CN203232955U - Antenna oscillator and antenna with same - Google Patents

Abstract

The utility model is applicable to the technical field of antenna structure, and provides an antenna oscillator and an antenna with the antenna oscillator. The antenna oscillator comprises an oscillator component. The oscillator component comprises a radiation part and a balun part. The antenna oscillator further comprises a parasitic component. The parasitic component comprises an upper parasitic member and a lower parasitic member. The upper parasitic member is arranged above the oscillator component. The lower parasitic member is annular and is sleeved on the periphery of the oscillator component. The upper parasitic member is flaky. The antenna comprises a feed component, a reflection component and the antenna oscillator. The oscillator component is connected with the reflection component. The feed component is connected with the oscillator component. According to the antenna provided by the utility model, due to beneficial secondary radiation caused by the parasitic component and the oscillator component, the antenna still can reach the set half power beam width under the condition that the size of the reflection component is very small, and has the significant advantage of miniaturization.

Description

Antenna vibrator and antenna with same

technical field

The utility model belongs to the field of antenna structures, in particular to an antenna oscillator and an antenna with the antenna oscillator.

Background technique

The antenna of the base station plays a connecting role in the mobile communication system, and is a sensor for transmitting and receiving electromagnetic waves. The performance of the antenna plays a decisive role in the entire communication system. The input cost of the antenna accounts for only a few percent of the total cost of the entire base station. However, its excellent performance can affect 30% to 50% of the reliability of the base station system. Therefore, a pair of high-performance antennas can relax system design requirements and improve overall system performance.

With the continuous increase of network coverage and capacity of my country's mobile communications, the number of base station antennas has increased sharply, problems such as channel congestion, deterioration of the electromagnetic environment, complex installation of base station antennas, large footprints, and increasingly difficult site selection for base stations have become increasingly prominent. Research on base station antennas has become an urgent problem to be solved. Generally speaking, new base station antennas mainly use technologies such as MIMO technology, dual-polarized antenna technology, active integrated antenna technology, and new electromagnetic material antenna technology. It develops in the directions of globalization, broadband, multi-band, high efficiency, and adaptability to various requirements of the system. With the continuous enhancement of people's awareness of environmental protection and health, people increasingly reject the base station antennas erected on urban buildings. Therefore, the miniaturization of antennas is particularly important. In addition, the reduction in the size of the antenna can reduce the wind load of the antenna, thereby reducing the installation requirements of the antenna.

The miniaturization design of the base station antenna is mainly considered from two aspects. On the one hand, the miniaturization of the base station antenna requires the selection of an appropriate antenna form. The commonly used base station antenna forms mainly include vibrator type, patch type and ring type. The most common type is the vibrator type. Compared with the classic straight-arm vibrator, the planar vibrator can miniaturization to a certain extent. On the other hand, the base station antenna usually needs to add a reflector with a much larger electrical size behind the vibrator to generate directional radiation. At the same time, the reflector is used to control the gain, beam width and front-to-back ratio, so the size of the reflector determines the size of the base station antenna. total measurement.

Generally speaking, the larger the size of the reflector, the better the front-to-rear ratio performance of the antenna, and it is also conducive to the control of the pattern, but this often leads to an increase in the overall size of the base station antenna. The horizontal half-power beamwidth of the base station antenna is usually required to be 65°±5°. In order to meet this condition, the conventional base station antenna has to control the beam by increasing the size of the reflector, which makes the miniaturization of the base station antenna very difficult. The size of the antenna in the prior art is relatively large, which makes installation inconvenient.

Utility model content

The utility model provides an antenna vibrator and an antenna with the antenna vibrator, which are small in size and easy to install.

On the one hand, as a first implementation, the present invention provides an antenna vibrator, including a vibrator component, the vibrator component includes a radiation part and a balun part, and the radiation part and the balun part are integrally formed or fixedly connected; The antenna element also includes a parasitic component for coupling with the oscillator component and generating secondary radiation; the parasitic component includes an upper parasitic component and a lower parasitic component, and the upper parasitic component is arranged above the oscillator component, The lower parasitic member is ring-shaped, and the lower parasitic member is sleeved on the periphery of the vibrator part; the upper parasitic member is sheet-like.

In combination with the first implementation situation, as a second implementation situation, the radiation part is integrally cast and formed at one end of the balun part, and the other end of the balun part is fixedly welded or fixedly connected to the balun part through a locking piece. In the reflecting component, the radiation part includes a plurality of radiation oscillators, and each radiation oscillator is arranged at intervals in the circumferential direction and connected to the balun part respectively.

With reference to the second implementation situation, as a third implementation situation, the oscillator component is a ±45° dual-polarized cross oscillator, and the radiation oscillator is in the shape of a plate or a ring.

With reference to the third implementation situation, as a fourth implementation situation, the radiation oscillator is in the shape of a plate, which includes a transverse plate portion and a longitudinal plate portion connected to the transverse plate portion.

In combination with the fourth implementation situation, as a fifth implementation situation, the transverse plate part is in the shape of an isosceles trapezoid, its shorter bottom edge is integrally cast and formed on the balun part, and the longitudinal plate part is integrally cast and formed on the The longer bottom edge of the transverse plate portion.

In combination with any one of the first to fifth implementation situations, as a sixth implementation situation, the upper parasitic member is in the shape of a plate, and the lower parasitic member is in the shape of a ring.

In the second aspect, as the first implementation of the second aspect, the utility model provides an antenna, which includes a feeding component, a reflecting component, and the antenna dipole described in the first aspect, and the vibrating component is connected to the reflecting component, the feed component is connected to the vibrator component.

With reference to the first implementation situation of the second aspect, as a second implementation situation of the second aspect, the balun portion is provided with compartments for dividing the balun portion into a plurality of subsections.

In combination with the second implementation of the second aspect, as the third implementation of the second aspect, four radiation oscillators are provided, two separation slots are provided and the balun portion is divided into four subdivisions. The two divisions are vertically intersected, and the four divisions are respectively the first division, the second division, the third division and the fourth division, wherein the first division and the The third subsection is arranged diagonally, and the second subsection and the fourth subsection are arranged diagonally.

In combination with the third implementation of the second aspect, as the fourth implementation of the second aspect, feed holes are provided on the first subsection and the second subsection, and the third subsection and the fourth subsection Balance holes are arranged on the parts; the feeding part includes two feeding bodies, and the feeding body includes a feeding medium body and a feeding probe connected to the feeding medium body; one of the feeding bodies The feeding dielectric body of the first subsection is arranged in the feeding hole of the first subsection, and the feeding probe is connected to the third subsection or to the radiation oscillator on the third subsection; The feeding dielectric body of the electric body is arranged in the feeding hole of the second subsection, the feeding probe is connected to the fourth subsection or to the radiation oscillator on the fourth subsection, and the two The feeding probes of the above-mentioned feeding body are arranged in a staggered manner.

In combination with any one of the first to fourth implementations of the second aspect, as the fifth implementation of the second aspect, a reflection cavity is provided at the end of the reflection member that is opposite to the vibrator component, and the reflection cavity is an arc surface Or conical shape, the center of the reflective cavity is provided with a mounting hole, the other end of the balun part is inserted into the mounting hole and fixedly connected to the reflective part.

In combination with any one of the first to fourth implementations of the second aspect, as the sixth implementation of the second aspect, the upper parasitic member is in the shape of a rectangular plate and is arranged at a distance from the vibrator component, and the upper parasitic member passes through The insulating first bracket is connected to the vibrator component or the reflective component or the installation surface.

In combination with any one of the first to fourth implementations of the second aspect, as the seventh implementation of the second aspect, the lower parasitic member is in the shape of a polygonal ring and is located between the radiation part and the reflection part, so The following parasitic components are connected to the vibrator component or the reflective component or the mounting surface through an insulating second bracket.

In combination with any one of the first to fourth implementations of the second aspect, as the eighth implementation of the second aspect, the shape of the reflection component is square, the upper parasitic member is square, and the two upper parasitic members A diagonal line is parallel to two of the outer sides of the reflection part; the lower parasitic member is in an octagonal ring shape, and the four sides separated by the lower parasitic member are from the four outer sides of the reflection part The sides are parallel.

With reference to the eighth implementation of the second aspect, as the ninth implementation of the second aspect, the lateral size of the upper parasitic member is smaller than the cross-sectional size of the radiation portion; the inner ring size of the lower parasitic member is larger than that of the radiation portion Cross-sectional size, a reflective cavity is provided at the end of the reflective component opposite to the vibrator component.

The antenna vibrator provided by the utility model and the antenna with the antenna vibrator are provided with a parasitic component for coupling with the vibrator component and generating secondary radiation, and the beneficial secondary radiation caused by the parasitic component and the vibrator component makes the antenna in the The set half-power beam width can still be achieved when the reflection part is small in size, which has the obvious advantage of miniaturization, and can be used as an array unit in the design of high-performance miniaturized base station antennas.

Description of drawings

Fig. 1 (a) is the three-dimensional schematic view of the overall assembly of the antenna provided by the embodiment of the present invention;

Fig. 1 (b) is the front view of the antenna that the utility model embodiment provides;

Fig. 1 (c) is the top view of the antenna provided by the utility model embodiment;

Fig. 2 (a) is the three-dimensional schematic view of the vibrator part in the antenna vibrator provided by the embodiment of the present invention;

Fig. 2(b) is a top view of the vibrator part in the antenna vibrator provided by the embodiment of the present invention;

Fig. 2 (c) is the bottom view of the vibrator part in the antenna vibrator provided by the embodiment of the present invention;

Fig. 3 is a three-dimensional schematic diagram of the feeding part in the antenna provided by the embodiment of the present invention;

Fig. 4 (a) is the three-dimensional schematic view of the reflector in the antenna provided by the embodiment of the present invention;

Fig. 4 (b) is the top view of the reflecting part in the antenna provided by the embodiment of the present invention;

Fig. 5(a) is a three-dimensional schematic diagram of the parasitic components in the antenna vibrator provided by the embodiment of the present invention;

Fig. 5(b) is a top view of the parasitic components in the antenna vibrator provided by the embodiment of the present invention;

Fig. 6 is the operating frequency-SWR curve diagram in the antenna provided by the embodiment of the present invention;

Fig. 7 is the operating frequency-port coupling coefficient graph of the antenna provided by the embodiment of the present invention;

Fig. 8 (a) is the horizontal plane radiation pattern at the 2.5GHz frequency point when the antenna provided by the embodiment of the utility model is single-fed at -45°;

Fig. 8 (b) is the horizontal plane radiation pattern at the 2.56GHz frequency point when the antenna provided by the embodiment of the utility model is single-fed at -45°;

Fig. 8 (c) is the horizontal plane radiation pattern at the 2.69GHz frequency point when the antenna provided by the embodiment of the utility model is single-fed at -45°;

Fig. 9 (a) is the vertical plane radiation pattern at the 2.5GHz frequency point when the antenna provided by the embodiment of the utility model is single-fed at -45°;

Fig. 9 (b) is the vertical plane radiation pattern at the 2.56GHz frequency point when the antenna provided by the embodiment of the utility model is single-fed at -45°;

Fig. 9 (c) is the vertical plane radiation pattern at the 2.69GHz frequency point when the antenna provided by the embodiment of the utility model is single-fed at -45°;

Figure 10 is a summary of indicators of the ±45° vibrator of the antenna provided by the embodiment of the present invention at each frequency point of 3dB horizontal beamwidth, 3dB vertical beamwidth, cross-polarization ratio, unit gain, and front-to-back ratio of main polarization.

Detailed ways

In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Fig. 1(a), Fig. 1(b) and Fig. 1(c), an antenna vibrator provided by the embodiment of the present invention can be used as an array element in an antenna on a mobile communication base station.

As shown in FIG. 1( a ), FIG. 1( b ) and FIG. 1( c ), the above-mentioned antenna element includes a dipole part 11 and a parasitic part 14 for coupling with the dipole part 11 and generating secondary radiation. The dipole part 11 may be connected to the reflection part 13 in the antenna, and the dipole part 11 may be connected to the feed part 12 . In a specific application, the feeding part 12 is connected to the vibrator part 11 , and the vibrator part 11 is connected to the reflection part 13 . The vibrator component 11 includes a radiation part 111 and a balun part 112, and the radiation part 111 and the balun part 112 are integrally formed or fixedly connected. The balun portion 112 can be used for balanced feeding and supporting the radiation portion 111 . Balun is the English transliteration of the balanced unbalanced converter. The principle is based on the antenna theory. The dipole antenna is a balanced antenna, while the coaxial cable is an unbalanced transmission line. If they are directly connected, the sheath of the coaxial cable will have a high High-frequency current flows (according to the principle of coaxial cable transmission, high-frequency current should flow inside the cable, and the outer skin is a shielding layer, so there is no current), which will affect the radiation of the antenna. Therefore, it is necessary to add a balun between the antenna and the cable to suppress the current flowing into the outside of the cable shield, that is to say, to cut off the high-frequency current flowing from the vibrator through the outer skin of the cable shield. The radiation part 111 is integrally connected to one end of the balun part 112 , and the other end of the balun part 112 is connected to the reflection member 13 . The vibrator part 11 can be integrally cast, which can effectively improve the consistency of the vibrator part 11, increase the port isolation and cross-polarization ratio, and also shorten the manufacturing cycle and reduce the manufacturing cost.

As shown in Figure 1(a), Figure 1(b) and Figure 1(c), the parasitic component 14 can control the beam width and the front-to-back ratio of the main polarization by coupling with the oscillator component 11 and generating beneficial secondary radiation. In order to increase the impedance bandwidth of the antenna and sharpen the main beam, it solves the problem in the prior art that the size of the antenna is too large by increasing the size of the reflector to control the beam width and front-to-back ratio, thus ensuring the half-power beam , the front-to-back ratio conforms to the indicators, etc., the impedance bandwidth and the pattern bandwidth are increased, and the size of the reflection part 13 with the largest shape in the antenna is reduced, thereby making the antenna miniaturized, which is beneficial to reducing the installation space required by the antenna and reducing the antenna’s size. Production cost and installation cost, making the antenna easy to install. Moreover, the sharpening of the beam and the widening of the antenna frequency band are realized by the parasitic component 14, so that the antenna provided by the embodiment of the present invention can be shared by multiple networks, and can also be a high-performance IMT-Advanced (International MobileTelecommunications-Advanced, Advanced International Mobile Communication) system to provide active integrated antenna design solutions.

Specifically, as shown in FIG. 1(a), FIG. 1(b) and FIG. 1(c), the parasitic component 14 includes an upper parasitic member 141 and a lower parasitic member 142, and the upper parasitic member 141 is arranged above the vibrator component 11 and It is arranged at a distance from the oscillator part 11 to form beneficial secondary radiation. The lower parasitic member 142 is ring-shaped, and the lower parasitic member 142 is sleeved on the periphery of the vibrator part 11 and arranged at a distance from the vibrator part 11 to form beneficial secondary radiation. Both the upper parasitic member 141 and the lower parasitic member 142 are separated from the vibrator part 11 , that is, the upper parasitic member 141 and the lower parasitic member 142 are not electrically connected to the vibrator part 11 to form a coupling. The upper parasitic component 141 and the lower parasitic component 142 can resonate at the low frequency end, expanding the bandwidth to the low frequency, and the guiding unit can resonate at the high frequency end, expanding the bandwidth to the high frequency, which generally increases the impedance bandwidth of the vibrator. Conventional oscillators need a reflector with a relatively large size to ensure the gain and appropriate beam width; and the antenna provided by the utility model, due to the existence of the parasitic component 14, can ensure a relatively small reflector. High gain and suitable beam width. This is because the dipole part 11 (guiding unit), the secondary radiation of the parasitic part 14 and the main radiation of the dipole are superimposed in the main direction, thereby obtaining a higher gain and a narrower beam than a single dipole. The upper parasitic member 141 may be in the shape of a sheet, such as a sheet with a square shape, a sheet with a circular shape, a sheet with an arc or wave shape in cross-section, and the like.

Specifically, as shown in Fig. 1(a), Fig. 1(b) and Fig. 1(c), the radiating part 111 is integrally cast and formed on one end of the balun part 112, and the other end of the balun part 112 is fixedly welded to or passed through The locking member is fixedly connected to the reflection component 13 .

Specifically, as shown in Fig. 2(a), Fig. 2(b) and Fig. 2(c), the vibrator component 11 can be a ±45° dual-polarized cross vibrator or other types of vibrators, and the radiation vibrator can be in the shape of a plate or ring or other suitable shape. The use of dual-polarized antennas can greatly reduce the number of antennas, simplify antenna engineering installation, and reduce the space occupied by antennas.

Specifically, as shown in Fig. 2(a), Fig. 2(b) and Fig. 2(c), in this embodiment, the radiation oscillator is plate-shaped, which includes a transverse plate portion 1111 and a longitudinal plate connected to the transverse plate portion 1111. plate portion 1112 . The transverse plate part 1111 is a planar vibrator structure. Compared with the classic arm structure in the prior art, the planar vibrator can be miniaturized to a certain extent. Moreover, by further providing an upwardly folded longitudinal plate portion 1112 on the outer side of the transverse plate, it can extend the current path, thereby further facilitating the miniaturization design of the vibrator.

Specifically, in this embodiment, as shown in Fig. 2(a), Fig. 2(b) and Fig. 2(c), the transverse plate part 1111 is in the shape of an isosceles trapezoid, and its shorter bottom edge is integrally cast and formed in Ba The length portion 112 and the longitudinal plate portion 1112 are integrally cast on the longer bottom edge of the transverse plate portion 1111 . Understandably, the radiation oscillator can also be set to a suitable shape according to actual conditions.

In this embodiment, due to the use of the integrated casting design of the radiation part 111 and the balun part 112, the consistency of the antenna is ensured; the design of the radiation oscillator as a bent isosceles trapezoidal structure reduces the transverse direction of the oscillator to a certain extent Area; the upper parasitic member 141 and the lower parasitic member 142 form beneficial secondary radiation through coupling, and can play a role in controlling the front-to-back ratio of the beam and the main polarization under the condition that the reflecting part 13 is small in size. Due to the size of the reflecting part 13 , the base station antenna can be further miniaturized.

The utility model also provides an antenna, which includes a feeding part 12, a reflecting part 13 and the above-mentioned antenna vibrator, the vibrator part 11 is connected to the reflecting part 13, and the feeding part 12 is connected to the vibrator Part 11.

Specifically, as shown in Fig. 2(a), Fig. 2(b) and Fig. 2(c), the balun part 112 is provided with compartments 110 for dividing the balun part 112 into a plurality of subdivisions, and the radiation The part 111 includes a plurality of radiation oscillators. In this embodiment, there are four radiation oscillators, which are respectively radiation oscillators 110a, 110b, 110c and 110d. On the Division 112 of Barron's Division. The depth of the separation groove 110 is extended from the surface of the radiator to a distance of 1 to 5 mm from the bottom of the balun part 112 or set to other depths.

Specifically, as shown in FIG. 2( a ), FIG. 2( b ) and FIG. 2( c ), in this embodiment, there are two compartments 110 and the balun portion 112 is divided into four subsections. The cross-section of the balun part 112 is square, and the two compartments 110 are vertically intersected to divide the balun part 112 equally. The fourth subsection 112d, wherein the first subsection 112a is arranged diagonally to the third subsection 112c, and the second subsection 112b is arranged diagonally to the fourth subsection 112d.

Specifically, as shown in FIG. 2(a), FIG. 2(b) and FIG. 2(c), at the diagonals between the first subsection 112a and the third subsection 112c, the third subsection 112c and the fourth subsection The opposite corners of 112d are provided with triangular grooves 1124 , and the triangular grooves 1124 are as deep as the separation grooves 110 . In this way, the port isolation can be improved and the cross-polarization ratio can be increased, and the performance of the antenna can be improved on the premise of miniaturization of the antenna.

Specifically, as shown in FIG. 2(a), FIG. 2(b) and FIG. 2(c) and FIG. The feeding probe 122 of the dielectric body 121; the first subsection 112a and the second subsection 112b are provided with feeding holes 1121, and the feeding holes 1121 are used to fill the feeding probe 122 and the feeding dielectric body 121, respectively ±45° vibrator feed. Both the third subsection 112c and the fourth subsection 112d are provided with balance holes 1122; the feeding dielectric body 121 of one of the feeders is set in the feeding hole 1121 of the first subsection 112a, and the feeding probe 122 can pass through connected to the third subsection 112c or to the radiation oscillator 111c on the third subsection 112c by means of welding or the like; the feeding dielectric body 121 of the other feeding body is set in the feeding hole 1121 of the second subsection 112b, and the feeding The electrical probes 122 may be connected to the fourth subsection 112d or to the radiation oscillator 111d on the fourth subsection 112d by means of welding or the like, and the feeding probes 122 of the two feeding bodies are arranged alternately.

Both the feed hole 1121 and the balance hole 1122 may be circular and are arranged at the central axis of each corresponding subsection, and accordingly, the feed medium body 121 may be cylindrical.

Specifically, as shown in FIG. 2(a), FIG. 2(b), FIG. 2(c) and FIG. 3, the upper end of the first subsection 112a and the upper end of the third subsection 112c are respectively provided with feeders for accommodating one of them. The first notch 1123a and the third notch 1123c of the electrical probe 122, the upper end of the second subsection 112b and the upper end of the fourth subsection 112d are provided with a second notch 1123b and a fourth notch for accommodating another feeding probe 122, respectively. The notch 1123d, and the second notch 1123b and the fourth notch 1123d are deeper or shallower than the first notch 1123a and the third notch 1123c. In this way, the two power feeders can be arranged up and down without mutual influence, and the reliability of the antenna is good. By setting the first notch 1123a, the third notch 1123c, the second notch 1123b and the fourth notch 1123d, the function of fixing the feeding probe 122 can also be played while feeding power.

In the present embodiment, as shown in Fig. 2 (a), Fig. 2 (b) and Fig. 2 (c) and Fig. 3, the feeding part that the antenna needs to be assembled consists of a feeding probe 122 and a cylindrical feeding dielectric body 121 Composition, the feed probe 12221 and the feed medium body 121 are combined and fixed in the feed hole 1121 and the third gap 1123c for the -45° radiation oscillator feed, and the feed probe 122 and the feed medium body 121 are combined and fixed on the feed The hole 1121 and the fourth notch 1123d feed the +45° radiation oscillator. In this embodiment, the minimum distance between adjacent radiating oscillators is the width of the separation slot 110 , and each subsection is arranged coaxially with the feeding through hole or balance hole 1122 above it.

Specifically, as shown in Figure 2(a), Figure 2(b) and Figure 2(c) and Figure 3, the feed hole 1121 runs through the balun part 112, the balance hole 1122 is a blind hole, and the balance hole 1122 and The depths of the compartments 110 are equal.

Specifically, as shown in Fig. 4(a) and Fig. 4(b), the reflective part 13 is in the shape of a plate, and one end of the reflective part 13 facing the vibrator part 11 is provided with a reflective cavity 131, and the reflective cavity 131 is an arc surface or a conical surface shape, which increases the reflection area, and the gradual arc or conical surface can make the beam uniform and stable. Compared with the reflector of the conventional base station antenna unit, the reflector 13 has a much smaller size. A mounting hole 132 is provided in the center of the reflection cavity 131 , and the other end of the balun portion 112 is inserted into the mounting hole 132 and can be fixedly connected to the reflection component 13 by welding. The installation hole 132 can be a through hole, and its shape can match the shape of the balun part 112 . The mounting hole 132 may be in a square shape to match the square balun portion 112 .

In this embodiment, as shown in FIG. 4( a ) and FIG. 4( b ), the reflective cavity 131 can be regarded as being formed by digging out an inverted cone from a cuboid.

Specifically, as shown in FIG. 5(a) and FIG. 5(b), the upper parasitic member 141 is plate-shaped and spaced from the vibrator part 11. The upper parasitic member 141 is connected to the vibrator part 11 or the reflector part 11 through an insulating first bracket. Part 13 or mounting surface. The installation surface may be the installation surface of the antenna, such as the ground, the roof, an antenna support, and the like.

Optionally, as shown in FIG. 5( a ) and FIG. 5( b ), the upper parasitic member 141 is in the shape of a rectangular sheet, and the upper parasitic member 141 and the vibrator component 11 can be arranged coaxially.

Specifically, as shown in Figure 5(a) and Figure 5(b), the lower parasitic member 142 is ring-shaped and located between the radiation part 111 and the reflection part, and the lower parasitic member 142 is connected to the vibrator part through an insulating second bracket 11 or reflective member 13 or mounting surface.

Optionally, as shown in FIG. 5( a ) and FIG. 5( b ), the lower parasitic member 142 is in a polygonal ring shape, and the upper parasitic member 141 and the lower parasitic member 142 are coaxially arranged with the vibrator component 11 .

Optionally, as shown in Fig. 5(a) and Fig. 5(b), in this embodiment, the shape of the reflective component 13 is square, the upper parasitic member 141 is square, and the two diagonal lines of the upper parasitic member 141 and Two of the outer sides of the reflective component 13 are parallel; the lower parasitic member 142 is in an octagonal ring shape, and the four sides separated by the lower parasitic member 142 are parallel to the four outer sides of the reflective member 13 .

Optionally, as shown in Figure 5(a) and Figure 5(b), the lateral size of the upper parasitic member 141 is smaller than the cross-sectional size of the radiation part 111; the inner ring size of the lower parasitic member 142 is larger than the cross-sectional size of the radiation part 111, the lower The size of the outer ring of the parasitic member 142 is greater than the size of the upper parasitic member 141; the end of the reflecting part 13 facing the vibrator part 11 is provided with a reflecting cavity 131, and the size of the outer ring of the lower parasitic member 142 is different from the size of the great circle at the upper end of the reflecting cavity 131. more than 10 mm.

In this embodiment, the vibrator part 11, the feeding probe 122, the reflecting part 13, the upper parasitic member 141, and the lower parasitic member 142 can all be made of metal materials, and the cylindrical feeding medium body 121 wrapping the feeding probe 122 can be A dielectric material with a dielectric constant of 1.5-3.0 is selected, and more preferably, a dielectric material with a dielectric constant of 2.1-2.6 can be selected for the feeding dielectric body 121 .

It can be understood that the size, shape and structure of the upper parasitic member 141, the lower parasitic member 142 and other components can be set according to actual needs.

The software simulation results show that the antenna of the utility model realizes the miniaturization design of the base station antenna unit under the condition of satisfying the performance index of the base station antenna. The working frequency band of the antenna of the utility model is 2.5GHz-2.69GHz, and the half-power lobe width of the horizontal plane and the half-power lobe width of the vertical plane are within the range of 65°±5°. At the same time, the antenna gain, standing wave ratio, isolation, and cross polarization The ratio before and after the main polarization all meet the requirements of the antenna index of the base station.

The advantages of the antenna provided by the utility model can be further illustrated by the following simulation:

1. Simulation content:

The voltage standing wave ratio, port isolation, and far-field radiation pattern of the antenna in the above embodiment are simulated and calculated by using simulation software.

2. Simulation results:

Figure 6 is the operating frequency of the antenna - voltage standing wave ratio curve. It can be found from Figure 6 that the working frequency band of the antenna of the present invention is 2.5GHz-2.69GHz under the condition that the VSWR is less than 1.5, and can cover all frequency bands of WIMAX (Worldwide Interoperability for Microwave Access).

Fig. 7 is a graph of the working frequency-port coupling coefficient of the antenna. It can be seen from Fig. 7 that the port isolation of the antenna of the present invention in the entire working frequency band of 2.5GHz-2.69GHz is greater than 45dB, which is better than the port isolation index of common base station antennas.

Figure 8 is the horizontal plane pattern of the utility model antenna when the -45° vibrator is fed by a single port. The pattern includes main polarization and cross polarization. Figure 8(a), Figure 8(b), Figure 8(c ) are the radiation pattern of the antenna at three frequency points of 2.5GHz, 2.56GHz and 2.69Ghz respectively. It can be seen from the figure that the pattern changes smoothly in the entire working frequency band of 2.5GHz-2.69GHz, the cross polarization level in the main lobe is low, and the front and back of the main polarization are relatively high. At the same time, it can be seen that the back lobe is mainly composed of cross caused by polarization.

Fig. 9(a), Fig. 9(b) and Fig. 9(c) are the vertical direction diagrams of the antenna of the present invention when the -45° vibrator is fed by a single port. Comparing the horizontal direction diagram in Fig. 8, it can be seen that both The difference in direction diagram is very small. In addition, only the directional diagram of the -45° oscillator single-fed is given here, and the actual simulated +45° oscillator single-fed directional diagram is basically consistent with the -45° single-fed directional diagram.

Figure 10 shows the 3dB horizontal lobe width, the 3dB vertical lobe width, the cross-polarization ratio in the ±30° lobe, the unit gain, and the front-to-back ratio of the main polarization of the ±45° vibrator of the antenna of the present utility model at each frequency point Summary of indicators. It can be seen from the table that the 3dB horizontal beamwidth and 3dB vertical beamwidth change smoothly, meeting the index requirements (2500MHz～2690MHz-65°±5°), in addition, the cross-polarization ratio is greater than 17dB, and the main polarization front-to-back ratio is greater than 27dB , and also meet the index requirements of the base station antenna. It can be seen from the table that the utility model antenna realizes the miniaturization of the base station antenna unit under the condition of satisfying the related performance parameter indexes of the base station antenna.

In the antenna provided by the embodiment of the present invention, the beneficial secondary radiation caused by the parasitic component 14 and the vibrator component 11 enables the antenna to achieve a half-power beam width of 65°±5° even when the size of the reflective component 13 is small. At the same time, the VSWR, working bandwidth, gain, port isolation, cross-polarization, and front-to-back ratio of the main polarization all meet the requirements of the base station antenna index. At the same time, the integrated design of the oscillator part 11 also ensures that the antenna has good consistency during processing. It has the obvious advantages of miniaturization, and can be used as an array unit in the design of high-performance miniaturized base station antennas.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present utility model should be included in the utility model. within the scope of protection.

Claims (15)

1. an antenna oscillator comprises oscillator component, and described oscillator component comprises Department of Radiation and Ba Lun portion, and described Department of Radiation is one-body molded with Ba Lun portion or fixedly connected; It is characterized in that described antenna oscillator also comprises for the coupling of described oscillator component and produce the parasitic element of secondary radiation; Described parasitic element comprises parasitic structure and following parasitic structure, describedly goes up the top that parasitic structure is arranged at described oscillator component, described parasitic structure down in the form of a ring, described following parasitic structure is placed in described oscillator component periphery; Described upward parasitic structure in the form of sheets.

2. antenna oscillator as claimed in claim 1, it is characterized in that, described Department of Radiation integrally casting takes shape in an end of described Ba Lun portion, the other end of described Ba Lun portion fixedly is welded in or is fixedly connected on described reflection part by locking member, described Department of Radiation comprises a plurality of radiating doublets, and each described radiating doublet circumferentially is spaced and is connected in the described Ba Lun portion.

3. antenna oscillator as claimed in claim 2 is characterized in that, described oscillator component is ± 45 ° of dual polarization cross oscillators, and described radiating doublet is tabular or ring-type.

4. antenna oscillator as claimed in claim 3 is characterized in that, described radiating doublet is tabular, vertical plate portion that it comprises the transverse plate part and is connected in described transverse plate part.

5. antenna oscillator as claimed in claim 4 is characterized in that, described transverse plate partly is the isosceles trapezoid shape, and its short base integrally casting takes shape in described Ba Lun portion, and described vertical plate portion integrally casting takes shape in the long base of described transverse plate part.

6. as each described antenna oscillator in the claim 1 to 5, it is characterized in that the described parasitic structure that goes up is tabular, described parasitic structure down in the form of a ring.

7. an antenna comprises feeding pack and reflection part, it is characterized in that, comprises that also described oscillator component is connected in described reflection part as each described antenna oscillator in the claim 1 to 6, and described feeding pack is connected in described oscillator component.

8. antenna as claimed in claim 7 is characterized in that, described Ba Lun portion is provided with for the separate slot that described Ba Lun portion is divided into a plurality of branches.

9. antenna as claimed in claim 8, it is characterized in that, described radiating doublet is provided with four, described separate slot is provided with two and described Ba Lun portion is divided into four branches, two described separate slot square crossings arrange, four described branches are respectively first branch, second branch, the 3rd branch and the 4th branch, and wherein said first branch and described the 3rd branch diagonal angle arrange, and described second branch and described the 4th branch diagonal angle arrange.

10. antenna as claimed in claim 9 is characterized in that, is provided with power feed hole in described first branch and second branch, is provided with balancing hole in described the 3rd branch and the 4th branch; Described feeding pack comprises two feed bodies, and described feed body comprises the feed dielectric body and is connected in the feed probes of described feed dielectric body; Wherein the feed dielectric body of a described feed body is arranged in the power feed hole of described first branch, and described feed probes is connected in described the 3rd branch or is connected on the radiating doublet in the 3rd branch; The feed dielectric body of another described feed body is arranged in the power feed hole of described second branch, and described feed probes is connected in described the 4th branch or is connected on the radiating doublet in the 4th branch, and the feed probes of two described feed bodies is crisscross arranged.

11. as each described antenna in the claim 7 to 10, it is characterized in that, a described reflection part and described oscillator component end in opposite directions is provided with reflection cavity, described reflection cavity is cambered surface or conical surface-shaped, the central authorities of described reflection cavity are provided with installing hole, and the other end of described Ba Lun portion inserts described installing hole and is fixedly connected on described reflection part.

12. as each described antenna in the claim 7 to 10, it is characterized in that, described to go up parasitic structure rectangular tabular and arrange with described oscillator component spacing, and described first support of parasitic structure by insulation of going up is connected in described oscillator component or described reflection part or installed surface.

13. as each described antenna in the claim 7 to 10, it is characterized in that, described parasitic structure down is the polygon ring-type and between described Department of Radiation and described reflecting part, described parasitic structure down is connected in described oscillator component or described reflection part or installed surface by second support of insulation.

14. as each described antenna in the claim 7 to 10, it is characterized in that the profile of described reflection part is square, the described parasitic structure that goes up is square, described two diagonal going up parasitic structure parallel with wherein two outer side edges of described reflection part; Described parasitic structure down is the octagon ring-type, and the four edges that described parasitic structure down is separated by parallels with four outer side edges of described reflection part.

15. antenna as claimed in claim 14 is characterized in that, the described parasitic structure lateral dimension of going up is less than the sectional dimension of described Department of Radiation; The interior ring size of described parasitic structure down is greater than the sectional dimension of Department of Radiation, and a described reflection part and described oscillator component end in opposite directions is provided with reflection cavity.

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