JPH0625048Y2 - Planar antenna - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a planar antenna for receiving satellite broadcasting.

[Prior Art] Conventionally, there is a planar antenna of this type for receiving satellite broadcasting as shown in FIG. 4, and the planar antenna body 1 includes a feeding circuit board 11 and a radiation circuit on which a feeding circuit pattern is formed. It is formed by a multi-layer system in which the radiated circuit board 12 having a pattern is laminated on the ground conductor plate 10 at an appropriate interval, and the peripheral edge of the ground conductor plate 10 is raised to be used as a case main body. A radome 2 attached to the front surface forms a case for housing the planar antenna body 1. In addition, radome 2
A foamed resin 2'for reinforcement and heat insulation is attached to the back surface of the. The waterproof mechanism of the end face of the case (joint portion of the case body made of the ground conductor plate 10 and the radome 2) superposes the rising portion 10a of the peripheral edge of the ground conductor plate 10 and the falling portion 2a of the peripheral edge of the radome 2. This is realized by attaching a waterproof packing 3 made of a foam waterproof material around the joint portion and pressing it with a decorative frame 4.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional example, the work of attaching the waterproof packing 3 around the end face of the case is difficult and the assembly is troublesome, and the waterproof packing 3 is not attached. There is a problem that waterproofness may be impaired because it cannot be reliably performed. That is, since it is necessary to attach the waterproof packing 3 to the end face having a narrow width, the assembling work becomes troublesome, and the rising portion 10a of the ground conductor plate 10 and the radome 2 are also complicated.
Since the waterproof packing 3 is attached to the uneven surface where the falling portions 2a of the above are overlapped, there is a problem that the waterproof packing 3 is not adhered to the waterproof packing 3 and the waterproofness is impaired. .

The present invention has been made in view of the above points, and an object of the present invention is to provide a planar antenna which can be easily assembled and which is surely waterproof.

[Means for Solving the Problems] In the planar antenna of the present invention, a U-shaped recess is formed over the entire circumference of the ground conductor plate of the planar antenna body, and the outer end portion extends outward to form a flange portion. And a flange portion facing the above flange portion is provided over the entire circumference of the radome covered on the front surface of the planar antenna main body, a waterproof packing is interposed between both flange portions, and both flange portions are wrapped. By fitting such a decorative frame having a U-shaped cross section, the waterproof packing is pressed and sandwiched between both flange portions.

[Operation] The present invention is configured as described above, and is formed by forming a U-shaped concave line over the entire circumference of the ground conductor plate of the planar antenna body and extending the outer end portion to the outside. Ornament with a U-shaped cross section that wraps both flange parts with a waterproof packing interposed between the flange part and the flange part that covers the entire circumference of the radome that is attached to the front surface of the planar antenna body. By fitting the frame, the waterproof packing is pressed and sandwiched between both flanges, so it is easier to assemble than the conventional case where the waterproof packing is attached to the end face of the case, and the flat flange Since waterproof packing is interposed between the parts, reliable waterproofness can be obtained.

Furthermore, since the U-shaped recess is formed over the entire circumference of the ground conductor plate of the planar antenna body, even if the ground conductor plate is thinned to reduce the weight of the planar antenna, it is sufficient. The mechanical strength can be secured. In addition, a waterproof packing is inserted between the flange part of the radome and the flange part that extends the outer end of this groove, and a decorative frame with a U-shaped cross section that fits both flange parts is fitted. and when,
It is possible to prevent the waterproof packing from being displaced by the outer wall of the U-shaped concave line, and to realize a reliable waterproof effect.

[Embodiment] FIGS. 1 to 3 show an embodiment of the present invention in which a U-shaped recess 9 is formed over the entire circumference of a ground conductor plate 10 of a planar antenna body 1 and an outer end thereof is formed. The flange portion 5 is formed by extending the portion to the outside, and the flange portion 6 facing the flange portion 5 is provided over the entire circumference of the radome 2 which is covered on the front surface of the planar antenna body 1. By interposing a waterproof packing 7 made of a foamed waterproof material between the two flanges 5 and 6 and fitting a decorative frame 8 having a U-shaped cross section so as to wrap the both flanges 5 and 6, The waterproof packing 7 is sandwiched under pressure.

2 and 3 show the overall configuration, in which the circuit portion Y and the mounting portion Z are provided on the back side of the planar antenna X. The planar antenna X is a geostationary satellite as shown in FIG. It is arranged with an appropriate elevation angle so that the user can see.

In the present embodiment, since the U-shaped recess 9 is formed over the entire circumference of the ground conductor plate 10 of the planar antenna body 1, the ground conductor plate 10 is made thin to reduce the weight of the planar antenna. It is possible to reinforce the mechanical strength in the case of aiming for improvement. In addition, a waterproof packing 7 is interposed between a flange portion 5 formed by extending the outer end portion of the groove 9 and a flange portion 6 provided over the entire circumference of the radome 2, and both flange portions are provided. By fitting the decorative frame 8 having a U-shaped cross section so as to wrap around the 5 and 6, the waterproof packing 7 is clamped by the flange portions 5 and 6, so that the waterproof packing is attached to the end face of the case as in the conventional example. Assembling is easier than the case where 4 is attached. Further, since the waterproof packing 7 is interposed between the flange portions 5 and 6 formed of flat surfaces, the adhesion of the waterproof packing 7 is improved and reliable waterproofness is obtained.

Further, since the U-shaped recess 9 is formed over the entire circumference of the ground conductor plate 10, even if the ground conductor plate 10 is made thin to reduce the weight of the planar antenna, sufficient mechanical strength is achieved. The strength can be secured. Furthermore, a waterproof packing 7 is interposed between the flange portion 5 extending the outer end portion of the recess 9 and the flange portion 6 of the radome, and a U-shaped cross section such that both flange portions 5 and 6 are wrapped. When the rectangular decorative frame 8 is fitted, the waterproof packing 7 can be prevented from being displaced by the outer wall of the U-shaped recess 9.

[Advantages of the Invention] The present invention is configured as described above, and is attached to the front surface of the planar antenna body and the flange portion formed by extending the ground conductor plate of the planar antenna body over the entire circumference. A waterproof packing is placed between the flange provided over the entire circumference of the radome, and a decorative frame having a U-shaped cross section that fits around both flanges is fitted to the waterproof packing at both flanges. Since it is pressed and sandwiched, it is easier to assemble compared to the case where the waterproof packing is pasted on the case end face as in the conventional example, and the waterproof packing is interposed between the flat flange parts, so it is reliable. There is an effect that excellent waterproofness can be obtained.

Furthermore, since the U-shaped recess is formed over the entire circumference of the ground conductor plate of the planar antenna body, even if the ground conductor plate is thinned to reduce the weight of the planar antenna, it is sufficient. There is an effect that mechanical strength can be secured.

In addition, a waterproof packing is inserted between the flange part of the radome and the flange part that extends the outer end of this groove, and a decorative frame with a U-shaped cross section that fits both flange parts is fitted. At this time, the waterproof packing can be prevented from being displaced by the outer wall of the U-shaped concave line, and a reliable waterproof effect can be realized.

[Brief description of drawings]

1 is a sectional view of an essential part of an embodiment of the present invention, FIG. 2 is a rear view of the same, FIG. 3 is a side view of the same, and FIG. 4 is a sectional view of an essential part of a conventional example. Reference numeral 1 is a planar antenna body, 2 is a radome, 5 and 6 are flange portions, 7 is a waterproof packing, 8 is a decorative frame, and 10 is a ground conductor plate.

Claims (1)

[Scope of utility model registration request] 1. A U-shaped recess is formed over the entire circumference of a ground conductor plate of a planar antenna body, and an outer end portion is extended outward to form a flange portion, which is covered on the front surface of the planar antenna body. A flange portion is provided so as to face the above flange portion over the entire circumference of the mounted radome, a waterproof packing is interposed between both flange portions, and a decorative frame having a U-shaped cross section that wraps both flange portions is fitted. The flat antenna is characterized in that the waterproof packing is pressed and sandwiched between both flanges by fitting.