CN213660635U

CN213660635U - Broadband low-profile 4X4 array dual-polarized directional antenna

Info

Publication number: CN213660635U
Application number: CN202022114833.4U
Authority: CN
Inventors: 汪卫
Original assignee: Signal Plus Technology Co ltd
Current assignee: Signal Plus Technology Co ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-09
Anticipated expiration: 2030-09-24

Abstract

The utility model discloses a low section 4X4 array dual polarization directional aerial of wide band, including the antenna body, the antenna body includes the reflecting plate, high frequency medium base plate, circular pad post, the radiating element, the nut, coaxial cable and radio frequency connector, high frequency medium base plate installs the middle part directly over the reflecting plate, circular pad post is provided with a plurality of groups and evenly installs in the junction of high frequency medium base plate and reflecting plate, the radiating element branch is equipped with a plurality of groups and evenly sets up on circular pad post, the radiating element has all alternate the double-screw bolt with the junction of circular pad post, the nut screw thread is fixed in on the double-screw bolt and contacts with the radiating element, radiating element central current zero point carries out the short circuit with the reflecting plate, and the surface symmetry of radiating element has seted up windowing one and windowing two. The utility model discloses a carry out optimal design to antenna radiation unit, adopt to be different from traditional circular or square radiation paster, have the advantage of broadband, high isolation, high cross polarization ratio and low section.

Description

Broadband low-profile 4X4 array dual-polarized directional antenna

Technical Field

The utility model relates to a directional antenna technical field specifically is a low section 4X4 array dual polarization directional aerial of wide band.

Background

A directional antenna is an antenna that emits and receives electromagnetic waves in one or more specific directions with a high intensity, and emits and receives electromagnetic waves in other directions with a null or minimum intensity. The directional transmitting antenna is adopted to increase the effective utilization rate of the radiation power and increase the confidentiality; the main purpose of adopting the directional receiving antenna is to enhance the signal strength and increase the anti-interference capability, wherein the directional receiving antenna comprises a dual-polarized directional antenna, and the requirement for directional data transmission is increasing at present, so higher requirements are put forward on indexes such as gain, lobe width, isolation, cross polarization ratio and the like of the antenna. To design an 18dBi antenna, the horizontal lobe width and the vertical lobe width are both 17 degrees, and the antenna is generally in the form of an array antenna with 4 × 4 elements, the radiating elements of the antenna are generally circular or square, and the feeding network is generally fed in a manner of in-phase feeding.

However, the conventional 18dBi antenna design has the following problems in use: (1) the disadvantage of this method is that the antenna bandwidth is not enough, and the whole bandwidth of 5.15 GHz-5.85 GHz cannot be covered; (2) due to the in-phase feeding relationship, the isolation between the two ports is usually only about 15dB, which cannot meet the requirement of 20dB isolation required by the system, and cannot ensure that the cross polarization ratio reaches the requirement above 15 dB. Therefore, a plus-minus 45-degree dual-polarized low-profile antenna needs to be designed, and the problems that the bandwidth is insufficient, and indexes such as isolation and cross polarization ratio do not meet requirements can be solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low section 4X4 array dual polarization directional aerial of broadband, it is not enough to have solved the antenna bandwidth, can't cover 5.15GHz ~ 5.85GHz whole bandwidth, moreover because the relation of homophase feed, isolation between two ports often only about 15dB, can't satisfy the requirement of the 20dB isolation of system's demand, also can't guarantee the requirement that cross polarization ratio reaches more than 15dB, this technical problem.

In order to achieve the above object, the utility model provides a following technical scheme: a broadband low-profile 4X4 array dual-polarized directional antenna comprises an antenna body, wherein the antenna body comprises a reflecting plate, a high-frequency medium substrate, a circular pad column, a radiation unit, a nut, a coaxial cable and a radio frequency connector, the high-frequency medium substrate is installed in the middle of the position right above the reflecting plate, the circular pad column is provided with a plurality of groups and is uniformly installed at the joint of the high-frequency medium substrate and the reflecting plate, the radiation unit is respectively provided with a plurality of groups and is uniformly arranged on the circular pad column, the joint of the radiation unit and the circular pad column is provided with a stud in a penetrating manner, the nut is in threaded fixation on the stud and is in contact with the radiation unit, the central current zero point of the radiation unit is in short circuit with the reflecting plate, the surface of the radiation unit is symmetrically provided with a first opening window and a second opening, the first opening and the second opening are respectively provided with a positive 45-degree polarization feed point and a, the high-frequency dielectric substrate is characterized in that a plurality of groups of bonding pads are uniformly arranged on the high-frequency dielectric substrate, the lower ends of the positive 45-degree polarization feeding point and the negative 45-degree polarization feeding point are welded on the surfaces of the two adjacent groups of bonding pads, the coaxial cables are respectively provided with two groups and are respectively arranged at the upper end and the lower end of the back surface of the reflecting plate, the feeding point and the grounding point are welded at the joint of the inner end of the coaxial cable and the high-frequency dielectric substrate, and the radio-frequency connector is respectively provided with two groups and is respectively welded.

As a preferred embodiment of the present invention, 16 sets of circular pad columns, radiation units, studs and nuts are installed correspondingly, and a plurality of sets of radiation units are distributed in a 4X4 array.

As a preferred embodiment of the present invention, the circular pad column is of a cylindrical structure and has a height of 2.5mm, and the upper end of the circular pad column contacts with the back of the radiation unit.

As a preferred embodiment of the present invention, the radiation unit includes a main surface and a plurality of sets of bumps formed on the periphery of the main surface, each of the main surface has two sets of bumps formed thereon, and the periphery of the bump has an arc-shaped structure.

As a preferred embodiment of the utility model, adjacent two sets of be formed with the notch between the lug, the inner wall of notch is ARC structure.

As a preferred embodiment of the utility model, window one and window two be located the upper left corner and the upper right corner of radiating element respectively and be 45 degrees angles and 135 degrees angles respectively.

As an optimal implementation mode of the utility model, the window one and the window two all are the rectangle structure.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a carry out optimal design to antenna radiation unit, adopt to be different from traditional circular or square radiation paster, have the advantage of broadband, high isolation, high cross polarization ratio and low section. Meanwhile, the structure is stable, the assembly is easy, the working hours and the cost can be reduced, the consistency is high, the mass production is convenient, and the market prospect is good.

2. The utility model discloses a structure has the characteristics that the size is little, the stability performance is high and general type is high, conveniently constitutes and installs.

Drawings

FIG. 1 is a front view of the whole structure of the present invention;

FIG. 2 is a view of the overall back structure of the present invention;

fig. 3 is a side view of the whole structure of the present invention.

In the figure, 1, a reflecting plate; 2. a high-frequency dielectric substrate; 3. a circular pad post; 4. a radiation unit; 5. a nut; 6. a coaxial cable; 7. a radio frequency connector; 8. a main face; 9. a bump; 10. a notch; 11. a stud; 21. A pad; 23. a feed point; 24. a ground point; 41. a positive 45 degree polarized feed point; 42. a negative 45 degree polarized feed point; 43. opening a window I; 44. and opening a second window.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a broadband low-profile 4X4 array dual-polarized directional antenna comprises an antenna body, wherein the antenna body comprises a reflecting plate 1, a high-frequency dielectric substrate 2, a circular pad column 3, radiation units 4, nuts 5, coaxial cables 6 and a radio frequency connector 7, the high-frequency dielectric substrate 2 is arranged in the middle of the position right above the reflecting plate 1, the circular pad column 3 is provided with a plurality of groups and is uniformly arranged at the joint of the high-frequency dielectric substrate 2 and the reflecting plate 1, the radiation units 4 are respectively provided with a plurality of groups and are uniformly arranged on the circular pad column 3, studs 11 are respectively inserted at the joints of the radiation units 4 and the circular pad column 3, the nuts 5 are fixed on the studs 11 in a threaded manner and are in contact with the radiation units 4, the center current zero point of the radiation units 4 is in short circuit with the reflecting plate 1, window one 43 and window two 44 are symmetrically arranged on the surface of the radiation units 4, the window one 43 and the window two 44 are respectively provided with a positive 45-degree polarized feed point and a, still evenly install a plurality of groups of pad 21 on the high frequency dielectric substrate 2, the lower extreme of positive 45 degrees polarization feed point and negative 45 degrees polarization 42 feed point welds in the surface of two sets of adjacent pad 21, coaxial cable 6 divide be equipped with two sets ofly and install respectively in the upper and lower both ends at the reflecting plate 1 back, coaxial cable 6's the inner and the junction welding of high frequency dielectric substrate 2 have feed point 23 and ground point 24, radio frequency connector 7 divides to be equipped with two sets ofly and welds respectively in the outer end of two sets of coaxial cable 6.

Further improved, as shown in fig. 1: the circular pad columns 3, the radiation units 4, the studs 11 and the nuts 5 are correspondingly provided with 16 groups, and a plurality of groups of radiation units 4 are distributed in a 4X4 array.

In a further improvement, as shown in fig. 3: the circular cushion column 3 is of a columnar structure and 2.5mm in height, and the upper end of the circular cushion column 3 is in contact with the back of the radiation unit 4.

Further improved, as shown in fig. 1: the radiating element 4 comprises a main surface 8 and a plurality of groups of bumps 9 formed on the periphery of the main surface 8, wherein each surface of the main surface 8 is provided with two groups of bumps 9, and the periphery of each bump 9 is of an arc-shaped structure.

Further improved, as shown in fig. 1: a notch 10 is formed between two adjacent groups of the convex blocks 9, and the inner wall of the notch 10 is of a cambered surface structure.

Further improved, as shown in fig. 1: the first opening 43 and the second opening 44 are respectively positioned at the upper left corner and the upper right corner of the radiation unit 4 and respectively form an angle of 45 degrees and an angle of 135 degrees.

Specifically, the first opening 43 and the second opening 44 are both rectangular.

When in use: the utility model discloses this antenna has 7 parts to constitute: the high-frequency dielectric substrate with the feed network corresponds to the reflector 1, the high-frequency dielectric substrate with the feed network corresponds to the reflector 2, the circular pad column corresponds to the circular pad column 3, the radiating unit corresponds to the radiating unit 4, the nut corresponds to the nut 5, the coaxial cable corresponds to the coaxial cable 6, the radio-frequency connector corresponds to the radio-frequency connector 7, the high-frequency dielectric substrate with the feed network 2 is positioned and fixed above the reflector 1 through 16 studs 11 on the reflector 1, 16 circular pad columns 3 with the height of 2.5mm are also padded on the high-frequency dielectric substrate 2, 16 radiating units are arranged on the circular pad columns 3 and are positioned and fixed through 16 studs 11 on the reflector 1 and then fixed through 16 nuts 5, so that the reflector 1, the reflector 2, the reflector 3 and the reflector 4 are fixedly connected through 11, the zero point of the central current of the radiating unit 4 is in short circuit with the ground of the reflector, and the lightning protection effect can be achieved, the positive and negative 45-degree

polarization feeding points

41 and 42 on the radiating unit 4 are connected with the welding pads 21 and 22 on the feeding network on the high-frequency dielectric substrate in a welding mode, the coaxial cable 6 is connected with the feeding network on the high-frequency dielectric substrate 2 in a welding mode with the feeding point 23 and the grounding point 24, signal transmission can be achieved, the radio frequency connector 7 is connected with the coaxial cable 6 through a welding process, signals are input into the feeding network through the coaxial cable 6 and the feeding point 23 on the feeding network through the radio frequency connector 7, the signals are transmitted to the

radiating units

4 and 5 of the antenna through distribution of power and phases of the feeding network, and high-frequency current is converted into electromagnetic wave to be radiated.

The shape of the radiation unit 4 is not a traditional circle or a square, and is optimized on the basis of the square, and due to the existence of the

windows

43 and 44, the current trend is changed, the bandwidth of the antenna is widened, the isolation between ports is improved, and the cross polarization ratio is improved. Since the height of the pad post 3 is only 2.5mm, the height of the whole antenna is low, which has the advantage of low profile. In addition, the connection part of the radiation patch and the feed point is made into a whole, so that the assembly is greatly facilitated, the structure is stable, and the consistency is good.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A broadband low-profile 4X4 array dual-polarized directional antenna comprises an antenna body, and is characterized in that: the antenna body comprises a reflecting plate (1), a high-frequency medium substrate (2), a circular pad column (3), a radiation unit (4), a nut (5), a coaxial cable (6) and a radio frequency connector (7), wherein the high-frequency medium substrate (2) is arranged in the middle part right above the reflecting plate (1), the circular pad column (3) is provided with a plurality of groups and is uniformly arranged at the joint of the high-frequency medium substrate (2) and the reflecting plate (1), the radiation unit (4) is respectively provided with a plurality of groups and is uniformly arranged on the circular pad column (3), studs (11) are respectively inserted at the joint of the radiation unit (4) and the circular pad column (3), the nut (5) is fixed on the studs (11) in a threaded manner and is in contact with the radiation unit (4), the central current zero point of the radiation unit (4) is in short circuit with the reflecting plate (1), and a first window opening (43) and a second window opening (44) are symmetrically arranged on the surface of the radiation unit (4), the utility model discloses a radio frequency connector, including windowing one (43) and windowing two (44), install respectively 45 degrees polarization feed points and the cooperation negative 45 degrees polarization (42) feed point that uses, still evenly install a plurality of groups pad (21) on high frequency dielectric substrate (2), the lower extreme of 45 degrees polarization feed points and negative 45 degrees polarization (42) feed points welds in the surface of adjacent two sets of pad (21), coaxial cable (6) branch is equipped with two sets ofly and installs respectively in the upper and lower both ends at reflecting plate (1) back, the inner of coaxial cable (6) and the junction welding of high frequency dielectric substrate (2) have feed point (23) and ground point (24), radio frequency connector (7) branch is equipped with two sets ofly and welds respectively in the outer end of two sets of coaxial cable (6).

2. The broadband low-profile 4X4 array dual-polarized directional antenna defined by claim 1, wherein: 16 groups of circular pad columns (3), radiation units (4), studs (11) and nuts (5) are correspondingly arranged, and a plurality of groups of radiation units (4) are distributed in a 4X4 array.

3. The broadband low-profile 4X4 array dual-polarized directional antenna defined by claim 2, wherein: circular pad post (3) are column structure and highly are 2.5mm, the upper end of circular pad post (3) contacts with the back of radiating element (4).

4. The broadband low-profile 4X4 array dual-polarized directional antenna defined by claim 3, wherein: radiating element (4) include principal plane (8) and machine-shaping in a plurality of groups lug (9) of principal plane (8) periphery, every face of principal plane (8) all machine-shaping has two sets of lugs (9), the periphery of lug (9) is the arc structure.

5. The broadband low-profile 4X4 array dual-polarized directional antenna defined by claim 4, wherein: a notch (10) is formed between every two adjacent groups of the lugs (9), and the inner wall of each notch (10) is of an arc surface structure.

6. The broadband low-profile 4X4 array dual-polarized directional antenna defined by claim 4, wherein: the first window (43) and the second window (44) are respectively positioned at the upper left corner and the upper right corner of the radiation unit (4) and are respectively at an angle of 45 degrees and an angle of 135 degrees.

7. The broadband low-profile 4X4 array dual-polarized directional antenna defined in claim 6, wherein: the first windowing part (43) and the second windowing part (44) are both rectangular structures.