Narrow-side traveling wave waveguide slot array antenna

Abstract

The invention relates to the technical field of scatter communication, in particular to a narrow-edge traveling wave waveguide slot array antenna. Comprising an antenna housing which adopts a flanging design to protect an antenna surface; the slot radiation port is composed of a rectangular port array with horizontal short edges; the coupled feed port is composed of a rectangular port array with horizontal short edges; and the power division network is formed by cascading H-surface T-shaped power dividers and is formed by equally-divided and unequally-divided one-to-two power dividers. The problems that an existing panel antenna is low in gain, large in size and heavy in weight are solved.

Description

[Technical field]

[0001] The invention relates to the technical field of scattering communication, and in particular to a narrow-side traveling waveguide slot array antenna. [Background technology]

[0002] Scattering communication is a way to achieve beyond-line-of-sight communication by utilizing the scattering effect of radio waves by the inhomogeneous medium in the atmosphere. It has become an indispensable means in strategic and tactical communications due to its strong ability to resist destruction, interference, interception and nuclear explosion.

[0003] Since scattering communication is transmitted through inhomogeneous media such as the troposphere and ionosphere, it faces challenges such as transmission loss and signal fading. It requires a high-power transmitter, a high-gain antenna, and a high-sensitivity receiver to complete the communication. Usually, the high-gain antenna has a large diameter and weight.

[0004] At present, the flat panel antennas used in scattering communication are mainly used on command vehicles and on individual soldiers. The flat panel antennas on individual soldiers' backs have new requirements for weight and size while meeting the requirements of high gain and low side lobes. Existing flat panel antennas usually use E-plane T-type power dividers to meet the wide bandwidth requirements. For example, the publication number "CN218849806U" discloses a flat horn array antenna. The antenna uses multiple sub-arrays to meet the high gain requirements, which makes the size and weight of the antenna larger and it will be difficult to meet the requirements of individual soldiers in the future. [Summary of the invention]

[0005] The present invention provides a narrow-side traveling waveguide slot array antenna to solve the problems of low gain, large size and heavy weight of existing flat panel antennas.

[0006] The present invention is realized by the following technical scheme, and provides a narrow-side traveling waveguide slot array antenna, comprising: an antenna cover, the antenna cover adopts a flanged edge design to protect the antenna surface; a slot radiation port, the slot radiation port is composed of an array of rectangular ports with horizontal short sides; a coupling feed port, the coupling feed port is composed of an array of rectangular ports with horizontal short sides; a power division network, the power division network is composed of a cascade of H-plane T-shaped power dividers, and adopts equal and unequal one-to-two power dividers.

[0007] Furthermore, the slot radiation port and the coupling feed port are fixedly connected to the power division network, and the antenna cover is bonded to the slot radiation port, the coupling feed port and the side of the power division network.

[0008] Furthermore, one coupling feeding port corresponds to four slot radiation ports.

[0009] Furthermore, the array of rectangular openings with horizontal short sides of the slot radiation openings is an unequally spaced array, and the coupling feed opening is composed of an array of rectangular openings with horizontal short sides and an unequally spaced array.

[0010] Furthermore, the slot radiation port 2 has 2×2 as the minimum radiation unit, and is composed of an array of 12×20 minimum radiation units with unequal spacing.

[0011] Furthermore, the coupling feed port corresponds to a one-to-two power divider of the power division network, and one one-to-two power divider connects two coupling feed ports.

[0012] Furthermore, the power division network is composed of equal-dividing and unequal-dividing one-to-two waveguide power dividers and non-standard waveguides, and the waveguide power dividers are all H-plane T-type splitters.

[0013] Furthermore, the slot radiation port, coupling feed port and power division network are made of non-metallic materials, and the surfaces are electroplated with conductive metal coatings and protective coatings.

[0014] Furthermore, the antenna cover is made of non-metallic material.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention adopts an H-plane T-type power divider with a narrow-edge traveling wave design. The H-plane T-type power divider is small in size, which realizes the characteristics of small size and light weight of the antenna. The amplitude and phase of the excitation signal are weighted by equally divided and unequally divided one-to-two power dividers and equally spaced and unequally spaced coupling feed ports. Impedance matching is performed by a plurality of one-to-two power dividers and non-standard waveguides to realize the electrical characteristics of high gain and low side lobe of the antenna, so as to achieve the effects of high gain, low side lobe, small size and light weight of the antenna.

[0017] (2) The antenna cover is made of non-metallic material, which can prevent sand and dust from entering the inner cavity of the narrow-edge traveling waveguide slot array antenna.

Brief Description of the Drawings

[0018] Figure 1 It is a front exploded schematic diagram of a narrow-side traveling waveguide slot array antenna of the present invention;

[0019] Figure 2 It is a schematic diagram of an exploded back side view of a narrow-side traveling waveguide slot array antenna of the present invention;

[0020] Figure 3 The figure is a schematic diagram of a narrow-side traveling waveguide slot array antenna of the present invention.

[0021] In the attached figure, 1. antenna cover; 2. slot radiation port; 3. coupling feed port; 4. power division network. [Specific implementation method]

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.

[0023] See also Figures 1 to 3 The present invention provides a narrow-side traveling waveguide slot array antenna including a radome 1, a slot radiation port 2, a coupling feed port 3 and a power division network 4.

[0024] The antenna cover 1 adopts a flange design to protect the antenna surface, the slot radiation port 2 is composed of a rectangular port array with horizontal short sides, the coupling feed port 3 is composed of a rectangular port array with horizontal short sides, and the power division network 4 is composed of a cascade of H-plane T-shaped power dividers, and adopts equal and unequal one-to-two power dividers. Among them, the power division network 4 synthesizes the energy of the slot unit, and at the same time, the power division network 4 has low transmission loss and high radiation efficiency of the waveguide slot array, so as to achieve high gain of the antenna, and the H-plane T-shaped power divider is small in size, so as to achieve the characteristics of small size and light weight of the antenna.

[0025] Specifically, the slot radiation port 2 , the coupling feed port 3 and the power division network 4 are fixedly connected, and the antenna cover 1 is bonded to the slot radiation port 2 , the coupling feed port 3 and the power division network 4 .

[0026] Specifically, the coupling feed port 3 is fixed to the power division network 4 by a plurality of screws. Before fixing, low-temperature solder paste is applied to the power division network 4. Applying low-temperature solder paste requires a steel mesh tool. The slot radiation port 2 is fixed to the power division network 4 by a plurality of screws. The screws penetrate the coupling feed port 3. Before fixing the slot radiation port 2, low-temperature solder paste is applied to the slot radiation port 2. Applying low-temperature solder paste requires a steel mesh tool.

[0027] The gap radiation port 2, the coupling feed port 3, and the power division network 4 complete the mating surface welding through reflow soldering; in the present embodiment, the reflow soldering adopts 12 temperature zone equipment, the maximum temperature does not exceed 160°C, and the transmission speed is 85cm / min; it can be understood that in other embodiments, depending on the material and the low-temperature solder paste, 160°C can be 180°C, 200°C, etc., and the transmission speed of 85cm / min can be 80cm / min, 100cm / min, etc.

[0028] Silicone rubber is applied to the top and side surfaces of the slot radiation port 2 and the side surfaces of the power division network 4 to bond the antenna cover 1. After bonding, the electrical performance of the antenna is tested. The electrical performance index of the antenna is improved by adjusting the gap between the antenna cover 1 and the slot radiation port 2. The process parameters are set to cure in a temperature box. Furthermore, the amount of silicone rubber applied to the top surface of the slot radiation port 2 is determined according to the gap between the antenna cover 1 and the top surface of the slot radiation port 2; the gap between the antenna cover 1 and the slot radiation port 2 is adjusted by rolling the antenna cover 1. The electrical performance is the antenna receiving standing wave. When the antenna standing wave is close to the design value, the antenna is placed in the tooling and cured in a temperature box. In other implementations, it can be cured naturally.

[0029] In this embodiment, the silicone rubber uses modified silane rubber, and the silicone rubber is applied using a 1.5mm nozzle at a speed of 9mm / s; it can be understood that in other embodiments, depending on the gap between the antenna cover 1 and the top surface of the slot radiation port 2 and the different silicone rubbers, 1.5mm can be 1mm, 2mm, etc., and the speed of 9mm / s can be 5mm / s, 10mm / s, etc.

[0030] Specifically, the slot radiation port 2 and the coupling feed port 3 are on the same structural member, and one coupling feed port 3 corresponds to four slot radiation ports 2. The slot radiation port 2 radiates by disturbing the surface current of the coupling feed port 3.

[0031] Specifically, the short side horizontal rectangular opening array of the slot radiation port 2 is an unequally spaced array, and the short side horizontal rectangular opening array of the coupling feed port 3 is composed of an unequally spaced array. The low sidelobe characteristic of the array is achieved by weighting the amplitude and phase of the slot excitation signal, and the excitation signal is a feed port coupling signal.

[0032] Specifically, the slot radiation port 2 has 2×2 as the minimum radiation unit, and is composed of an array of 12×20 minimum radiation units with unequal spacing. The unequal spacing array is used to reduce the influence of slot mutual coupling, thereby improving the antenna pattern. It should be pointed out that the narrow side of the slot radiation port 2 is horizontal to adapt to the direction of the coupling feed port 3. It can be understood that when the polarization mode of the antenna changes, the narrow side of the slot radiation port 2 also changes.

[0033] In this embodiment, the coupling feed port 3 is divided into two layers, the upper layer is integrated with the slot radiation port 2, and one coupling feed port 3 corresponds to a 2×2 minimum radiation unit, and the lower layer is a single entity. It should be pointed out that the coupling feed port 3 array is an unequally spaced array, and the array scale is 12×20.

[0034] Specifically, the coupling feed port 3 corresponds to a one-to-two power divider of the power division network 4 , and one one-to-two power divider connects two coupling feed ports 3 .

[0035] Specifically, the power division network 4 is composed of equal and unequal one-to-two waveguide power dividers and non-standard waveguides. The waveguide power dividers are all H-plane T-type splitters. The amplitude and phase of the excitation signal are weighted through equal and unequal matching; impedance matching is performed through a number of one-to-two power dividers and non-standard waveguides to achieve the electrical characteristics of high gain and low side lobes of the antenna.

[0036] Specifically, the slot radiation port 2, the coupling feed port 3 and the power division network 4 are made of non-metallic materials, and the conductive metal coating and the protective coating are electroplated on the surface to protect the conductive metal coating.

[0037] Specifically, the antenna cover 1 is a non-metallic material, which is a dielectric material. The electrical performance parameters of the antenna can be further optimized by matching the thickness of the antenna cover 1 with the gap between the antenna cover 1 and the slot radiation port 2, and at the same time, dust can be prevented from entering the inner cavity of the narrow-edge traveling waveguide slot array antenna. In this embodiment, the dielectric constant of the antenna cover 1 is 3.5, and the thickness of the antenna cover 1 is 0.4 mm. It can be understood that in other embodiments, according to actual needs, 0.4 mm can be replaced by 0.5 mm, 0.6 mm or other thicknesses, and the dielectric constant can be adaptively adjusted. Furthermore, the antenna cover 1 is bonded to the outermost side, which has the function of dust and moisture resistance. While improving the electrical performance of the antenna, it protects the antenna and ensures the quality of the antenna.

[0038] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A narrow-side traveling waveguide slot array antenna, characterized in that: include: A radome (1), wherein the radome (1) adopts a flanged edge design to protect the antenna surface; A slot radiation port (2), the slot radiation port (2) being composed of a rectangular port array with horizontal short sides; A coupling feed port (3), the coupling feed port (3) being composed of a rectangular port array with horizontal short sides; A power division network (4) is composed of a cascade of H-surface T-shaped power dividers, and is composed of equal-division and unequal-division one-to-two power dividers.

2. The narrow-side traveling waveguide slot array antenna according to claim 1, characterized in that: The slot radiation port (2) and the coupling feed port (3) are fixedly connected to the power division network (4), and the antenna cover (1) is bonded to the side of the slot radiation port (2), the coupling feed port (3) and the power division network (4).

3. The narrow-side traveling waveguide slot array antenna according to claim 2, characterized in that: One coupling feeding port (3) corresponds to four slot radiation ports (2).

4. The narrow side traveling waveguide slot array antenna according to claim 3, characterized in that: The array of rectangular openings with horizontal short sides of the slot radiation openings (2) is an unequally spaced array, and the coupling feed opening (3) is composed of an array of rectangular openings with horizontal short sides and an unequally spaced array.

5. The narrow-side traveling waveguide slot array antenna according to claim 4, characterized in that: The slot radiation port (2) has 2×2 as the minimum radiation unit and is composed of an array of 12×20 minimum radiation units with unequal spacing.

6. The narrow-side traveling waveguide slot array antenna according to claim 1, characterized in that: The coupling feed port (3) corresponds to a one-to-two power distributor of the power division network (4), and one one-to-two power distributor connects two coupling feed ports (3).

7. The narrow-side traveling waveguide slot array antenna according to claim 1, characterized in that: The power division network (4) is composed of equal-dividing and unequal-dividing one-to-two waveguide power dividers and non-standard waveguides, and the waveguide power dividers are all H-plane T-type splitters.

8. The narrow-side traveling waveguide slot array antenna according to claim 1, characterized in that: The slot radiation port (2), the coupling feed port (3) and the power division network (4) are made of non-metallic materials, and the surfaces are electroplated with conductive metal coatings and protective coatings.

9. The narrow-side traveling waveguide slot array antenna according to claim 1, characterized in that: The radome (1) is made of non-metallic material.

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