Integrated multi-port feed source applied to millimeter wave luneberg lens antenna

Abstract

The invention provides an integrated multi-port feed source applied to a millimeter wave luneberg lens antenna, and the feed source comprises an arc-shaped flange which is of a long-strip-shaped arc-shaped structure and is arranged on one side of the luneberg lens antenna, and the arc-shaped flange and the circle center of a luneberg lens sphere are located on the same side; the outer side of the arc-shaped flange is provided with waveguide cavities which are uniformly distributed, and the interiors of the waveguide cavities are communicated with the outside through feed openings formed in the arc-shaped flange; the waveguide cavity is provided with a feed through hole used for installing a coaxial feed connector. Metal baffles which are periodically arranged are arranged on the inner side of the arc-shaped flange and are arranged on the left side and the right side of the feed opening; second-type through holes are further formed in the arc-shaped flange, the second-type through holes are formed in the upper side and the lower side of the metal baffle, and the second-type through holes and the metal baffle cooperate to form an electromagnetic regulation and control channel. Through the above structure, high isolation and beam smoothing characteristics of the feed source in a millimeter wave frequency band are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wireless communication, in particular to a high-isolation integrated multi-port feed structure with smooth wide-beam characteristics applied to a millimeter wave frequency band dragon-buried lens antenna. BACKGROUND

[0002] As an important support for the implementation of the fifth generation (5G) and future sixth generation (6G) mobile communication systems, millimeter wave technology has been widely used in high-speed wireless communication, virtual reality, autonomous driving, and security imaging due to its advantages of abundant spectrum resources, high transmission rate, and low latency. Compared with traditional microwave frequency bands, millimeter wave frequency bands can significantly improve system capacity and transmission efficiency, and are a key technology direction for building high-performance wireless communication systems.

[0003] In a millimeter wave communication system, an antenna as a core transmitting and receiving component plays a decisive role in the overall performance of the system. Among them, the dragon-buried lens antenna has become an ideal solution in millimeter wave multi-beam communication and radar systems due to its high gain, multi-beam, and wide-angle coverage characteristics. This type of antenna is usually composed of a lens body and a feed array, where the radiation performance of the feed directly determines the beam directivity, gain stability, and radiation efficiency of the lens antenna.

[0004] The dragon-buried lens is usually a spherical symmetric layered dielectric structure, with its dielectric constant gradually decreasing from the center to the outside along the radial direction, forming a refractive index gradient. When multiple feeds are arranged on the surface or focal region of the lens, multi-beam radiation can be achieved. In theory, each beam can obtain similar gain, effectively overcoming the gain unevenness and beam shift problems caused by off-feed in traditional parabolic multi-beam antennas, and is particularly suitable for multi-access communication and multi-beam radar scenarios.

[0005] With the rapid growth of multi-beam communication demand, feed design gradually develops towards multi-port and integration. However, traditional designs usually use multiple independent waveguides or horn feed units, which have the following problems: Large mechanical assembly error and complex structure: there are gaps between each independent feed, leading to discontinuous electromagnetic field distribution, causing beam gain fluctuation and phase error; Severe coupling between ports and insufficient isolation: strong coupling between adjacent feeds under high frequency conditions significantly reduces port isolation, causing beam interference and pattern distortion; Non-smooth pattern and poor beam consistency: independent feed layout is difficult to achieve focal surface conformal matching, resulting in large gain fluctuations in a wide beam angle range, which is not conducive to system stability and radiation consistency.

[0006] Therefore, there is an urgent need for a millimeter wave dragon-buried lens antenna feed structure with compact structure, high isolation and smooth wide-beam characteristics, to significantly suppress electromagnetic coupling between multiple ports, improve the radiation stability and direction consistency of the multi-beam system while ensuring high gain and wide-angle radiation. SUMMARY

[0007] In view of this, the present application proposes an integrated multi-port feed applied to a millimeter wave dragon-buried lens antenna to solve the problems existing in the prior art.

[0008] To achieve the above-mentioned purpose, the present application proposes an integrated multi-port feed applied to a millimeter wave dragon-buried lens antenna, comprising: The arc-shaped flange is a long strip-shaped arc structure, which is arranged on one side of the dragon-buried lens sphere, and the cross-sectional shape of the arc-shaped flange is taken from the arc segment region between two concentric cylindrical surfaces with a radius greater than that of the outer medium layer of the dragon-buried lens sphere, and the center of the arc-shaped flange and the dragon-buried lens sphere is on the same side. The arc-shaped flange is provided with uniformly distributed waveguide cavities on the side away from the dragon-buried lens antenna, wherein the waveguide cavities are hollow inside, the arc-shaped flange is provided with a feed opening, and the inside of the waveguide cavity is in communication with the outside through the feed opening; the waveguide cavity is provided with a feed through hole, and the feed through hole is used to install a coaxial feed connector; The arc-shaped flange is provided with periodically arranged metal baffles on the side close to the dragon-buried lens sphere, and the metal baffles are arranged on the left and right sides of the feed opening. The arc-shaped flange is also provided with a second type of through hole, which is arranged on the upper and lower sides of the metal baffle, and the second type of through hole cooperates with the metal baffle to form an electromagnetic regulation channel.

[0009] Optionally, the arc-shaped flange is provided with a first type of through hole at four vertices, and the first type of through hole is used to install a fastening screw.

[0010] Optionally, the position between the dragon-buried lens sphere and the arc-shaped flange is fixed, and there is a gap between the dragon-buried lens sphere and the metal baffle.

[0011] Optionally, the second type of through hole is uniformly distributed along the inner side of the arc-shaped flange, and the axis of the second type of through hole is perpendicular to the inner side surface of the arc-shaped flange, wherein the inner side of the arc-shaped flange is the side close to the dragon-buried lens sphere.

[0012] Optionally, the metal baffle is periodically distributed along the inner side arc surface direction of the arc-shaped flange, and the plane of the metal baffle is perpendicular to the inner side surface of the arc-shaped flange, wherein the inner side of the arc-shaped flange is the side close to the dragon-buried lens sphere.

[0013] Optionally, the arc-shaped flange, the metal baffle and the waveguide cavity are integrally arranged.

[0014] Optionally, the second type of through hole, the waveguide cavity and the metal baffle are uniformly distributed along the arc surface of the arc-shaped flange close to one side of the dragonbore lens sphere.

[0015] Optionally, the arc-shaped flange and the waveguide cavity are made of metal.

[0016] Compared with the prior art, the present application has the following advantages: (1) High port isolation: The electromagnetic shielding channel formed by the second type of through hole and the metal baffle can suppress the lateral diffusion of surface current to some extent, so that the port isolation of the present application is not less than 25 dB under the condition of structural co-flange, which is better than the traditional independent feed structure, and ensures the signal independence and stability of each channel in the multi-beam system.

[0017] (2) Structural conformal and integrated design: The arc-shaped co-flange integrated structure is adopted in the present application, so that the waveguide horn is distributed along the curvature direction of the dragonbore lens focal plane, realizing the conformal installation of the feed and the lens. This design effectively reduces the focal plane phase error and improves the beam focusing performance, and significantly shortens the size of the feed array. The flange, baffle and waveguide cavity are integrally processed and formed, taking into account high mechanical precision and structural strength, meeting the miniaturization and high reliability requirements of the millimeter wave system.

[0018] (3) Pattern smoothing and beam consistency improvement: The metal baffle structure effectively controls the electric field distribution and phase continuity between waveguides, so that the main lobe gain fluctuation is reduced to within 1 dB, and the pattern is more stable. The geometric matching of the arc-shaped flange and the lens focal plane realizes the approximate equal focal layout of each waveguide, ensuring the beam gain consistency under different port excitation, and significantly improving the radiation consistency and directional stability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included only to illustrate preferred embodiments and are not to be considered as limiting of the present application. In the drawings: Figure 1 is a schematic diagram of the overall structure of the millimeter wave dragonbore lens antenna of the present application; Figure 2 is a top view of the millimeter wave dragonbore lens antenna of the present application; Figure 3 is a layered dielectric profile of the dragonbore lens sphere of the present application; Figure 4 is a schematic diagram of the overall structure of the integrated multi-port feed of the present application; Figure 5Fig. 1 is a front view of the overall structure of the integrated multi-port feed source of the present application; Figure 6 Fig. 2 is a top view of the overall structure of the integrated multi-port feed source of the present application; Figure 7 Fig. 3 is a graph of the S-parameter simulation results of the integrated multi-port feed source of the present application; Figure 8 Fig. 4 is the radiation pattern of the single port of the integrated multi-port feed source of the present application at 25 GHz, wherein (a) is the simulation result without the metal baffle structure, and (b) is the simulation result after introducing the metal baffle; Figure 9 Fig. 5 is the radiation pattern of one of the ports of the integrated multi-port feed source of the present application at 27.5 GHz, wherein (a) is the simulation result without the metal baffle structure, and (b) is the simulation result after introducing the metal baffle; Figure 10 Fig. 6 is the radiation pattern of one of the ports of the integrated multi-port feed source of the present application at 29 GHz, wherein (a) is the simulation result without the metal baffle structure, and (b) is the simulation result after introducing the metal baffle; Figure 11 Fig. 7 is the E-plane radiation pattern of the six ports of the millimeter wave dragon-buried lens antenna of the present application at 25 GHz; Figure 12 Fig. 8 is the E-plane radiation pattern of the six ports of the millimeter wave dragon-buried lens antenna of the present application at 27.5 GHz; Figure 13 Fig. 9 is the E-plane radiation pattern of the six ports of the millimeter wave dragon-buried lens antenna of the present application at 29 GHz.

[0020] In the figure: 1, dragon-buried lens sphere; 2, coaxial feed connector; 3, integrated multi-port feed source; 101, inner dielectric layer of the dragon-buried lens; 102, intermediate dielectric layer of the dragon-buried lens; 103, outer dielectric layer of the dragon-buried lens; 301, arc-shaped flange; 302, first type of through hole; 303, second type of through hole; 304, waveguide cavity; 305, metal baffle. DETAILED DESCRIPTION

[0021] Exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood, and the scope of the present disclosure can be accurately conveyed to those skilled in the art. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0022] The main purpose of the present application is to overcome the problems of serious inter-port coupling interference, insufficient isolation and large structure volume in the prior art, and to provide an integrated multi-port feed structure with high isolation and smooth wide beam characteristics suitable for millimeter wave frequency band Luneberg lens antenna. The feed maintains the integrated compact design while achieving high isolation and beam smoothing characteristics in the millimeter wave frequency band to meet the demand for high-performance multi-beam antennas in the new generation of wireless communication systems.

[0023] To achieve the above-mentioned purpose, the present application provides a multi-port integrated high-isolation feed structure. The integrated multi-port feed 3 of the present application mainly comprises an arc-shaped metal flange 301, a waveguide cavity 304 and a metal baffle 305. The arc-shaped flange 301 is an arc-shaped metal flange, the waveguide cavity 304 is a metal waveguide horn cavity, and the metal baffle 305 serves as a metal isolation baffle.

[0024] The Luneberg lens antenna is a radiation system composed of a Luneberg lens sphere 1 and a feed unit. The lens part: a dielectric sphere with a gradient of dielectric constant (or a multi-layer approximate structure); the feed part: a radiation unit (usually a horn antenna, waveguide array, patch array, etc.) located at the focal point on the surface of the lens The Luneberg lens (Luneberg lens sphere 1) is a spherical or spherical cap-shaped lens with a radial gradient of dielectric constant, and its dielectric constant gradually decreases from the center to the outside. Its function is to focus a plane wave to a certain point on the spherical surface. It does not have the ability to transmit or receive (does not radiate).

[0025] The feed of the Luneberg lens antenna is a radiation structure arranged in the focal region of the lens surface, which is used to provide electromagnetic excitation to the Luneberg lens and control the direction of the radiation beam.

[0026] In this scheme, the integrated multi-port feed 3 is applied as a feed for a multi-layer dielectric Luneberg lens antenna. The Luneberg lens sphere 1 is composed of three layers of dielectric materials with different dielectric constants, including an inner layer to an outer layer, namely a Luneberg lens inner dielectric layer 101, a Luneberg lens intermediate dielectric layer 102 and a Luneberg lens outer dielectric layer 103, and the dielectric constant gradually decreases from the inner layer to the outer layer, forming a layered dielectric structure that gradually changes along the radial direction. The structure produces a refractive index gradient inside the lens, which can effectively control the phase distribution of electromagnetic waves and achieve energy focusing and directional radiation, thereby having the ability of multi-directional beam output. The focal plane of the Luneberg lens is located at a certain distance from the outer surface, and by exciting different ports, the beam direction can be flexibly switched and scanned.

[0027] Compared with the traditional feed array composed of multiple independent horns, the structure of the integrated multi-port feed 3 of the application can realize the consistency of gain between multiple beams while maintaining high gain, avoid the common beam deviation and gain inconsistency problems in parabolic or offset feed systems, and significantly improve the radiation consistency and directional stability of the feed system.

[0028] The arc-shaped flange 301 adopts a long strip-shaped arc-shaped structure of metal material, so that multiple waveguide cavities 304 are distributed along the curvature direction of the focal surface of the dragon lens, realizing conformal installation of the feed and the lens, thereby effectively reducing the focal surface phase error, improving the focusing performance and shortening the radial size of the feed array. Two types of through holes are provided on the arc-shaped flange 301: the first type of through hole 302 is located at the four vertices of the rectangular area of the arc-shaped flange 301, used for installing a fastening screw to realize mechanical fixation and precise positioning of the feed assembly, and ensure the assembly precision of the feed and the lens, wherein there is a gap between the arc-shaped flange 301 and the dragon lens sphere 1, and the metal baffle 305 does not contact the dragon lens sphere 1, the first type of through hole 302 is used to fix the feed on an additional structure to realize the gap setting between the dragon lens sphere 1 and the feed, wherein the additional structure can be selected as a fixing frame or other structures, which can be simply realized by existing structures, and details are not described here, the gap between the dragon lens sphere 1 and the feed can be adjusted or fixed according to the radiation performance; the second type of through hole 303 is distributed perpendicular to the tangent direction of the surface of the arc-shaped flange 301, and cooperates with the metal baffle 305 to form an electromagnetic regulation channel, used for optimizing the electric field distribution and phase continuity between the waveguide cavities 304, thereby stabilizing the radiation characteristics and improving the pattern smoothness.

[0029] The metal baffle 305 is vertically arranged inside the arc-shaped flange 301 and perpendicular to the tangent plane. The introduction of the metal baffle 305 is mainly used to regulate the electric field distribution and phase consistency between adjacent waveguide cavities 304, so that the main lobe gain fluctuation is controlled within 1 dB, thereby realizing the smoothing of the radiation pattern and improving the beam consistency. The metal baffle 305 and the arc-shaped flange 301 are made of integrated metal processing technology, which not only ensures the structural precision and mechanical stability in the millimeter wave band, but also improves the radiation directivity and stability of the feed system.

[0030] Each waveguide cavity 304, i.e. waveguide horn unit, is a cuboid metal cavity structure, and the inner wall of the waveguide cavity 304 is provided with a chamfer to meet the processing requirements. The front end of the waveguide cavity 304 is a radiation opening, and the side wall is provided with a feed-through hole for installing a coaxial feed connector 2. Multiple waveguide cavities 304 are uniformly distributed along the arc-shaped flange 301, forming a multi-directional radiation characteristic, which adapts to the multi-beam coverage requirement of the dragon lens antenna.

[0031] The application realizes a compact and high-precision feed source scheme through the integrated design of the arc-shaped flange 301, the metal baffle 305 and the waveguide cavity 304. The introduction of the metal baffle 305 improves the electric field distribution between the waveguide cavities 304, so that the main lobe gain fluctuation is controlled within 1 dB, the radiation pattern is more smooth and stable, and the beam consistency and radiation directivity are improved.

[0032] In summary, the high-isolation integrated multi-port feed 3 has the advantages of high port isolation, structural conformality and integration, smooth radiation pattern and high beam consistency, and is suitable for millimeter wave multi-beam communication systems, imaging radars and satellite communication fields, and has wide engineering application prospects.

[0033] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0034] As shown in Figure 1 and Figure 2 , the application provides an integrated multi-port feed structure with high isolation and smooth beam characteristics, which is applied to a millimeter wave dragonbore lens antenna system. The system mainly comprises a dragonbore lens sphere 1, a coaxial feed connector 2 and an integrated multi-port feed 3 as a feed component of the application.

[0035] Figure 3 The three-layer medium dragonbore lens sphere 1 structure diagram used in the application is shown. The dragonbore lens sphere 1 is composed of three layers of medium materials with different dielectric constants, and the dielectric constants decrease step by step from the inner layer to the outer layer, forming a layered medium structure that gradually changes along the radial direction, so as to realize the phase control and energy focusing of the incident electromagnetic wave. In theory, increasing the number of medium layers can make the refractive index distribution closer to the ideal dragonbore lens model, but at the same time, it will significantly increase the processing complexity and manufacturing cost. Considering the comprehensive performance and manufacturability, the three-layer medium structure is selected as the main body of the lens. The lens is composed of a dragonbore lens inner medium layer 101, a dragonbore lens intermediate medium layer 102 and a dragonbore lens outer medium layer 103, and the relative dielectric constants of the three layers of medium are 2.0, 1.8 and 1.6, respectively, and the corresponding radii are R1 = 22 mm, R2 = 40 mm and R3 = 60 mm.

[0036] As shown in Figures 4 to 6 , the six-port integrated feed structure proposed by the application is shown. The feed mainly comprises a coaxial feed connector 2, an arc-shaped flange 301, a first type of through hole 302, a second type of through hole 303, a waveguide cavity 304 and a metal baffle 305. The coaxial feed connector 2 is used to provide radio frequency signal input and realize feed and excitation functions.

[0037] The arc-shaped flange 301 adopts a long strip-shaped arc-shaped structure, and its geometric dimensions are length L0= 78 mm, width W0= 15.2 mm, and thickness H0= 3.5 mm. The arc-shaped flange 301 is taken from the arc segment region between concentric cylindrical surfaces with radii of 71.5 mm and 75 mm, to meet the requirements of conformal installation of the feed source and the focal surface of the Luneberg lens.

[0038] The cross-sectional shape of the arc-shaped flange is taken from the arc segment region between two concentric cylindrical surfaces. The inner cylindrical surface and the outer cylindrical surface correspond to the inner side and the outer side of the feed source respectively. The inner side dimension is mainly to set the spacing dimension between the Luneberg lens sphere 1 as uniform as possible, and the inner side is the position of the focal surface of the Luneberg lens sphere.

[0039] The radius of the inner cylindrical surface 71.5 mm is slightly larger than the spherical radius 60 mm of the Luneberg lens antenna; the radius of the inner cylindrical surface 71.5 mm is approximately the position of the focal surface of the Luneberg lens.

[0040] The outer side dimension mainly ensures the uniform thickness of the arc-shaped flange, and the radius of the outer cylindrical surface 75 mm = 71.5 mm + 3.5 mm, where H0 = 3.5 mm is the thickness of the flange. The arc-shaped flange is close to the focal surface of the Luneberg lens but does not directly contact the surface thereof.

[0041] The waveguide cavities are arranged at equal angles on the arc-shaped flange, and each waveguide opening points to the spherical center of the Luneberg lens sphere.

[0042] The height of the second type of through hole is equal to the thickness of the flange, that is, the radius of the outer cylindrical surface 75 mm minus the radius of the inner cylindrical surface 71.5 mm equals the thickness of the flange H0 = 3.5 mm, which is also the height of the second type of through hole. The depth (height) of the second type of through hole is consistent with the thickness of the flange, and penetrates the radial thickness direction of the arc-shaped flange.

[0043] There are two types of through holes on the arc-shaped flange 301: four first type of through holes 302 with a radius R1 = 1.8 mm, located at the four corners of the rectangular region of the arc-shaped flange 301, with an axis perpendicular to the front view surface of the arc-shaped flange 301, for installing a fastening screw to realize mechanical fixation and precise positioning of the feed source assembly, and to ensure assembly accuracy and structural stability; and 14 second type of through holes 303 with a radius R0= 1.5 mm, uniformly distributed along the length direction of the arc-shaped flange 301, respectively located between adjacent waveguide cavities 304 and the outer side region of the outermost waveguide unit, with one above and one below at each location, and the axis is perpendicular to the surface section of the arc-shaped flange 301.

[0044] The metal baffle 305 is fixed inside the arc-shaped flange 301 and is distributed correspondingly to the second type of through hole 303. Each metal baffle 305 is periodically arranged along the arc-shaped flange 301 with a spacing consistent with adjacent through holes. The geometric size of the metal baffle 305 is length L2 = 7.2 mm, width W2 = 1 mm, and height H2 = 5.5 mm, and is arranged perpendicular to the surface section of the arc-shaped flange 301.

[0045] The second type of through hole 303 cooperates with the metal baffle 305 to form an electromagnetic regulation channel for regulating the electric field distribution and phase continuity between waveguide units. By optimizing the geometric parameters of the second type of through hole 303 and the metal baffle 305, the field distribution uniformity can be improved and the main lobe gain fluctuation can be reduced without increasing the volume of the feed source, thereby obtaining a more smooth and stable directional diagram and excellent beam consistency.

[0046] The waveguide cavity 304 is a cuboid metal structure with an external size of length L1 = 10 mm, width W1 = 10 mm, and height H1 = 6.1 mm, and a wall thickness of 2.5 mm. The inner wall is provided with a 1.5 mm chamfer to meet the processing technology requirements. The front end of the waveguide cavity 304 is communicated with the outside through the radiation opening on the arc-shaped flange 301, and the side wall is provided with a feed-through hole with a radius of 1.1 mm for mounting a coaxial feed connector 2.

[0047] The second type of through hole 303, the waveguide cavity 304, and the metal baffle 305 are uniformly distributed at an interval of 9° along the arc surface direction of the arc-shaped flange 301 to realize reasonable coverage of the spatial beam and meet the multi-beam communication demand.

[0048] Figure 7 The S parameter simulation result diagram of the integrated multi-port feed source of the application, including the reflection coefficient curve of the six-port and the isolation curve between adjacent ports. The results show that the reflection coefficient of each port is better than -13 dB in the working frequency band, and the impedance matching is good; the isolation is better than 25 dB, indicating that the structure has excellent port isolation performance.

[0049] Figures 8 to 10 The single-port E-plane radiation patterns of the feed source at 25 GHz, 27.5 GHz, and 29 GHz, respectively. Among them Figure 8 , Figure 9 , Figure 10 (a) is the result without baffle, Figure 8 , Figure 9 , Figure 10 (b) is the result after adding the baffle. It can be seen that the main lobe gain fluctuation is about 5-6 dB without the baffle, while the fluctuation is controlled within 1 dB after adding the baffle, and the directional diagram is more smooth and stable, indicating that the introduction of the baffle improves the uniformity of the electric field distribution between the waveguides, and improves the beam consistency and directivity.

[0050] Figures 11 to 13 The images show the E-plane radiation patterns of the six ports of the millimeter-wave Luneburg lens antenna of this invention at 25 GHz, 27.5 GHz, and 29 GHz. The results show that each port forms an independent high-gain beam with a stable main lobe, low side lobes, and uniform beam spacing, indicating that the feed and lens are properly matched, achieving stable multi-beam high directivity radiation characteristics.

[0051] In summary, the high-isolation integrated multi-port feed and matching Luneburg lens antenna provided in this embodiment of the invention have a compact structure, excellent inter-port isolation performance, and a smooth and stable radiation pattern, enabling multi-beam high directivity radiation and making them suitable for millimeter-wave multi-beam communication systems.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An integrated multi-port feed for millimeter-wave Luneburg lens antennas, characterized in that, include: An arc-shaped flange, wherein the arc-shaped flange is a long arc-shaped structure, the arc-shaped flange is disposed on one side of the Luneburg lens sphere, the cross-sectional shape of the arc-shaped flange is cut from the arc segment region between two concentric cylindrical surfaces that are larger than the radius of the outer dielectric layer of the Luneburg lens sphere, and the center of the arc-shaped flange and the center of the Luneburg lens sphere are on the same side. The arc-shaped flange has uniformly distributed waveguide cavities on the side away from the Luneburg lens sphere. The waveguide cavities are hollow inside. The arc-shaped flange has a power feeding opening, and the inside of the waveguide cavity is connected to the outside through the power feeding opening. The waveguide cavity has a power feeding through hole for installing a coaxial power feeding connector. The arc-shaped flange is provided with periodically arranged metal baffles on the side near the Luneburg lens sphere, and the metal baffles are located on the left and right sides of the power supply opening. The arc-shaped flange is also provided with a second type of through hole, which is located on the upper and lower sides of the metal baffle. The second type of through hole and the metal baffle together form an electromagnetic control channel.

2. The integrated multi-port feed according to claim 1, characterized in that, The arc-shaped flange has a first type of through hole at each of its four vertices, which is used to install fastening screws.

3. The integrated multi-port feed source according to claim 1, characterized in that, The position of the Luneburg lens sphere and the arc-shaped flange is relatively fixed, and there is a gap between the Luneburg lens sphere and the metal baffle.

4. The integrated multi-port feed source according to claim 1, characterized in that, The second type of through holes are evenly distributed along the inner side of the arc-shaped flange, and the axis of the second through hole is perpendicular to the tangent of the inner surface of the arc-shaped flange, wherein the inner side of the arc-shaped flange is the side close to the Luneburg lens sphere.

5. The integrated multi-port feed according to claim 1, characterized in that, The metal baffles are periodically distributed along the inner arc surface of the arc-shaped flange, and the plane of the metal baffles is perpendicular to the tangent of the inner surface of the arc-shaped flange, wherein the inner side of the arc-shaped flange is the side closer to the Luneburg lens sphere.

6. The integrated multi-port feed according to claim 1, characterized in that, The arc-shaped flange, metal baffle, and waveguide cavity are integrated into a single unit.

7. The integrated multi-port feed according to claim 1, characterized in that, The second type of through holes, waveguide cavities, and metal baffles are evenly distributed at equal angular intervals along the arc surface direction of the side of the arc flange closest to the Luneburg lens sphere.

8. The integrated multi-port feed according to claim 1, characterized in that, The arc-shaped flange and waveguide cavity are made of metal.

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