CN217507654U

CN217507654U - Ultra-wideband 3.5G 4T4R base station antenna

Info

Publication number: CN217507654U
Application number: CN202220861514.6U
Authority: CN
Inventors: 丁勇; 王长江; 刘义成
Original assignee: Techwave Communications Inc
Current assignee: Techwave Communications Inc
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2022-09-27
Anticipated expiration: 2032-04-14

Abstract

The utility model belongs to the technical field of the base station antenna technique and specifically relates to an ultra wide band 3.5G 4T 4R's base station antenna, adopt vertical direction fixed connection's three layer construction, reflecting plate including the bottom, the high frequency radiation array of intermediate level and the dielectric plate of top layer, high frequency radiation array includes a plurality of radiating element, it has a plurality of slots to open on the dielectric plate, a plurality of radiating element arrange along the length direction of reflecting plate equidistant, radiating element is arranged in directly over to the dielectric plate, the slot is arranged in between the adjacent radiating element in the slot, the slot is that L is 0.6 lambda, W is the fretwork groove of 0.17 lambda, be equipped with a plurality of insulated columns on the reflecting plate, radiating element top is arranged in through the insulated column to the dielectric plate. The base station antenna improves the cross polarization ratio by +/-60 through the dielectric plate with the slot holes, also improves the isolation of the whole machine in circuit parameters, reduces the standing-wave ratio of the whole machine, reduces the index difficulty coefficient of a product and optimizes the product quality.

Description

Ultra-wideband 3.5G 4T4R base station antenna

Technical Field

The utility model belongs to the technical field of the base station antenna technique and specifically relates to an ultra wide band 3.5G 4T 4R's base station antenna.

Background

With the rapid development of mobile communication technology, a new 5G communication technology is also applied to daily life. The 5G communication can meet the requirement of larger data capacity and ensure higher data constant efficiency, and three operators in China often adopt 3.5G frequency band (3300 MHz-3700 MHz) multi-array MIMO antennas to construct a large-capacity and high-efficiency information network in the communication data transmission process. Foreign operators, especially North American operators, have far failed to meet the domestic 3.5G frequency band, and the foreign 3.5G frequency band (3200 MHz-4200 MHz) has become a trend. The overseas 3.5G frequency band is wider, the difficulty coefficient of the performance of the product is increased, and indexes hardly meet the requirements in a full index mode regardless of circuit parameters or radiation parameters, so that how to further ensure the performance of the antenna on the basis of widening the frequency band also becomes an important research direction of an antenna designer.

SUMMERY OF THE UTILITY MODEL

In order to solve current 3.5G frequency channel broad, lead to the problem that indexes such as circuit parameter and radiation parameter hardly satisfy the requirement, the utility model provides an ultra wide band 3.5G 4T 4R's base station antenna uses the FR4 dielectric plate that has the fretwork groove, reduces the standing-wave ratio in the complete machine performance, improves the complete machine isolation, improves cross polarization ratio 60.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an ultra wide band 3.5G 4T 4R's base station antenna, adopt the three layer construction of vertical direction fixed connection, reflecting plate including the bottom, the high frequency radiation array of intermediate level and the dielectric plate of top layer, high frequency radiation array includes a plurality of radiating element, it has a plurality of slots to open on the dielectric plate, a plurality of radiating element are arranged along the length direction of reflecting plate equidistant, the dielectric plate is arranged in directly over the radiating element, the slot is arranged in between the adjacent radiating element, use the dielectric plate that has fretwork slot, reduce the standing-wave ratio in the complete machine performance, improve the complete machine isolation, improve cross polarization ratio 60.

In some embodiments, the slot hole is a hollowed-out slot with L of 0.6 λ and W of 0.17 λ, such that the slot hole is located between every two radiation units in the longitudinal direction.

In some embodiments, the reflector plate is provided with a plurality of isolation pillars, the dielectric plate is disposed above the radiation units through the isolation pillars, so that a certain distance is formed between the dielectric plate and the radiation units, and the distance d1 between the dielectric plate and the radiation units is 0.09-0.15 lambda.

In some embodiments, the high-frequency radiating array comprises a first radiating array and a second radiating array, the first radiating array and the second radiating array are arranged side by side, and the distance d2 between the first radiating array and the second radiating array is 0.7-0.85 lambda.

In some embodiments, the distance d3 between adjacent radiating elements is 0.7-0.85 lambda.

The d1, d2 and d3 can effectively ensure that the radiation array has good inhibition in the working frequency range of 3.2 GHz-4.2 GHz.

In some embodiments, an isolation boundary one is provided between the first radiating array and the second radiating array for reducing interference.

In some embodiments, two sides of the reflection plate are provided with second isolation boundaries arranged along the arrangement direction of the radiation units.

The first isolation boundary and the second isolation boundary can reduce interference between the two arrays and reduce boundary effect and coupling effect between systems.

In some embodiments, the radiating unit is a PCB square oscillator, the working frequency band of the radiating unit is 3.2 GHz-4.2 GHz, green oil is adopted for oscillator surface treatment, and compared with a traditional die-casting oscillator, the radiating unit has the advantages of small volume, light weight, easiness and flexibility in installation, low cost and the like.

In some embodiments, the dielectric plate is FR4 dielectric plate, and the dielectric constant Er is 4.4, so as to enhance the performance of the electromagnetic wave emitted by the base station antenna.

The utility model has the advantages that,

(1) the utility model provides an ultra wide band 3.5G 4T 4R's base station antenna, through the dielectric plate who opens the slot hole, improve cross polarization ratio 60, in the circuit parameter, also improved complete machine isolation, reduced complete machine standing wave ratio, reduced product index difficulty coefficient, optimized product quality;

(2) the utility model provides an ultra wide band 3.5G 4T 4R's base station antenna, through using the dielectric-slab that has certain distance with the radiating element, and adopt FR4 dielectric-slab, can make the electromagnetic wave of antenna get into FR4 dielectric-slab after the wavelength change to eliminate the influence of antenna house to the electromagnetic wave wavelength, thereby make the base station antenna have excellent sending and receiving efficiency;

(3) the utility model provides an ultra wide band 3.5G 4T 4R's base station antenna through setting up the isolation border on the expelling plate, reduces the interference between the radiation array, boundary effect and coupling effect between the reducing system.

Drawings

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

FIG. 1 is an exploded view of a base station antenna;

FIG. 2 is an assembled view of a base station antenna;

FIG. 3 is a front view of a base station antenna;

FIG. 4 is a side view of a base station antenna;

FIG. 5 is a graph of a standing wave isolation waveform without the addition of FR4 dielectric slab;

FIG. 6 is a waveform diagram of the cross-polarization ratio of + -60 deg. for a dielectric board without FR4 added;

FIG. 7 is a waveform diagram of standing wave isolation with added FR4 dielectric board;

FIG. 8 is a waveform diagram of increasing the cross-polarization ratio of a FR4 dielectric slab by 60 deg.;

in the figure, 1, a reflecting plate, 2, a high-frequency radiating array, 21, a radiating unit, 22, a first radiating array, 23, a second radiating array, 3, a dielectric plate, 4, a slot hole, 5, an isolation column, 6, an isolation boundary I and 7, an isolation boundary II are shown.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

As shown in fig. 1 to 4, in order to optimize indexes such as a cross polarization ratio of ± 60 ° in a 3.5G wider frequency band, improve the isolation of the whole device, and reduce a standing-wave ratio, a base station antenna of an ultra-wideband 3.5G 4T4R is designed, which adopts a three-layer structure fixedly connected in a vertical direction, and includes a reflecting plate 1 at a bottom layer, a high-frequency radiation array 2 at a middle layer, and a dielectric plate 3 at a top layer, wherein the high-frequency radiation array 2 includes a plurality of radiation units 21, a plurality of slots 4 are formed in the dielectric plate 3, the plurality of radiation units 21 are arranged at equal intervals along the length direction of the reflecting plate 1, the dielectric plate 3 is disposed right above the radiation units 21, and the slots 4 are disposed between adjacent radiation units 21.

The slot hole 4 is a hollow-out slot with L of 0.6 lambda and W of 0.17 lambda.

The reflecting plate 1 is provided with a plurality of isolation columns 5, the dielectric plate 3 is arranged above the radiation unit 21 through the isolation columns 5, and the distance d1 between the dielectric plate 3 and the radiation unit 21 is 0.09-0.15 lambda.

The high-frequency radiation array 2 comprises a first radiation array 22 and a second radiation array 23, the first radiation array 22 and the second radiation array 23 are arranged side by side, and the distance d2 between the first radiation array 22 and the second radiation array 23 is 0.7-0.85 lambda.

The distance d3 between adjacent radiating elements 21 is 0.7-0.85 lambda.

The d1, d2 and d3 can effectively ensure that the radiation array has good inhibition in a working frequency band of 3.2 GHz-4.2 GHz, wherein lambda is the central frequency wavelength of the working frequency band, and the central frequency point is 3700 MHz.

In order to reduce interference, a first isolation boundary 6 is arranged between the first radiation array 22 and the second radiation array 23, and two isolation boundaries 7 arranged along the arrangement direction of the radiation units 21 are arranged on two sides of the reflecting plate 1. The first isolation boundary 6 and the second isolation boundary 7 are arranged to reduce interference between the two arrays and also reduce boundary effects and coupling effects between systems.

Each row of the radiation arrays of the high-frequency radiation array 2 is formed by 5-14 radiation units 21, the radiation units 21 are PCB square oscillators, green oil treatment is adopted for surface treatment, the specific number of the oscillators depends on the gain requirement of a high-frequency section antenna of the whole antenna, and compared with a traditional die-casting oscillator, the high-frequency section antenna has the advantages of small size, light weight, easiness in flexible installation, low cost and the like, and the working frequency section of the radiation units 21 is 3.2 GHz-4.2 GHz.

In order to enhance the performance of the electromagnetic wave emitted by the base station antenna, FR4 dielectric plate 3 is adopted as the dielectric plate 3, and the dielectric constant Er is 4.4. The dielectric plate 3 simulates a base station antenna with an FRP outer cover, so that the debugging performance outside the cover is convenient, and the electromagnetic wave of the antenna can change in wavelength after entering the FR4 dielectric plate 3 by using a certain distance between the dielectric plate 3 and the radiation unit 21, thereby eliminating the influence of the antenna cover on the wavelength of the electromagnetic wave and ensuring that the base station antenna has excellent sending and receiving efficiency.

As shown in fig. 5 to 8, the data comparison with or without the FR4 dielectric plate is significantly improved (the cross polarization ratio ± 60 ° waveform is listed by the center frequency point 3700MHz), and by using the FR4 dielectric plate 3 with the hollow groove, the standing-wave ratio is reduced in the performance of the whole machine, the isolation of the whole machine is improved, the cross polarization ratio ± 60 ° is improved, and the solution is an ideal base station antenna solution with higher practical value.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides an ultra wide band 3.5G 4T 4R's base station antenna, its characterized in that adopts vertical direction fixed connection's three layer construction, including reflecting plate (1) of bottom, high frequency radiation array (2) of intermediate level and dielectric plate (3) of top layer, high frequency radiation array (2) include a plurality of radiating element (21), it has a plurality of slots (4) to open on dielectric plate (3), and is a plurality of radiating element (21) are arranged along the length direction of reflecting plate (1) at equal intervals, radiating element (21) are arranged in directly over to dielectric plate (3), slot (4) are arranged in between adjacent radiating element (21).

2. The base station antenna of claim 1, wherein the slot hole (4) is a hollowed-out slot with L of 0.6 λ and W of 0.17 λ.

3. The base station antenna of the ultra wide band 3.5G 4T4R, which is claimed in claim 1, wherein a plurality of isolation pillars (5) are arranged on the reflector plate (1), the dielectric plate (3) is arranged above the radiating element (21) through the isolation pillars (5), and a distance d1 between the dielectric plate (3) and the radiating element (21) is 0.09-0.15 λ.

4. The base station antenna of claim 1, wherein the high-frequency radiating array (2) comprises a first radiating array (22) and a second radiating array (23), the first radiating array (22) and the second radiating array (23) are arranged side by side, and a distance d2 between the first radiating array (22) and the second radiating array (23) is 0.7-0.85 lambda.

5. The UWB 3.5G 4T4R base station antenna according to claim 1, wherein the distance d3 between adjacent radiation units (21) is 0.7-0.85 lambda.

6. The ultra-wideband 3.5G 4T4R base station antenna according to claim 4, wherein an isolation boundary I (6) is provided between the first radiating array (22) and the second radiating array (23) for reducing interference.

7. The base station antenna of the ultra wide band 3.5G 4T4R, according to claim 1, wherein two sides of the reflecting plate (1) are provided with two isolation boundaries (7) arranged along the arrangement direction of the radiating elements (21).

8. The base station antenna of claim 1, wherein the radiating element (21) is a PCB square oscillator, and the operating frequency band of the radiating element (21) is 3.2 GHz-4.2 GHz.

9. The ultra-wideband 3.5G 4T4R base station antenna as claimed in claim 1, wherein said dielectric plate (3) is FR4 dielectric plate (3) and has a dielectric constant Er of 4.4.