CN115799840A - Double-frequency end-fire parabolic antenna - Google Patents

Abstract

The invention belongs to the technical field of electronic communication, and discloses a dual-frequency endfire parabolic antenna which comprises an upper metal plate, a lower metal plate, a Sub port, a millimeter wave port, a first waveguide component and a second waveguide component, wherein the upper metal plate and the lower metal plate are oppositely arranged at intervals, a radiation outlet is arranged between the upper metal plate and the lower metal plate, a first parabolic metal reflecting plate is arranged on the top surface of the lower metal plate, the top surface of the first parabolic metal reflecting plate is connected with the upper metal plate, the reflecting surface of the first parabolic metal reflecting plate is arranged corresponding to the radiation outlet, a second parabolic metal reflecting plate is arranged between the first parabolic metal reflecting plate and the radiation outlet, the second parabolic metal reflecting plate is fixed on the lower metal plate, and a gap is formed between the second parabolic metal reflecting plate and the upper metal plate. The invention has the beneficial effects that: the antenna has a simple structure, realizes a shared aperture surface antenna compatible with Sub-6GHz and millimeter wave frequency band multi-beam, and can realize high gain and high aperture efficiency without a complex feed network.

Description

Double-frequency end-fire parabolic antenna

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of electronic communication, in particular to a dual-frequency end-fire parabolic antenna.

[ background of the invention ]

The development of communication systems is moving into the 5G era, and in order to overcome the limitation of bandwidth, the international telecommunications union has authorized several millimeter wave frequency bands, including 24.25-27.5GHz,37-40ghz, and 66-76GHz, for potential 5G communication and other applications. The millimeter wave communication system will play a very important role in the architecture of the future mobile communication system. However, the millimeter wave band communication has problems in that: 1) The path loss is further increased because the millimeter wave is in the atmospheric absorption peak frequency band; 2) Millimeter waves hardly penetrate through solid obstacles, so that the millimeter waves are only transmitted in a visual range, and the millimeter wave transmission quality is poor for an environment with shielding.

In order to solve the problem, currently, a Sub-6GHz band and a millimeter wave band are used as communication media at the same time, wherein the Sub-6GHz band is used for a long-distance and wide-range reliable communication medium, and the millimeter wave band is used for high-speed and high-capacity data transmission, which requires that an antenna can cover both the millimeter wave band and the Sub-6GHz band. Meanwhile, since the path loss of the millimeter wave is taken into consideration, the antenna must have a high gain characteristic at the same time in the millimeter wave frequency band. However, the beam coverage of the high-gain antenna is small, so that the millimeter-wave antenna is often required to obtain a large coverage in the form of multiple beams. Therefore, the shared caliber surface antenna compatible with Sub-6GHz and millimeter wave frequency band multi-beam is an important device at the front end of the receiver.

"adaptive-sharingarrayfor 3.5/28GHz switched antenna shared end fire antenna" discloses a millimeter wave multi-beam/Sub-6 GHz aperture shared end fire antenna, however, it is based on microstrip PCB technology, and at the same time needs relatively complex feed network to realize millimeter wave band multi-beam. "Millimeter-wave antenna matched wave guide emultiti-beam antenna and partially-beam antenna splitter device" discloses that a multi-beam is realized by using a parabolic reflecting surface, but only works in one frequency band.

Therefore, there is a need for a dual-band endfire parabolic antenna that effectively implements a shared aperture surface antenna compatible with Sub-6GHz and millimeter wave band multi-beams, that achieves high gain and high aperture efficiency without the need for complex feed networks, and that is more suitable for use in harsh environments than PCB-based designs.

[ summary of the invention ]

The invention discloses a dual-frequency end-fire parabolic antenna which can effectively solve the technical problems related to the background technology.

In order to realize the purpose, the technical scheme of the invention is as follows:

a dual-frequency endfire parabolic antenna comprises an upper metal plate, a lower metal plate, sub ports, a millimeter wave port, a first waveguide assembly and a second waveguide assembly, wherein the upper metal plate and the lower metal plate are oppositely arranged at intervals, a radiation outlet is formed between the upper metal plate and the lower metal plate, a first parabolic metal reflecting plate is arranged on the top surface of the lower metal plate, the top surface of the first parabolic metal reflecting plate is connected with the bottom surface of the upper metal plate, the reflecting surface of the first parabolic metal reflecting plate is arranged corresponding to the radiation outlet, a second parabolic metal reflecting plate is arranged between the first parabolic metal reflecting plate and the radiation outlet, the bottom surface of the second parabolic metal reflecting plate is fixed on the top surface of the lower metal plate, a gap is formed between the top surface of the second parabolic metal reflecting plate and the upper metal plate, the number of the second parabolic metal reflecting plates is not less than 3, the Sub ports are connected with the input port of the first waveguide assembly, the output port of the first waveguide assembly is arranged corresponding to the reflecting surface of the first parabolic metal reflecting plate, the second waveguide assembly is connected with the millimeter wave port, and the second waveguide assembly is arranged close to the radiation outlet of the second parabolic metal reflecting plate.

As a preferred improvement of the present invention: the Sub port, the millimeter wave port, the first waveguide assembly, and the second waveguide assembly are disposed on the upper metal plate or the lower metal plate.

As a preferred improvement of the present invention: the number of the second paraboloid metal reflecting plates is 4-8 and the second paraboloid metal reflecting plates are arranged in parallel at intervals.

As a preferred improvement of the present invention: the upper metal plate extends upwards to form an upper inclined plate at the radiation outlet, the lower metal plate extends downwards and upwards to form a lower inclined plate at the radiation outlet, the angle between the upper inclined plate and the horizontal plane is 15 degrees, and the angle between the lower inclined plate and the horizontal plane is 15 degrees.

As a preferred improvement of the present invention: the first waveguide assembly is a WR-159 waveguide and the second waveguide assembly is a WR-28 waveguide.

As a preferred improvement of the invention: the upper metal plate and the lower metal plate are arranged at an interval of 4mm, a gap between the top surface of the second parabolic metal reflecting plate and the upper metal plate is 2mm, and a distance between every two adjacent second parabolic metal reflecting plates is 4mm.

As a preferred improvement of the present invention: the geometric dimensions of the first paraboloid metal reflecting plate and the second paraboloid metal reflecting plate are determined by the formula y ² =4fx, where f is the focal length.

As a preferred improvement of the present invention: the focal length of the first paraboloid metal reflecting plate is 50mm, and the focal length of the second paraboloid metal reflecting plate is 60mm.

As a preferred improvement of the present invention: the upper metal plate and the lower metal plate are aluminum plates.

As a preferred improvement of the invention: the upper metal plate and the lower metal plate are fixed through screws.

The invention has the following beneficial effects:

the double-parabolic-reflector antenna is characterized in that a millimeter wave multi-beam antenna and a Sub-6GHz aperture shared end-fire antenna are provided, and two parabolic reflectors are respectively used for calibration (conversion into high-gain plane waves) of Sub-6GHz and mm waveband electromagnetic waves; therefore, high gain and high aperture efficiency can be realized without a complex feed network, the Sub-6GHz parabolic reflecting surface is realized by a total reflection pure metal wall, the millimeter wave parabolic reflecting surface is realized by a metal grid, the metal grid reflects millimeter wave electromagnetic waves, and meanwhile, the Sub-6GHz electromagnetic waves are allowed to freely pass through; therefore, the two parabolic antennas can share the same radiation aperture, mutual interference is small, the multiple input ports are used for feeding the millimeter wave parabolic reflecting surface to achieve multi-beam radiation, and compared with a PCB-based design, the all-metal structure is more suitable for being used in a severe environment.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic diagram of a dual-band end-fire parabolic antenna according to the present invention;

FIG. 2 is a schematic view of the structure of the lower metal plate according to the present invention;

fig. 3 is an explanatory diagram of the operating principle of the antenna of the present invention;

FIG. 4 is a graph showing gain comparison with and without flare angle structure according to the present invention;

FIG. 5 is a radiation pattern of the antenna of the present invention at 4.7-GHz;

FIG. 6 is a radiation pattern of the antenna of the present invention at 28-GHz;

FIG. 7 is a side view of the present invention;

FIG. 8 is a schematic drawing of the dimensions of a lower metal plate according to the present invention;

fig. 9 is a schematic diagram of the size of the upper metal plate according to the present invention.

In the figure: 1-upper metal plate, 11-upper inclined plate, 2-lower metal plate, 21-lower inclined plate, 3-radiation outlet, 4-Sub port, 5-millimeter wave port, 6-first waveguide component, 7-second waveguide component, 8-first paraboloid metal reflecting plate and 9-second paraboloid metal reflecting plate.

[ detailed description ] embodiments

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and back \8230;) in the embodiments of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "connected", "fixed", and the like are to be understood broadly, for example, "fixed" may be fixedly connected, may be detachably connected, or may be integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a dual-band endfire parabolic antenna, which includes an upper metal plate 1, a lower metal plate 2, sub ports 4, a millimeter wave port 5, a first waveguide assembly 6 and a second waveguide assembly 7, wherein the upper metal plate 1 and the lower metal plate 2 are oppositely disposed at an interval, and a radiation outlet 3 is disposed therebetween, a first parabolic metal reflector plate 8 is disposed on a top surface of the lower metal plate 2, a top surface of the first parabolic metal reflector plate 8 is connected to a bottom surface of the upper metal plate 1, and a reflective surface thereof is disposed corresponding to the radiation outlet 3, a second parabolic metal reflector plate 9 is disposed between the first parabolic metal reflector plate 8 and the radiation outlet 3, a bottom surface of the second parabolic metal reflector plate 9 is fixed to the top surface of the lower metal plate 2, a gap is present between the top surface of the second parabolic metal reflector plate 9 and the upper metal plate 1, the number of the second parabolic metal reflector plates 9 is not less than 3, the Sub ports 4 are connected to the first waveguide assembly 6, the output ports of the first waveguide assembly 6 are disposed corresponding to the second waveguide assembly 7, and the second waveguide assembly 7 is disposed adjacent to the radiation outlet 3, and the second parabolic metal reflector plate 8, and the second parabolic metal reflector plate 9 are disposed one by one. In this embodiment, the first waveguide assembly 6 is a WR-159 waveguide, the second waveguide assembly 7 is a WR-28 waveguide, the upper metal plate 1 and the lower metal plate 2 are aluminum plates or aluminum alloy plates, and the upper metal plate 1 and the lower metal plate 2 are fixed by screws.

Specifically, the antenna contains two-layer metal sheet, go up metal sheet 1 with metal sheet 2 down, go up metal sheet 1 with can set up the curb plate down between the metal sheet 2, connect through the mode of joint or spiro union, one side is equipped with the curb plate in the drawing, and one side does not set up the curb plate, and through the test, whether it is less to influence such as electromagnetic wave reflection conduction to set up the curb plate, can ignore. An input port (the Sub port 4) of a Sub-6GHz band and input ports (the millimeter wave ports 5) of 3 millimeter wave bands are arranged on the upper metal plate 1 or the lower metal plate 2. The ports of Sub-6GHz are directly connected with each other by using a WR-159 waveguide for feeding, the input ports of 3 millimeter wave frequency bands are respectively directly connected with each other by using a WR-28 waveguide for feeding, and a flaring structure is used at the position of the radiation exit 3 of the antenna to enlarge the radiation aperture so as to obtain higher gain.

The basic principle of the proposed dual-frequency millimeter wave multi-beam/Sub-6 GH aperture shared end-fire parabolic reflector antenna is shown in fig. 3, two parabolic reflectors are respectively used for converting electromagnetic waves emitted by Sub-6GHz and millimeter wave band feed sources into high-gain plane waves and radiating the plane waves from the radiation exit 3 of the antenna, and the dotted lines in the figure represent propagation paths of the electromagnetic waves. The Sub-6GHz parabolic reflector is realized by using the first parabolic metal reflector 8, and a metal wall is positioned between the upper metal plate 1 and the lower metal plate 2, and simultaneously connects the upper and lower layers of metal, thereby completely blocking the passage of electromagnetic waves. Because the millimeter wave parabolic reflecting surface is positioned in front of the Sub-6GHz parabolic reflecting surface, the millimeter wave parabolic reflecting surface is implemented by using a periodic metal grid to reduce the blockage of the Sub-6GHz electromagnetic waves. The periodic metal grid (the second paraboloidal metal reflecting plate 9 has more than 3 layers) is only connected with the lower metal plate 2, and a gap is formed between the periodic metal grid and the upper metal plate 1. The total reflection of the electromagnetic waves in the millimeter wave frequency band can be realized by using the periodic metal grid, so that a millimeter wave parabolic reflecting surface is formed, and meanwhile, the shielding of the electromagnetic waves in the Sub-6GHz frequency band by the periodic metal grid is small, so that the Sub-6GHz electromagnetic waves can pass through the periodic metal grid to be radiated from the radiation outlet 3 of the antenna.

In order to better study the bandgap effect of the periodic metal gate, the corresponding bandgap region of the cell was obtained using eigenmode simulation at AnsysHFSS. In the test, the height of the metal grid is 2mm, the size of the air gap between the metal grid and the top metal is 2mm, and the period of the grating (the distance from the center to the center of two adjacent plates) is selected to be 4mm. The results show that the dispersion curve of the proposed grating is almost the same as the light cone line in the Sub-6GHz band, indicating that Sub-6GHz electromagnetic waves can be transmitted through a periodic metal grating. When the frequency is increased, the dispersion curve of the metal grating unit gradually deviates from the light cone line, the cut-off frequency is finally reached, and the position of the band gap region can be adjusted by adjusting the period and the height of the metal grating. Since the millimeter wave operating frequency is from 26 to 30GHz in the design, the starting frequency of the bandgap is tuned to 22GHz. In the band gap region, the electromagnetic wave is totally reflected. Thus, a metal grating may be used to form a millimeter-wave parabolic reflector. Ideally, perfect reflection can be achieved by using an infinite period metal grating. Preferably, four layers of metal plates are used to form the parabolic reflector, providing sufficient reflection and maintaining compact parabolic reflector dimensions.

And a single feed source is placed on the focus of the Sub-6GHz parabolic reflecting surface to realize single-beam high-gain radiation of the Sub-6GHz band, and a plurality of feed sources are arranged near the focus of the millimeter wave parabolic reflecting surface to realize multi-beam radiation. When the feed is not at the focus of the parabolic reflector, the fields in the aperture plane will no longer be in phase and the beam will perform the function of deflection. The directions of the electromagnetic waves of different millimeter wave ports emitted from the radiation outlet 3 of the antenna are different, so that the beams of the antenna can be deflected, and the central working frequencies of Sub-6GHz and millimeter wave bands in the design are respectively 4.8GHz and 28GHz.

Figure 4 shows the gain of the antenna with and without the flare structure, with the peak gain in the millimeter band increasing from 16.5dBi to 24.8dBi and the gain in the sub-6GHz band increasing from 6.2dBi to 11.2dBi by enlarging the radiating aperture. And after the flaring structure is used, the gain curve of the Sub-6GHz wave band becomes more stable. FIG. 5 is a radiation pattern of the antenna in the Sub-6GHz band (4.7 GHz frequency point), the antenna radiates well, which shows that the millimeter wave reflection plane has little shielding on the electromagnetic wave in the Sub-6GHz band. Fig. 6 shows the directional diagrams when the ports 1-3 are excited respectively, and the deflection angles of 3 beams are 0 ° (port 1 excitation), -12 ° (port 2 excitation) and-18 ° (port 3 excitation) respectively, so that the multi-beam function is realized.

As an embodiment, the Sub port 4, the millimeter wave port 5, the first waveguide assembly 6, and the second waveguide assembly 7 are disposed on the upper metal plate 1 or the lower metal plate 2. The positions of the Sub port 4, the millimeter wave port 5, the first waveguide assembly 6 and the second waveguide assembly 7 can be freely rotated and can be mounted on the upper metal plate 1 or the lower metal plate 2, as long as the electromagnetic waves are ensured to be emitted to the corresponding reflecting surfaces.

As an embodiment, the number of the second paraboloid metal reflecting plates 9 is 4-8, and the second paraboloid metal reflecting plates 9 are arranged in parallel and at intervals, and a periodic metal grid can be used to realize total reflection of the electromagnetic wave in the millimeter wave frequency band, thereby forming a millimeter wave parabolic reflecting surface, and preferably, the number of the second paraboloid metal reflecting plates 9 is 4.

In one embodiment, the upper metal plate 1 extends upward at the radiation exit 3 to form an upper inclined plate 11, the lower metal plate 2 extends downward and upward at the radiation exit 3 to form a lower inclined plate 21, and the upper inclined plate 11 has an angle of 15 ° with the horizontal plane, and the lower inclined plate 21 has an angle of 15 ° with the horizontal plane, and an opening angle of 30 ° can improve the antenna gain. The degree and the size of the field angle can be other values according to actual conditions, and the larger the field angle area is, the higher the gain of the antenna is.

Fig. 7 to 9 are schematic diagrams of the dimensions of the structures in the present embodiment, where h1=4mm, h2=20mm, h3=80mm, h4=2mm, h5=4mm, l2=38mm, l4=68mm, l5=135mm, l6=135mm, l7=68mm, l8=220mm, l9= 2450 mm, l10=152mm, l11=100mm, and θ =30 °. The upper metal plate 1 and the lower metal plate 2 are arranged at an interval of 4mm, a gap between the top surface of the second parabolic metal reflecting plate 9 and the upper metal plate 1 is 2mm, and a distance between the adjacent second parabolic metal reflecting plates 9 is 4mm. Generally, to ensure that only slab mode exists between two layers of metal, the height between the two layers of metal should be at least less than λ g/2, where λ g is the shortest medium wavelength of the highest operating band. Thus, while 4mm is used in this embodiment, heights below 4mm may also be used.

The geometric dimensions of the first paraboloid metal reflecting plate 8 and the second paraboloid metal reflecting plate 9 are determined by the formula y ² =4fx, where f is the focal length. The focal length of the first parabolic metal reflector 8 is 50mm, and the focal length of the second parabolic metal reflector 9 is 60mm.

Specifically, the two parabolic reflecting surfaces are respectively used for calibrating electromagnetic waves emitted by Sub-6GHz and millimeter wave band feed sources into plane waves, and the focal lengths corresponding to the two parabolic reflecting surfaces can be independently selected, so that the positions of the two frequency band feed sources can be independently set, and the design freedom degree is greatly improved. In the present embodiment, the focal lengths are selected to be 50 and 60 millimeters, respectively. The Sub-6GHz parabolic reflecting surface is realized by using an all-metal wall, and the metal wall is positioned between an upper layer metal and a lower layer metal and is connected with the upper layer metal and the lower layer metal at the same time, so that the electromagnetic waves are completely blocked from passing through. Because the millimeter wave parabolic reflecting surface is positioned in front of the Sub-6GHz parabolic reflecting surface, the millimeter wave parabolic reflecting surface is implemented by using a periodic metal grid to reduce the blockage of the Sub-6GHz electromagnetic waves. The periodic metal grid is only connected with the lower layer metal but not connected with the upper layer metal, a gap exists between the periodic metal grid and the upper layer metal, the height of the gap is 2mm, and the height of the periodic metal grid is 2mm. The band gap of the periodic metal grating can be tuned to the millimeter wave region by appropriate selection of the period and height of the metal grating. Thus, the parabolic reflective surface in the millimeter wave band allows Sub-6GHz electromagnetic waves to pass through while still reflecting millimeter wave electromagnetic waves.

The working principle is as follows: corresponding electromagnetic waves are input into the Sub port 4 and the millimeter wave port 5, transmitted to the first parabolic metal reflector 8 and the second parabolic metal reflector 9 through the first waveguide assembly 6 and the second waveguide assembly 7, and reflected and emitted from the radiation outlet 3.

The existing shared aperture surface antenna compatible with Sub-6GHz and millimeter wave frequency bands realizes high gain of millimeter waves in an array mode, but a feed network of the array is complex, and extra loss is brought at the same time. And existing designs rarely achieve high gain at Sub-6 GHz. The invention effectively realizes the shared aperture surface antenna compatible with Sub-6GHz and millimeter wave frequency band multi-beam by combining the parabolic reflector antennas with two different structures. High gain and high aperture efficiency can be achieved without the need for complex feed networks. Furthermore, the all-metal structure is more suitable for use in harsh environments than PCB-based designs.

While embodiments of the invention have been described above, it is not intended to be limited to the details shown herein, and to the particular embodiments shown, but it is to be understood that all changes and modifications that come within the spirit and scope of the invention are desired to be protected by the teachings herein.

Claims (10)

1. A dual-band endfire parabolic antenna, comprising: the microwave waveguide fiber grating comprises an upper metal plate (1), a lower metal plate (2), sub ports (4), a millimeter wave port (5), a first waveguide component (6) and a second waveguide component (7), wherein the upper metal plate (1) and the lower metal plate (2) are oppositely arranged at intervals, a radiation outlet (3) is formed between the upper metal plate (1) and the lower metal plate, a first parabolic metal reflecting plate (8) is arranged on the top surface of the lower metal plate (2), the top surface of the first parabolic metal reflecting plate (8) is connected with the bottom surface of the upper metal plate (1), the reflecting surface of the first parabolic metal reflecting plate is arranged corresponding to the radiation outlet (3), a second parabolic metal reflecting plate (9) is arranged between the first parabolic metal reflecting plate (8) and the radiation outlet (3), the bottom surface of the second parabolic metal reflecting plate (9) is fixed on the top surface of the lower metal plate (2), a gap exists between the top surface of the second parabolic metal reflecting plate (9) and the upper metal plate (1), the number of the second parabolic metal reflecting plates (9) is not less than 3, the number of the Sub ports (4) is not less than 3), the first parabolic metal reflecting plate (6) is connected with the first waveguide component, the waveguide component (7) and the first parabolic metal reflecting plate (8) are correspondingly arranged corresponding to the waveguide component, and the waveguide fiber grating component, and the waveguide component are arranged corresponding to the waveguide component, the output port of the second waveguide assembly (7) is arranged corresponding to the reflecting surface of the second paraboloid metal reflecting plate (9) closest to the radiation outlet (3).

2. The dual-band endfire parabolic antenna of claim 1, wherein: the Sub port (4), the millimeter wave port (5), the first waveguide assembly (6), and the second waveguide assembly (7) are provided on the upper metal plate (1) or the lower metal plate (2).

3. The dual-band endfire parabolic antenna of claim 1, wherein: the number of the second paraboloid metal reflecting plates (9) is 4-8 and the second paraboloid metal reflecting plates are arranged in parallel at intervals.

4. The dual-band endfire parabolic antenna of claim 1, wherein: the upper metal plate (1) extends upwards at the radiation outlet (3) to form an upper inclined plate (11), the lower metal plate (2) extends downwards and upwards at the radiation outlet (3) to form a lower inclined plate (21), the angle between the upper inclined plate (11) and the horizontal plane is 15 degrees, and the angle between the lower inclined plate (21) and the horizontal plane is 15 degrees.

5. The dual-band endfire parabolic antenna of claim 1, wherein: the first waveguide assembly (6) is a WR-159 waveguide and the second waveguide assembly (7) is a WR-28 waveguide.

6. The dual-band endfire parabolic antenna of claim 1, wherein: the upper metal plate (1) and the lower metal plate (2) are arranged at an interval of 4mm, a gap between the top surface of the second parabolic metal reflecting plate (9) and the upper metal plate (1) is 2mm, and a distance between the adjacent second parabolic metal reflecting plates (9) is 4mm.

7. The dual-band endfire parabolic antenna of claim 1, wherein: the geometric dimensions of the first paraboloid metal reflecting plate (8) and the second paraboloid metal reflecting plate (9) are determined by the formula y ² =4fx, where f is the focal length.

8. The dual-band endfire parabolic antenna of claim 7, wherein: the focal length of the first paraboloid metal reflecting plate (8) is 50mm, and the focal length of the second paraboloid metal reflecting plate (9) is 60mm.

9. The dual-band endfire parabolic antenna of claim 1, wherein: the upper metal plate (1) and the lower metal plate (2) are aluminum plates.

10. The dual-band endfire parabolic antenna of claim 1, wherein: the upper metal plate (1) and the lower metal plate (2) are fixed through screws.

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