MXPA00002287A - Converter provided with built-in patch antennas for receiving direct broadcasting by satellite - Google Patents

Abstract

The object of the present invention is to provide a converter (1) for receiving satellite broadcasting wherein a radio wave from a satellite can be received without using a die-cast frame and the cost can be reduced. A printed circuit board (19) and an antenna member provided to the printed circuit board for receiving a radio wave from a satellite via a parabolic reflector are provided;the antenna member is composed of patch antennae (21) made of conductive foil and is formed on one surface of the printed circuit board (19).

Description

CONVERTER PROVIDED WITH INTEGRATED PATCH ANTENNAS TO RECEIVE DIRECT TRANSMISSION VIA SATELLITE BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a converter for receiving satellite transmission, particularly it refers to the structure of a converter in which an antenna is constructed to receive a radio wave from a satellite by means of a parabolic reflector.

DESCRIPTION OF THE RELATED TECHNIQUE Figure 3 is a schematic perspective view showing a converter of conventional type for receiving satellite transmission and the converter for receiving satellite transmission 51 is composed of an upper box 52 and a lower box 53 which are combined and mutually integrated and form a housing and the body of the converter housed inside these upper and lower boxes 52 and 53, and parts having a smaller diameter 52a and 53a and parts having a larger diameter 52b and 53b which respectively form a cylinder when the upper and lower boxes are combined and integrated, respectively formed in the upper and lower boxes 52 and 53. Meanwhile, the converter body is provided with a cast frame in die 54, the cast frame in die 54 is composed of a housing 54a whose inner part is hollow, a smaller cylinder 54b articulated with one side of the housing 54a and one part c larger illicit 54c integrated with one end of the smaller cylinder 54b and the other side of the housing 54a is open. Each inner part of the housing 54a, the smaller cylinder 54b and the larger cylindrical part 54c communicate, the ring rubber packing 55 is inserted into one end of the larger cylindrical part 54c and a waterproof cover is fitted in the form of a cup. Also, the converter body is provided with a printed circuit board 58 supporting a probe 57 as an antenna element, a die cast cover 59 for housing a circuit (not shown) that is formed on the printed circuit board 58 and a metal cover 60 attached to die casting 59, printed circuit board 58, die casting 59 and metal cover 60 are overlapped and fixed to cast frame on die 54 by joining screws 61 in a state wherein the probe 57 is located on the inside of the housing 54a. The body of the converter is housed within the upper and lower boxes 52 and 53 with the waterproof cap 56 projecting outward from the pieces having a larger diameter 52b and 53b. The converter for receiving composite satellite transmission 51 as described above, is attached to a concave parabolic reflector that is not shown, a radio wave is transmitted from a satellite in the waterproof cap 56 by means of the parabolic reflector, is transmitted to the larger cylindrical part 54c and the smaller cylinder 54b, is received by means of the probe 57 and a received signal that was acquired as described above is input to the non-shown receiver, of the television set, of the video recorder and other devices, by amplifying the received signal and converting the frequency of the received signal amplified respectively by the previous circuit that is not shown. However, the aforementioned conventional converter for receiving satellite transmission 51 has defects: die casting frame 54 is coarse since it is formed by pouring material into a die, the cost of the materials is increased, work is required Cutting to improve dimensional accuracy, die casting requires more facilities and labor and therefore the cost increases. The aforementioned conventional converter also has a defect: the cost is increased since work is required to join the probe 57 to the printed circuit board 58.

BRIEF DESCRIPTION OF THE INVENTION The present invention is made in view of the above situation and the object is to provide a converter to receive satellite transmission where a radio wave of a satellite can be received without using a die casting frame and in this way the cost can be reduced . To achieve the above object, a converter for receiving satellite transmission in accordance with the present invention is characterized primarily by providing a printed circuit board and an antenna element provided to the printed circuit board to receive a radio wave from a satellite by means of a parabolic reflector, the above antenna element is composed of a large number of patch antennas made of conductive thin sheet and is formed on one side of the printed circuit board. Also, in the above configuration, the metal frame is provided for attaching the printed circuit board and a metal cover attached to the metal frame, the printed circuit board is attached to one side of the end of the metal frame with the antenna element exposed on the metal frame. the outer part, the metal cover is attached to the other side of the end of the metal frame, and the printed circuit board, the metal frame and the metal cover are integrated. In addition, in the above configuration, first and second boxes made of mutually combined synthetic resin are respectively provided, integrated and forming a housing, a thin piece is formed in the second box, the printed circuit board, the metal frame and the metal cover they are housed in the first and second boxes, the antenna element and the thin piece are opposite, and the inner part of the first and second boxes is sealed.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic perspective view showing a converter for receiving satellite transmission in accordance with the present invention; Figure 2 is a sectional view showing the converter for receiving satellite transmission in accordance with the present invention; and Figure 3 is a schematic perspective view showing a converter of conventional type for receiving satellite transmission.

DETAILED DESCRIPTION OF THE PREFERRED MODALITY With reference to Figures 1 and 2, a mode of a converter to receive satellite transmission in accordance with the present invention will be described below. The converter for receiving satellite transmission 1 is composed of first and second boxes 2 and 12 mutually combined and integrated and forming a housing, a rubber gasket 10 as a sealing material between the first and second boxes 2 and 12 and the body of the converter housed in the inner part of the first and second boxes 2 and 12. The first box 2 is acquired by forming synthetic resin material in the form of a square box, it is provided with an upper wall 3, a lower wall 4 and side walls 5 , 6 and 7 and a groove 8 is formed in the end face of the upper and lower walls 3 and 4 and the side walls 5, 6 and 7. A semicircular cut 4a is formed in the bottom wall 4 and a concave portion of Fit 9 is formed in each inner wall of the upper and lower walls 3 and 4 and the side walls 5 and 7 with the exception of the cut 4a. The rubber gasket 10 is acquired by forming the rubber material in a rectangle, a part of a lower side 11 is cut and a cut 11a is formed. The rubber gasket 10 fits in the groove 8 of the first box 2 in a state in which the cut 11a corresponds to the cut 4a of the first box 2. The second box 12 is acquired by forming synthetic resin material in a rectangle , has its upper and lower walls 13 and 14 and its side walls 15, 16 and 17 and a circular thin piece 16a that expands outwardly is formed in the side wall 16. A semicircular cut 14a is formed in the bottom wall 14 and a hook 18 is provided to the upper walls, lower and lateral 13, 14, 15 and 17 with the exception of the previous cut 14a. The second box 12 is combined and integrated with the first box 2 by adjusting the hook 18 to the concave adjustment portion 9, the cut 14a corresponds to the cut 4a of the first box 2 and each end face of the upper, lower and lower walls. laterals 13, 14, 15 and 17 are pressed into the rubber gasket 11. The aforementioned body of the converter is composed by integrating a printed circuit board 19 made of a synthetic resin, a metal frame 24 for joining the printed circuit board 19 and a metal cover 34 attached to the metal frame 24. The thin copper sheet 20 having a rectangular cut 20a is formed on one surface of the printed circuit board 19 and four patch antennas 21 made of thin sheet of copper as a antenna element are provided in the cut 20a by printing and engraving among others. A circuit 22 provided with an electrical element such as a resistor and a capacitor is formed on the other surface of the printed circuit board 19, and the circuit 22 and each patch antenna 21 are connected by means of a through hole which is not sample. The adjustment cuts 23 are formed at the right and left edges of the printed circuit board 19. The metal frame 24 is formed by means of a metal sheet having conductivity such as a flat iron plate in a rectangular frame, has a upper plate 25, a lower plate 26 and side plates 27 and 28 and an adjustment projection 29 is formed on one side of the end of the side plates 27 and 28. The metal frame 24 is divided into a plurality of parts by means of a coupling plate 30 for coupling the upper plate 25 and the side plates 27 and 28 and a coupling plate 31 for coupling the lower plate 26 and the side plates 27 and 28. Also, a coaxial line 32 is supported by the lower plate 26 and the ring rubber packing 33 while a sealing element fits around the coaxial line 32. The printed circuit board 19 is attached to one end face of the metal frame 24 in a In which the adjustment projection 29 is adjusted in the adjustment cut 23, the coaxial line 32 is connected to the circuit 22 and the patch antennas 21 are exposed outwardly of the metal frame 24. The metal cover 34 is formed by means of of a metal sheet having conductivity such as a flat iron plate in a rectangular box having an upper plate 35, a lower plate 36 and side plates 37, 38 and 39. The metal cover 34 is attached to the other side of the end of the metal frame 24 by suitable means such as welding and caulking and each end face of the upper and lower plates 25 and 26 and the side plates 27 and 28 of the metal frame 24 is located on the inside of the metal cover. Next, to explain a method for assembling the converter to receive satellite transmission 1 which is composed as described above, first, the adjustment cut 23 is adjusted to the adjustment projection 29, the printed circuit board 19 in the that the thin copper foil 20, the patch antennas 21 and the circuit 22 are formed, is attached to one end face of the metal frame 24 and the coaxial line 32 supported by the lower plate 26 of the metal frame 24 and the circuit 22 They are connected by welding. Next, the rubber gasket 33 fits around the coaxial line 32, then, each end face of the upper, lower and side plates 25, 26, 27 and 28 of the metal frame 24 is located inside the metal cover 34. , the metal cover 34 is attached to the other face of the end of the metal frame 24 by suitable means such as welding and caulking and the assembly of the converter body is completed. Next, the rubber gasket 10 fits into the slot 8 of the first box 2, corresponding to the cuts 11a and 4a, then, the body of the converter is housed in the first box 2, the rubber packing 33 is loaded in the cut 4a and the coaxial line 32 projects from the first box 2. Subsequently, when the second box 12 is combined with the first box 2, which corresponds to the cuts 14a and 4a, first the end of the hook 18 comes into contact with each end face of the upper, lower and side walls 3, 4 , 5 and 7 of the first box 2, when the second box 12 is further pushed in this state, the hook 18 is tilted inwardly by the elasticity of the second box 12, when the end of the hook 18 is located in the concave portion of adjustment 9, the hook 18 is restored in the original state, the hook 18 is locked in the concave adjustment portion 9 and the first and second boxes 2 and 12 are combined and integrated. The converter assembly for receiving satellite transmission 1 is completed as described above, after assembly, the converter body is housed in the first and second boxes 2 and 12, the patch antennas 21 are opposite the thin piece 16a of the second box 12, each end face of the upper, lower and side walls 13, 14, 15 and 17 of the second box 12 is pressed into the rubber gasket 10, the cut 14a is pressed into the rubber gasket 33, the rubber gaskets 10 and 33 are compressed and the inner part of the first and second boxes 2 and 12 are sealed. The converter to receive satellite transmission 1 that was assembled as described above joins the concave parabolic reflector that is not shown , a radio wave is transmitted from a satellite in the thin part 16a of the second box 12 by means of the aforesaid parabolic reflector, it is received by the patch antennas 21, an amplifier is amplified received signal that was acquired as described above and the frequency respectively converted by the circuit 22, is output from the coaxial line 32 and is fed to the non-displayed receiver of the television set, of the VCR, among others. Since the entire periphery of the circuit 22 is covered with the thin copper foil 22 formed on a surface of the printed circuit board 19, the metal frame 24 and the metal cover 34, noise can be prevented from the outside of the converter to receive the satellite transmission 1, and stable and precise operation is made possible without being influenced by external noises. The present invention is modalized in the modality described above and produces the following effect. Since the printed circuit board and the antenna element provided to the printed circuit board are provided to receive a radio wave from a satellite by means of the parabolic reflector, the antenna element is composed of patch antennas made of thin sheets. Conductors and are formed on a surface of the printed circuit board, a radio wave may be received from a satellite without using a die casting frame and the converter may be provided to receive satellite transmission where the cost may be reduced. In this case, when printing and engraving are used to form the antenna element, the antenna element can simply be formed on the printed card and is effective to reduce the cost. If the metal frame is provided for attaching the printed circuit board and the metal cover attached to the metal frame, the printed circuit board is attached to one side of the end of the metal frame in a state in which the antenna element is exposed externally. , the metal cover is attached to the other side of the end of the metal frame, and the printed circuit board, the metal frame and the metal cover, the printed circuit board, the metal frame and the metal cover are integrated as one piece in a procedure to assemble the converter to receive satellite transmission and since they are easy to treat, productivity can be improved. Furthermore, if the first and second boxes made of synthetic resins which combine, integrate and respectively form a housing are provided, the thin piece is formed in the second box, the printed circuit board, the metal frame and the metal cover are housed in the first and second boxes, the antenna element and the thin piece are opposed, the inner part of the first and second boxes are sealed, the antenna element can receive a radio wave of a satellite by means of the thin piece, the sensitivity to receive from the antenna element can be improved, it can be prevented that a foreign material such as dust and water droplets invade the first and second boxes and the antenna element can receive stable and precisely a radio wave from a satellite without being influenced for such strange materials.

Claims (3)

NOVELTY OF THE INVENTION CLAIMS

1. - A converter for receiving satellite transmission, wherein: a printed circuit card and an antenna element provided to the printed circuit board are provided to receive a radio wave from a satellite by means of a parabolic receiver; said antenna element is composed of a plurality of patch antennas made of thin conductive sheets; and said antenna element is formed on a surface of said printed circuit board.

2. The converter for receiving satellite transmission according to claim 1, wherein: a metal frame is provided for attaching said printed circuit card and a metal cover attached to the metal frame; said printed circuit board is attached to one side of the end of said metal frame with said antenna element exposed on the outside; said metal cover is attached to the other face of the end of said metal frame; and said printed circuit board, said metal frame and said metal cover are integrated.

3. The converter for receiving satellite transmission according to claim 2, wherein: the first and second boxes made respectively of synthetic resin are provided which combine, integrate, and mutually form a housing; a thin piece is formed in the second box; said printed circuit board, said metal frame and said metal cover being housed in said first and second boxes, said antenna element and said thin piece being opposite; and the inner part of said first and second boxes is sealed.