JPS58156201A - Production of slot array antenna - Google Patents

Abstract

PURPOSE:To aviod the deformation of the waveguide part which is caused when a slot is processed, by preparing a pair of half-cut waveguides having slots and then butting them together. CONSTITUTION:A pair of half-cut waveguide parts 10a and 10b are set previously with symmetrical faces which are parallel to a current distribution formed along the lengthwise direction. The slots 14 are previously formed to the part 10a, and then both parts 10a and 10b are butted and fixed to each other. In such a way, it is possible to avoid the deformation of the part 10a which is caused when the slot 14 is processed. At the same time, the thickness of the part 10a can be reduced as less as possible. As a result, the characteristics of a slot array antenna can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a slot array antenna.

The sacred prior art is shown in FIG. This slot array antenna has a so-called edge shunt slot (edge 5hunt 5lot) 5 formed at an angle θ on the rectangular 4 [1i1t7) 1 side 2 spanning both side edges of the rectangle 4 [1i1t7], and the H side 3 on the H side 3. A longitudinal shunt slot is located at a distance of - from the center of surface 3 @4.
5hunt alot) 6f formed.

A cross section along the slot 5 of the waveguide 1 is shown in Figure #i@2. It is known that the thickness b1 of the waveguide l is preferably as thin as possible. Therefore, in other prior art, the waveguide f
A part 7 of 1 is cut, and a slot 5 is formed in this part 7. In this way, the characteristics of the slot array antenna are improved. In particular, in the prior art as shown in FIG. 3, in order to prevent the 41-wave tube 1 from being deformed when forming the slot 5, NAK sand or an alloy having a low melting point is pre-filled inside the 4-wave tube 1. Keep that slot 5
After the formation of the four-wave tube 1, sand, alloy, etc. sealed in the four-wave tube 1 are removed. It is clear that in such prior art, the manufacturing process is complicated and the productivity is poor. .

An object of the present invention is to provide a method for manufacturing a slot array antenna that can improve productivity.

According to the present invention, a pair of waveguide sections are halved in a symmetrical direction parallel to the current distribution along the longitudinal direction, and slots are formed in advance on at least two sides of these equal waveguide sections, Since the waveguide parts prepared in this way are fixed with the symmetry planes abutting against each other, sand, alloy, etc. can be sealed or stored inside the isowave tube as in the prior art described above. The steps of removing and removing are omitted in the present invention, thereby improving productivity.

FIG. 4 is a simplified perspective view showing the distribution of wall current in a waveguide 1G according to an embodiment of the present invention.

This current distribution, known to those skilled in the art as mode 9, is plane symmetric with respect to a plane of symmetry 13 along the length of the waveguide lO.

Figure 5 shows 4! FIG. 4 is a perspective view of a slot array antenna having the current distribution shown in FIG. The four-wave tube IO is divided into waveguide portions 10a plane symmetrically with respect to the symmetry direction 13.
, 10b are butted together at their planes of symmetry 13. At least one of the pair of waveguide portions 10a and 1Ob has an edge in its Ellll.
A shunt slot) 14 is formed. The E-plane 11bK of the other waveguide section 10b may not be slotted. The 4-wave tS portion 10a, the Hon#i of 1Ob, and the reference numbers 12a and 12b are respectively shown.

The one part of the waveguide parts 10a, 10b is soldered to the seven flange 15, and the other parts (not shown) are constructed in the same manner. In this way, the four wave parts 10a, 1
0b is butted with the symmetry 1i [i13 and fixed in the nine-shaped configuration.

According to such an embodiment, the slot 14 is provided in at least one of the four wave parts 10a and lOb which have been prematurely ejaculated in advance.
is formed in advance, and then the 4a pipe portion 10m, 1
0b are fixed by the foreshadowing lines that butt together, so that deformation of the waveguide portion 10- during the cutting process of the slot 14 is prevented, and the wall thickness of the waveguide portion 10a is made as small as possible. By doing so, the characteristics of the slot array antenna can be improved.

FIG. 6 is a perspective view of a part of another embodiment of the present invention;
Figure 7 shows the axis-perpendicular vFr direction. This example is based on the fifth
Similar to the illustrated embodiment, corresponding parts are provided with the same reference numerals. What should be noted is the 4JIl pipe sections 10a and 10b.
In the vicinity of the symmetry plane 13 where the two abut against each other, nine supporting pieces 16m and 16b bent outward are formed alternately at intervals in the longitudinal direction. With this, 4 waves part 1
0 a + 10b is prevented from shifting laterally (in the left-right direction in FIG. 47), and the twisting of the four waves 1110 is suppressed. The ends of the four-wave portions 10a, 10b are secured together by seven lunges, similar to the embodiment described in connection with Figure 5 above.

As described above, according to the present invention, a separate waveguide section is prepared which is divided by a plane of symmetry along the longitudinal direction parallel to the current component (■), and a slot is formed on at least one side of the waveguide section. In this way, the pair of waveguide sections with slots formed on at least one side are fixed in a state that is aligned with the plane of symmetry, so that deformation of the waveguide when the slots are formed is prevented. It is possible to prevent this to a large extent, thereby increasing productivity, and since the wall thickness can be reduced, characteristics can be improved.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the prior art, Fig. 'S2 is a 19T view along the slot 5 of the prior art shown in Fig. 1, and Fig. 3 is a lr opening view corresponding to Fig. 2 of another prior art. , FIG. 4 is a darkened perspective view showing the current distribution of an embodiment of the present invention, %5
The figure is a perspective view of one embodiment of the present invention, the vJG diagram is a perspective view of a part of another example of the present invention, and FIG. 7 is a part of the embodiment shown in FIG. It's evil. lO... 4 waves, loa, lOb... waveguide f part,
13...Symmetry plane agent Masu Rishi Shikyo Kei Part 1m 2nd WJ 2 Fig. 3 Fig. 4 Fig. 51f Fig. 6 Fig. 7 Fig. 3-

Claims (1)

[Claims] A method for manufacturing a pre-lot array antenna, characterized in that the antenna is divided in a symmetrical direction along a longitudinal direction parallel to the current distortion, and is fixed arbitrarily in a slot shape on at least one side.