JP2900660B2 - Horn antenna manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a horn antenna.

[0002]

2. Description of the Related Art FIG.
As shown in (a), (b), and (c), a first step of manufacturing the casting 1 (FIG. 2A) and a second step of cutting the inner surface and the flange surface (shown in FIG. 2A). Third), the packing 23 is inserted into the groove 11, and the dielectric sheet 21 is assembled with the ring 23 and the bolt nut 24 to assemble.
(FIG. 2C). In addition, FIG.
(B), (c) is the figure which represented the upper half of the horn antenna by the torn surface. Such a conventional manufacturing method can be reduced in man-hours compared to a method of cutting from a metal lump such as a round bar, and is therefore widely used particularly in the production of mass-produced products. The above-mentioned dielectric cover is usually attached to the opening at the tip of the horn antenna to keep the inside airtight. As the horn cover, a case in which a thin dielectric sheet is used, or a case in which a hard dielectric material having a predetermined thickness of about の wavelength of the used frequency is used is considered. FIG. 2 shows a case where a thin dielectric sheet is used. The dielectric sheet is adhered to a metal ring 22 and attached to the flange of the horn antenna opening with bolts 24. Groove 1 on flange of horn antenna to prevent water from entering inside
The packing 23 is inserted by cutting one.

[0003]

In this conventional method of manufacturing a horn antenna, it is necessary to form a flange, a packing groove, etc. on an opening surface in order to mount a horn cover. Further, there is a disadvantage that the horn cover and the ring must be manufactured separately from the horn antenna. Therefore, in order to provide a cheaper product, there has been a demand for a manufacturing method that reduces the number of man-hours and the parts, particularly the horn cover and ring.

[0004]

A method of manufacturing a horn antenna according to the present invention is directed to a method of manufacturing a horn antenna manufactured by cutting a casting, wherein the tip of the casting corresponding to the opening of the horn antenna is heated. The molten or softened dielectric material is poured, and after the dielectric is solidified, the casting and the dielectric portion are simultaneously cut and manufactured.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. 1 (a), 1 (b) and 1 (c) show a state diagram of a semi-finished product in a manufacturing process according to an embodiment of the present invention. The manufacturing process of this embodiment is the first process of manufacturing the casting 1 (FIG. 1).
(A)) and a second step of pouring the dielectric material 2 (FIG. 1)
(B)) and a third step of performing cutting after solidification of the dielectric (FIG. 1 (c)). FIG. 1A is a cutaway view of the upper half of the casting 1, in which a concave portion 10 is provided on the inner surface of the distal end of the flange in order to increase the adhesion of the dielectric to the casting. FIG.
(B) shows a state where the dielectric 2 is poured into the casting 1 by heating and melting. After the dielectric 2 is solidified, a portion shown by a mesh line in FIG. 1C is cut. That is, the processing of finishing the dielectric of the horn cover to a predetermined thickness and the inner surface processing of the horn antenna are simultaneously performed. Therefore, the production and assembly of parts such as airtight packing, dielectric sheets, rings, etc. described in the conventional example can be completely eliminated.

[0006]

As described above, according to the present invention, the inner surface of the horn antenna and the thickness of the dielectric are simultaneously cut and finished after the dielectric is melted and poured into the casting, and the dielectric is solidified. This has the effect of reducing man-hours for separately manufacturing a plurality of parts including a horn cover for processing and airtightness, and also reducing the number of man-hours for assembling the horn cover. The same effect can be obtained even when special processing is required on the inner surface such as a corrugated horn.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state of a product in each manufacturing process according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state of a product in each manufacturing process of a conventional horn antenna.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casting 2 Dielectric 10 Depressed part 11 Packing groove 21 Dielectric sheet 22 Ring 23 Packing 24 Bolt and nut

Claims (2)

(57) [Claims] 1. A method for manufacturing a horn antenna manufactured by cutting a casting, wherein a dielectric material heated and melted or softened is poured into a tip of the casting corresponding to an opening of the horn antenna. A method for manufacturing a horn antenna, comprising cutting and manufacturing a casting and a dielectric portion at the same time after solidification. 2. The method for manufacturing a horn antenna according to claim 1, wherein a concave portion for improving the adhesion of a softened dielectric material is provided inside the end of the flange of the casting.