outer wall of the connecting part 51 is provided with a groove 513, and the second metal part 63 is located in the groove 513. Specifically, the groove 513 is located on the outer wall of the first column 511. The presence of the groove 513 allows the second metal part 63 to better perform its decoupling effect.

[0037] Next, let me explain the inventor's design concept:

[0038] The four DRA antenna elements are in the shape of isosceles triangular prisms. The side length of the isosceles triangular cross section is 4.15mm*4.15mm*2.2mm, the height of the isosceles triangular prism is 4mm, the material is ceramic, and the dielectric constant DK=10.

[0039] After the four DRA antenna elements are integrated into an array, the middle part is hollowed out for initial decoupling, and a part is retained as a connecting part. The connecting part is then extended downward to obtain the connecting part. At this time, the DRA antenna element becomes an isosceles trapezoidal prism. In order to compensate for the dielectric loss caused by the hollowing out, a compensation part is added to the long base of the isosceles trapezoidal prism.

[0040] Then, the above-mentioned decoupling structure is set on the integrated dielectric resonator.

[0041] Figure 6 The figure shows the S-parameters of the compact dielectric resonator antenna module designed according to the above design concept. It can be seen from the figure that this compact dielectric resonator antenna module covers 21-28GHz and can be used in the 5G millimeter wave N258 band.

[0042] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A compact dielectric resonator antenna module comprising a substrate assembly and a dielectric resonator provided on the substrate assembly, characterized in that: The medium resonator comprises a connecting part and four isosceles trapezoidal columns, the height of the connecting part is less than the height of the isosceles trapezoidal columns to form a recessed area, the four isosceles trapezoidal columns are evenly distributed around the connecting part, the short base of the isosceles trapezoidal column connects the connecting part, the long base of the isosceles trapezoidal column has a compensation part extending away from the connecting part, the connecting part, the isosceles trapezoidal column and the compensation part are integrally formed into an integrated structure; The medium resonator is provided with a decoupling structure, the decoupling structure comprises a metal column arranged in the center of the connecting part, a first metal part arranged on the short base of the isosceles trapezoidal column and a second metal part arranged on the outer wall of the connecting part, the connecting part has a hole matched with the metal column, the outer wall of the connecting part is provided with a slot, and the second metal part is located in the slot.

2. The compact dielectric resonator antenna module of claim 1, wherein: The top surface of the compensation part is coplanar with the top surface of the isosceles trapezoidal column, the bottom surface of the compensation part is coplanar with the bottom surface of the isosceles trapezoidal column, and the surface of the compensation part away from the short base is an arc surface.

3. The compact dielectric resonator antenna module of claim 1, wherein: The substrate assembly comprises a medium substrate, a ground layer and a microstrip matching line, the ground layer is arranged on the top surface of the medium substrate, the medium resonator is arranged on the ground layer, the ground layer has a coupling gap, the coupling gap is arranged corresponding to the isosceles trapezoidal column, and the microstrip matching line is arranged on the bottom surface of the medium substrate and used for feeding the isosceles trapezoidal column.

4. The compact dielectric resonator antenna module of claim 3, wherein: The substrate assembly further comprises a chip assembly, the chip assembly is arranged on the bottom surface of the medium substrate and electrically connected with the microstrip matching line.

5. The compact dielectric resonator antenna module of claim 3, wherein: The coupling gap is triangular.

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