CN110289490A - A circular three-dimensional dipole antenna array element applied to 5G millimeter wave - Google Patents

Abstract

The invention relates to a circular three-dimensional dipole antenna array element applied to 5G millimeter waves, comprising a dielectric substrate (1), a dipole radiation unit (2) located on the upper surface of the dielectric substrate, and a dipole radiation unit (2) located on the lower surface of the dielectric substrate. The ground plate and the feed point (3), the solder ball (4) under the ground plate and the feed point, and the metal through hole (5) connecting the radiation unit and the feed point; the radiation unit is composed of four center-symmetrical rectangular metals , there is an annular air gap between the ground plate and the feed point.

Description

A circular three-dimensional dipole antenna array element applied to 5G millimeter wave

technical field

The patent of the present invention relates to the technical field of microwave and millimeter wave communication, in particular to a circular three-dimensional dipole antenna array element applied to 5G millimeter wave.

Background technique

With the rapid development of wireless communication, spectrum resources are becoming more and more scarce. The development and use of millimeter-wave spectrum resources has become the focus of the fifth-generation mobile communication technology. 5G millimeter-wave mobile communication has the characteristics of wide channel capacity and fast data transmission speed. As one of the key components of 5G millimeter wave mobile communication, the antenna is required to be small in size and high in performance.

As the linear polarization direction of the receiving antenna deviates more and more from the linear polarization direction of the transmitting antenna, the induced signal becomes smaller; when the polarization direction of the receiving antenna deviates from the linear polarization of the transmitting antenna When the direction is orthogonal, the induced signal is zero. The linear polarization method has higher requirements on the direction of the antenna. The polarization direction of the antenna is often an important issue to consider.

For circular polarization, no matter what the polarization direction of the receiving antenna is, the induced signal is the same, and there will be no difference. Electromagnetic waves of arbitrary polarization can be received by circularly polarized antennas, and electromagnetic waves emitted by circularly polarized antennas can be received by antennas of arbitrary polarization. Therefore, the use of circular polarization reduces the sensitivity of the system to the orientation of the antenna.

In summary, the circularly polarized antenna is a commonly used antenna form. The circularly polarized antenna is beneficial to the reception of space electromagnetic waves, and can also suppress the interference of rain and fog reflection clutter.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a circular three-dimensional dipole antenna array element applied to 5G millimeter wave with small volume and simple structure. Technical scheme of the present invention is as follows:

A circular three-dimensional dipole antenna array element applied to 5G millimeter waves, including a dielectric substrate (1), a dipole radiation unit (2) located on the upper surface of the dielectric substrate, a ground plate located on the lower surface of the dielectric substrate, and The feed point (3), the ground plate and the solder ball (4) below the feed point, and the metal through hole (5) connecting the radiating unit and the feeding point; the radiating unit is composed of four centrally symmetrical rectangular metals. There is an annular air gap between the ground plate and the feed point.

Preferably, the radiating unit is composed of four center-symmetrical rectangular metals, and the size of each rectangular metal is 2.3mm*0.5mm. The annular air gap between the ground plate and the feed point, the slot size s of the air gap is 0.25mm, and there is no ground plane in the area between the feeds. The feed point is fed by four signals with the same amplitude and 90° phase difference.

The advantages of the present invention and existing inventions are:

1. The dipole antenna realizes a three-dimensional three-dimensional structure from a planar two-dimensional structure, which is convenient for integration;

2. The antenna array element is a single-layer structure, which is small in size and low in cost.

3. SMD structure makes the application more convenient;

4. The antenna element has excellent electrical performance parameters such as standing wave and gain in the millimeter wave frequency band.

5. The array elements of the antenna can be used alone or combined into an array, and its scalability is strong.

Description of drawings

FIG. 1 is a cross-sectional view of a circular three-dimensional dipole antenna array element applied to 5G millimeter waves according to the present invention;

Fig. 2 is a top view of a circular three-dimensional dipole antenna array element applied to 5G millimeter wave according to the present invention;

Fig. 3 is a bottom view of a circular three-dimensional dipole antenna array element applied to 5G millimeter wave according to the present invention;

Fig. 4 is the reflection coefficient of the antenna element of the present invention.

Fig. 5 is a phi=0° radiation pattern of the antenna array element of the present invention at 28 GHz.

Fig. 6 is a phi=90° radiation pattern of the antenna array element of the present invention at 28 GHz.

Fig. 7 is the axial ratio of the antenna element of the present invention at 28 GHz.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

As shown in Figures 1-3, the antenna array element of the present invention includes a dielectric substrate 1; a dipole radiation unit 2 positioned on the upper surface of the dielectric substrate; a ground plate and a feed point 3 positioned on the lower surface of the dielectric substrate; a ground plate and a feed point The solder ball 4 below; the metal via 5 connecting the radiation unit and the feed point.

The dielectric substrate is composed of a square dielectric substrate; the radiation unit is composed of four centrally symmetrical rectangular metals; the ground plate and the feed point are composed of metal on the lower surface of the substrate, and there is a gap between the ground plate and the feed point. Annular air gap.

The dielectric substrate 1 has a cubic structure, its surface shape is square, its length l1 is 6mm, its width w1 is 6mm, and its height h is 1.4mm; the substrate material is organic material, ceramic material, semiconductor material and is not limited to the above materials .

The circularized circularized three-dimensional dipole antenna array element is characterized in that: the radiation unit 2 is located on the upper surface of the dielectric substrate (1).

The radiation unit is composed of four centrally symmetrical rectangular metals; its size l2 is 2.3 mm, and its width w2 is 0.5 mm;

The ground plate and the feed point 3 are made of metal located on the lower surface of the dielectric substrate 1 . And there is an annular air gap between the ground plate and the feed point. The air gap slot size s is 0.25mm, and the area between the feeds has no ground plane.

The feed point is fed by four signals with the same amplitude and 90° phase difference.

The metal through hole penetrates the dielectric substrate 1 and connects the dipole radiation unit 2 and the ground plane. The feed point 3. The diameter D1 of the metal through hole is 0.2mm.

The solder balls 4 are located on the ground plane, the lower surface of the feed point 3 . The materials of the solder balls are lead-tin, copper, silver, gold and are not limited to the above materials. The diameter of the solder ball is 0.3mm.

Claims (4)

1. a kind of round stage three-dimensional doublet bay applied to 5G millimeter wave, including medium substrate (1), it is located at medium base The dipole radiating element (2) of plate upper surface, the earth plate positioned at medium substrate lower surface and feed point (3), earth plate and feed point The solder ball (4) of lower section and the metal throuth hole (5) for connecting radiating element and feed point；The radiating element is by four centers pair The rectangular metal of title is constituted.There are annular air gaps between the earth plate and feed point.

2. bay according to claim 1, which is characterized in that the radiating element is by four centrosymmetric rectangles Metal is constituted, and the size of each rectangular metal is 2.3mm*0.5mm.

3. bay according to claim 1, which is characterized in that the annular air gap between earth plate and feed point, Size s is slotted as 0.25mm in the air gap, and the no ground plane in region between feed.

4. bay according to claim 1, which is characterized in that the feed point is identical by amplitude, phase phase difference 90o's Four road signal feed-ins.