JPS60134606A - Antenna reflector and method of producing same - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna reflector used in communication devices and a method for manufacturing the same.

Conventional antenna reflectors have had a reflective surface formed by a combination of stretched thin aluminum panels. The panels were formed by stretching the A sheet on a contouring machine above the yield point of the material. but,
Upon removal from the molding machine, the panel is unstable and it is necessary to provide the panel with some type of reinforcement to increase stability.

One method has been to rivet or bond reinforcing ribs to the panels while supported on an assembly machine.

Other methods included a backing panel with honeycomb aluminum foil between the two panels.

Both methods require precise assembly and inspection of the reflective surface contour. Furthermore, the panels are not yet sufficiently stable to require assembly on the backing structure 2 and the profile of the reflective surface needs to be rechecked after assembly on the backing structure. Double checking of finished panels and after assembly is costly and time consuming. In addition, the contour of the reflective surface must be rechecked each time the reflector is separated for panel removal or replacement.

SUMMARY OF THE INVENTION The object of the present invention is to eliminate the above-mentioned drawbacks and to provide an antenna reflector that can be assembled easily and accurately, does not require inspection of the contour of the reflecting surface, and is sufficiently stable.

The antenna reflector according to the present invention has a reflecting surface formed by assembling rigid panels formed by casting, molding or pressing.

Because the present invention allows panels to be rigid and form to the desired contour with a high degree of accuracy, the reflector can be separated and reassembled when necessary without repeatedly rechecking the contour of the reflective surface.

Adjacent panels are integrally formed and positioned relative to each other by shape. As a result, panels can be assembled accurately.

The locator is configured in the form of a pair or more alignment holes formed in the joining sides of adjacent panels through which bolts or similar removable fasteners are passed through to join the panels together.

Alternatively, the positioning features may include male and female features, such as ribs and grooves, on the joining sides of adjacent panels.

In addition to the integral positioning, the panel has one or more reinforcing features integrally formed on the back surface.

As a result, the reflector can be moved through an arc of elevation as desired, since the assembled panel has its own stable reflective surface that is not significantly affected by changes in natural and active wind forces. Let's talk.

The reinforcing shape consists of a lip or protrusion provided on the back side of the panel, and is arranged so as to provide reinforcement in a predetermined direction. For example, in a dish-shaped reflector, reinforcement can be provided in the radial direction and the circumferential direction. It gets cloudy.

The panels are preferably all identical so that they can be interchanged with each other for ease of assembly and replacement, and are preferably formed from aluminum, although other lightweight metals or alloys may also be used.

Next, an embodiment of the antenna reflector of the present invention shown in the attached drawing 11rvc will be described in detail.

The accompanying drawing shows a dish-shaped antenna reflector 1 such as used in satellite communications equipment, which antenna reflector 1 consists of a parabolic reflecting surface 2 with a central opening 3. FIG. The reflector 1 is made up of a plurality of cast aluminum panels 4 which are removable from each other so that the reflector 1 can be separated and reassembled, for example to move or replace the panels.

Each panel 4 is identical for ease of assembly and replacement and has four sides 5, 6, 7.8 when viewed from the top, a first side 5 and a third side 7 respectively. Face to face,
The second side portion 6 and the fourth side portion 8 are opposed to each other.

The first and third side portions 5 and 7 are both curved, and correspond to the inner circumferential edge 9 and outer circumferential edge 10 of the reflective surface when assembled to the reflective plate. The second and fourth sides 6,8 are each both straight and are joined and secured to the corresponding sides 6,8 of the adjacent panel 4 in the assembled state of the reflector. Flange 1 from each side 5, 6, 7.8 of each panel 4
1, 12.

13 and 14 are suspended from each other, and the flanges 11
12, 13 and 14 together form a continuous edge, designated 15, of varying heights around the outer periphery of the panel.

The flange 11 is formed by two steps 16 , 17 , each flange 12 , 14 having two projecting legs 18 , 19 . When assembled to the reflector, the stepped portion 16
, 17 and legs 18, 19 are aligned in the same manner as the adjacent panel 4 to allow mounting and mounting of the reflector on a suitable support (not shown).

Furthermore, each flange 12, 14 is locally thickened on the inside at three regularly spaced locations 20, 21, 22, the locations 20, 21, 221/() being provided with holes, the holes n In assembly of the reflector, the holes 24 align with similar holes in the flanges 12, 14 of adjacent panels 4 to form passageways for securing the panels 4 together. The locally thickened portion n has a circular boss portion, and the circular boss δ is provided with a screw hole portion for accommodating a bolt (not shown) for fixing the assembled reflector plate to the support body. .

Each panel 4 has a back surface 4 reinforced with a plurality of lips.

The central lip wing extends between flanges 11 and 13 and provides radial reinforcement in the assembled reflector. This central lip also has legs 19 on flanges 12, 14.
It has a protruding leg device that matches the Two vertical ribs 31 arranged at regular intervals are extended between the central rib field and each flange 12, 14, and the vertical ribs 30, 3
1 is provided with circumferential reinforcement in the assembled reflector, and two diagonal lips 32 and 33 are provided in each space between the vertical lips (to) and 31 on both sides of the central lip. .

The front face U of each panel 4 forms a reflective surface 2 which is machined precisely to the required contour by means of a cutting tool controlled by a nobuter, for example.

As is clear from the foregoing description, the present invention provides antenna reflectors assembled from identical rigid panels having precise contours and removably coupled to each other.
Each individual panel can be easily replaced, and there is no need to recheck the contour of the reflective surface when separating and reassembling the reflector.

The present invention is not limited to the shape and structure of the reflector described above; for example, depending on the application, the reflector can be of any known shape, such as circular or oval, or it may be composed of a number of panels. You can also do that.

Integral formation for positioning the joint sides of adjacent panels may be done by providing a suitable structure □, for example, each panel may have a male shape on one side and a female shape on the opposite side; By engaging each other, the joining sides of adjacent panels are positioned in combination.

Instead of each panel having a male shape and a female shape on each of two opposite sides, one panel has a male shape on each of two opposite sides and another panel has a female shape on each of two opposite sides. The shape is such that panels having a male shape and panels having a female shape are interleaved.

Suitable female shapes and shapes include lips and grooves or protrusions and holes, etc. The positioning of the joining sides of adjacent panels, including all structures and connections, is within the scope of this invention.

Unitary reinforcement formations are similarly available in a wide variety of sizes and shapes, although the panels themselves can be formed from a suitable metal or alloy using casting, casting, or pressing techniques.

The edges around the outer periphery of each panel may be continuous as described above, or they may be interrupted. The reflective surface can be machined geometrically or non-geometrically as desired. Are the panels mutual? It is preferable to removably join the parts, but it is also possible to join them fixedly, for example by explosive welding.

Finally, the shape of each reflector can be of different dimensions depending on the particular application. For example, the diameter of the reflector described above can be varied by changing the dimensions of the panels or by adding (11) one or more rows of panels circumferentially extending around the outer periphery of the reflector. . To facilitate the combination of double-row reflectors, - next to the row! ! The positioning strips are positioned and protruded between the A panels, and serve to position adjacent panels in the next row.

[Brief explanation of the drawing]

1 is a perspective view of an antenna reflector according to the present invention; FIG. 2 is a front perspective view of one panel of the reflector shown in FIG. 1; FIG. 3 is a perspective view of one panel of the reflector shown in FIG. Figure 4 is a perspective view of the two panels combined, and Figure 5 is the 5- in Figure 4.
5 is a cross-sectional view taken along line 5. 1-Antenna reflector 2-Parabolic reflecting surface 3-Central opening 4-Panel 5, 6, 7.8-Side portion 9-Inner peripheral edge 10-Outer peripheral edge 11, 12, 13, 14-Fludge 15 - Continuous edge 18 , 19 , 29 - Legs
I.

Claims (1)

[Scope of Claims] 1) An antenna reflector plate comprising a reflective surface on the front side of an assembled panel, each panel being rigid and formed by casting, molding or pressing. 2) Antenna reflection characterized by forming a plurality of rigid panels by casting, molding, or press working, and dipping them into the joint sides to form a reflector plate (by fixing the flannel) (assemble the flannel) 3) An antenna reflector plate according to claim gt, characterized in that adjacent panels are removably coupled along the joint side portions. 4) The antenna reflector according to claim 3, wherein the joint side portions of adjacent panels are integrally formed and positioned relative to each other depending on their shapes. 5) The positioning member has a shape consisting of at least a pair of alignment holes formed in flanges provided on the joining sides of adjacent panels, and the tightening member is extended through the alignment holes so that the panels can be attached and detached from each other. The antenna reflector according to claim 4, characterized in that the antenna reflector plate is bonded. 6) The antenna reflector according to claim 1, wherein each panel has a back surface facing the reflective surface, and one or more reinforcing shapes are integrally formed on the back surface. Board. 7) The antenna reflector according to claim 6, wherein the reflecting surface is dish-shaped and is arranged in a reinforced shape so as to be reinforced in the circumferential direction and the radial direction. 8) The antenna reflector according to claim 6 or 7, characterized in that it is constructed from upright lips each having a reinforcing shape. 9) The antenna reflector plate according to claim M1, wherein the reflecting surface is machined into a desired contour. 10) The antenna reflector according to claim 1, wherein all the panels are the same. 11) The antenna reflector plate according to claim 1, wherein each panel is made of a lightweight metal or alloy. 12) The method according to claim 2, wherein the reflector is detachably attached to the support. 13) The second aspect of the present invention is characterized in that the removable fastening is performed by inserting a member into the alignment hole formed in the flange of the joining side to removably fix the joining side of the adjacent panel. The method described in section.