Dielectric resonator antenna capable of suppressing high-order mode based on slotted structure

Abstract

The utility model relates to a dielectric resonator antenna capable of suppressing a high-order mode based on a slotted structure, which comprises a metal grounding plate, a dielectric substrate, a rectangular microstrip line, a rectangular slot and a dielectric resonator, and is characterized in that the metal grounding plate is etched on the upper surface of the dielectric substrate, and the metal grounding plate and the dielectric substrate jointly form a cuboid antenna substrate; a rectangular gap is formed in the center position of the antenna substrate in a penetrating manner; the dielectric resonator is adhered to the center of the upper surface of the antenna substrate; the rectangular microstrip line is etched on the lower surface of the antenna substrate. According to the utility model, through the slotting design on the dielectric resonator antenna, the high-order mode of the antenna can be significantly suppressed, and more input power can be converted into effective radiation, thereby improving the radiation efficiency and gain of the antenna, achieving the effect of improving the signal strength and the transmission distance, and improving the performance of the antenna through the combination of the slotting design and the 3D printing technology. The antenna design is more flexible, and the customized antenna design can be realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the microwave technology antenna field technical field, concretely relates to a kind of dielectric resonator antenna based on slot structure can inhibit high mode. BACKGROUND

[0002] With the rapid development of 5G and 6G communication technology, the antenna, one of the important transmitting and receiving devices in wireless communication equipment, also needs to adapt to more high-performance indicators. Dielectric resonator antennas are widely used in military and commercial applications due to their simple structure, small planar size, and wide bandwidth.

[0003] The extreme distribution of high-mode electric field intensity is derived from the resonance standing wave superposition effect of electromagnetic waves on the dielectric boundary. In a typical dielectric resonator antenna, when the frequency of electromagnetic waves is higher than the cutoff frequency of the main mode, the electric field will generate a standing wave along the geometric dimension of the dielectric resonator, forming a ring-shaped extreme region in the dielectric resonator. However, the existence of high modes often leads to a decline in antenna performance. High modes reduce the radiation efficiency of the antenna because the electromagnetic waves they generate are not completely concentrated in the main radiation direction of the antenna, resulting in the waste of some power. In addition, high modes also increase interference because the additional resonant frequencies they generate interfere with the normal operation of the antenna, affecting communication quality. At the same time, high modes also limit the bandwidth of the antenna, making the performance of the antenna at certain frequencies limited. And high modes can also cause the main radiation direction of the antenna to deviate from the intended direction, changing the directional performance of the antenna and affecting the accuracy and stability of communication. To solve this problem, high-mode suppression technology has become a research hotspot.

[0004] Currently, there are some specific high-mode suppression examples. For example, by changing the dielectric constant and magnetic permeability of the antenna material, adjusting the transmission characteristics of electromagnetic waves to achieve the purpose of suppressing high modes. Or use a special coating or covering layer on the surface of the antenna to reflect or absorb the electromagnetic waves of high modes, thereby reducing their impact on antenna performance. Some researchers have optimized the layout and structure of antenna arrays to reduce high-mode interference. These methods have achieved some suppression of high modes to some extent. However, existing suppression methods still have shortcomings, such as complex manufacturing processes, difficulty in achieving precise control, etc. On the basis of dielectric resonator antennas, although there are many improvement measures for high-mode suppression, the structure design is still complex, difficult to process, and high in cost. Based on this, the present application achieves high-mode suppression by slotting design on the unslotted dielectric resonator antenna, and proposes a dielectric resonator antenna based on slot structure that can suppress high modes. SUMMARY

[0005] The utility model provides to solve the technical problem that the prior art is short of the technical problem that the prior art is short of, provide a kind of based on the medium resonator antenna of inhibiting high mode of grooving structure.

[0006] The utility model employs technical scheme: a kind of based on the medium resonator antenna of inhibiting high mode of grooving structure, including metal ground plate, dielectric substrate, rectangular microstrip line, rectangular gap and medium resonator, the metal ground plate etching on the upper surface of the dielectric substrate and both common constitute long rectangular antenna substrate, rectangular gap is also penetrated and set in the central position of antenna substrate;The medium resonator is adhered to the upper surface center of antenna substrate with conductive glue, and large cylindrical groove, large rectangular groove, small cylindrical groove, small rectangular groove are also set on the medium resonator;The rectangular microstrip line is etched to the lower surface of antenna substrate.

[0007] Preferably, the large cylindrical groove is four grooves distributed at the four corners of the medium resonator, and the large cylindrical groove has a quarter-cylindrical structure, and each large cylindrical groove has a small cylindrical groove formed on the side wall thereof, and the small cylindrical groove has a cylindrical structure;The large rectangular groove is two grooves symmetrically distributed on the left and right of the medium resonator, and the small rectangular groove is two grooves symmetrically distributed on the front and back of the medium resonator, and the large rectangular groove and the small rectangular groove have a cuboid structure.

[0008] Preferably, the projection center of the medium resonator on the antenna substrate coincides with the center of the upper surface of the antenna substrate, and the resonator rear edge of the medium resonator is parallel to the substrate front edge of the antenna substrate and the long side of the rectangular gap;The projection of the rectangular microstrip line on the antenna substrate is perpendicular to the rectangular gap in a cross shape, and the intersection center coincides with the center of the lower surface of the antenna substrate.

[0009] Preferably, the medium resonator has a 3D printing integrated structure.

[0010] Preferably, the metal ground plate is made of copper, the dielectric substrate is made of FR4, has a dielectric constant of 4.4 and a loss tangent of 0.02, the medium resonator has a dielectric constant of 30 and a loss tangent of 0.003, the rectangular gap has a narrow side of 1.2 mm and a long side of 11 mm, and the rectangular microstrip line is a copper-clad wire with a characteristic impedance of 50 Ω.

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

[0012] 1. The design can significantly suppress the high-order mode of the antenna by slotting the dielectric resonator antenna, reduce the energy dispersion and loss caused by high-order mode, concentrate more energy on the main mode for radiation, convert more input power into effective radiation, improve the radiation efficiency and gain of the antenna, achieve the effect of improving signal strength and transmission distance, and enhance the transmission quality and range of the signal.

[0013] 2. Through the precise 3D printing technology, the antenna parts with high precision size and shape can be manufactured, which significantly improves the manufacturing precision of the antenna and further enhances the performance stability of the antenna.

[0014] 3. The combination of slotting design and 3D printing technology makes the antenna design more flexible, which can flexibly design the antenna structure and shape that is difficult to realize in traditional processing according to actual needs, so as to realize customized antenna design and meet the needs of specific application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a whole semi-transparent diagram of the dielectric resonator antenna without slotting of the utility model;

[0016] Figure 2 is a whole semi-transparent diagram of the 3D printed dielectric resonator antenna based on slotting design of the utility model;

[0017] Figure 3 is a whole semi-transparent diagram of the 3D printed dielectric resonator antenna based on slotting design of the utility model;

[0018] Figure 4 is a top plane schematic diagram of the 3D printed dielectric resonator antenna based on slotting design of the utility model;

[0019] Figure 5 is a right plane schematic diagram of the 3D printed dielectric resonator antenna based on slotting design of the utility model;

[0020] Figure 6 is an S parameter simulation diagram of the dielectric resonator antenna without slotting of the utility model;

[0021] Figure 7 is an S parameter simulation diagram of the 3D printed dielectric resonator antenna based on slotting design of the utility model.

[0022] ILLUSTRATIVE DESCRIPTION

[0023] 1, antenna substrate; 2, front edge of substrate; 3, rectangular microstrip line; 4, rectangular slot; 5, dielectric resonator; 6, small rectangular slot; 7, large rectangular slot; 8, large cylindrical slot; 9, small cylindrical slot; 10, back edge of resonator. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present.

[0026] Embodiment

[0027] Please refer to Figures 1-7 As shown in the figure, the dielectric resonator antenna based on the slotted structure and capable of suppressing high-order modes comprises a metal ground plate, a dielectric substrate, a rectangular microstrip line 3, a rectangular slot 4 and a dielectric resonator 5. The metal ground plate is etched on the upper surface of the dielectric substrate, and the two together constitute an antenna substrate 1 in the shape of a cuboid. A rectangular slot 4 is also provided at the center of the antenna substrate 1. The dielectric resonator 5 is adhered to the center of the upper surface of the antenna substrate 1 by conductive adhesive, and a large cylindrical slot 8, a large rectangular slot 7, a small cylindrical slot 9 and a small rectangular slot 6 are provided on the dielectric resonator 5. The rectangular microstrip line 3 is etched on the lower surface of the antenna substrate 1. In the implementation, the large cylindrical slot 8, the large rectangular slot 7, the small cylindrical slot 9 and the small rectangular slot 6 are used to disturb the electric field distribution under the corresponding harmonic mode, thereby suppressing high-order modes.

[0028] Further, the large cylindrical slot 8 is four slots distributed at the four corners of the dielectric resonator 5. The large cylindrical slot 8 is in the shape of a quarter cylinder, and a small cylindrical slot 9 is provided through the side wall of each large cylindrical slot 8. The small cylindrical slot 9 is in the shape of a cylinder. The large rectangular slot 7 is two slots symmetrically distributed on the dielectric resonator 5, and the small rectangular slot 6 is also two slots symmetrically distributed on the dielectric resonator 5. The large rectangular slot 7 and the small rectangular slot 6 are both in the shape of a cuboid.

[0029] Further, the projection center of the dielectric resonator 5 on the antenna substrate 1 coincides with the center of the upper surface of the antenna substrate 1, and the resonator back edge 10 of the dielectric resonator 5 is parallel to both the substrate front edge 2 of the antenna substrate 1 and the long side of the rectangular slot 4; the projection of the rectangular microstrip line 3 on the antenna substrate 1 is vertically crossed with the rectangular slot 4 in a cross shape, and the intersection center coincides with the center of the lower surface of the antenna substrate 1. In implementation, the front end of the rectangular microstrip line 3 extends to the front edge of the antenna substrate 1 and is in contact with the lower surface of the antenna substrate 1, serving as the excitation port of the antenna. The radio frequency signal is input from the excitation port, conducted to the rectangular slot 4 through the rectangular microstrip line 3, and then conducted to the dielectric resonator 5 by the rectangular slot 4. By slotting at the position where the electric field of the high-order mode of the antenna is the strongest, the radiation of the high-order mode is suppressed, achieving the effect of suppressing the high-order mode.

[0030] Further, please refer to Figure 4 and Figure 5 , the dielectric resonator 5 is a 3D printed integrated structure. Through precise 3D printing technology, highly precise antenna components of size and shape can be manufactured, which is convenient to control, easy to process, and can be mass-produced to reduce costs. This significantly improves the manufacturing precision of the antenna and further enhances the performance stability of the antenna. Through the combination of slotting design and 3D printing technology, the antenna design is more flexible, and the structure and shape of the antenna can be freely adjusted and optimized according to actual needs, thereby realizing customized antenna design and meeting the needs of specific application scenarios.

[0031] Specifically, in implementation, the length L1 of the dielectric substrate is 150 mm, the width W1 is 150 mm, and the thickness H1 is 0.8 mm; the length L2 of the metal ground plate is 150 mm, and the width W2 is 150 mm; the narrow side W3 of the rectangular slot 4 is 1.2 mm, and the long side L3 is 11 mm; the length L4 of the rectangular microstrip line 3 is 84 mm, and the width W4 is 1.5 mm. Specifically, the length L p1 of the rectangular dielectric resonator 5 is 26.5 mm, the width W p1 is 29.3 mm, and the height H p1 is 10 mm; multiple slots are dug on the dielectric resonator 5, among which the radius R c1 of the small cylindrical slot 9 is 0.5 mm, and the height H c1 is 3 mm; the radius R c2 of the large cylindrical slot 8 is 8.54 mm, and the height H c2 is 6.5 mm; the length L p2 of the small rectangular slot 6 is 2 mm, the width W p2 is 2.7 mm, and the height H p2 is 6 mm; the length L p3 of the large rectangular slot 7 is 10 mm, the width Wp3 is 2.65mm, and the height H p3 is 5mm.

[0032] Further, the metal ground plate is made of copper, the dielectric substrate is made of FR4 (FR4 is made of glass fiber and epoxy resin), the dielectric constant is 4.4, and the loss tangent is 0.02; the dielectric constant of the dielectric resonator 5 is 30, and the loss tangent is 0.003; the narrow side of the rectangular slot 4 is 1.2mm, and the long side is 11mm; the rectangular microstrip line 3 is a copper-clad wire, and the characteristic impedance is 50Ω.

[0033] Referring to Figures 1-5 , by designing a slot on the dielectric resonator antenna to suppress high-order modes and using 3D printing technology for processing and manufacturing, the manufacturing precision of the antenna is significantly improved, the manufacturing cost of the antenna is reduced, and the production efficiency is improved. The S 11 simulation results are shown in Figures 6-7 , Figure 6 is the S parameter simulation diagram of the unslotted dielectric resonator antenna, Figure 7 is the S parameter simulation diagram of the 3D printed dielectric resonator antenna based on the slot of the present application, the unslotted dielectric resonator antenna Figure 6 has significant resonance peaks at 3GHz and 3.2GHz (S 11 reaches -13.5dB and -6dB respectively); while the 3D printed antenna of the present application with slot design Figure 7 has completely disappeared at the same frequency, indicating that by slotting to disturb the electric field distribution of high-order modes, the standing wave nodes of high-order modes are destroyed, and the suppression effect of high-order modes is achieved. Overall, by designing a slot on the dielectric resonator antenna, the high-order modes of the antenna can be significantly suppressed, the energy dispersion and loss caused by high-order modes can be reduced, more energy can be concentrated in the main mode for radiation, more input power can be converted into effective radiation, and thus the radiation efficiency and gain of the antenna can be improved, the signal strength and transmission distance can be improved, and the transmission quality and range of the signal can be enhanced.

[0034] It is to be noted that, in the present text, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0035] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A dielectric resonator antenna based on a slotted structure capable of suppressing high order modes, comprising a metal ground plate, a dielectric substrate, a rectangular microstrip line (3), a rectangular slot (4) and a dielectric resonator (5), characterized in that: The metal ground plate is etched on the upper surface of the dielectric substrate, and the two together constitute a cuboid-shaped antenna substrate (1), a rectangular slot (4) is also provided through the center of the antenna substrate (1); the dielectric resonator (5) is bonded to the center of the upper surface of the antenna substrate (1), and a large cylindrical groove (8), a large rectangular groove (7), a small cylindrical groove (9), and a small rectangular groove (6) are also provided on the dielectric resonator (5); the rectangular microstrip line (3) is etched on the lower surface of the antenna substrate (1).

2. The dielectric resonator antenna with suppressed high order modes based on a slotted structure according to claim 1, characterized in that: The large cylindrical groove (8) is four grooves distributed at the four corners of the dielectric resonator (5), and the large cylindrical groove (8) is in a quarter cylindrical structure, and each large cylindrical groove (8) has a small cylindrical groove (9) on the side wall, and the small cylindrical groove (9) is in a cylindrical structure; the large rectangular groove (7) is two grooves symmetrically distributed on the dielectric resonator (5), and the small rectangular groove (6) is two grooves symmetrically distributed on the dielectric resonator (5), and the large rectangular groove (7) and the small rectangular groove (6) are both in a cuboid structure.

3. The dielectric resonator antenna with suppressed high order modes based on a slotted structure according to claim 1, characterized in that: The projection center of the dielectric resonator (5) on the antenna substrate (1) coincides with the center of the upper surface of the antenna substrate (1), and the resonator back edge (10) of the dielectric resonator (5) is parallel to the substrate front edge (2) of the antenna substrate (1) and the long side of the rectangular slot (4); the projection of the rectangular microstrip line (3) on the antenna substrate (1) is perpendicular to the rectangular slot (4) in a cross shape, and the intersection center coincides with the center of the lower surface of the antenna substrate (1).

4. The dielectric resonator antenna with suppressed high order modes based on a slotted structure according to claim 1, characterized in that: The dielectric resonator (5) is a 3D printed integrated structure.

5. The dielectric resonator antenna with suppressed high order modes based on a slotted structure according to claim 1, characterized in that: The material of the metal ground plate is copper; the material of the dielectric substrate is FR4, the dielectric constant is 4.4, and the loss tangent value is 0.02; the dielectric constant of the dielectric resonator (5) is 30, and the loss tangent value is 0.003; the narrow side of the rectangular slot (4) is 1.2mm, and the long side is 11mm; the rectangular microstrip line (3) is a copper-clad wire, and the characteristic impedance is 50Ω.

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