JPH0711020U - Slot array antenna for radar - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a slot array antenna for radar, which is simple in construction, lightweight, and effective for cost reduction. In a radar slot array antenna including an antenna horn, a slot waveguide, a cross polarization suppression grating, and an outer casing, an outer casing 20 and an antenna horn are provided, and a slot waveguide 23 and a cross polarization suppressing lattice 24 are provided. It is composed of an outer casing and an antenna horn integrally molded product in which a space for housing is formed in advance.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radar slot array antenna, and more particularly to a radar slot array antenna that has a simple structure, is lightweight, and is effective for cost reduction.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, in this type of device, those shown in FIGS. 2 and 3 are known. The radar slot array antenna shown in FIG. 2 has an outer casing 1 made of an aluminum sheet metal, reflection flares 2 and 3 forming an antenna horn for forming a vertical beam, and a horizontal beam width of a transmitted / received beam. To connect the slot waveguide 4, the cross polarization suppression grating 5, the dielectric 6, the adhesive 7 that joins the outer casing 1 and the dielectric 6, and the antenna horn and the outer casing 1 to each other. And a holding metal fitting 9 for holding the opening of the antenna horn.

The radar slot array antenna shown in FIG. 3 includes an outer casing 10 which is a plastic molded product having a characteristic of a dielectric material, antenna horns 11 and 12 made of an aluminum sheet metal, a slot waveguide 4, and a cross polarization antenna. It is composed of a wave suppression grid 5, a foam material 13 for filling and adhering and fixing the space between the antenna horns 11, 12 and the outer casing 10, and a holding metal fitting 9 for holding the opening of the antenna horn. ing.

[0004]

[Problems to be solved by the device]

 The slot array antenna for radar shown in FIG. 2 is made of aluminum sheet metal except for the dielectric 6, the slot waveguide 4 and the adhesive 7. Therefore, when manufacturing these, the steps of cutting, drilling, bending, and surface treatment of the aluminum sheet metal are required, and the man-hour, material cost, and labor cost are extremely high. Not only that, but it also had to go through a complicated assembly process such as rivet bonding and bonding to assemble each part. Further, the slot array antenna for radar shown in FIG. 3 has a disadvantage that the amount of aluminum sheet metal and the number of man-hours required for various steps are smaller than those of FIG. 2, but the aluminum sheet metal of the antenna horn portion still remains.

An object of the present invention is to provide a slot array antenna for a radar that solves the above problems of the prior art.

[0006]

[Means for Solving the Problems]

 In order to solve the problems of the prior art, the present invention proposes an outer casing and an antenna horn, in which a space for accommodating a slot waveguide and a cross polarization suppression grating is formed in advance. Consists of a molded product with an antenna horn.

[0007]

[Action]

 Since the outer casing and the antenna horn are composed of the outer casing and the antenna horn integrated molding in which the space for accommodating the slot waveguide and the cross polarization suppression grating is formed in advance, the man-hours required for each process of the aluminum sheet metal are Material cost will be reduced as the amount of aluminum sheet metal is reduced, complicated assembly process such as rivet bonding and bonding will be reduced, and weight will be reduced and weight will be reduced as the aluminum sheet metal structure is reduced.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG.

Reference numeral 20 is a plastic outer casing / antenna horn integrally molded product which is molded by a profile extrusion molding method and is excellent in weather resistance and vibration resistance. The outer casing / antenna horn integrated molded product 20 is a combination of two molded products having substantially symmetrical shapes as shown in the figure. When the two molded products are bonded, the slot waveguide 23 and the cross waveguide The shape is designed in advance so that a space into which the polarization suppression grating 24 should be inserted is formed. Reference numeral 25 is a dielectric similarly molded by the profile extrusion molding method.

Next, the manufacturing / assembling procedure of the slot array antenna for radar of the present invention will be described. An aluminum thin film is vapor-deposited by vacuum vapor deposition to a thickness of about 10 μm or a metal foil (aluminum foil) is applied to the reflection flares 21 and 22 of the outer casing / antenna horn integrally molded product by the profile extrusion method in order to make the radio wave reflection effective. A) using, for example, double-sided adhesive tape. After that, the slot waveguide 23 and the cross polarization suppression grating 24 are sandwiched and bonded and fixed. Next, the dielectric 25 molded by the profile extrusion molding method is inserted into the front opening of the outer casing / antenna horn integrated molded product 20, and is fixed / attached.

[0011]

[Effect of device]

 As described above, according to the present invention, the outer casing and the antenna horn are formed by integrally molding the outer casing and the antenna horn in which the space for accommodating the slot waveguide and the cross polarization suppression grating is formed in advance. However, since the flare portion was deposited with aluminum to give it a radio wave reflecting effect, the antenna horn made of aluminum sheet metal is no longer necessary, which reduces the number of man-hours required for each step of aluminum sheet metal and reduces the amount of aluminum sheet metal. The material cost is reduced, the complicated assembly process such as rivet bonding / adhesion is reduced, and the weight is reduced as the aluminum sheet metal structure is reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a slot array antenna for radar as an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a conventional slot array antenna for radar.

FIG. 3 is a sectional view showing the configuration of another conventional radar slot array antenna.

[Explanation of symbols]

 20 External Casing / Antenna Horn Integrated Molded Product 21, 22 Reflection Flare 23 Slot Waveguide 24 Cross Polarization Suppression Grating 25 Dielectric

Claims (5)

[Scope of utility model registration request] 1. A radar slot array antenna including an antenna horn, a slot waveguide, a cross polarization suppression grating, and an outer casing, wherein the outer casing and the antenna horn are the slot waveguide and the cross polarization. A slot array antenna for a radar, which comprises an outer casing and an antenna horn integrally molded product in which a space for accommodating the suppression grid is formed in advance. 2. The slot array antenna for radar according to claim 1, wherein the outer casing / antenna horn integrated molded product is made of plastic by a profile extrusion molding method. 3. The slot array antenna for radar according to claim 1, wherein an aluminum thin film is vapor-deposited on a reflection flare portion of the antenna horn of the outer casing / antenna horn integrally molded product by using a vacuum vapor deposition method. . 4. The slot array antenna for radar according to claim 1, wherein a metal foil is attached to a reflection flare portion of the antenna horn of the outer casing / antenna horn integrally molded product. 5. The slot array antenna for radar according to claim 1, wherein the outer casing / antenna horn integrated molded product is a combination of two molded products having substantially symmetrical shapes.