CN216389712U

CN216389712U - Dual-polarized double-wide-surface low-cross polarization filter antenna

Info

Publication number: CN216389712U
Application number: CN202123287578.4U
Authority: CN
Inventors: 孙丽; 魏信辉; 王宗坤; 夏晨硕; 洪何知; 付香芽
Original assignee: Ndk Kunshan Co ltd
Current assignee: Ndk Kunshan Co ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-04-26
Anticipated expiration: 2031-12-24

Abstract

The utility model provides a double polarization's two broadsides low cross polarization filter antenna, includes that the merit divides the base plate, is equipped with the feed structure that constitutes by two N type feeder vertical crossings on it, and the outside of every N type feeder all corresponds and is equipped with two radiation patches, is equipped with the horizontal coupling paster between the adjacent radiation patch, and the tip outside of every radiation patch all is equipped with perpendicular coupling paster. According to the utility model, the vertical coupling patch is loaded on the periphery of the radiation patch, and the radiation patch radiates outwards after being used as single dipole coupling energy and is complementary with the radiation of the antenna main body, so that the E-plane and H-plane half-power beam widths of the antenna can be effectively widened; generating a current opposite to that on the radiating patches to realize a trap function by loading horizontal coupling patches between adjacent radiating patches; the horizontal coupling patch is grooved to generate a plurality of pairs of currents with opposite directions, and the currents are mutually offset to realize a trap function; high cross-polarization is achieved by equal reverse currents generated at the horizontally coupled patches near the un-excited radiating patches.

Description

Dual-polarized double-wide-surface low-cross polarization filter antenna

Technical Field

The utility model relates to the technical field of antennas suitable for a wireless broadband communication system, in particular to a dual-polarized double-wide-surface low-cross polarization filter antenna.

Background

In 11 months in 2017, the ministry of industry and communications in China formally released the microwave frequency standard (3.3-3.6 GHz; 4.8-5GHz) of the fifth generation mobile communication system (5G), and established the low-frequency band spectrum resource of 5G communication; in 2019, in 6 months, the Ministry of industry and communications issued 5G commercial license plates to four enterprises of China telecom, China Mobile, China Unicom and China radio and television, and the preface screen marking 5G commercial is officially pulled open. The 5G communication system needs to have performance characteristics such as high-speed data transmission, multi-dimensional wide coverage, high integration and the like, and thus, more rigorous requirements are put on the 5G antenna than the conventional antenna. Firstly, a micro base station in a fifth generation mobile communication system is an important component, so that higher requirements are put on the volume of a 5G antenna; meanwhile, the dual-polarized antenna and the wide-coverage-surface antenna can reduce the number of units of the base station antenna, effectively improve the channel capacity of the antenna, are key technologies for reducing the construction cost of the base station and improving the transmission capacity of the antenna, and the 5G antenna tends to have characteristics of multi-polarization, wide coverage and the like; moreover, to meet the increasing communication demands and diversified application scenarios, large-scale antenna arrays are also the key direction of the current development.

With the continuous development of the information era, the intelligent terminal and various wireless data services have been increased explosively, which puts more severe requirements on the fifth generation mobile communication system, in order to meet the requirements of faster communication speed and larger communication capacity of the system, the novel 5G antenna needs to be able to cover wider working frequency band, higher radiation gain, multi-polarization function, etc., so that the antenna can provide high-speed and stable information transmission for more devices, while the most direct and effective method is to increase the polarization mode of the antenna undoubtedly, the increase of the polarization mode can increase the channel capacity of the communication system by multiples, so the multi-polarization will be the standard configuration of the 5G antenna. On the other hand, the beam width of the antenna is also important. In a communication system, under the premise that good directional radiation characteristics and normal radiation gain of an antenna are kept in a plurality of scenes, the coverage area of the antenna is as wide as possible, the antenna comprises various satellite-borne and ship-borne antennas used for positioning, navigation, time service and the like, and the beam of the terminal antenna is required to be covered in a hemispherical manner in order to reduce the requirement of the antenna on elevation angle; massive MIMO, beam forming, large-scale phased array and the like which are to be used in a large scale in a 5G system have certain requirements on the beam width of an antenna unit, so that the research on the dual-polarized wide-beam coverage antenna in a 5G frequency band has profound practical significance.

In a fifth generation mobile communication system, due to the nature of a 5G working frequency band, 5G signals are greatly influenced by atmosphere and urban buildings, so that the micro base station position in the base station layout of the fifth generation mobile communication system is important, and meanwhile, a large amount of large-scale antenna arrays are also applied to 5G; however, because the space of the micro base station is limited, the volume of the existing antenna is relatively large, and cannot meet the requirements of a new generation of communication system, so that the volume of the 5G antenna needs to be reduced as much as possible while the high performance of the antenna is ensured.

The wide-coverage antenna can use fewer antenna units to cover a larger radiation range under the same condition, so that the using number of the antennas is reduced, and the cost is reduced. The common method for increasing the radiation surface generally needs to bend and enlarge a radiation patch or a reflection floor, so that the manufacturing difficulty and cost of the antenna are increased; in addition, the energy distribution of the wide-coverage-surface antenna is in a wider range, which inevitably leads to the reduction of the antenna gain, and the difficulty is to ensure that the antenna gain meets the requirements while realizing the wide radiation coverage surface.

For the integrated design of microstrip antenna and filter, many design techniques are reported at home and abroad. In the early days, researchers can load an impedance converter between an antenna and a filter to realize the integration of the antenna and the filter, but the size of the antenna is larger, and extra transmission loss is added due to the introduction of the impedance converter, so the efficiency of the antenna is lower, or the design technology of replacing the last stage resonator of the filter by the antenna can be adopted, but the plane of the design corresponding to the technology is loaded with a multi-stage resonator to occupy larger plane size of the antenna, and the structure always has resonators which do not participate in radiation, so the gain and the efficiency are still reduced compared with the antenna, and therefore some modes which can directly increase a small amount of structures on the antenna main body to realize the filtering effect need to be studied.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model aims to provide a dual-polarized double-wide-surface low-cross polarization filter antenna.

In order to achieve the above objects and other related objects, the present invention provides the following technical solutions: the utility model provides a double polarization's two broadsides low cross polarization filter antenna, includes that the merit divides the base plate, the merit is divided and is equipped with feed structure on the base plate, feed structure comprises two vertical crossings of N type feeder, every the outside of N type feeder all corresponds and is equipped with two radiation patches, and is adjacent be equipped with the horizontal coupling paster between the radiation patch, every the tip outside of radiation patch all is equipped with perpendicular coupling paster.

The preferable technical scheme is as follows: the N-type feeder includes a vertical portion and a horizontal portion, and a width of the horizontal portion is smaller than a width of the vertical portion.

The preferable technical scheme is as follows: the radiation patch comprises a support part and a radiation part, wherein the radiation part is of an I-shaped structure, an earth-shaped structure, a Chinese character-like structure or a cross-shaped structure.

The preferable technical scheme is as follows: the horizontal portion has a height lower than that of the radiation portion.

The preferable technical scheme is as follows: the horizontal coupling patch is of a triangular structure and is fixed on the power distribution substrate through a plastic support, and an I-shaped groove, a T-shaped groove or a cross-shaped groove is formed in the horizontal coupling patch.

The preferable technical scheme is as follows: and bayonets for mounting the N-type feeder line, the radiation patch and the vertical coupling patch are arranged on the power distribution substrate.

The preferable technical scheme is as follows: and a power distribution circuit is arranged on the power distribution substrate and is connected with the N-type feeder line.

Due to the application of the technical scheme, the utility model has the beneficial effects that:

the whole dual-polarized double-wide-surface low-cross polarization filter antenna provided by the utility model is directly spliced by copper sheets, the manufacture is simple, easy and quick, the structure of a finished product is stable, the cost is low, and a novel 5G antenna can be manufactured efficiently and at low cost; four vertical rectangular coupling patches are loaded on the periphery of the radiation patch, and the radiation patch radiates outwards after being used as single dipole coupling energy, and the radiation patch is complementary with the radiation of the antenna main body, so that the half-power beam width of the E surface and the H surface of the antenna can be effectively widened. Four triangular coupling patches are loaded among the antenna radiation patches to generate current opposite to that on the radiation patches so as to realize a trap function. The four triangular coupling patches are grooved to generate a plurality of pairs of currents with opposite directions, and the currents are mutually offset to realize a trap function. By loading four triangular coupling patches among the antenna radiation patches, high cross polarization is realized by equal reverse currents generated near the unexcited radiation patches. A1 x 3 linear antenna array is designed through a one-to-three feed network, and the H surface has a wider half-power beam width and higher gain.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a radiation patch according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a horizontal coupling piece according to an embodiment of the utility model.

Fig. 4 is a schematic structural diagram of an N-type feeder according to an embodiment of the present invention.

FIG. 5 is a schematic structural diagram of another N-type feed line according to an embodiment of the present invention.

FIG. 6 is a graph of the S parameter and gain curve of the cell of the present invention.

Fig. 7 is a cell wide H-plane radiation pattern of an embodiment of the present invention.

FIG. 8 is a graph of S-parameters and gain curves of a 1 × 3 array according to an embodiment of the present invention.

Fig. 9 is a 1 × 3 array wide H-plane radiation pattern according to an embodiment of the present invention.

In the above drawings, 1, a power division substrate; 2. an N-type feeder; 21. a first N-type feeder; 22. a second N-type feeder; 3. a radiation patch; 31. a support portion; 32. a radiation section; 4. a horizontally coupled patch; 41. a T-shaped groove; 5. a vertical coupling patch; 6. a plastic support.

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

Please refer to fig. 1-9. It should be understood that in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the products of the present invention are usually placed in when used, which is only for the convenience of describing the present invention and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

as shown in fig. 1, the utility model provides a dual-polarized dual-wide-area low cross polarization filtering antenna.

The antenna comprises a power division substrate 1, wherein a feeding structure formed by vertically crossing two N-type feeder lines 2 is arranged on the power division substrate 1, each N-type feeder line comprises a first N-type feeder line 21 and a second N-type feeder line 22, each N-type feeder line comprises two vertical parts and a horizontal part, and when the first N-type feeder line 21 and the second N-type feeder line 22 vertically cross, the horizontal parts are partially overlapped. The width of the horizontal part is designed to be smaller than that of the vertical part so as to reduce energy coupling between the two feeder lines and improve the isolation of the antenna.

The radiation patch 3 is arranged on the outer side of the vertical part of the first N-type feeder line and the vertical part of the second N-type feeder line, the radiation patch 3 is of an inverted L shape and comprises a support part 31 and a radiation part 32, the support part 31 and the vertical part are correspondingly arranged, and the height of the horizontal part is lower than that of the radiation part 32. The radiating portion 32 is of an I-shaped structure, an earth-shaped structure, a Chinese character-like structure or a cross-shaped structure, so that the length of current is increased, impedance matching is facilitated, and the size of the antenna can be reduced on the premise of ensuring the radiation characteristic of the antenna.

Be equipped with horizontal coupling paster 4 between adjacent radiation paster 3, horizontal coupling paster 4 is the triangle-shaped structure (the shape of horizontal coupling paster can be adjusted according to the electrical property needs) and is fixed in on the power division base plate 1 through plastics pillar 6, is equipped with I type groove or T type groove 41 or cross type groove on the horizontal coupling paster 4 to produce the electric current of opposite direction, thereby the electric current offsets each other and realizes the trapped wave function.

The outer side of the end part of each radiation patch 4 is provided with a vertical coupling patch 5, the four vertical coupling patches 5 work as four single dipole antennas, and the generated radiation pattern is fused with the pattern generated by the antenna main body, so that the effects of a wide H surface and a wide E surface are generated. The width and length of the vertical coupling patches 5 can be adjusted according to the electrical performance requirements.

The power distribution substrate 1 is provided with bayonets for installing the N-type feeder 2, the radiation patches 3 and the vertical coupling patches 5, and assembly is convenient. The power distribution substrate 1 is provided with a power distribution line, and the power distribution line is connected with the N-type feeder 2 to provide energy for the antenna unit.

Therefore, the utility model has the following advantages:

according to the utility model, the vertical coupling patch is loaded on the periphery of the radiation patch, and the radiation patch radiates outwards after being used as single dipole coupling energy and is complementary with the radiation of the antenna main body, so that the E-plane and H-plane half-power beam widths of the antenna can be effectively widened; generating a current opposite to that on the radiating patches to realize a trap function by loading horizontal coupling patches between adjacent radiating patches; the horizontal coupling patch is grooved to generate a plurality of pairs of currents with opposite directions, and the currents are mutually offset to realize a trap function; high cross-polarization is achieved by equal reverse currents generated at the horizontally coupled patches near the un-excited radiating patches.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the utility model. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The utility model provides a double-polarized two wide-face low cross polarization filter antenna, includes that the merit divides the base plate, the merit is divided and is equipped with feed structure on the base plate, feed structure comprises the vertical alternately of two N type feeders, every the outside of N type feeder all corresponds and is equipped with two radiation patches, its characterized in that: and horizontal coupling patches are arranged between the adjacent radiation patches, and a vertical coupling patch is arranged on the outer side of the end part of each radiation patch.

2. A dual polarized double-wide low cross-polarization filter antenna according to claim 1, wherein: the N-type feeder includes a vertical portion and a horizontal portion, and a width of the horizontal portion is smaller than a width of the vertical portion.

3. A dual polarized double-wide low cross-polarization filter antenna according to claim 2, wherein: the radiation patch comprises a support part and a radiation part, wherein the radiation part is of an I-shaped structure, an earth-shaped structure, a Chinese character-like structure or a cross-shaped structure.

4. A dual polarized double-wide low cross-polarization filter antenna according to claim 3, wherein: the horizontal portion has a height lower than that of the radiation portion.

5. A dual polarized double-wide low cross-polarization filter antenna according to claim 1, wherein: the horizontal coupling patch is of a triangular structure and is fixed on the power distribution substrate through a plastic support, and an I-shaped groove, a T-shaped groove or a cross-shaped groove is formed in the horizontal coupling patch.

6. A dual polarized double-wide low cross-polarization filter antenna according to claim 1, wherein: and bayonets for mounting the N-type feeder line, the radiation patch and the vertical coupling patch are arranged on the power distribution substrate.

7. A dual polarized double-wide low cross-polarization filter antenna according to claim 1, wherein: and a power distribution circuit is arranged on the power distribution substrate and is connected with the N-type feeder line.