CN115954649A - Multi-resonance-point broadband +/-45-degree dual-polarized antenna - Google Patents
Multi-resonance-point broadband +/-45-degree dual-polarized antenna Download PDFInfo
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- CN115954649A CN115954649A CN202310225474.5A CN202310225474A CN115954649A CN 115954649 A CN115954649 A CN 115954649A CN 202310225474 A CN202310225474 A CN 202310225474A CN 115954649 A CN115954649 A CN 115954649A
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Abstract
The invention relates to a multi-resonance-point broadband +/-45-degree dual-polarized antenna, which belongs to the technical field of communication and comprises a radiation substrate, wherein a parasitic patch is arranged on the lower surface of the radiation substrate, a main radiation patch is arranged on the upper surface of the radiation substrate, a first open slot penetrating through the radiation substrate is formed in the middle of the main radiation patch, one end of a feed structure is connected with the main radiation patch through the first open slot, the other end of the feed structure penetrates through a second open slot formed in a metal floor to be fixed on the metal floor, and electromagnetic energy is coupled among the main radiation patches, the main radiation patch, the parasitic patch and the parasitic patch, so that the antenna generates 3 resonance points in a working frequency band. The parasitic patch is added, so that the antenna generates three resonance points in a working frequency band, S11 in the frequency band between the resonance points is less than-14 dB, and the bandwidth is 1.72-3.45GHz; the whole structure is simple, the geometric parameters are less, and the optimization tuning is convenient.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a multi-resonance-point broadband +/-45-degree dual-polarized antenna.
Background
With the rapid development of mobile communication technology, data configured by mobile communication equipment is increasing day by day, users have higher requirements on the data transmission rate and delay of mobile communication, and a dual-polarized antenna is an important component of an outdoor base station, so that the base station simultaneously covers various mobile communication system frequency bands and is required to have a wider working frequency band.
At present, a common dual-polarized base station antenna usually adopts an annular radiation structure to realize broadband work, and the expansion of the work bandwidth is realized by adding a parasitic structure on the basis of the annular radiation structure, but in the existing technical scheme of expanding the bandwidth by using the parasitic structures of other layers, a metal sheet and a radiation substrate are not on the same plane, and an additional support structure is needed, so that the overall structure is relatively complex, and the bandwidth expansion degree is limited.
It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a multi-resonance-point broadband +/-45-degree dual-polarized antenna and overcomes the defects of the conventional dual-polarized base station antenna.
The purpose of the invention is realized by the following technical scheme: the utility model provides a many resonance points broadband 45 dual polarized antenna, it includes the radiation base plate the lower surface of radiation base plate is provided with parasitic patch the upper surface of radiation base plate is provided with main radiation patch the positive centre of main radiation patch is seted up and is run through the first fluting of radiation base plate, and feed structure's one end is connected with main radiation patch through first fluting, and the other end passes and sets up on the fixed metal floor of second fluting on the metal floor, and electromagnetic energy is between main radiation patch, between main radiation patch and the parasitic patch and between the parasitic patch coupling, makes the antenna produce 3 resonance points in operating band.
The main radiation patch comprises four patch strips, the four patch strips are located on the diagonal line of the radiation substrate and form a main radiation patch with a cross structure, a cross gap I is formed between the four patch strips, a first groove penetrating through the radiation substrate is formed in each patch strip, and the four patch strips are coupled to generate a resonance point.
The parasitic patches comprise eight triangular patches, two triangular patches are arranged in the upper, lower, left and right directions of the lower surface of the radiating substrate, and the two triangular patches in each direction are arranged at the included angle between the two patch strips; a gap is reserved between the two triangular patches in each direction, a cross-shaped gap II is formed between the gaps between the two triangular patches in the four directions, the cross-shaped gap II and the cross-shaped gap I are in up-down corresponding relation, coupling among patch strips is increased through the triangular patches, and in-band impedance matching is improved. The triangular patch is used as a high-frequency radiating unit to generate a new resonance point.
The feed structure comprises a first feed balun and a second feed balun which are orthogonal, one end of the first feed balun and one end of the second feed balun are connected with the patch strip through the first open groove, and the other end of the first feed balun and the other end of the second feed balun penetrate through the second open groove formed in the metal floor to be fixed on the metal floor.
The invention has the following advantages: a multi-resonance point broadband +/-45-degree dual-polarized antenna is characterized in that a parasitic patch is added, so that the antenna generates three resonance points in a working frequency band, S11 in the frequency band between the resonance points is smaller than-14 dB, and the bandwidth is 1.72-3.45GHz; the whole structure is simple, the geometric parameters are less, and the optimization tuning is convenient.
Drawings
FIG. 1 is a schematic three-dimensional structure of the present invention;
FIG. 2 is a schematic illustration of an explosive structure according to the present invention;
FIG. 3 is a top view of a radiating substrate;
FIG. 4 is a schematic view of the bottom surface of the radiating substrate;
FIG. 5 is a schematic view of a metal floor;
fig. 6 is a schematic diagram of S parameters of a broadband dual-polarized antenna;
FIG. 7 is a comparison graph of S parameters for the presence or absence of a parasitic structure on a radiation substrate;
FIG. 8 is a graph of antenna peak gain versus frequency;
fig. 9 antenna radiation patterns;
in the figure: the antenna comprises a main radiating patch 1, a parasitic patch 2, a radiating substrate 3, a first notch 31, a first feed structure 4, a first feed balun 41, a second feed balun 42, a metal floor 5, a second notch 51, a patch strip 6, a cross-shaped gap I7, a triangular patch 8 and a cross-shaped gap II 9.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the present application provided below in connection with the appended drawings is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application. The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the invention specifically relates to a multi-resonance point broadband ± 45 ° dual polarized antenna, which works at 1.72GHz-3.45GHz, and comprises a radiation substrate 3, a parasitic patch 2 is arranged on the lower surface of the radiation substrate 3, a main radiation patch 1 is arranged on the upper surface of the radiation substrate 3, a first slot 31 penetrating through the radiation substrate 3 is arranged in the middle of the main radiation patch 1, one end of a feed structure 4 is connected with the main radiation patch 1 through the first slot 31, the other end of the feed structure passes through a second slot 51 arranged on a metal floor 5 and is fixed on the metal floor 5, and electromagnetic energy is coupled among the main radiation patches 1, between the main radiation patch 1 and the parasitic patch 2, and between the parasitic patches 2, so that the antenna generates 3 resonance points in a working frequency band, and the working bandwidth is expanded.
As shown in fig. 3 and 4, the main radiation patch 1 includes four patch strips 6, the four patch strips 6 are located on a diagonal line of the radiation substrate 3, the four patch strips form the main radiation patch 1 with a cross structure, a cross gap 7 is formed between the four patch strips 6, each patch strip 6 is provided with a first slot 31 penetrating through the radiation substrate 3, and the four patch strips 6 are coupled to generate a resonance point.
Further, the parasitic patches 2 include eight triangular patches 8, two triangular patches 8 are arranged in the upper, lower, left and right directions of the lower surface of the radiation substrate 3, and the two triangular patches 8 in each direction are arranged at the included angle between the two patch strips 6; a gap is reserved between the two triangular patches 8 in each direction, a cross-shaped gap II 9 is formed by the gaps between the two triangular patches 8 in the four directions, the cross-shaped gap II 9 and the cross-shaped gap I7 are in up-down corresponding relation, and the triangular patches 8 are coupled to generate a resonance point.
Further, as shown in fig. 5, the feeding structure 4 includes two orthogonal first feeding balun 41 and second feeding balun 42, one end of the first feeding balun 41 and one end of the second feeding balun 42 are connected to the patch strip 6 through the first slot 31, and the other end passes through the second slot 51 opened on the metal floor 5 and is fixed on the metal floor 5; electromagnetic energy is further coupled to eight triangular patches 8 after being transmitted to the main radiating patch 1 through two baluns, and the main radiating patch 1 and the parasitic patch 2 commonly radiate the electromagnetic energy outwards.
The main radiation patch 1 and the parasitic patch 2 have simple structures, less geometric parameters and convenient optimized tuning, the first feed balun 41 and the second feed balun 42 which are perpendicular and orthogonal to each other pass through the first slot 31 to respectively excite two polarization modes of the antenna, and higher polarization isolation (more than 22 dB) is ensured.
As shown in fig. 7, the S11 parameter comparison of the antenna without the parasitic patch 2 and the antenna proposed by the present invention is shown. It can be seen that, without the parasitic patch 2, the antenna has only two resonance points, and the frequency band S11 between the resonance points is greater than-14 dB, which does not meet the specification requirement of the base station antenna. After the parasitic patch 2 is added, the antenna generates three resonance points (1.83 GHz, 2.76GHz and 3.37 GHz) in an operating frequency band, and S11 in the frequency band between the resonance points is smaller than-14 dB. FIG. 6 shows the S parameters of the antenna provided by the invention, S11< -14dB and S21 is less than-22 dB in 1.72-3.45GHz (67%), and the working bandwidth is wider than that of a common dual-polarized base station antenna (about 45%).
As shown in fig. 8 and 9, the radiation characteristics of the antenna are shown, the in-band peak gain is higher than 6.1dBi, and the radiation performance is good.
The invention utilizes the coupling between the parasitic patch 2 and the main radiating patch 1 to improve the impedance matching, utilizes the parasitic patch 2 as a high-frequency radiating unit, generates 3 resonance points in a working frequency band, and realizes a broadband (67%, S11< -14 dB) antenna. Two orthogonal polarizations are excited respectively by two orthogonally placed baluns, and high isolation is achieved (the in-band isolation is higher than 22 dB). The antenna has simple geometric topology and less size parameters, and is convenient to optimize and tune according to actual requirements. The PCB where the two feeding baluns are located plays a role in supporting and fixing the antenna radiation PCB when feeding the antenna, so that the whole structure of the antenna has stability. And finally, the antenna can be directly connected with the coaxial line for feeding, and the antenna is simple in structure and convenient to use in practice.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and is not to be construed as limited to the exclusion of other embodiments, and that various other combinations, modifications, and environments may be used and modifications may be made within the scope of the concepts described herein, either by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A multi-resonance point broadband +/-45-degree dual-polarized antenna is characterized in that: it includes radiation substrate (3) the lower surface of radiation substrate (3) is provided with parasitic patch (2) the upper surface of radiation substrate (3) is provided with main radiation patch (1) set up in the middle of the centre of main radiation patch (1) and run through first fluting (31) of radiation substrate (3), the one end of feed structure (4) is connected with main radiation patch (1) through first fluting (31), and the other end passes and sets up on fixed metal floor (5) of second fluting (51) on metal floor (5), and electromagnetic energy is between main radiation patch (1), between main radiation patch (1) and parasitic patch (2) and the coupling between parasitic patch (2), makes the antenna produce 3 resonance points in operating band.
2. A multi-resonance point broadband ± 45 ° dual polarized antenna according to claim 1, wherein: the main radiation patch (1) comprises four patch strips (6), wherein the four patch strips (6) are positioned on the diagonal line of the radiation substrate (3) to form the main radiation patch (1) with a cross structure, a cross gap I (7) is formed between the four patch strips (6), a first slot (31) penetrating through the radiation substrate (3) is formed in each patch strip (6), and the four patch strips (6) are coupled to generate a resonance point.
3. A multi-resonance point broadband ± 45 ° dual polarized antenna according to claim 2, wherein: the parasitic patch (2) comprises eight triangular patches (8), two triangular patches (8) are arranged in the upper, lower, left and right directions of the lower surface of the radiation substrate (3), and the two triangular patches (8) in each direction are arranged at the included angle between the two patch strips (6); a gap is reserved between the two triangular patches (8) in each direction, a cross-shaped gap II (9) is formed by the gaps between the two triangular patches (8) in the four directions, the cross-shaped gap II (9) and the cross-shaped gap I (7) are in up-down correspondence, the triangular patches (8) are additionally coupled among the patch strips (6), in-band impedance matching is improved, and the triangular patches (8) can be used as a high-frequency radiation unit to generate a new resonance point.
4. The multi-resonance-point broadband +/-45-degree dual-polarized antenna as claimed in claim 2, wherein: the feed structure (4) comprises a first feed balun (41) and a second feed balun (42) which are orthogonal, one ends of the first feed balun (41) and the second feed balun (42) are connected with the patch strip (6) through the first open slot (31), and the other ends of the first feed balun (41) and the second feed balun (42) penetrate through a second open slot (51) formed in the metal floor (5) to be fixed on the metal floor (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310225474.5A CN115954649B (en) | 2023-03-10 | 2023-03-10 | Multi-resonance-point broadband + -45 DEG dual-polarized antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310225474.5A CN115954649B (en) | 2023-03-10 | 2023-03-10 | Multi-resonance-point broadband + -45 DEG dual-polarized antenna |
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| CN115954649A true CN115954649A (en) | 2023-04-11 |
| CN115954649B CN115954649B (en) | 2023-05-16 |
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| US20100171675A1 (en) * | 2007-06-06 | 2010-07-08 | Carmen Borja | Dual-polarized radiating element, dual-band dual-polarized antenna assembly and dual-polarized antenna array |
| CN109687135A (en) * | 2019-01-16 | 2019-04-26 | 重庆邮电大学 | A kind of wideband dual polarized base station antenna unit suitable for 4G/5G mobile communication |
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2023
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| US20090224995A1 (en) * | 2005-10-14 | 2009-09-10 | Carles Puente | Slim triple band antenna array for cellular base stations |
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| US20210057823A1 (en) * | 2019-08-19 | 2021-02-25 | South China University Of Technology | Millimeter wave filtering antenna and wireless communication device |
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