阅读说明：本技术 一种三低四高多端口基站天线 (Three-low four-high multiport base station antenna ) 是由 丁勇 王长江 刘义成 于 2020-06-16 设计创作，主要内容包括：本发明属于基站天线技术领域,具体涉及一种三低四高多端口基站天线,包括底板,所述底板的两个长边上分别设有反射板一和反射板二,所述底板的一个短边上设有反射板三,所述底板上设有相互平行或重叠的三组低频辐射阵列和四组高频辐射阵列,所述低频辐射阵列包括低频辐射阵列一、低频辐射阵列二和低频辐射阵列三,所述高频辐射阵列包括高频辐射阵列一、高频辐射阵列二、高频辐射阵列三和高频辐射阵列四,所述低频辐射阵列一、低频辐射阵列二、高频辐射阵列一、高频辐射阵列二、高频辐射阵列三和高频辐射阵列四各自包括若干个低频振子一、低频振子二、低频振子三、高频振子一、高频振子二、高频振子三和高频振子四。(The invention belongs to the technical field of base station antennas, and particularly relates to a three-low-four-high multiport base station antenna which comprises a bottom plate, wherein a first reflecting plate and a second reflecting plate are respectively arranged on two long edges of the bottom plate, a third reflecting plate is arranged on one short edge of the bottom plate, three groups of low-frequency radiation arrays and four groups of high-frequency radiation arrays which are parallel or overlapped are arranged on the bottom plate, the low-frequency radiation arrays comprise a first low-frequency radiation array, a second low-frequency radiation array and a third low-frequency radiation array, the high-frequency radiation arrays comprise a first high-frequency radiation array, a second high-frequency radiation array, a third high-frequency radiation array and a fourth high-frequency radiation array, and the first low-frequency radiation array, the second high-frequency radiation array, the third high-frequency radiation array and the fourth high-frequency radiation array respectively comprise a plurality of first, The high-frequency oscillator comprises a first high-frequency oscillator, a second high-frequency oscillator, a third high-frequency oscillator and a fourth high-frequency oscillator.)

1. The utility model provides a four high multiport base station antennas of three low, includes bottom plate (1), be equipped with reflecting plate (11) and reflecting plate two (12) respectively on two long edges of bottom plate (1), be equipped with reflecting plate three (13), its characterized in that on the minor face of bottom plate (1): the high-frequency radiating array comprises a first low-frequency radiating array, a second low-frequency radiating array and a third high-frequency radiating array, wherein the first low-frequency radiating array, the second low-frequency radiating array and the third low-frequency radiating array are arranged on the bottom plate (1) in parallel or overlapped, the third high-frequency radiating array comprises a first high-frequency radiating array, a second high-frequency radiating array, a third high-frequency radiating array and a fourth high-frequency radiating array, and the first low-frequency radiating array, the second high-frequency radiating array, the third high-frequency radiating array and the fourth high-frequency radiating array respectively comprise a plurality of first low-frequency oscillators (21), a second low-frequency oscillator (22), a third low-frequency oscillator (23), a first high-frequency oscillator (31), a second high-frequency.

2. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: the low-frequency vibrators I (21) and the high-frequency vibrators I (31) are arrayed in a straight line and are distributed on the bottom plate (1) at equal intervals and close to the reflecting plate I (11), and part of the high-frequency vibrators I (31) are embedded into the low-frequency vibrators I (21); the second low-frequency vibrators (22) and the second high-frequency vibrators (32) are arrayed in a straight line, are distributed on the bottom plate (1) at equal intervals and are positioned between the first low-frequency array and the second reflecting plate (12), and part of the second high-frequency vibrators (32) are embedded into the second low-frequency vibrators (22); the high-frequency oscillator three (33) and the high-frequency oscillator four (34) are respectively arrayed into a straight line, are respectively distributed on the bottom plate (1) at equal intervals and are positioned between the low-frequency array two and the reflecting plate two (12); the low-frequency oscillator three (23) array is in a straight line, is distributed on the bottom plate (1) at equal intervals and is positioned between the high-frequency array three and the high-frequency array four.

3. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: the high-frequency oscillator I (31) is embedded into the low-frequency oscillator I (21) every other, and the high-frequency oscillator II (32) is embedded into the low-frequency oscillator II (22) every other; the low-frequency oscillator I (21) and the low-frequency oscillator II (22) are respectively provided with 4-10 aluminum alloy die-casting oscillators in a bowl shape, and the low-frequency oscillator III (23) is provided with 4-10 aluminum alloy die-casting oscillators in a cross shape; the high-frequency vibrators I (31), the high-frequency vibrators II (32), the high-frequency vibrators III (33) and the high-frequency vibrators IV (34) are all aluminum alloy die-cast vibrators which are respectively provided with 4-11 and are in a half-wave form.

4. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: the bottom plate (1) is provided with a coupling bridge (4), and the coupling bridge (4) is respectively communicated with a low-frequency oscillator I (21) and a low-frequency oscillator II (22) which are aligned with each other and used for converging the horizontal beam width and improving the front-to-back ratio index.

5. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: and at least one low-frequency oscillator III (23) and the low-frequency radiation array III are arranged in a staggered mode.

6. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: and notches (111) which are recessed downwards along the top of the first reflection plate (11) are arranged on two sides of the first reflection plate (11) at the position corresponding to the first low-frequency oscillator (21), the depth of each notch (111) is h1, and the length of each notch is d 1.

7. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: the low-frequency oscillator I (21) and the low-frequency oscillator II (22) are arranged in an aligned mode, a first isolating strip (51) is arranged between the low-frequency oscillator I (21) and the low-frequency oscillator II (22), and the height of the first isolating strip (51) is h 2;

a second isolating strip (52) is arranged between the second high-frequency oscillator (32) and the third high-frequency oscillator (33), and the height of the second isolating strip (52) is h 3;

and a third isolating strip (53) is arranged between the third high-frequency oscillator (33) and the fourth high-frequency oscillator (34), and the height of the third isolating strip (53) is h 4.

8. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: the high-frequency oscillator I (31) and the high-frequency oscillator II (32) are arranged in an aligned mode; the distance between the first low-frequency vibrators (21) is d2, and the distance between the first high-frequency vibrators (31) is d 2/2;

the low-frequency oscillator III (23) is aligned with the high-frequency oscillator I (31) which is not embedded into the low-frequency oscillator I (21);

the high-frequency oscillator three (33) and the high-frequency oscillator four (34) are arranged in an aligned mode and are located on the symmetry axis of the two adjacent high-frequency oscillators I (31).

9. The triple-low-four-high multiport base station antenna of claim 1, characterized in that: the center frequencies of the three groups of low-frequency radiating arrays are f1, and the center frequencies of the four groups of high-frequency radiating arrays are f 2; the h1 is 0.03-0.07 times of the wavelength of f1, and the d1 is 0.25-0.35 times of the wavelength of f 1; the d2 is 0.7-0.9 times of the wavelength of the f 1; the h2 is 0.1-0.15 times of the wavelength of the f 1; the h3 and the h4 are both 0.14-0.26 times of the wavelength of f 2;

the vertical distance between the first low-frequency radiation array and the second low-frequency radiation array is D1, and the D1 is 0.55-0.65 times the wavelength of f 1;

the vertical distance between the second low-frequency radiation array and the third low-frequency radiation array is D2, and the D2 is 0.50-0.55 times of the wavelength of f 1.

10. The triple-low-four-high multiport base station antenna of claim 9, wherein: the vertical distance between the three low-frequency vibrators (23) arranged in a staggered mode and the three low-frequency radiation arrays is D3, the vertical distance between the three low-frequency vibrators (23) closest to the three low-frequency radiation arrays in the direction perpendicular to the three low-frequency radiation arrays is D3, the D3 is the wavelength which is 0.25-0.5 times of f1, and the D3 is the wavelength which is 0.65-0.95 times of f 1;

the distance between the high-frequency radiation array III and the high-frequency radiation array IV is D4, and the D4 is 0.6-1 times of the wavelength of f 2;

the width of the bottom plate (1) is W, and W is 1.6-1.7 times of the wavelength of f 1;

the height of the first reflecting plate (11) is h5, and the h5 is 0.1-0.2 times of the wavelength of f 1;

the height of the second reflecting plate (12) is h6, and the h6 is 0.1-0.2 times of the wavelength of f 1;

the isolation strip I (51) is provided with an opening (511) communicated with the bottom plate (1) at a position corresponding to the low-frequency oscillator I (21) and the low-frequency oscillator II (22) on the two sides, the height of the opening (511) is h7, the length of the opening is d7, h7 is 0.04-0.07 times of wavelength of f1, and d7 is 0.23-0.47 times of wavelength of f 1.

Technical Field

The invention belongs to the technical field of base station antennas, and particularly relates to a three-low four-high multiport base station antenna.

Background

With the rapid development of mobile communication systems, the complexity of the systems is higher and higher, and the antennas as important components face serious examination. In recent years, multiple network systems of 2G, 3G and 4G coexist and share a station, so that the resource of the station is increasingly tense, and particularly in cities, no redundant resource of the station is available. The multi-system antenna co-station can greatly save the space of the sky and the construction resources, the multi-port antenna becomes a trend, a technical foundation is provided for the multi-system and multi-system co-station, and the inevitable problem of the multi-port antenna is that the antenna is too large in size, so that the installation and safety risks are brought. Especially in the design of a multi-port antenna comprising multiple rows of low frequency bands (790-960 MHz), due to the frequency characteristics of the antenna, the size of the antenna is large, the installation is inconvenient, the wind load is large, and the safety is affected, so the antenna needs to be designed in a miniaturized manner, the weight of the antenna is reduced, the windward area is reduced, and the multi-port miniaturized antenna has great advantages in the aspects of antenna installation, safe use and utilization rate of sky resources.

Disclosure of Invention

In order to solve the problems, the invention discloses a three-low four-high multiport base station antenna, wherein three groups of low-frequency radiation arrays and four groups of high-frequency radiation arrays which are mutually parallel or overlapped are arranged on a bottom plate of the base station antenna, the size of the antenna is reduced, meanwhile, the horizontal beam width is effectively reduced, the front-to-back ratio is improved, and the base station antenna can cover low frequency 790-containing 960MHz and high frequency 1710-containing 2690 MHz.

In order to achieve the purpose, the invention adopts the following technical scheme:

a three-low four-high multiport base station antenna comprises a bottom plate, wherein a first reflecting plate and a second reflecting plate are respectively arranged on two long edges of the bottom plate, a third reflecting plate is arranged on one short side of the bottom plate, three groups of low-frequency radiation arrays and four groups of high-frequency radiation arrays which are mutually parallel or overlapped are arranged on the bottom plate, the low-frequency radiation array comprises a first low-frequency radiation array, a second low-frequency radiation array and a third low-frequency radiation array, the high-frequency radiation array comprises a first high-frequency radiation array, a second high-frequency radiation array, a third high-frequency radiation array and a fourth high-frequency radiation array, the low-frequency radiating array I, the low-frequency radiating array II, the high-frequency radiating array I, the high-frequency radiating array II, the high-frequency radiating array III and the high-frequency radiating array IV respectively comprise a plurality of low-frequency oscillators I, low-frequency oscillators II, low-frequency oscillators III, high-frequency oscillators I, high-frequency oscillators II, high-frequency oscillators III and high-frequency oscillators IV.

Preferably, the first low-frequency oscillator and the first high-frequency oscillator form a straight line in an array, are distributed on the bottom plate at equal intervals and are close to the first reflecting plate, and part of the first high-frequency oscillator is embedded into the first low-frequency oscillator; the low-frequency oscillator II and the high-frequency oscillator II are arrayed in a straight line, are distributed on the bottom plate at equal intervals and are positioned between the low-frequency array I and the reflecting plate II, and part of the high-frequency oscillator II is embedded into the low-frequency oscillator II; the high-frequency oscillator three and the high-frequency oscillator four are respectively arrayed into a straight line, are respectively distributed on the bottom plate at equal intervals and are positioned between the low-frequency array two and the reflecting plate two; the low-frequency oscillator three arrays are in a straight line, are distributed on the bottom plate at equal intervals and are positioned between the high-frequency array three and the high-frequency array four.

Preferably, the first high-frequency oscillator is embedded in every other low-frequency oscillator, and the second high-frequency oscillator is embedded in every other low-frequency oscillator; the low-frequency oscillator I and the low-frequency oscillator II are respectively provided with 4-10 bowl-shaped aluminum alloy die-casting oscillators, and the low-frequency oscillator III is provided with 4-10 cross-shaped aluminum alloy die-casting oscillators; the high-frequency oscillator I, the high-frequency oscillator II, the high-frequency oscillator III and the high-frequency oscillator IV are all aluminum alloy die-cast oscillators which are respectively provided with 4-11 oscillators and are in a half-wave form.

Preferably, the bottom plate is provided with a coupling bridge, and the coupling bridge is respectively communicated with a low-frequency oscillator I and a low-frequency oscillator II which are aligned with each other and used for converging the horizontal beam width and improving the front-to-back ratio index.

Preferably, at least one of the low-frequency oscillators iii is arranged to be offset from the low-frequency radiating array iii.

Preferably, the first reflection plate is provided with a notch which is recessed downwards along the top of the first reflection plate at two sides of a position corresponding to the low-frequency oscillator, the depth of the notch is h1, and the length of the notch is d 1.

Preferably, the first low-frequency oscillator and the second low-frequency oscillator are arranged in an aligned mode, a first isolating strip is arranged between the first low-frequency oscillator and the second low-frequency oscillator, and the height of the first isolating strip is h 2;

a second isolating strip is arranged between the second high-frequency oscillator and the third high-frequency oscillator, and the height of the second isolating strip is h 3;

and a third isolating strip is arranged between the third high-frequency oscillator and the fourth high-frequency oscillator, and the height of the third isolating strip is h 4.

Preferably, the first high-frequency oscillator and the second high-frequency oscillator are arranged in alignment; the distance between the first low-frequency oscillators is d2, and the distance between the first high-frequency oscillators is d 2/2;

the low-frequency oscillator III is aligned with the high-frequency oscillator I which is not nested into the low-frequency oscillator I;

the high-frequency oscillator III and the high-frequency oscillator IV are arranged in an aligned mode and are located on the symmetry axis of the two adjacent high-frequency oscillators I.

Preferably, the center frequencies of three groups of low-frequency radiating arrays are f1, and the center frequencies of four groups of high-frequency radiating arrays are f 2; the h1 is 0.03-0.07 times of the wavelength of f1, and the d1 is 0.25-0.35 times of the wavelength of f 1; the d2 is 0.7-0.9 times of the wavelength of the f 1; the h2 is 0.1-0.15 times of the wavelength of the f 1; the h3 and the h4 are both 0.14-0.26 times of the wavelength of f 2;

the vertical distance between the first low-frequency radiation array and the second low-frequency radiation array is D1, and the D1 is 0.55-0.65 times the wavelength of f 1;

the vertical distance between the second low-frequency radiation array and the third low-frequency radiation array is D2, and the D2 is 0.50-0.55 times of the wavelength of f 1.

Preferably, the vertical distance between the three low-frequency oscillators and the three low-frequency radiation arrays arranged in a staggered manner is D3, the vertical distance between the three low-frequency oscillators and the three low-frequency radiation arrays closest to the three low-frequency oscillators in the three low-frequency radiation arrays in the direction perpendicular to the three low-frequency radiation arrays is D3, the D3 is 0.25-0.5 times the wavelength of f1, and the D3 is 0.65-0.95 times the wavelength of f 1;

the distance between the high-frequency radiation array III and the high-frequency radiation array IV is D4, and the D4 is 0.6-1 times of the wavelength of f 2;

the width of the bottom plate is W, and W is 1.6-1.7 times of the wavelength of f 1;

the height of the first reflecting plate is h5, and the h5 is 0.1-0.2 times of the wavelength of f 1;

the height of the second reflecting plate is h6, and the h6 is 0.1-0.2 times of the wavelength of f 1;

the isolation strip I is provided with openings communicated with the bottom plate at positions corresponding to the low-frequency oscillator I and the low-frequency oscillator II on the two sides, the height of each opening is h7, the length of each opening is d7, h7 is 0.04-0.07 times of wavelength of f1, and d7 is 0.23-0.47 times of wavelength of f 1.

The invention has the following beneficial effects:

(1) the base station antenna is provided with three groups of low-frequency radiation arrays and four groups of high-frequency radiation arrays which are mutually parallel or overlapped on the bottom plate, the size of the antenna is reduced, the horizontal beam width is effectively reduced, the front-to-back ratio is improved, and the base station antenna can cover low-frequency 790-plus-material 960MHz and high-frequency 1710-plus-material 2690 MHz;

(2) according to the base station antenna, the first low-frequency oscillator and the first high-frequency oscillator form a straight line, part of the first high-frequency oscillator and the first low-frequency oscillator are nested, the second low-frequency oscillator and the second high-frequency oscillator form a straight line, part of the second high-frequency oscillator and the second low-frequency oscillator are nested, the third low-frequency oscillator adopts a cross-shaped aluminum alloy die-cast oscillator, and the third low-frequency oscillator, the third high-frequency oscillator and the fourth high-frequency oscillator adopt a cross avoidance arrangement mode, so that the size of the antenna can be effectively reduced, the windward side of the antenna is small, the weight is light, the;

(3) in order to reduce the size of the antenna, the distance between the first low-frequency radiation array and the second low-frequency radiation array is 0.55-0.65 times of the wavelength of the low-frequency central frequency f1, the distance is small, and the directional diagram index of a low-frequency horizontal plane can be better optimized by arranging the coupling bridge on the bottom plate;

(4) according to the invention, at least one low-frequency oscillator III and the low-frequency radiating array III are arranged in a staggered mode, and the arrangement mode can effectively reduce the mutual coupling of the arrays, effectively reduce the horizontal half-power beam width of the low-frequency radiating array III and improve the front-to-back ratio among the arrays.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of a base station antenna of the present invention;

FIG. 2 is a front view of a base station antenna of the present invention;

FIG. 3 is a right side view of the base station antenna of the present invention;

FIG. 4 is a diagram of the measured horizontal plane pattern of 2200MHz of the center frequency point of the first and second frequency bands of the high-frequency radiation arrays of the base station antenna of the present invention;

FIG. 5 is a horizontal plane actual measurement directional diagram of 2200MHz of center frequency points of a high-frequency radiation array III and a high-frequency radiation array IV of a base station antenna;

FIG. 6 is a measured directional diagram of the center frequency point 820MHz of the first and second frequency bands of the base station antenna low frequency radiation array of the present invention;

FIG. 7 is a horizontal plane measured directional diagram of 820MHz of center frequency point of three frequency bands of the low frequency radiation array of the base station antenna of the present invention;

in the figure: 1. a base plate; 11. a first reflecting plate; 111. a recess; 12. a second reflecting plate; 13. a third reflecting plate; 21. a first low-frequency oscillator; 22. a second low-frequency oscillator; 23. a low-frequency oscillator III; 31. a first high-frequency oscillator; 32. a high-frequency oscillator II; 33. a high-frequency oscillator III; 34. a high-frequency oscillator IV; 4. a coupling bridge; 51. a first isolating strip; 511. an opening; 52. a second isolating strip; 53. and a third isolating strip.

Detailed Description

The present invention will now be described in further detail with reference to examples.

A three-low-four-high multiport base station antenna is shown in figure 1-2 and comprises a bottom plate 1, wherein two long edges of the bottom plate 1 are respectively provided with a first reflecting plate 11 and a second reflecting plate 12, one short edge of the bottom plate 1 is provided with a third reflecting plate 13, the bottom plate 1 is provided with three groups of low-frequency radiating arrays and four groups of high-frequency radiating arrays which are parallel or overlapped with each other, the low-frequency radiating arrays comprise a first low-frequency radiating array, a second low-frequency radiating array and a third low-frequency radiating array, the high-frequency radiating arrays comprise a first high-frequency radiating array, a second high-frequency radiating array, a third high-frequency radiating array and a fourth high-frequency radiating array, the first low-frequency radiating array, the second high-frequency radiating array, the third high-frequency radiating array and the fourth high-frequency radiating arrays respectively comprise a plurality of low-frequency oscillators 21, second, A second high-frequency oscillator 32, a third high-frequency oscillator 33 and a fourth high-frequency oscillator 34. The three groups of low-frequency radiation arrays and the four groups of high-frequency radiation arrays are mutually parallel or overlapped, the size of the base station antenna is reduced, the horizontal beam width is effectively reduced, the front-to-back ratio is improved, and the base station antenna can cover low-frequency 790-960MHz and high-frequency 1710-2690 MHz.

In a specific embodiment, as shown in fig. 1-2, the low-frequency vibrators one 21 and the high-frequency vibrators one 31 are arrayed in a straight line and are distributed on the bottom plate 1 at equal intervals, the bottom plate is close to the reflecting plate one 11, and part of the high-frequency vibrators one 31 are embedded into the low-frequency vibrators one 21; the low-frequency oscillator II 22 and the high-frequency oscillator II 32 are arrayed in a straight line and are distributed on the bottom plate 1 at equal intervals and positioned between the low-frequency array I and the reflecting plate II 12, and part of the high-frequency oscillator II 32 is embedded into the low-frequency oscillator II 22; the high-frequency oscillator three 33 and the high-frequency oscillator four 34 are respectively arrayed into a straight line, are respectively distributed on the bottom plate 1 at equal intervals and are positioned between the low-frequency array two and the reflecting plate two 12; the low-frequency oscillator three 23 arrays are in a straight line, are distributed on the bottom plate 1 at equal intervals and are positioned between the high-frequency array three and the high-frequency array four. The first low-frequency oscillator 21 and the first high-frequency oscillator 31 are arrayed into a straight line, part of the first high-frequency oscillator 31 and the first low-frequency oscillator 21 are nested, the second low-frequency oscillator 22 and the second high-frequency oscillator 32 are arrayed into a straight line, and part of the second high-frequency oscillator 32 and the second low-frequency oscillator 22 are nested, so that the size of the antenna can be effectively reduced.

In a specific embodiment, as shown in fig. 1-2, every other high-frequency oscillator 31 is embedded into a low-frequency oscillator 21, and every other high-frequency oscillator 32 is embedded into a low-frequency oscillator 22; the low-frequency oscillator I21 and the low-frequency oscillator II 22 are respectively provided with 4-10 bowl-shaped aluminum alloy die-casting oscillators, and the low-frequency oscillator III 23 is provided with 4-10 cross-shaped aluminum alloy die-casting oscillators; the high-frequency oscillator I31, the high-frequency oscillator II 32, the high-frequency oscillator III 33 and the high-frequency oscillator IV 34 are all provided with 4-11 aluminum alloy die-cast oscillators in a half-wave form. The low-frequency oscillator three 23 adopts a cross-shaped aluminum alloy die-casting oscillator, and a cross avoidance arrangement mode is adopted together with the high-frequency oscillator three 33 and the high-frequency oscillator four 34, so that the size of the antenna can be effectively reduced, the windward side of the antenna is small, the weight is light, the antenna is convenient to mount, and the safety is high.

In a specific embodiment, as shown in fig. 1-2, the bottom plate 1 is provided with a coupling bridge 4, and the coupling bridge 4 is respectively communicated with a first low-frequency oscillator 21 and a second low-frequency oscillator 22 which are aligned with each other, so as to converge the horizontal beam width and improve the front-to-back ratio index.

In one particular embodiment, as shown in fig. 1-2, at least one low frequency vibrator three 23 is positioned offset from the low frequency radiating array three. The setting mode can effectively reduce the mutual coupling of the arrays, effectively reduce the horizontal half-power beam width of the low-frequency radiation array III and improve the front-to-back ratio among the arrays.

In a specific embodiment, as shown in fig. 1, the first reflection plate 11 is provided with notches 111 recessed downward along the top of the first reflection plate 11 on both sides of the position corresponding to the first low frequency oscillator 21, and the notches 111 have a depth h1 and a length d 1.

In a specific embodiment, as shown in fig. 1-3, the first low-frequency oscillator 21 and the second low-frequency oscillator 22 are arranged in alignment, a first isolation strip 51 is arranged between the first low-frequency oscillator 21 and the second low-frequency oscillator 22, and the height of the first isolation strip 51 is h 2;

a second isolating bar 52 is arranged between the second high-frequency oscillator 32 and the third high-frequency oscillator 33, and the height of the second isolating bar 52 is h 3;

a third isolation strip 53 is arranged between the third high-frequency oscillator 33 and the fourth high-frequency oscillator 34, and the height of the third isolation strip 53 is h 4.

In a specific embodiment, as shown in fig. 1-2, the first high-frequency oscillator 31 is arranged in alignment with the second high-frequency oscillator 32; the distance between the low-frequency vibrators I21 is d2, and the distance between the high-frequency vibrators I31 is d 2/2;

the low-frequency oscillator III 23 is aligned with the high-frequency oscillator I31 which is not embedded into the low-frequency oscillator I21;

the high-frequency oscillator three 33 and the high-frequency oscillator four 34 are arranged in alignment and are positioned on the symmetry axis of the adjacent two high-frequency oscillators one 31.

In one specific embodiment, as shown in fig. 1-3, the center frequencies of the three sets of low frequency radiating arrays are all f1, and the center frequencies of the four sets of high frequency radiating arrays are all f 2; h1 is 0.03-0.07 times wavelength of f1, d1 is 0.25-0.35 times wavelength of f 1; d2 is 0.7-0.9 times the wavelength of f 1; h2 is 0.1-0.15 times wavelength of f 1; both h3 and h4 have the wavelength of 0.14-0.26 times of f 2;

the vertical distance between the first low-frequency radiation array and the second low-frequency radiation array is D1, and D1 is 0.55-0.65 times of the wavelength of f 1;

the vertical distance between the second low-frequency radiation array and the third low-frequency radiation array is D2, and D2 is 0.50-0.55 times of the wavelength of f 1.

The distance D1 between the first low-frequency radiation array and the second low-frequency radiation array is 0.55-0.65 times of the wavelength of the low-frequency center frequency f1, the distance is small, and the directional diagram index of a low-frequency horizontal plane can be better optimized by arranging the coupling bridge on the bottom plate.

In a specific embodiment, as shown in fig. 1-2, the vertical distance between the low-frequency vibrator three 23 and the low-frequency radiation array three in the staggered arrangement is D3, the vertical distance between the low-frequency vibrator three 23 closest to the low-frequency radiation array three in the direction perpendicular to the low-frequency radiation array three is D3, D3 is 0.25-0.5 times wavelength of f1, and D3 is 0.65-0.95 times wavelength of f 1;

the distance between the high-frequency radiation array III and the high-frequency radiation array IV is D4, and D4 is 0.6-1 time wavelength of f 2;

the width of the bottom plate 1 is W, and W is 1.6-1.7 times of the wavelength of f 1;

the height of the first reflecting plate 11 is h5, and h5 is 0.1-0.2 times of the wavelength of f 1;

the height of the second reflecting plate 12 is h6, and h6 is 0.1-0.2 times of the wavelength of f 1;

the first isolating strip 51 is provided with an opening 511 communicated with the bottom plate 1 at a position corresponding to the first low-frequency oscillator 21 and the second low-frequency oscillator 22 on the two sides, the height of the opening 511 is h7, the length of the opening is d7, the h7 is 0.04-0.07 times of the wavelength of f1, and the d7 is 0.23-0.47 times of the wavelength of f 1.

As can be seen from fig. 4-7, on the premise of miniaturization, the horizontal plane radiation performance (horizontal beam width and front-to-back ratio) of the high-low frequency center frequency point of the three-low four-high multiport base station antenna is superior, and the base station antenna is an ideal base station antenna solution with high practical value.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.