CN113471705A

CN113471705A - Grounded metal column coupled dielectric resonator antenna

Info

Publication number: CN113471705A
Application number: CN202110845071.1A
Authority: CN
Inventors: 林娴静; 古庆光; 陈荣冰; 曾淼旺; 丁颜玉
Original assignee: Dongguan University of Technology
Current assignee: Dongguan University of Technology
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-10-01

Abstract

A grounding metal column coupled dielectric resonator antenna comprises a dielectric substrate, a microstrip feeder line, a metal ground plate, a via hole, a dielectric resonator and a metal U-shaped pipe, wherein the metal ground plate is positioned on the upper surface of the dielectric substrate, the dielectric resonator is positioned on the upper surface of the metal ground plate, the metal U-shaped pipe is positioned right in front of a square dielectric resonator, the via hole is formed by hollowing the square dielectric substrate, the microstrip feeder line is printed on the lower surface of the dielectric substrate, and the metal U-shaped pipe is connected with the microstrip feeder line through the via hole. The invention has the beneficial effects that: the first microstrip feeder line connected with the metal U-shaped pipe feeds electricity to the metal U-shaped pipe, so that the metal U-shaped pipe is coupled with the dielectric resonator to generate a resonator antenna with three resonant frequency points; secondly, three resonance frequency points are generated by adjusting the height and the length of the square dielectric resonator and the length of the metal U-shaped tube; thirdly, the structure is simple and has wider bandwidth.

Description

Grounded metal column coupled dielectric resonator antenna

Technical Field

The invention belongs to the technical field of wireless communication, and particularly relates to a grounded metal column coupled dielectric resonator antenna.

Background

With the rapid development of wireless communication services, higher demands have been made on the performance of antennas, such as miniaturization, wide frequency band, and low loss. Although various microstrip antennas have been extensively studied and widely used due to their advantages of low profile, light weight, etc., their development and application are limited due to the existence of two key technical bottlenecks, i.e., high ohmic loss of metal in the high frequency band and large geometric size of the antenna in the low frequency band. In recent years, a dielectric resonator antenna, which is a new type of antenna, has received extensive attention and research due to its good performance. A dielectric resonator antenna is a resonant antenna, which is made of a low-loss microwave dielectric material, and its resonant frequency is determined by the size, shape and relative permittivity of the resonator.

At present, microstrip antennas and dielectric resonator antennas are widely used in modern wireless communication systems as two types of typical antennas. Compared with the two-dimensional structure of the microstrip antenna, the three-dimensional structure of the dielectric resonator antenna has higher design freedom, and the size and bandwidth thereof can be controlled by the dielectric constant of the dielectric material in a wide range. Further, the dielectric resonator antenna is mainly composed of a low-loss dielectric, and has almost no surface wave and conductor loss, so that its radiation efficiency does not decrease with an increase in frequency.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a dielectric resonator antenna coupled by a grounding metal column, which has a simple structure and a wider bandwidth.

In order to achieve the purpose, the invention provides the following technical scheme: a grounding metal column coupled dielectric resonator antenna comprises a dielectric substrate, a microstrip feeder line, a metal ground plate, a via hole, a dielectric resonator and a metal U-shaped pipe, wherein the metal ground plate is positioned on the upper surface of the dielectric substrate, the dielectric resonator is positioned on the upper surface of the metal ground plate, the metal U-shaped pipe is positioned right in front of a square dielectric resonator, the via hole is formed by hollowing the square dielectric substrate, the microstrip feeder line is printed on the lower surface of the dielectric substrate, and the metal U-shaped pipe is connected with the microstrip feeder line through the via hole.

Furthermore, the metal U-shaped pipe is located right in front of the square dielectric resonator and is offset towards the X-axis direction.

Furthermore, the metal U-shaped pipe is composed of two metal columns which are symmetrical about an X axis, one metal column of the metal U-shaped pipe is connected with the upper surface of the metal grounding plate, and the other metal column of the metal U-shaped pipe is connected with the microstrip feed line printed on the lower surface of the medium substrate through a through hole.

Further, the length of the metal U-shaped pipe is adjustable.

Furthermore, the dielectric resonator is positioned at the center of the upper surface of the dielectric substrate, and the distances from the dielectric resonator to the sides of the dielectric substrate are equal.

Furthermore, the microstrip feed line is formed by combining three sections of microstrip feed lines, and the length and the width of the three sections of microstrip feed lines are adjustable.

Further, the dielectric substrate is a square dielectric substrate.

Further, the dielectric resonator is a square dielectric resonator.

Further, the height and the length of the dielectric resonator are adjustable.

The invention has the beneficial effects that:

the first microstrip feeder line connected with the metal U-shaped pipe feeds electricity to the metal U-shaped pipe, so that the metal U-shaped pipe is coupled with the dielectric resonator to generate a resonator antenna with three resonant frequency points;

secondly, three resonance frequency points are generated by adjusting the height and the length of the square dielectric resonator and the length of the metal U-shaped tube;

thirdly, the structure is simple and has wider bandwidth.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present embodiment;

FIG. 2 is a schematic diagram of the overall and detailed structure of the present embodiment;

fig. 3 is a front view of the antenna of the present embodiment;

fig. 4 is a side view of the antenna of the present embodiment;

fig. 5 is a top view of the antenna of the present embodiment;

fig. 6 is a bottom view of the antenna of the present embodiment;

FIG. 7 is a top dimension diagram of the antenna of the present embodiment;

fig. 8 is a front dimension labeled diagram of the antenna of the present embodiment;

fig. 9 is a simulated S-parameter graph of the dielectric resonator antenna with three resonance frequency points according to the present embodiment.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As an embodiment of the present invention, the embodiment of the present invention is a grounded metal post-coupled dielectric resonator antenna, which includes a square dielectric substrate 1, a microstrip feed line (the microstrip feed line is divided into three

microstrip feed lines

5, 6, and 9 with different widths), a metal ground plate 7, a square dielectric resonator 2, a metal U-shaped tube composed of two

metal posts

3 and 4, and a via hole 8.

One end of a microstrip feeder line 5 of the single-port excited dielectric resonator antenna with three resonance frequency points is connected with a port, and the other end feeds a metal column 4.

The dielectric resonator antenna coupled by the grounding metal column comprises a dielectric substrate 1, a metal grounding plate 7 attached to the upper surface of the dielectric substrate 1, a dielectric resonator 2 above the metal grounding plate and a metal U-shaped tube 4. The microstrip feed line 5 printed on the lower surface of the medium substrate 1 is connected with a port, and the other end feeds the metal U-shaped pipe 4. The height and the length of the square dielectric resonator 2 and the length of the metal U-shaped pipe 4 are reasonably selected to enable the dielectric resonator antenna to have three resonance frequency points. As an example, when the required resonance frequency point is f₁＝5.44GHz,f₂＝5.64GHz,f₃＝5.83In GHz, a dielectric plate with a relative dielectric constant of 3.55, a thickness h of 0.508mm, and a length and a width of 40mm may be used as the substrate, a dielectric plate with a relative dielectric constant of 37.4, a height h of 4.1mm, and a length and a width of 10.9mm may be used as the square dielectric resonator 2, the radius R of the left metal pillar 3 of the metal U-shaped tube is 1.45mm, the height h of 6.6mm, the radius R of the right metal pillar 4 of 1.45mm, and the height h of 7.108mm, a via hole 8 is formed by hollowing out the dielectric substrate, the radius R of 1.7mm, the length of the microstrip line 5 is 9mm, the width of 1.48mm, the length of the microstrip line 6 is 2.5mm, the width of 2.4mm, the length of the microstrip line 9 is 3.4mm, and the width of 2.2 mm.

Fig. 4, 5 and 6 are side, top and bottom views of a dielectric resonator antenna, respectively, and fig. 7 and 8 are dimension drawings of each part of the dielectric resonator antenna.

With reference to the dimensioning labels of fig. 2, 7, and 8, the specific parameters of the antenna in this embodiment are as follows: the thickness c of the dielectric plate is 0.508mm, the width b is 40mm, and the length a is 40 mm. The square dielectric resonator has a height 1c of 4.1mm, a width 1b of 10.9mm, and a length 1a of 10.9 mm. The metal column 3 has a diameter 2a of 2.9mm and a height 2c of 6.6 mm. The metal column 4 has a diameter 2a of 2.9mm and a height 3c of 7.108 mm. The width 5a and length 5b of the microstrip feed line 5 are 1.48mm and 9mm, respectively, and the distance 7a from the edge of the dielectric plate is 17.96 mm. The width 6a and length 6b of the microstrip feed line 6 are 2.4mm, 2.5mm, respectively. The width 9a and length 9b of the microstrip feed line 9 are 2.2mm, 3.4mm, respectively. The diameter 3a of the cutout 8 is 3.4mm and the height c is 0.508 mm. The square dielectric resonator 2 is spaced 14.55mm from the edge of the dielectric plate by a distance 4 a.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A grounded metal post coupled dielectric resonator antenna, comprising: the metal grounding plate is positioned on the upper surface of the medium substrate, the medium resonator is positioned on the upper surface of the metal grounding plate, the metal U-shaped tube is positioned right in front of the square medium resonator, the via hole is formed by hollowing the square medium substrate, the microstrip feed line is printed on the lower surface of the medium substrate, and the metal U-shaped tube is connected with the microstrip feed line through the via hole.

2. The grounded-metal-post-coupled dielectric resonator antenna of claim 1, wherein: the metal U-shaped pipe is located right in front of the square dielectric resonator and deviates towards the X-axis direction.

3. The grounded-metal-post-coupled dielectric resonator antenna of claim 2, wherein: the metal U-shaped pipe is composed of two metal columns and is symmetrical about an X axis, one metal column of one side of the metal U-shaped pipe is connected with the upper surface of the metal grounding plate, and the other metal column of the metal U-shaped pipe is connected with the microstrip feeder line printed on the lower surface of the medium substrate through the through hole.

4. The grounded-metal-post-coupled dielectric resonator antenna of claim 1, wherein: the length of the metal U-shaped pipe is adjustable.

5. The grounded-metal-post-coupled dielectric resonator antenna of claim 1, wherein: the dielectric resonator is positioned at the center of the upper surface of the dielectric substrate, and the distances from the dielectric resonator to the sides of the dielectric substrate are equal.

6. The grounded-metal-post-coupled dielectric resonator antenna of claim 1, wherein: the microstrip feed line is formed by combining three sections of microstrip feed lines, and the length and the width of the three sections of microstrip feed lines are adjustable.

7. The grounded-metal-post-coupled dielectric resonator antenna of claim 1, wherein: the dielectric substrate is a square dielectric substrate.

8. The grounded-metal-post-coupled dielectric resonator antenna of claim 1, wherein: the dielectric resonator is a square dielectric resonator.

9. A grounded metal post coupled dielectric resonator antenna as claimed in claim 1 or 8, wherein: the height and the length of the dielectric resonator are adjustable.