CN219350644U

CN219350644U - Broadband high-gain omnidirectional antenna

Info

Publication number: CN219350644U
Application number: CN202223208379.4U
Authority: CN
Inventors: 刘红波; 苏倩; 颜智峰
Original assignee: Shenzhen Pufang All Wisdom Of Seiko Technology Co ltd
Current assignee: Shenzhen Pufang All Wisdom Of Seiko Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-07-14
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a broadband high-gain omnidirectional antenna, which comprises a radiation unit, a power divider and a supporting structure, wherein the radiation unit is arranged on the antenna; the plurality of radiating units form a linear array and are distributed on the supporting structure, adjacent radiating units are distributed at 0 degrees and 180 degrees on the circumference, and the power divider is arranged between the two adjacent radiating units and is fixed on the supporting structure, so that an antenna main body is formed; the antenna main body is provided with a glass fiber reinforced plastic circular tube outer cover and is supported by a mounting base. The antenna of the utility model has the working frequency range 1710-2700MHz, meets the 4G5G frequency range, achieves the bandwidth of more than 45% relative to the bandwidth, and achieves the gain of 9-10.5db high gain.

Description

Broadband high-gain omnidirectional antenna

Technical Field

The utility model relates to the field of mobile communication systems, in particular to a broadband high-gain omnidirectional antenna.

Background

Mobile communication technology has entered the 5G age with the rapid development of countries. High-rate large bandwidth becomes a fundamental requirement for network coverage antennas. Base station antennas are classified into directional antennas and omni-directional antennas according to different coverage requirements. The directional antenna is suitable for a part of high data traffic area, and the omnidirectional antenna is suitable for a wide area. Of course, with the progress of urbanization, the population is continually moving and gathering, and the directional antenna needs are larger than the omnidirectional antenna. The omni-directional antenna is widely used in a wide area without special attention because of high economical efficiency, and achieves wide coverage. Whether a directional antenna or an omni-directional antenna, the antenna is required to support a wide frequency band in the current network demand, so that different frequency bands are supported, and the working bandwidth is wider and wider. The broadband technology of the omnidirectional antenna is limited by less requirements and self structural forms, the technical proposal is less, and the technical development is slower.

Most of the existing omni-directional antennas adopt a dipole series-feed design scheme. The antenna has narrow frequency band and the relative bandwidth can only meet about 10% -15% due to the limitation of the scheme. Only low gains can be made. In order to meet the current broadband requirement of the antenna, new design ideas and new design schemes are urgently needed.

Disclosure of Invention

The utility model aims to solve the technical problems of narrow frequency band and low gain of an omnidirectional antenna by providing a broadband high-gain omnidirectional antenna; the antenna works in the frequency range 1710-2700MHz, meets the 4G5G frequency range, achieves the bandwidth of more than 45% relative to the bandwidth, and achieves the gain of 9-10.5 db. The diameter size is small, the structure is simple, and the cost advantage is obvious.

The wideband high-gain omnidirectional antenna is realized by the following technical scheme: comprises a radiation unit, a power divider and a supporting structure;

the plurality of radiating units form a linear array and are distributed on the supporting structure, adjacent radiating units are distributed at 0 degrees and 180 degrees on the circumference, and the power divider is arranged between the two adjacent radiating units and is fixed on the supporting structure, so that an antenna main body is formed; the antenna main body is provided with a glass fiber reinforced plastic circular tube outer cover and is supported by the mounting base.

As a preferred technical solution, the radiating element is in the form of a dipole, which consists of a balun, a radiating arm and a fixing element; the plane of the radiating arm is bent towards the axis, so that the radiating unit is in circular conformation with the inner wall of the glass fiber reinforced plastic circular tube outer cover, the lower end of the radiating arm is provided with a balun in a U-shaped structure, and the two symmetrical radiating arms are welded and fixed by the balun; the inside of the radiation arm is provided with a fixing piece.

As a preferred technical solution, the radiating element and the power divider are fed in parallel via a network cable.

The beneficial effects of the utility model are as follows:

1. the antenna of the utility model has the working frequency range 1710-2700MHz, meets the 4G5G frequency range, achieves the bandwidth of more than 45% relative to the bandwidth, and achieves the gain of 9-10.5db high gain.

2. The utility model has the advantages of small diameter size, simple structure and obvious cost advantage,

drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of an antenna structure according to the present utility model;

FIG. 2 is a schematic diagram of a radiation unit structure according to the present utility model;

fig. 3 is a schematic diagram of a power divider according to the present utility model.

Detailed Description

All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.

As shown in fig. 1, the wideband high-gain omnidirectional antenna of the present utility model comprises a radiating element 1, a power divider 2 and a supporting structure 3;

a plurality of radiation units 1 form a linear array and are distributed on a supporting structure 3, and adjacent radiation units 1 are distributed at 0 degrees and 180 degrees on the circumference, so that the influence of cables on the out-of-roundness of a directional diagram is reduced, and the out-of-roundness index is improved; the power divider 2 is arranged between two adjacent radiating units 1 and fixed on the supporting structure 3 so as to form an antenna main body; the glass fiber reinforced plastic circular tube outer cover is arranged on the antenna main body and supported by the mounting base, so that the antenna main body is compact in structure and convenient to mount.

As shown in fig. 2, the radiating element 1 takes the form of a dipole, which consists of a balun 11, a radiating arm 12 and a fixed member 13; considering the antenna circular tube outer cover, in order to increase the unit impedance bandwidth through a wider size as much as possible, the plane of the radiating arm 12 is bent towards the axis, so that the radiating unit 1 is conformal with the inner wall circle of the glass fiber reinforced plastic circular tube outer cover, and the diameter size of the antenna is reduced; the lower end of the radiation arm 12 is provided with a balun 11 with a U-shaped structure, and the balun 11 is welded and fixed with two symmetrical radiation arms 12; the fixing piece 13 is arranged on the inner side of the radiation arms 12, and the space between the two symmetrical radiation arms 12 is ensured by the fixing piece 13; wherein the fixing piece 13 is fixed by plastic rivets; meanwhile, a fixing hole is designed on the plane of the balun 11; the antenna radiation unit 1 achieves a relative bandwidth of more than 45% and a unit gain of 2-2.5db.

As shown in fig. 3, the power divider 2 adopts a dielectric microstrip form, and the main feed end and the two ports are preferably equal in phase and amplitude, so that the efficiency is highest, and the microstrip transmission line is inverted-S-shaped, so that the size is reduced, and the connection of an antenna network line is facilitated.

In this embodiment, the radiating element 1 and the power divider 2 are fed in parallel via a network cable.

In the embodiment, the support structure 3 is preferably made of glass fiber reinforced plastic material, so as to meet the strength requirement; the distance between the linear array units is smaller than 1.1λ (high-frequency wavelength), and the gain requirement of the low frequency band is satisfied.

The electrical performance index that the antenna can realize is:

operating frequency: 1710-2700MHZ, gain of 10db, vertical polarization, roundness of less than 3db, standing wave of less than 1.5, side lobe suppression of more than 15db, horizontal plane lobe width of 360 degrees, vertical plane lobe width of 7 degrees, and power of 100W; the antenna has the mechanical performance, the size is 1000 mm diameter, the length is 32mm diameter, the glass fiber reinforced plastic housing is at the working temperature of-50 to 65, and the diameter of the mounting holding pole is phi 30 to phi 75.

The foregoing is merely illustrative of specific embodiments of the present utility model, and the scope of the utility model is not limited thereto, but any changes or substitutions that do not undergo the inventive effort should be construed as falling within the scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope defined by the claims.

Claims

1. The utility model provides a broadband high gain omnidirectional antenna which characterized in that: comprises a radiation unit (1), a power divider (2) and a supporting structure (3);

a plurality of radiation units (1) form a linear array and are distributed on a supporting structure (3), adjacent radiation units (1) are distributed at 0 degrees and 180 degrees on the circumference, and a power divider (2) is arranged between two adjacent radiation units (1) and is fixed on the supporting structure (3), so that an antenna main body is formed; the antenna main body is provided with a glass fiber reinforced plastic circular tube outer cover and is supported by a mounting base.

2. The wideband high gain omnidirectional antenna of claim 1, wherein: the radiation unit (1) adopts a dipole form and consists of a balun (11), a radiation arm (12) and a fixing piece (13); the plane of the radiating arm (12) is bent towards the axis, so that the radiating unit (1) is in circular conformal with the inner wall of the glass fiber reinforced plastic circular tube outer cover, a balun (11) with a U-shaped structure is arranged at the lower end of the radiating arm (12), and the two symmetrical radiating arms (12) are welded and fixed by the balun (11); a fixing piece (13) is arranged on the inner side of the radiation arm (12).

3. The wideband high gain omnidirectional antenna of claim 1, wherein: the radiating unit (1) and the power divider (2) are fed in parallel through a network cable.