Ultra-wideband high-power dual-polarized horn antenna

Abstract

The invention relates to the technical field of wireless communication, and particularly discloses an ultra-wideband high-power dual-polarized horn antenna, which comprises a horn body with a ridge inside, a feed cavity arranged at the flange end of the horn body, and an N-type connector mounted on the feed cavity and connected with the ridge, the flange end of the horn body is of a quadrilateral structure; the radiation end of the horn body is of an octagonal structure, and a quadrangular structure is gradually transited into the octagonal structure in the radial direction of the octagonal structure. The antenna has the advantages of being wide in working frequency band, large in tolerance power (larger than 500 W), low in standing wave, capable of linearly increasing the gain along with the frequency and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communications, and more particularly to an ultra-wideband high-power dual-polarization horn antenna. Background Art

[0002] With the development of communication, telemetry, and remote control technologies and the expansion of radar application scope, single polarization can no longer meet system requirements, and the application of ultra-wideband and high-power dual-polarization antennas has become more and more widespread.

[0003] When it comes to ultra-wideband, high-power, and dual-polarization technologies, the most widely used is the horn antenna. Summarizing engineering implementation cases and publicly published literature, the existing technology has the following three shortcomings: First, the antenna gain does not change linearly with increasing frequency, and a "concave" phenomenon occurs;

[0004] Take the document "Design of 0.8-2.5GHz Dual-Polarized Quad-Ridged Conical Horn Antenna" ("Modern Electronic Technology" Jun. 2013 Vol. 36 No. 11) as an example; within the 3x operating band, due to the generation of high-order modes, its 1.6GHz gain is 2 dB lower than that of 1.3GHz, and its 2.1GHz gain is 1.3 dB lower than that of 1.9GHz, so the antenna efficiency is low; secondly, the antenna standing wave is relatively high.

[0005] Taking the Chinese patent with publication number CN116191054A as an example, within the 2.5 times frequency band, its port standing wave is greater than 2.5, the antenna reflected power is large, and it cannot meet the use requirements of high-power transmission systems; finally, the antenna has a low power tolerance threshold; because the dual-polarized horn antenna using the traditional N-type connector is prone to "resonance" at some frequencies when working in ultra-wideband at X and above frequency bands, its standing wave is prone to "resonance" at some frequencies. Therefore, in engineering, ultra-wideband dual-polarized horn antennas working in X and above frequency bands mostly use SMA connectors.

[0006] Taking the Chinese patent with publication number CN214013170U as an example, its withstand power is only 10W (continuous wave), and the antenna cannot meet the use requirements of a high-power transmission system.

[0007] In summary, the existing ultra-wideband dual-polarization horn antenna technology cannot meet the requirements of high-performance ultra-wideband high-power systems. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide an ultra-wideband high-power dual-polarized horn antenna; it has ultra-wideband characteristics, within a 4-fold bandwidth, the standing wave is less than 1.65, the port isolation is greater than 45 decibels, the gain increases linearly with the frequency, reaching 10 decibels to 16.4 decibels; the antenna withstand power threshold is greater than 500W.

[0009] The solution adopted by the present invention to solve the technical problem is:

[0010] An ultra-wideband high-power dual-polarization horn antenna comprises a horn body with a ridge inside, a feeding cavity arranged at a flange end of the horn body, and an N-type connector installed on the feeding cavity and connected to the ridge;

[0011] The flange end of the horn body is a quadrilateral structure; the radiation end of the horn body is an octagonal structure, and gradually transitions from a quadrilateral structure to an octagonal structure along its radial direction.

[0012] In some possible implementations, the ridges are in four groups, and the four groups of ridges are evenly arranged in the speaker body and are in a cross structure.

[0013] In some possible implementations, the feeding cavity is in a quadrilateral structure, and rectangular ridges corresponding to and connected to each other are arranged inside the feeding cavity.

[0014] In some possible implementations, the N-type connectors are in two groups, and the angle formed by the axes of the two groups of N-type connectors is 90°; one end of the N-type connector passes through the rectangular ridge on the same side and is connected to the rectangular ridge opposite to the rectangular ridge.

[0015] In some possible embodiments, the feeding cavity includes a cavity body arranged at the flange end of the speaker body, a matching cavity arranged on the side of the cavity body away from the speaker body, and two groups of feeding cavities arranged on the cavity body and respectively used to install N-type connectors; the four groups of rectangular ridges are located in the cavity body.

[0016] In some possible embodiments, the N-type connector includes an outer shell, an inner core inserted into the outer shell, and a supporting medium inserted into the outer side of the inner core and located between the outer shell and the inner core; the inner core and the supporting medium pass through a rectangular ridge on the same side as the outer shell, and an end of the inner core passes through an end of the supporting medium away from the outer shell and is connected to a rectangular ridge opposite to the rectangular ridge.

[0017] In some possible embodiments, the inner core includes a core shaft and a boss mounted on the outside of the core shaft; the core shaft includes a support section located on the side of the boss away from the rectangular ridge, a transition section mounted in the corresponding rectangular ridge and connected to the connecting section, and a connecting section extending into another group of rectangular ridges; the outer diameters of the support section, the transition section, and the connecting section decrease successively.

[0018] In some possible implementations, the side length of the quadrilateral structure is 0.768λ 0 , the side length of the octagonal structure is 0.884λ 0 The height of the speaker along its axial direction is 2.52λ 0 , the size of the cavity body is 0.768λ 0 ×0.768λ0 ×0.42λ 0 ; The side length of the matching cavity is 0.413λ 0 ×0.413λ 0 ,λ 0 is the working center frequency f 0 Corresponding wavelength;

[0019] In some possible implementations, the ridge is an exponential gradient structure, and the thickness of the ridge is 0.153λ 0 .

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention can effectively suppress the antenna high-order mode by setting the speaker body to a four-octagon transformation structure, and effectively solve the problem of "concave" gain with increasing frequency; polarization in two directions is achieved by setting two sets of N-type connectors, and impedance matching can also be effectively achieved; at the same time, the use of N-type connectors for feeding will effectively increase its tolerance power threshold to 500W;

[0022] The invention has ultra-wideband characteristics. Within a 4-fold bandwidth, the standing wave is less than 1.65, the port isolation is greater than 45 decibels, and the gain increases linearly with the frequency, reaching 10 decibels to 16.4 decibels. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the speaker body in the present invention;

[0025] Figure 3 is a cross-sectional view of the present invention;

[0026] Figure 4 This is a schematic diagram of the connection relationship between the feeding cavity and the N-type connector in the present invention;

[0027] Figure 5 It is a side view of the connection relationship between the feeding cavity and the N-type connector in the present invention;

[0028] Figure 6 This is a schematic diagram of the internal connection relationship between the feeding cavity and the N-type connector in the present invention;

[0029] Figure 7 It is a structural schematic diagram of the core shaft in the present invention;

[0030] Figure 8 The standing wave simulation curve of the present invention;

[0031] Fig. 9 It is the port isolation simulation curve of the present invention;

[0032] Fig.10 The present invention is min Directional pattern simulation results (0° and 90° cross sections);

[0033] Fig.11 The f0 pattern simulation results of the present invention (0° and 90° sections);

[0034] Fig.12 The present invention max Directional pattern simulation results (0° and 90° cross sections);

[0035] Fig.13 It is a simulation curve of gain changing with frequency within a 4-fold bandwidth of the present invention;

[0036] Among them: 1. speaker body; 2. ridge; 3. feeding cavity; 301. matching cavity; 302. feeding cavity; 303. rectangular ridge; 3031. ridge one; 3032. ridge two; 3033. ridge three; 3034. ridge four; 304. cover plate; 4. N-type connector; 401. inner core; 4011. boss; 402. supporting medium; 403. outer shell. DETAILED DESCRIPTION

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. The "first", "second" and similar words mentioned in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, "one" or "one" and other similar words do not indicate a quantity restriction, but indicate the existence of at least one. In the implementation of this application, "and / or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more. For example, multiple positioning columns refer to two or more positioning columns. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The present invention is described in detail below.

[0039] like Figure 1-Figure 13 As shown:

[0040] An ultra-wideband high-power dual-polarized horn antenna comprises a horn body 1 having a ridge 2 inside, a feed cavity 3 arranged at a flange end of the horn body 1, and an N-type connector 4 mounted on the feed cavity 3 and connected to the ridge 2;

[0041] The speaker body 1 adopts a quadrilateral-octagonal transformation structure, and the flange end of the speaker body 1 is a quadrilateral structure; the radiation end of the speaker body 1 is an octagonal structure, and gradually transitions from a quadrilateral structure to an octagonal structure along its radial direction, thereby suppressing the generation of high-order modes and effectively solving the problem of gain "concave" as the frequency increases;

[0042] The quadrilateral structure is a regular quadrilateral, and the octagonal structure is a regular octagon, and the two are coaxial;

[0043] The two N-type connectors 4 are provided to realize vertical polarization and horizontal polarization respectively; power feeding and impedance matching can also be effectively realized; and the use of the N-type connector 4 for power feeding can effectively increase the power tolerance threshold to 500W.

[0044] The ridges 2 are in four groups, and the four groups of ridges 2 have the same structure; the four groups of ridges 2 are evenly arranged in the speaker body 1 and are in a cross structure.

[0045] In some possible implementations, the feeding cavity 3 is a square ridge waveguide structure, which is a regular quadrilateral structure, and rectangular ridges 303 corresponding to the ridges 2 and connected to each other are arranged inside it, and the four groups of rectangular ridges 303 have the same structure; the straight line where the cross structure formed by the four groups of rectangular ridges 303 is located will be located on the center line of the feeding cavity 3;

[0046] Furthermore, in order to avoid interference between the four groups of rectangular ridges 303, the four groups of rectangular ridges 303 are chamfered at one end close to each other; specifically, the chamfer size is 0.095λ 0 and 0.056λ 0 ; 0.095λ 0 is the length dimension of each set of rectangular ridges 303, 0.056λ 0 is the dimension in the width direction of each set of rectangular ridges 303;

[0047] In some possible implementations, the N-type connectors 4 are in two groups, one of which realizes vertical polarization and the other realizes horizontal polarization; the angle formed by the axes of the two groups of N-type connectors 4 is 90°; one end of the N-type connector 4 passes through the rectangular ridge 303 on the same side and is connected to the rectangular ridge 303 opposite to the rectangular ridge 303; the two groups of N-type connectors 4 are not on the same plane;

[0048] like Figure 4As shown, the rectangular ridge 303 includes a ridge 1 3031, a ridge 2 3032, a ridge 3 3033, and a ridge 4 3034 arranged in sequence, the ridge 1 3031 and the ridge 3 3033 are arranged opposite to each other, and the ridge 2 3032 and the ridge 4 3034 are arranged opposite to each other, forming a cross structure and being located in the feeding cavity 3; one end of one group of N-type connectors 4 passes through the ridge 1 3031 and is connected to the ridge 3 3033, and the other group passes through the ridge 2 3032 and is connected to the ridge 4 3034;

[0049] In some possible embodiments, the feeding cavity 3 includes a cavity body arranged at the flange end of the speaker body 1, a matching cavity 301 arranged on the side of the cavity body away from the speaker body 1, two groups of feeding cavities 302 arranged on the cavity body and respectively used to install N-type connectors 4, and a cover plate arranged on the outside of the matching cavity 301; the four groups of rectangular ridges 303 are located in the cavity body.

[0050] In some possible embodiments, the N-type connector 4 includes an outer shell 403, an inner core 401 inserted into the outer shell 403, and a supporting medium 402 inserted into the outer side of the inner core 401 and located between the outer shell 403 and the inner core 401; the inner core 401 and the supporting medium 402 pass through a rectangular ridge 303 on the same side as the outer shell 403, and an end of the inner core 401 passes through an end of the supporting medium 402 away from the outer shell 403 and is connected to a rectangular ridge 303 opposite to the rectangular ridge 303.

[0051] In some possible implementations, such as Figure 7 As shown, the inner core 401 includes a core shaft and a boss 4011 sleeved on the outer side of the core shaft; the core shaft includes a support section located on the side of the boss 4011 away from the rectangular ridge 303, a transition section sleeved in the corresponding rectangular ridge 303 and connected to the connecting section, and a connecting section extending into another set of rectangular ridges 303; the outer diameters of the support section, the transition section, and the connecting section decrease in sequence;

[0052] Furthermore, the outer diameter of the support section is 3.04 mm and the length is 0.2375λ 0 -0.262520λ 0 ;

[0053] The outer diameter of the transition section is 0.02375λ 0 -0.0385λ 0 , with a length of 0.327λ 0 -0.362λ 0 ; The specific transition section includes a section 1 arranged near one end of the support section and a section 2 coaxially connected to the end;

[0054] The outer diameter D2 of segment 1 is 0.0348λ 0 -0.0385λ 0, length L2 is 0.169λ 0 -0.187λ 0 ;

[0055] The outer diameter D3 of segment 2 is 0.02375λ 0 -0.02625λ 0 , length L3 is 0.158λ0-0.175λ 0 ;

[0056] The outer diameter D4 of the connecting section is 0.0171λ 0 -0.0189λ 0 , length L4 is 0.176λ 0 -0.194λ 0 ;

[0057] The core shaft is a steel rod with a circular cross-section, which is coaxially arranged with the boss 4011 and is used to fix the core shaft in the supporting medium 402. The setting of the boss 4011 will effectively prevent the inner core 401 from rotating and moving longitudinally in the supporting medium 402; further, the supporting medium 402 is made of polyimide material, which can not only fix the inner core 401, but also achieve sealing of the N-shaped connector.

[0058] In some possible implementations, the side length of the quadrilateral structure is 0.768λ 0 , the side length of the octagonal structure is 0.884λ 0 The height of the speaker body 1 along its axial direction is 2.52λ 0 , the size of the cavity body is 0.768λ 0 ×0.768λ 0 ×0.42λ 0 ; The side length of the matching cavity 301 is 0.413λ 0 ×0.413λ 0 ,λ 0 is the working center frequency f 0 Corresponding wavelength;

[0059] In some possible implementations, the ridge 2 has an exponential gradient structure, the thickness of the ridge 2 is 0.153λ0, and one end of the ridge 2 close to the feeding cavity 3 is chamfered.

[0060] The present invention is simulated, and the simulation results are as follows: Figure 8-Figure 11 As shown:

[0061] like Figure 8 As shown, the ultra-wideband high-power dual-polarization horn antenna proposed by the present invention has a port standing wave less than 1.65 within 4 octaves, which meets the use requirements of high-power transmission systems.

[0062] like Fig. 9As shown, the ultra-wideband high-power dual-polarization horn antenna proposed by the present invention has a port isolation greater than 45 decibels within 4 octaves, meeting the use requirements of high-power transmission systems.

[0063] like Fig.10 As shown, the ultra-wideband high-power dual-polarization horn antenna proposed in the present invention is min The directional pattern simulation results show that the gain reaches 10 decibels.

[0064] like Fig.11 As shown, the ultra-wideband high-power dual-polarization horn antenna proposed in the present invention is 0 The directional pattern simulation results show that the gain reaches 14.1 dB.

[0065] like Fig.12 As shown, the ultra-wideband high-power dual-polarization horn antenna proposed in the present invention is max The directional pattern simulation results show that the gain reaches 16.4 dB.

[0066] like Fig.13 As shown in the figure, the gain of the ultra-wideband high-power dual-polarized horn antenna proposed by the present invention changes with frequency within 4 octaves. As can be seen from the figure, the gain tends to increase linearly with frequency, without obvious "concave" phenomenon. It meets the use requirements of high-performance systems.

[0067] The present invention is not limited to the above-mentioned specific embodiments, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims

1. An ultra-wideband high-power dual-polarized horn antenna, characterized in that: It comprises a speaker body with a ridge inside, a feeding cavity arranged at a flange end of the speaker body, and an N-type connector installed on the feeding cavity and connected to the ridge; The flange end of the horn body is a quadrilateral structure; the radiation end of the horn body is an octagonal structure, and gradually transitions from a quadrilateral structure to an octagonal structure along its radial direction.

2. The ultra-wideband high-power dual-polarization horn antenna according to claim 1, characterized in that: The ridges are in four groups, and the four groups of ridges are evenly arranged in the speaker body and present a cross structure.

3. The ultra-wideband high-power dual-polarization horn antenna according to claim 1, characterized in that: The feeding cavity is in a quadrilateral structure, and rectangular ridges corresponding to and connected to each other are arranged inside the feeding cavity.

4. The ultra-wideband high-power dual-polarization horn antenna according to claim 3, characterized in that: There are two groups of N-type connectors, and the angle formed by the axes of the two groups of N-type connectors is 90°; one end of the N-type connector passes through the rectangular ridge on the same side and then connects to the rectangular ridge opposite to the rectangular ridge.

5. The ultra-wideband high-power dual-polarization horn antenna according to claim 4, characterized in that: The feeding cavity comprises a cavity body arranged at the flange end of the horn body, a matching cavity arranged at a side of the cavity body away from the horn body, and two groups of feeding cavities arranged on the cavity body and respectively used to install N-type connectors; the four groups of rectangular ridges are located in the cavity body.

6. The ultra-wideband high-power dual-polarization horn antenna according to claim 3, characterized in that: The N-type connector includes an outer shell, an inner core sleeved in the outer shell, and a supporting medium sleeved outside the inner core and located between the outer shell and the inner core; the inner core and the supporting medium pass through a rectangular ridge on the same side as the outer shell, and an end of the inner core passes through an end of the supporting medium away from the outer shell and is connected to a rectangular ridge opposite to the rectangular ridge.

7. The ultra-wideband high-power dual-polarization horn antenna according to claim 6, characterized in that: The inner core includes a core shaft and a boss mounted on the outside of the core shaft; the core shaft includes a support section located on the side of the boss away from the rectangular ridge, a transition section mounted in the corresponding rectangular ridge and connected to the connecting section, and a connecting section extending into another group of rectangular ridges; the outer diameters of the support section, transition section, and connecting section decrease in sequence.

8. The ultra-wideband high-power dual-polarization horn antenna according to claim 5, characterized in that: The side length of the quadrilateral structure is 0.768λ0, the side length of the octagonal structure is 0.884λ0, the height of the horn along its axial direction is 2.52λ0, the size of the cavity body is 0.768λ0×0.768λ0×0.42λ0; the side length of the matching cavity is 0.413λ0×0.413λ0, and λ0 is the wavelength corresponding to the working center frequency f0.

9. The ultra-wideband high-power dual-polarization horn antenna according to claim 8, characterized in that: The ridge presents an exponential gradient structure, and the thickness of the ridge is 0.153λ0.

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