High-performance splash plate feed source antenna meeting ETSI clas-4 standard

Abstract

A high-performance splash plate feed source antenna meeting the ETSI clas-4 standard comprises an antenna main reflecting surface, a feed circular waveguide, a splash plate and a choke disc, the feed circular waveguide, the splash plate and the choke disc are sequentially and coaxially arranged on the antenna main reflecting surface from bottom to top, the choke disc is of a circular truncated cone structure, and a plurality of first annular grooves are coaxially formed in the upper surface of the choke disc. Through reasonable arrangement of component structures, local electromagnetic wave distribution is changed, and electromagnetic waves reflected back to the circular waveguide tube are reduced, so that the standing-wave ratio is improved; the antenna is relatively simple in overall structure, convenient to process and assemble, firm, durable, high in reliability and high in practical value, the anti-interference capability of the antenna is greatly improved, and the antenna can be suitable for batch production.

Description

TECHNICAL FIELD

[0001] The utility model belongs to microwave antenna technical field, concretely relates to a high performance splash board feed source antenna satisfying ETSI class-4 standard. BACKGROUND

[0002] With the increasingly developed microwave communication technology, under the premise of pursuing the communication technology field of large power, large capacity, and increasingly scarce spectrum resources and tower resources, how to reduce the mutual interference between antennas under high density and improve the working efficiency of microwave antenna becomes the problem that each manufacturer urgently needs to solve. SUMMARY

[0003] In view of the above problems, the utility model aims at providing a high performance splash board feed source antenna satisfying ETSI class-4 standard, solving the technical problem of reducing the mutual interference between antennas under high density and improving the working efficiency of microwave antenna.

[0004] To achieve the above object, the utility model adopts the technical scheme that includes:

[0005] A high performance splash board feed source antenna satisfying ETSI class-4 standard, comprising an antenna main reflecting surface, a feed circular waveguide, a splash board and a choke disc are coaxially arranged on the antenna main reflecting surface from bottom to top, the choke disc is a circular truncated cone structure, and a plurality of first annular grooves are coaxially arranged on the upper surface of the choke disc.

[0006] Preferably, the splash board comprises a dielectric matching plug and a dielectric support coaxially connected, the dielectric matching plug is matched with and connected to the inner cavity structure of the upper end of the feed circular waveguide, the cross section of the dielectric support increases from bottom to top, and a plurality of annular steps are coaxially arranged on the outer periphery of the dielectric support from bottom to top, and a second annular groove is arranged between adjacent two annular steps.

[0007] Preferably, the input end of the feed circular waveguide is coaxially provided with a transition section with a cross section diameter larger than that of the feed circular waveguide.

[0008] Preferably, the feed circular waveguide and the antenna main reflecting surface are connected through a connecting ring.

[0009] Preferably, the first annular grooves on the upper surface of the choke disc are at least four.

[0010] Compared with the prior art, the utility model has the advantages that:

[0011] (1) The utility model relates to a high-performance sputtering plate feed source antenna satisfying ETSI class-4 standard, through reasonable setting of component structure, change local electromagnetic wave distribution, reduce the electromagnetic wave in the reflection back circular wave guide pipe, to improve the standing wave ratio, the overall structure is relatively simple, and processing and assembly are convenient, and it is solid and durable, and the reliability is high, has very strong practical value, greatly improves the anti-interference ability of the antenna, and can adapt to batch production.

[0012] (2) The utility model relates to a high-performance sputtering plate feed source antenna satisfying ETSI class-4 standard, through reasonable setting of component structure, under the joint action of the second annular groove 2-2a on the medium support 2 and the first annular groove 3-1 on the choke disc 3, the electromagnetic wave reflected into the feed circular wave guide port is reduced, and the standing wave ratio is reduced.

[0013] (3) The utility model relates to a high-performance sputtering plate feed source antenna satisfying ETSI class-4 standard, on 1.2m antenna main reflecting surface, the antenna system each index satisfies ETSI class-4 standard, and the feed source part is simple after processing and assembly, can guarantee each technical index, and saves about expense, and is especially suitable for batch production. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with the following specific embodiment, but do not constitute the limitation to the utility model.In the drawings:

[0015] Figure 1 It is the structure schematic diagram of the high-performance sputtering plate feed source antenna satisfying ETSI class-4 standard of the utility model;

[0016] Figure 2 It is the structure schematic diagram of the choke disc in the utility model; Figure 1

[0017] Figure 3 It is the structure schematic diagram of the sputtering plate in the utility model; Figure 1

[0018] In the drawings, each reference numeral represents:

[0019] 0 antenna main reflecting surface;1 feed circular wave guide;2 sputtering plate;3 choke disc, 4 connecting ring;

[0020] 1-1 transition section;

[0021] 2-1 medium matching plug, 2-1a ladder change surface;2-2 medium support, 2-2a second annular groove, 2-2b annular ladder;

[0022] 3-1 first annular groove. ​​DETAILED DESCRIPTION

[0023] The utility model is not limited to the following specific embodiments, any equivalent transformation based on the technical scheme of the application falls within the protection scope of the utility model.

[0024] It should be noted that the directional terms mentioned herein, such as "cavity", "inner periphery", "inner wall" and "outer side", are consistent with the specific direction on the paper of the attached drawings or the corresponding direction of the space shown in the drawings; all components and devices in the utility model, such as without special instructions, all use the components and devices known in the prior art.

[0025] EMBODIMENT

[0026] The embodiment discloses a high-performance splay plate feed antenna satisfying ETSI class-4 standards, which comprises an antenna main reflecting surface 0, a feed circular waveguide 1, a splay plate 2 and a choke plate 3 which are coaxially arranged on the antenna main reflecting surface 0 from bottom to top, the choke plate 3 is in a circular truncated cone structure, and a plurality of first annular grooves 3-1 are coaxially arranged on the upper surface of the choke plate 3.

[0027] The first annular grooves 3-1 can change the local electromagnetic wave distribution, reduce the electromagnetic wave reflected into the circular waveguide, and thus improve the standing wave ratio; meanwhile, the choke plate 3 changes the complex elliptical surface into a simple circular truncated cone surface, reduces the processing difficulty, the feed source adopts an axisymmetric shape structure, the linear polarization purity is high, and high cross-polarization discrimination can be realized. The choke plate 3 serves as a secondary reflecting surface, the general front-fed reflector antenna is changed into a back-fed reflector antenna by introducing the choke plate, the electromagnetic wave emitted by the feed source is reflected twice by the choke plate 3 and the main reflecting surface 0 to reach the aperture of the antenna, the field distribution of the aperture surface of the antenna is conveniently controlled, the amplitude of the main surface aperture field of the reflector antenna is uniformly distributed, and the phase is equally distributed. The overall structure is relatively simple, convenient to process and assemble, solid and durable, high in reliability, has strong practical value, greatly improves the anti-interference capability of the antenna, and can adapt to batch production.

[0028] The input end of the feed circular waveguide 1 is coaxially provided with a transition section 1-1 with a cross-sectional diameter larger than that of the feed circular waveguide 1, for measuring or connecting a microwave device. The feed circular waveguide 1 is connected with the antenna main reflecting surface 0 through a connecting ring 4, the connecting ring 4 is preferably a flange plate, and the flange plate with the size matched with the antenna main reflecting surface 4 is adhesively fixed.

[0029] The feed circular waveguide 1 is a metal circular waveguide TE11, the main reflecting surface 4 is not a standard rotating parabolic surface with only one focal point, but adopts a ring focus design, so that the back level is lower and the anti-interference capability is stronger.

[0030] The splay plate 2 disclosed by the embodiment comprises a coaxial medium matching plug 2-1 and a medium support 2-2; the medium matching plug 2-1 is matched with and connected to the inner cavity structure of the upper end of the feed circular waveguide 1; the medium matching plug 2-1 is designed with a quarter wavelength stepped impedance transformation towards the direction of the feed circular waveguide 1 for impedance matching; according to the actual situation, the impedance matching between the medium matching plug 2-1 and the feed circular waveguide 1 can be completed by adjusting the length and the stepped height of the medium matching plug 2-1. The cross section of the medium support 2-2 increases from bottom to top, which can be processed into a simple circular table surface, reducing the processing difficulty, and a plurality of annular steps 2-2b are coaxially arranged on the outer periphery of the medium support 2-2 from bottom to top, and a second annular groove 2-2a is arranged between adjacent two annular steps 2-2b, which can change the local electromagnetic wave distribution, reduce the electromagnetic wave reflected into the circular waveguide, and thus improve the standing wave ratio. The upper surface of the medium support 2-2 is provided with an inwardly recessed conical surface, which is matched with the contact surface of the choke disc 3. In the embodiment, the structure and shape of the medium support 2-2 not only have sufficient support strength for the choke disc 3, but also control the electromagnetic wave phase of the main surface.

[0031] In the embodiment, the medium support 2-2 is made of polytetrafluoroethylene dielectric material with a dielectric constant of 2.55, the medium support 2-2 is introduced between the choke disc 3 and the feed circular waveguide 1 to improve the impedance of the antenna, the main mode TE11 of the metal circular waveguide is gradually coupled and transitioned to the main mode TH11 of the dielectric circular waveguide through the dielectric waveguide gradual transition section, when the diameter of the dielectric waveguide is greater than the wavelength, the main mode is mostly transmitted to the choke disc 3 through the gradually thickened and stepped dielectric waveguide, and then the E plane and H plane equalization patterns are formed through the reflection of the choke disc 3. According to the impedance transformation design, the diameters of the sections of the dielectric waveguide, the transition steps and the size of the medium matching plug are designed well to complete the impedance matching between the feed radiation head and the feed circular waveguide 1.

[0032] The working principle of the embodiment is as follows:

[0033] On the premise of ensuring that the illumination level and phase distribution of the main reflector 0 to the feed source are not changed, the electromagnetic wave energy reflected into the inner cavity of the feed circular waveguide 1 is reduced to the maximum extent, and on the sub-reflector (choke disc 3) in the aperture of the feed circular waveguide 1, the reflection wave transmission direction is changed by changing the local geometric shape, so that the reflection wave does not enter the inner cavity of the circular waveguide. Since the electromagnetic wave comes and goes through the medium support 2-2, the reflection wave transmission direction can also be changed by changing the local geometric shape on the surface of the medium support 2-2, so the second annular groove 2-2a on the medium support 2-2 and the first annular groove 3-1 on the choke disc 3 jointly act, and the result is to reduce the electromagnetic wave reflected into the waveguide aperture and reduce the standing wave ratio.

[0034] The preferred embodiments of the present disclosure are described in detail above with reference to the drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Various simple modifications can be made to the technical solutions of the present disclosure within the technical concept of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0035] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0036] In addition, various different embodiments disclosed in the present solution can also be combined in any manner, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as the invention of the present disclosure.

Claims

1. A high performance splayed plate feed antenna meeting the ETSI class-4 standard, comprising an antenna main reflector (0), characterized in that, The antenna comprises a feed circular waveguide (1), a splash plate (2) and a choke plate (3) which are coaxially arranged on the main reflector (0) from bottom to top.

2. The high performance splayed plate feed antenna satisfying the ETSI class-4 standard according to claim 1, wherein, The splash plate (2) comprises a dielectric matching plug (2-1) and a dielectric support (2-2) which are coaxially connected; the dielectric matching plug (2-1) is matched with and connected to the inner cavity structure of the upper end of the feed circular waveguide (1); the cross section of the dielectric support (2-2) increases from bottom to top, and the outer periphery of the dielectric support (2-2) is coaxially provided with a plurality of annular steps (2-2b) from bottom to top, and a second annular groove (2-2a) is arranged between two adjacent annular steps (2-2b).

3. The high performance splayed plate feed antenna satisfying the ETSI class-4 standard according to claim 1, wherein, The input end of the feed circular waveguide (1) is coaxially provided with a transition section (1-1) with a cross section diameter larger than that of the feed circular waveguide (1).

4. The high performance splayed plate feed antenna satisfying the ETSI class-4 standard according to claim 3, wherein, The feed circular waveguide (1) and the main reflector (0) are connected through a connecting ring (4).

5. The high performance splayed plate feed antenna satisfying the ETSI class-4 standard according to any one of claims 1 to 4, wherein, The first annular grooves (3-1) on the upper surface of the choke plate (3) are at least four.

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