Small size broadband ridge waveguide antenna

Abstract

The present disclosure provides a small-size broadband ridge waveguide antenna, comprising: an electrical signal input port, used to receive an external feeding signal and send the feeding signal to a waveguide power divider; the waveguide power divider, comprising: a metal feeding component and a waveguide cavity; the metal feeding component, comprising a stepped feeding head, used to convert the feeding signal into a feeding signal of different excitations through the stepped feeding head to excite electromagnetic waves; the waveguide cavity, used to transmit electromagnetic waves; and the metal ridge waveguide, used to send electromagnetic waves to the outside of the antenna.

Description

Technical Field

[0001] The present disclosure relates to the field of ridge waveguide slot antennas, and in particular to a small-sized broadband ridge waveguide antenna. Background Art

[0002] Broadband ridge waveguide antenna is a product born with the development of radar system. It is based on ground-based air defense radar. With the continuous advancement of science and technology, the application of broadband ridge waveguide antenna is becoming more and more extensive. The slots of broadband ridge waveguide antenna used in related technologies include inclined slots opened on the narrow side of the waveguide, longitudinal slots opened on the wide side of the waveguide, transverse slots, and inclined slots opened on the center line of the wide side of the waveguide. They can be either resonant or non-resonant. These slots cut the surface current to radiate energy to the external space. By carefully selecting the number, position, size, and arrangement of the slots, various practical antenna patterns can be produced. In related technologies, broadband ridge waveguide antennas can be divided into several units and fed through the waveguide power divider at the rear. The antenna uses the form of ridge waveguide to reduce the size of the waveguide, but it cannot achieve the effect of low side lobes. In addition, the waveguide power divider is used for feeding, which results in a larger overall size of the antenna. At present, there is no ridge waveguide slot antenna that can better meet the requirements of transmitting electromagnetic waves while reducing the volume. Summary of the invention

[0003] In view of this, the main purpose of the present disclosure is to provide a small-sized broadband ridge waveguide antenna, in order to partially solve at least one of the above-mentioned technical problems.

[0004] The present disclosure provides a small-size broadband ridge waveguide antenna, comprising:

[0005] The electrical signal input port is used to receive an external feeding signal and send the feeding signal to the waveguide power divider; the waveguide power divider includes: a metal feeding component and a waveguide cavity; the above-mentioned metal feeding component includes a stepped feeding head, which is used to convert the above-mentioned feeding signal into the above-mentioned feeding signal with different excitations through the above-mentioned stepped feeding head to excite electromagnetic waves; the above-mentioned waveguide cavity is used to transmit the above-mentioned electromagnetic waves; the metal ridge waveguide is used to send the above-mentioned electromagnetic waves to the outside of the antenna.

[0006] According to an embodiment of the present disclosure, the antenna further includes:

[0007] The size parameters of the stepped feeding head meet the first preset condition; the first preset condition is determined according to the parameters of the metal ridge waveguide and the parameters of the electromagnetic wave.

[0008] According to an embodiment of the present disclosure, the stepped feeding head includes three steps.

[0009] According to an embodiment of the present disclosure, the metal ridge waveguide includes: a plurality of ridge waveguide units.

[0010] The above-mentioned ridge waveguide units are all single-ridge waveguides; and the above-mentioned multiple ridge waveguide units are sequentially arranged in a preset straight line direction.

[0011] According to an embodiment of the present disclosure, the antenna further includes:

[0012] The above-mentioned ridge waveguide units are respectively connected to one of the above-mentioned waveguide power dividers; a partial waveguide cavity of the above-mentioned waveguide power divider is arranged inside the single ridge of the above-mentioned ridge waveguide unit, and the wall of the above-mentioned single ridge waveguide is the cavity wall of the above-mentioned partial waveguide cavity.

[0013] According to an embodiment of the present disclosure, the ridge waveguide unit includes: a plurality of slots.

[0014] The multiple slots are arranged on the waveguide surface opposite to the single ridge and penetrate the waveguide surface; the multiple slots are arranged in sequence on the symmetry axis of the waveguide surface in the preset straight line direction to transmit the electromagnetic waves to the outside of the antenna.

[0015] According to an embodiment of the present disclosure, the antenna further includes:

[0016] The size parameters of the above-mentioned multiple gaps meet the second preset condition; the above-mentioned second preset condition is determined according to the above-mentioned electromagnetic wave parameters.

[0017] According to an embodiment of the present disclosure, the antenna further includes:

[0018] The metal connection medium between the plurality of waveguide power dividers connected to the ridge waveguide units is hollowed out.

[0019] According to an embodiment of the present disclosure, the antenna further includes:

[0020] The metal ridge waveguide is provided with fixing interfaces at both ends of the preset straight line direction for fixing the antenna.

[0021] According to an embodiment of the present disclosure, the metal ridge waveguide includes: 4 ridge waveguide units, each ridge waveguide unit is connected to one of the waveguide power dividers; the ridge waveguide unit includes 4 slots, the slot length is 18.5 mm, and the slot width is 3.7 mm.

[0022] Based on the above technical solutions, it can be seen that the embodiments of the present disclosure have the following beneficial effects compared with the prior art:

[0023] The small-sized broadband ridge waveguide antenna can convert the feed signal into a feed signal with different excitations through a stepped feed head to excite electromagnetic waves; and send electromagnetic waves to the outside of the antenna through a metal ridge waveguide. The design of the stepped feed head in the waveguide power divider can optimize impedance matching, achieve a small size while having a good impedance matching coefficient in a broadband range, and ensure good directional pattern characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structural diagram of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown;

[0025] Figure 2 A schematic diagram schematically shows the overlap of a waveguide power divider and a metal ridge waveguide of a small-size broadband ridge waveguide antenna according to an embodiment of the present disclosure;

[0026] Figure 3 The figure schematically shows the external dimensions of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure;

[0027] Figure 4 The schematic diagram of the dimensions of the stepped feed head of the small-sized broadband ridge waveguide antenna according to the embodiment of the present disclosure is schematically shown;

[0028] Figure 5 A schematic diagram of a simulation of the standing wave ratio of a four-unit waveguide antenna port of a small-size broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown;

[0029] Figure 6 A schematic diagram of a simulation of the elevation gain of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown;

[0030] Figure 7 The schematic diagram of azimuth directional gain simulation of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown;

[0031] Figure 8 A schematic diagram of electromagnetic wave amplitude in the elevation direction of a small-sized broadband ridge waveguide antenna array according to an embodiment of the present disclosure is schematically shown;

[0032] Fig. 9 A schematic diagram of the electromagnetic wave amplitude in the azimuth direction of a small-sized broadband ridge waveguide antenna array according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0033] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0034] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0035] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0036] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0037] Among the antenna forms of related technologies, broadband ridge waveguide antennas have become a commonly used antenna form due to their high bandwidth, stable structure, good scanning performance, and easy integration. In order to optimize the performance of waveguide slot antennas, relevant technicians have conducted many studies on reducing the azimuth dimension while ensuring that the antenna maintains good matching characteristics and directional pattern. The existing methods generally adopt the method of adding ridges in the waveguide to change the transmission mode of electromagnetic waves in the waveguide, thereby achieving lower frequency electromagnetic excitation and propagation in a narrower dimension.

[0038] In the related art, the broadband ridge waveguide antenna can be divided into several units and fed through the waveguide power divider at the rear. The antenna uses the ridge waveguide to reduce the waveguide size, but it cannot achieve the effect of low side lobes. In addition, the use of the waveguide power divider for feeding leads to a larger overall size of the antenna. At present, there is no ridge waveguide slot antenna that can meet the requirements of transmitting electromagnetic waves while reducing the size.

[0039] In order to at least partially solve the technical problems existing in the related art, the present disclosure provides a small-sized broadband ridge waveguide antenna, which includes: an electrical signal input port, a waveguide power divider and a metal ridge waveguide.

[0040] The electrical signal input port is used to receive an external feeding signal and send a feeding signal to the waveguide power divider.

[0041] The waveguide power divider includes: a metal feeding component and a waveguide cavity. The metal feeding component includes a stepped feeding head, which is used to convert a feeding signal into a feeding signal with different excitations through the stepped feeding head to excite electromagnetic waves. The waveguide cavity is used to transmit electromagnetic waves.

[0042] The metal ridge waveguide is used to transmit the electromagnetic wave to the outside of the antenna.

[0043] According to an embodiment of the present disclosure, the electrical signal input port can be connected to a coaxial cable, and an external feed signal is sent to the waveguide power divider through the coaxial cable. The parameter values ​​of the external feed signal, such as the current and amplitude strength, which characterize the electromagnetic wave excited by the feed signal, can be adjusted according to actual needs. The electrical signal input port can also obtain the external feed signal through other transmission media.

[0044] According to the embodiments of the present disclosure, the metal feeding component in the waveguide power divider can be excited to obtain electromagnetic waves according to the external feeding signal. By refining and improving the structure of the metal feeding component, the matching parameters in the process of generating electromagnetic waves by excitation of the external feeding signal are changed to obtain the electromagnetic wave parameters actually required.

[0045] According to the embodiments of the present disclosure, the size of the metal ridge waveguide can be adjusted according to actual needs. After determining the size of the metal ridge waveguide, the transmission waveguide wavelength range of the metal ridge waveguide can be determined. Based on the size of the metal ridge waveguide and the actually required electromagnetic wave parameters, the size of the metal ridge waveguide can be optimized so that the electromagnetic wave can be obtained by converting the feeding signals of different excitations obtained by the waveguide power divider, thereby achieving better impedance matching characteristics and directivity performance under the actually required working bandwidth of the electromagnetic wave.

[0046] According to an embodiment of the present disclosure, a metal ridge waveguide includes: a plurality of ridge waveguide units.

[0047] The ridge waveguide units are all single-ridge waveguides; and a plurality of ridge waveguide units are sequentially arranged in a preset straight line direction.

[0048] According to the embodiments of the present disclosure, the existing rectangular waveguide has a high cutoff frequency when transmitting electromagnetic field energy, so the minimum frequency requirement of the electromagnetic field is high and cannot meet the actual needs well. The use of rectangular waveguides for transmission may also cause the width of small-sized broadband ridge waveguide antennas to exceed the size limit, so a single-ridge waveguide is selected for transmission. Selecting a single-ridge waveguide can change the electromagnetic field within the single-ridge waveguide and limit the propagation range of the electromagnetic field while obtaining electromagnetic waves with a lower cutoff frequency, so that the electromagnetic field shrinks to achieve a reduction in the volume of the ridge waveguide unit.

[0049] According to an embodiment of the present disclosure, a ridge is added to the inside of the waveguide to obtain a single-ridge waveguide, which can be improved based on the shape of a rectangular waveguide by bending the wide wall of the rectangular waveguide. The metal ridge waveguide can be a three-dimensional waveguide similar to a cube shape.

[0050] According to the embodiments of the present disclosure, taking into account the process level in the related art and satisfying the actual processing strength requirements, a single-ridge waveguide with a waveguide wall thickness of 0.7 mm can be selected.

[0051] According to an embodiment of the present disclosure, a ridge waveguide unit includes: a plurality of slots.

[0052] A plurality of slots are arranged on a waveguide surface opposite to the single ridge on the single-ridge waveguide and penetrate through the waveguide surface.

[0053] A plurality of slots are arranged in sequence on the symmetry axis of the waveguide surface in a preset straight line direction, and are used to send magnetic waves to the outside of the antenna.

[0054] According to the embodiments of the present disclosure, the waveguide surface opposite to the single ridge on the single ridge waveguide can be used as a reference, and the size of the longer side of the rectangular waveguide surface can be set to the size corresponding to the length of the metal ridge waveguide; the size of the shorter side of the rectangular waveguide surface can be set to the size corresponding to the width of the metal ridge waveguide; the size in the direction perpendicular to the plane where the rectangular waveguide surface is located can be set to the size corresponding to the width of the metal ridge waveguide, that is, the size corresponding to the thickness of the metal ridge waveguide. The direction of the longer side of the rectangular waveguide surface can also be set to the preset straight line direction.

[0055] According to an embodiment of the present disclosure, the antenna further includes: size parameters of the plurality of slots satisfy a second preset condition; and the second preset condition can be determined according to electromagnetic wave parameters.

[0056] According to the embodiments of the present disclosure, fine-tuning of the electromagnetic waves transmitted outward can be achieved by setting the number and size of the gaps on the ridge waveguide unit, so as to obtain electromagnetic waves that meet different practical needs.

[0057] According to an embodiment of the present disclosure, 2-8 slots may be set on the ridge waveguide unit in consideration of the process level of the related technology and in order to meet the actual needs for transmitting electromagnetic waves.

[0058] According to an embodiment of the present disclosure, the antenna further includes:

[0059] The ridge waveguide units are respectively connected to a waveguide power divider; a part of the waveguide cavity of the waveguide power divider is arranged inside the single ridge of the ridge waveguide unit, and the wall of the single ridge waveguide is the cavity wall of the part of the waveguide cavity.

[0060] According to the embodiments of the present disclosure, a structure composed of a ridge waveguide unit and a waveguide power divider can be used as an antenna unit, and part of the structure of the waveguide power divider can be embedded inside the single ridge of the ridge waveguide unit, so that the space inside the single ridge of the ridge waveguide unit can be effectively utilized. Part of the volume of the ridge waveguide unit overlaps with part of the volume of the waveguide power divider, and this integrated overlapping design can further reduce the width and thickness of the antenna unit.

[0061] According to an embodiment of the present disclosure, the antenna further includes:

[0062] The size parameters of the stepped feeding head in the waveguide power divider meet the first preset condition; the first preset condition is determined according to the parameters of the metal ridge waveguide and the parameters of the electromagnetic wave.

[0063] According to the embodiments of the present disclosure, after determining the parameters of the metal ridge waveguide and the electromagnetic wave parameters actually required, the parameter that mainly affects the impedance matching in the process of the feeding signal exciting the electromagnetic wave is the size of the stepped feeding head. In order to achieve better matching characteristics within the actually required frequency band, the size of the stepped feeding head can be refined.

[0064] According to an embodiment of the present disclosure, taking into account the process level of related technologies and meeting actual needs for transmitting electromagnetic waves, the stepped feeding head can be set to have three steps, and the specific size parameters of the steps can be determined based on the parameters of the metal ridge waveguide and the parameters of the electromagnetic waves actually required.

[0065] According to the embodiments of the present disclosure, in consideration of the process level of the related art and the electromagnetic waves emitted to meet the actual needs, the length of the metal ridge waveguide, the number of ridge waveguide units included in the metal ridge waveguide, and the number of gaps on the ridge waveguide units cannot be increased infinitely.

[0066] Reference below Figure 1 to Figure 4 , the small-size broadband ridge waveguide antenna structure is further explained in conjunction with a specific embodiment.

[0067] Figure 1 The overall structural diagram of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown.

[0068] like Figure 1As shown, the small-size broadband ridge waveguide antenna may include four antenna units, each of which includes a ridge waveguide unit and a waveguide power divider. The four ridge waveguide units are connected to each other and arranged in the same straight line direction. The four waveguide power dividers are overlapped and connected to the corresponding ridge waveguide units, and a metal connection medium is also included between the four waveguide power dividers.

[0069] According to an embodiment of the present disclosure, the antenna further includes:

[0070] The metal ridge waveguide is provided with fixed interfaces at both ends of a preset straight line direction for fixing the antenna.

[0071] According to an embodiment of the present disclosure, the antenna further includes:

[0072] The metal connection medium between the plurality of waveguide power dividers connected to the ridge waveguide units is hollowed out.

[0073] According to the embodiments of the present disclosure, taking into account the process level in the related art and satisfying the actual processing strength requirements, the metal connection medium is hollowed out to reduce the overall weight of the small-sized broadband ridge waveguide antenna and save resources.

[0074] According to an embodiment of the present disclosure, each of the four waveguide power dividers includes a metal feeding component and a waveguide cavity. Part of the waveguide cavity is embedded in a single ridge of the corresponding ridge waveguide unit, and the metal feeding component is arranged at the end opposite to the single ridge and connected to the electrical signal input port.

[0075] Figure 2 A schematic diagram of the overlap of a waveguide power divider and a metal ridge waveguide of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown.

[0076] like Figure 2 As shown, the large frame includes a waveguide power divider, one end of the waveguide power divider is connected to the metal ridge waveguide, part of the waveguide cavity is arranged inside the single ridge of the ridge waveguide unit, and part of the waveguide cavity shares a wall with the single ridge of the ridge waveguide unit, which can reduce the width and thickness of the antenna unit. The other end of the waveguide power divider is connected to the electrical signal input port. The small frame includes a stepped feed head in the waveguide power divider, and the stepped feed head is connected to the electrical signal input port.

[0077] According to the embodiments of the present disclosure, when the actual working bandwidth of electromagnetic waves is required to be 8.6-10.6 GHz, the antenna size can be optimized based on the half-wavelength of the lowest frequency in the working bandwidth and the overall structure and processing difficulty of the small-size broadband ridge waveguide antenna.

[0078] Figure 3 The figure schematically shows the external dimensions of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure.

[0079] like Figure 3 As shown, based on the actual required working bandwidth of the electromagnetic wave and the structural design of the small-size broadband ridge waveguide antenna, the width of the small-size broadband ridge waveguide antenna can be set to not exceed 16 mm, the length to not exceed 340 mm, and the thickness to not exceed 37 mm.

[0080] According to the embodiments of the present disclosure, based on the actual required working bandwidth of the electromagnetic wave and the energy distribution of the electromagnetic wave when it is emitted outward, a small-sized broadband ridge waveguide antenna can be set to include 4 antenna units, each of which includes 4 slots. The slots are arranged on the symmetry axis in the width direction of the small-sized broadband ridge waveguide antenna, each slot is 18.5 mm long and 3.7 mm wide, and the slot spacing can be appropriately adjusted according to the energy distribution of the electromagnetic wave when it is emitted outward.

[0081] Figure 4 The schematic diagram of the dimensions of a stepped feeding head of a small-sized broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown.

[0082] like Figure 4 As shown, based on the actual required working bandwidth of the electromagnetic wave and the structural design of the small-size broadband ridge waveguide antenna, the stepped feed head can be set to a three-step ladder, and the step is obtained by structural optimization of a cubic metal medium with a length of 4.7 mm, a width of 3.7 mm and a height of 11.1 mm.

[0083] According to an embodiment of the present disclosure, a first step is provided at one end of the stepped feeding head away from the electrical signal input port, the plane of the first step is a rectangle with a length of 4.7 mm and a width of 0.9 mm, and the height of the first step is 2.5 mm. The second step extends outward by 1.1 mm compared to the first step, and the height of the second step is 4.8 mm. The third step extends outward by 1.7 mm compared to the second step, and the height of the third step is 3.8 mm. The stepped feeding head can also be hollowed out at the end connected to the electrical signal input port, removing a cubic metal medium with a length of 4.7 mm, a width of 1 mm, and a height of 3.6 mm, and the removal position is opposite to the direction in which the step extends outward.

[0084] Reference below Figures 5 to 9 , the good radiation pattern characteristics of the small-size broadband ridge waveguide antenna are further explained in combination with specific embodiments.

[0085] Figure 5 A schematic diagram of a simulation of the standing wave ratio of a four-unit waveguide antenna port of a small-size broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown.

[0086] like Figure 5As shown in the figure, after determining the size of the small-size broadband ridge waveguide antenna, the standing wave ratio reflection coefficient of each antenna unit port is less than 1.5 within the 2 GHz bandwidth range of 8.6-10.6 GHz. Among them, VSWR1-VSWR4 represent the standing wave ratio reflection coefficients of the four antenna units respectively.

[0087] According to the embodiments of the present disclosure, in actual use, the plane where the width direction of the small-size broadband ridge waveguide antenna is located is parallel to the horizontal plane, and the plane where the length direction of the small-size broadband ridge waveguide antenna is located is perpendicular to the horizontal plane. The width direction of the small-size broadband ridge waveguide antenna is set as the azimuth direction, and the length direction of the small-size broadband ridge waveguide antenna is set as the elevation direction.

[0088] Figure 6 A schematic diagram of the elevation directional gain simulation of a small-size broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown.

[0089] Figure 7 A schematic diagram of azimuth directional gain simulation of a small-size broadband ridge waveguide antenna according to an embodiment of the present disclosure is schematically shown.

[0090] like Figure 6 and Figure 7 As shown, after determining the size of the small-size broadband ridge waveguide antenna, the elevation directional gain and azimuth directional gain simulated in the bandwidth range of 8.6-10.6 GHz of the small-size broadband ridge waveguide antenna are approximately symmetrical, and the radiation pattern index is good.

[0091] According to the embodiments of the present disclosure, in actual use, the small-sized broadband ridge waveguide antennas can be arranged in the width direction to form a small-sized broadband ridge waveguide antenna array. 96 small-sized broadband ridge waveguide antennas can be arranged and assembled to obtain a small-sized broadband ridge waveguide antenna array.

[0092] According to an embodiment of the present disclosure, the metal ridge waveguide is provided with fixing interfaces at both ends in the length direction, which are used to fix the antenna when assembling the antenna array. The fixing interfaces in the length direction further reduce the size of the antenna array in the width direction.

[0093] Figure 8 The schematic diagram of the electromagnetic wave amplitude in the elevation direction of a small-sized broadband ridge waveguide antenna array according to an embodiment of the present disclosure is schematically shown.

[0094] like Figure 8 As shown, when the small-size broadband ridge waveguide antenna array operates at a frequency of 9.6 GHz, the beam pointing direction in the elevation direction is 0.037°, the amplitude of the first sidelobe on the left is -13.55 dB, the amplitude of the first sidelobe on the right is -13.67 dB, the 3dB beam width is 4.49°, and the radiation pattern indicators are good.

[0095] Fig. 9 A schematic diagram of the electromagnetic wave amplitude in the azimuth direction of a small-sized broadband ridge waveguide antenna array according to an embodiment of the present disclosure is schematically shown.

[0096] like Fig. 9 As shown, when the small-size broadband ridge waveguide antenna array operates at a frequency of 9.6 GHz, the beam pointing direction in the azimuth direction is -0.009°, the amplitude of the first sidelobe on the left is -12.79 dB, the amplitude of the first sidelobe on the right is -12.98 dB, the 3dB beam width is 1.28°, the directivity index is good, and the azimuth direction has a one-dimensional large-angle scanning capability.

[0097] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small-size broadband ridge waveguide antenna, comprising: An electrical signal input port, used to receive an external feeding signal and send the feeding signal to the waveguide power divider; A waveguide power divider, comprising: a metal feeding component and a waveguide cavity; The metal feeding assembly comprises a stepped feeding head, which is used to convert the feeding signal into a feeding signal of different excitations through the stepped feeding head to excite electromagnetic waves; The waveguide cavity is used to transmit the electromagnetic wave; and A metal ridge waveguide, used for transmitting the electromagnetic wave to the outside of the antenna; The antenna also includes: The size parameters of the stepped feeding head meet the first preset condition; The first preset condition is determined according to the parameters of the metal ridge waveguide and the parameters of the electromagnetic wave; Wherein, the stepped feeding head comprises three steps; Wherein, the metal ridge waveguide comprises: a plurality of ridge waveguide units; The ridge waveguide units are all single ridge waveguides; The plurality of ridge waveguide units are sequentially arranged in a preset straight line direction; The antenna also includes: The ridge waveguide units are respectively connected to one of the waveguide power dividers; and A portion of the waveguide cavity of the waveguide power divider is arranged inside the single ridge of the ridge waveguide unit, and the wall of the single ridge waveguide is the cavity wall of the portion of the waveguide cavity.

2. The antenna according to claim 1, wherein: The ridge waveguide unit comprises: a plurality of slots; The plurality of slots are disposed on the waveguide surface opposite to the single ridge and penetrate the waveguide surface; and The multiple slots are sequentially arranged on the symmetry axis of the waveguide surface in the preset straight line direction to transmit the electromagnetic waves to the outside of the antenna.

3. The antenna according to claim 2, further comprising: The size parameters of the plurality of gaps satisfy a second preset condition; The second preset condition is determined according to the parameters of the electromagnetic wave.

4. The antenna according to claim 1, further comprising: The metal connection medium between the plurality of waveguide power dividers to which the ridge waveguide units are respectively connected is hollowed out.

5. The antenna according to claim 1, further comprising: The metal ridge waveguide is provided with fixing interfaces at both ends of the preset straight line direction for fixing the antenna.

6. The antenna according to claim 1, wherein: The metal ridge waveguide comprises: 4 ridge waveguide units, each ridge waveguide unit is connected to one of the waveguide power dividers; The ridge waveguide unit includes 4 slots, each of which is 18.5 mm long and 3.7 mm wide.

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