WO2018001007A1 - Dense array antenna for use in 5g system - Google Patents

Abstract

The present invention relates to a dense array antenna for use in a 5G system. By means of composing one antenna having 3D beamforming capabilities with a radial dipole part, a calibration network, and a T/R component part, multi-directional beamforming can be implemented, and radio communication system capacity can be significantly increased so as to achieve optimal system performance, thus aiding an operator in utilizing existing sites and spectrum resources to the maximum extent, and ensuring excellent performance of mobile communication.

Description

A dense array antenna for 5G systems Technical field

The present invention relates to an apparatus for use in the field of mobile communications, and more particularly to a dense array antenna for a 5G mobile communication system.

Background technique

With the continuous development of China's mobile communication industry, research on the fifth generation mobile communication system (5G) has begun. 5G mobile communication systems require greater communication capacity and higher wireless spectrum efficiency. The requirements for base station antennas need to support 3D beamforming and more powerful MIMO functions.

For improving the mobile communication capacity, the conventional method is a base station multi-port antenna using polarization diversity technology, which can reduce multipath fading to improve link stability, and multi-port MIMO technology can further improve mobile communication capacity. However, in the era of 5G communication, technical requirements such as big data traffic, high rate, and low latency have become the norm. Traditional dual-polarized multi-port base station antennas have been unable to meet the requirements of technological evolution.

As one of the most important core technologies of 5G mobile communication, dense array MIMO antenna can multiply the efficiency of spectrum resources and form dynamic and targeted network coverage. At the same time, the 5G dense array antenna has 3D beamforming capability, enabling deep coverage at both latitudes of horizontal and vertical, thus greatly improving system capacity and wireless spectrum efficiency.

Summary of the invention

In view of this, the main object of the present invention is to provide a dense array antenna for a 5G system, which has a 3D beamforming capability, thereby realizing multi-directional beamforming, which can greatly improve mobile communication capacity and achieve optimal system performance. To help operators maximize the use of existing sites and spectrum resources.

To achieve the above objective, the present invention provides a dense array antenna for a 5G system, and the specific technical solutions are as follows:

A dense array antenna for a 5G system, comprising a radome (1), a radiating oscillator portion (2), a reflecting plate (3), a coupled calibration network (4), and a T/R component portion (5); a radiating oscillator portion (2) The coupled calibration network (4) is disposed on the reflector (3), the T/R component part (5) and the coupled calibration network a network (4) connection, a radiating oscillator portion (2), a reflector (3) and a coupled calibration network (4) are included by the radome (1); the coupled calibration network (4) includes a calibration port (8), power distribution And the coupling unit (9), the microstrip line (10); the calibration port (8) is respectively connected to each power distribution and coupling unit (9) through the microstrip line (10); the amplitude of the microstrip line (10) and the like The power distribution is coupled to the energy of the coupling unit (9) to the calibration port (8).

The power distribution and coupling unit (9) includes +45° port 1 (11.1), +45° port 2 (11.2), -45° port 1 (12.1), -45° port 2 (12.2), and patch load. 1 (13.1), patch load 2 (13.2), T/R port 1 (14.1), T/R port 2 (14.2), calibration sub-port (15);

T/R port 1 (14.1) is connected to +45° port 1 (11.1) and +45° port 2 (11.2) by equal-amplitude equal phase power distribution units;

T/R port 2 (14.2) is connected to -45° port 1 (12.1) and -45° port 2 (12.2) by equal-amplitude equal phase power distribution units;

After the calibration sub-port (15) is phase-equalized by amplitude, it is matched with patch load 1 (13.1) and patch load 2 (13.2) at its end;

The coupling degree between the calibration sub-port (15) and T/R port 1 (14.1) and T/R port 2 (14.2) is the same;

The calibration subport (15) is in an isophase relationship with T/R Port 1 (14.1) and T/R Port 2 (14.2).

An isolation side strip for achieving an isolation index between different vibrator units and avoiding signal interference is disposed between each of the vibrator units (7) of the radiating element portion (2); two adjacent vibrator units in each column longitudinal direction (7) Combining into a whole, the connection of two adjacent transducer units (7) in the longitudinal direction of each column is realized by the power distribution and coupling unit (9).

Each of the vibrator units (7) of the radiating oscillator portion (2) is arranged with a misaligned half-vibrator spacing; the number of vibrator units (7) of the radiating vibrator portion (2) is 32×n, and n is a positive integer. .

The radome (1) is in the form of a fully enclosed and a semi-closed form.

The longitudinal spacing of the vibrators of the radiating element portion (2) is 0.6 to 1 wavelength corresponding to the center frequency.

The transverse spacing of the vibrators of the radiating element portion (2) is 1/2 wavelength corresponding to the center frequency.

The vibrator unit (7) of the radiating element portion (2) is a dual polarized unit having +45° and -45°.

Compared with the prior art, the present invention adopts dense array technology instead of ordinary single array antenna technology, has 3D beam shaping capability, can realize multi-directional beamforming, multiply spectrum resource efficiency, and greatly improve mobile communication. Capacity to achieve optimal system performance.

DRAWINGS

1 is an overall structural diagram of a dense array antenna for a 5G system;

2 is a partial structural view of a radiating oscillator of a dense array antenna for a 5G system;

3 is an overall composition diagram of a coupled calibration network for a dense array antenna of a 5G system;

4 is an implementation detail of a power distribution and coupling calibration unit for a dense array antenna of a 5G system.

1, radome

2. Radiated oscillator part

3, the reflector

4. Coupling calibration network

5, T / R component part

6.1, isolation side strip 1

6.2, isolation side strip 2

6.3, isolation side strip 3

6.4, isolation side strip 4

6.5, isolation side strip 5

6.6, isolation side strip 6

6.7, isolation side strip 7

7, the vibrator unit

8, calibration port

9, power distribution and coupling unit

10, microstrip line

11.1, +45° port 1

11.2, +45 ° port 2

12.1, -45° port 1

12.2, -45 ° port 2

13.1, 50Ω patch load 1

13.2, 50Ω patch load 2

14.1, T/R port 1

14.2, T/R port 2

15, calibration subport

detailed description

As shown in FIG. 1, the present invention is composed of a radome (1), a radiating oscillator portion (2), a reflecting plate (3), a coupled calibration network (4), and a T/R component portion (5), and a radiating oscillator portion (2). ) is disposed on the front side of the reflector (3), the coupled calibration network (4) is disposed on the back of the reflector (3), and the T/R component portion (5) is coupled to the coupled calibration network (4), and the radiating oscillator portion (2) a reflector (3) and a coupled calibration network (4) are included by the radome (1); the coupled calibration network (4) includes a calibration port (8), a power point The coupling unit (9) and the microstrip line (10) are arranged; the calibration port (8) is respectively connected to each power distribution and coupling unit (9) through the microstrip line (10); the amplitude of the microstrip line (10), etc. The phase distributes the power distribution to the energy of the coupling unit (9) to the calibration port (8). By designing the electrical characteristics of the coupled calibration network, precise control of the amplitude phase of each pair of vibrators is achieved, thereby implementing a dense array antenna for 5G systems.

The invention will now be described in greater detail with reference to the drawings and examples.

The present invention proposes a dense array antenna for a 5G mobile communication system, wherein FIG. 1 is an overall structure diagram of a dense array antenna, FIG. 2 is a structural diagram of a radiated oscillator part of a dense array antenna, and FIG. 3 is an overall composition of a coupled calibration network of a dense array antenna. Figure 4 is a detailed implementation of the power distribution and coupling calibration unit of the dense array antenna.

In the preferred embodiment, the longitudinal spacing of the vibrators of the radiating element portion (2) is 0.6 to 1 wavelength (i.e., 0.6 to 1 λ) corresponding to the center frequency.

In the preferred embodiment, the transverse spacing of the vibrators of the radiating element portion (2) is 1/2 wavelength (i.e., 1/2 λ) corresponding to the center frequency.

In the preferred embodiment, the vibrators of the radiating element portion (2) are arranged with a misaligned half-vibrator spacing between each column.

As shown in FIG. 2, in the preferred embodiment, the vibrator of the radiating element portion (2) is provided with an insulating side strip 1 (6.1), an isolated side strip 2 (6.2), and an isolated side strip 3 (6.3). The isolation side strip 4 (6.4), the isolation side strip 5 (6.5), the isolation side strip 6 (6.6), and the isolation side strip 7 (6.7) are used to realize the isolation index between different vibrator units to avoid signal interference.

As shown in FIG. 3, in the preferred embodiment, the coupled calibration network (4) consists of a calibration port (8), a power distribution and coupling unit (9), and a microstrip line (10).

In the preferred embodiment, the two transducer units (7) in each column are combined into one unit, and the connection is achieved by the power distribution and the coupling unit (9). The entire antenna has 32 pairs of such vibrator units (7).

In the preferred embodiment, the coupled calibration network (4) is implemented by the microstrip line (10) to couple the power distribution with the energy of the coupling unit (9) to the calibration port (8).

As shown in Figure 4, the power distribution and coupling unit (9) includes +45° port 1 (11.1), +45° port 2 (11.2), -45° port 1 (12.1), and -45° port 2 (12.2). 50Ω chip load 1 (13.1), 50Ω chip load 2 (13.2), T/R port 1 (14.1), T/R port 2 (14.2), calibration sub-port (15).

In the preferred embodiment, in the power distribution and coupling unit (9), the T/R port 1 (14.1) passes the equal-amplitude phase power distribution unit and the +45° port 1 (11.1), +45° port 2, respectively. (11.2) Connected.

In the preferred embodiment, in the power distribution and coupling unit (9), the T/R port 2 (14.2) passes through equal-amplitude equal-phase power distribution units and -45° port 1 (12.1), -45° port 2, respectively. (12.2) Connected.

In the preferred embodiment, in the power distribution and coupling unit (9), the calibration sub-port (15) is phase-equalized by amplitude, and is matched at its end with a 50 Ω patch load 1 (13.1) and a 50 Ω patch load 2, respectively. (13.2).

In the preferred embodiment, the coupling between the calibration sub-port (15) and the T/R port 1 (14.1) and the T/R port 2 (14.2) in the power distribution and coupling unit (9) is 16 dB ± 0.2. dB.

In the preferred embodiment, the power distribution and coupling unit (9) has an equal phase relationship between the calibration subport (15) and the T/R port 1 (14.1) and the T/R port 2 (14.2).

Through such a design, the control of the amplitude and phase of each vibrator unit is achieved by calibrating the port (8), and the 3D beamforming capability can be achieved by giving different unit combination modes and amplitude phase excitation. Multi-directional beamforming doubles the efficiency of spectrum resources and greatly increases the capacity of wireless communication systems to achieve optimal system performance.

The embodiments described above are merely illustrative of a certain embodiment of the present invention, and the description thereof is more specific and detailed, and it will be understood by those skilled in the art after reading this specification, without departing from the inventive concept. A number of variations and modifications can be made which fall within the scope of the invention.

Claims (7)

A dense array antenna for a 5G system, comprising: a radome (1), a radiating oscillator portion (2), a reflecting plate (3), a coupled calibration network (4), and a T/R component portion (5) The radiating oscillator portion (2), the coupled calibration network (4) are disposed on the reflecting plate (3), the T/R component portion (5) is coupled to the coupled calibration network (4), the radiating oscillator portion (2), and the reflecting plate ( 3) and the coupled calibration network (4) is included by the radome (1); the coupled calibration network (4) includes a calibration port (8), a power distribution and coupling unit (9), a microstrip line (10); a calibration port (8) respectively connected to each power distribution and coupling unit (9) through the microstrip line (10); the power distribution of the microstrip line (10) and the equal phase and the energy of the coupling unit (9) are coupled to the calibration port. (8). A dense array antenna for a 5G system according to claim 1, wherein said power distribution and coupling unit (9) comprises +45° port 1 (11.1) and +45° port 2 (11.2) , -45° Port 1 (12.1), -45° Port 2 (12.2), Chip Load 1 (13.1), Chip Load 2 (13.2), T/R Port 1 (14.1), T/R Port 2 ( 14.2), calibration sub-port (15); T/R port 1 (14.1) is connected to +45° port 1 (11.1) and +45° port 2 (11.2) by equal-amplitude equal phase power distribution units; T/R port 2 (14.2) is connected to -45° port 1 (12.1) and -45° port 2 (12.2) by equal-amplitude equal phase power distribution units; After the calibration sub-port (15) is phase-equalized by amplitude, it is matched with patch load 1 (13.1) and patch load 2 (13.2) at its end; The coupling degree between the calibration sub-port (15) and T/R port 1 (14.1) and T/R port 2 (14.2) is the same; The calibration subport (15) is in an isophase relationship with T/R Port 1 (14.1) and T/R Port 2 (14.2). A dense array antenna for a 5G system according to claim 2, characterized in that: between each of the vibrator units (7) of the radiating element portion (2) is provided for realizing between different vibrator units Isolation index, isolated side strips to avoid signal interference; two adjacent vibrator units in each column (7) Combined into a single unit, the connection of two adjacent transducer units (7) in the longitudinal direction of each column is achieved by means of a power distribution and coupling unit (9). A dense array antenna for a 5G system according to claim 3, characterized in that: each of the vibrator units (7) of the radiating element portion (2) is arranged with a misaligned half-vibrator spacing; a radiating vibrator The number of the vibrator unit (7) of the part (2) is 32 × n, and n is a positive integer. A dense array antenna for a 5G system according to any one of claims 1 to 4, characterized in that the radome (1) is in the form of a fully enclosed and a semi-closed form. A dense array antenna for a 5G system according to any one of claims 1 to 4, characterized in that the longitudinal spacing of the vibrators of the radiating element portion (2) is 0.6 to 1 wavelength corresponding to the center frequency. . A dense array antenna for a 5G system according to any one of claims 1 to 4, characterized in that the transverse spacing of the vibrators of the radiating element portion (2) is 1/2 wavelength corresponding to the center frequency.

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