JP2001119202A - Converter for satellite reception - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight converter for satellite reception. SOLUTION: This converter is provided with a feed horn 15 to which satellite broadcast radio waves are inputted, a printed circuit board 17 on which electronic components converting the radio broadcast radio waves into an electric signal are mounted, a shield case 16 covering the printed circuit board and an F type connector 18, and a pipe 61 and a corrugate 62 respectively made of different members are connected to the horn 15. Thus, it is possible to make the converter for satellite reception light in weight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a converter for receiving satellite broadcasting radio waves.

[0002]

2. Description of the Related Art A conventional satellite receiving converter will be described below. Figure 8 shows the installation of the satellite reception converter.
Shown in The conventional satellite receiving converter is a stay (pillar) 2
A dish (dish) 3 is mounted on the dish 3, and a satellite receiving converter 1 is mounted from the dish 3 via a mounting arm 4. The radio wave 5 transmitted from the satellite is reflected by the dish 3 and received by the satellite receiving converter 1. The received signal passes through the inside of the mounting arm 4 and is guided indoors.

Here, a conventional satellite receiving converter 1 will be described in detail with reference to FIG. FIG. 9 is an assembly diagram of the satellite receiving converter. In FIG. 9, a satellite receiving converter 1 is provided with a feed horn 6 for receiving a satellite broadcast radio wave 5, a shield case 7 provided in connection with the feed horn 6, and mounted in the shield case 7. A printed circuit board 8 on which an electronic component for converting the satellite broadcast radio wave 5 into an electric signal is mounted, and an F-type plug 9 for outputting the electric signal. In addition, a cover 10 was attached to the opening surface of the shield case 7 to seal the shield case 7. Numerals 11 and 12 denote outer casings that are divided at substantially the center, and wrap the feed horn 6 and the shield case 7 to form an external appearance. Reference numeral 13 denotes a fidome, which is attached to the front of the feed horn 6. Here, the feed horn 6 and the shield case 7 were made of aluminum die-cast or zinc die-cast, and were heavy.

[0004]

Since the satellite receiving converter 1 is mounted on the mounting arm 4 and mounted outdoors as shown in FIG. 8, it is robust against natural phenomena such as typhoons and tornadoes. Must be attached to In order to firmly mount the heavy satellite receiver converter 1, the mounting arm 4 needs to have sufficient strength against disasters, and there is a problem that both the mounting arms 4 must be reduced in weight. I was Therefore, if the weight of the satellite receiving converter 1, which is the root, is reduced, the weight of the mounting arm 4 can also be reduced accordingly, and highly stable satellite reception with high performance under natural conditions becomes possible. .

An object of the present invention is to solve such a problem and to provide a lightweight converter for satellite reception.

[0006]

In order to achieve the above object, a feed horn of a converter for satellite reception according to the present invention has a pipe and a corrugated body formed of separate members connected to each other. Thus, a lightweight satellite receiving converter can be realized.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a feed horn to which a satellite broadcast radio wave is inputted, and an electronic component connected to the feed horn and for converting the satellite broadcast radio wave into an electric signal. A printed circuit board, a shield case covering the printed circuit board, and an F-type plug for outputting the electric signal, wherein the feed horn is formed by connecting a pipe and a corrugate formed of separate members. Since the feed horn is made of a pipe, the feed horn can be made thinner and a lighter satellite receiver converter can be realized.

According to a second aspect of the present invention, there is provided a converter for satellite reception according to the first aspect, wherein the corrugate is formed of a conductive resin. Since the corrugate is made of a resin, the corrugate has a complicated shape. However, it can be manufactured with high accuracy. Further, since the thickness can be reduced and the specific gravity is small as compared with the aluminum die cast, the satellite receiving converter can be reduced in weight.

According to a third aspect of the present invention, there is provided a satellite receiving converter according to the first aspect, wherein the corrugate is formed of resin and at least an inner surface thereof is plated with metal. Therefore, the weight of the satellite receiving converter can be reduced. In addition, good electrical characteristics can be obtained because of the metal plating.

According to a fourth aspect of the present invention, there is provided the satellite receiving converter according to the first aspect, wherein aluminum is formed by forging. Since the corrugate is formed by forging aluminum, good electrical characteristics are obtained. Is obtained. In addition, since it is manufactured by forging, the processing time is shorter than that of aluminum die casting, the unit cost of parts can be reduced, and an inexpensive satellite receiving converter can be provided.

According to a fifth aspect of the present invention, there is provided a satellite receiving converter according to the first aspect, which is formed of carbon fiber reinforced plastic. Since the conductivity can be obtained without metal plating, the number of processing steps is reduced. It can be reduced, and the cost can be reduced.

According to a sixth aspect of the present invention, there is provided the converter for satellite reception according to the first aspect, wherein the inner surface of the corrugate is mirror-finished, and since the inner surface of the corrugate is mirror-finished, the reflection efficiency of radio waves is good. A high-performance satellite reception converter can be provided.

According to a seventh aspect of the present invention, there is provided the satellite receiving converter according to the fifth aspect, wherein the corrugate is connected to the outer periphery of the pipe by press-fitting. And the assembly is easy.

The invention according to claim 8 is the satellite receiving converter according to claim 5, wherein a screw is formed on the outer periphery of the pipe and a screw is formed on the inner periphery of the corrugate and connected to the screw. In addition, since the screws are formed and connected, the length of the feed horn can be changed in the radio wave entry direction of the feed horn, and the electrical characteristics can be adjusted to the optimum length.

According to a ninth aspect of the present invention, a surface of the printed circuit board which is continuous with the pipe is provided with a ground portion which is substantially equal to the outer periphery of the pipe and is connected to the pipe.
2. The satellite receiving converter according to claim 1, further comprising a probe formed in a pattern therein, wherein a ground portion substantially equal to the outer circumference of the feed horn pipe is provided, so that electrical connection between the pipe and the pattern is established. A stable and high-performance satellite reception converter can be obtained.

According to a tenth aspect of the present invention, a short plate having a depth of about a quarter wavelength is provided on the back surface of the surface of the printed circuit board to which the pipe is connected, opposite to the pipe. Item 9 is a satellite receiving converter according to Item 9, wherein a short plate is provided on the back surface of the surface of the printed circuit board to which the pipe is connected, so that the satellite receiving converter has a small number of components and has good performance.

The invention according to claim 11 is the satellite reception converter according to claim 9, wherein the corrugated side to which the satellite broadcast radio wave is input has a taper that opens outward.
Since it has a taper that opens outward, the directional characteristics are improved, and the recommended mounting range of the satellite receiving converter can be widened.

[0018] The pipe according to the twelfth aspect of the present invention is substantially identical to the pipe of the first aspect.
10. The satellite receiving converter according to claim 9, wherein said converter is made of an aluminum material having a thickness of 1 mm.
Since it is formed of an aluminum material having a thickness of m, the weight of the converter for satellite reception can be reduced.

According to a thirteenth aspect of the present invention, there is provided the satellite receiving converter according to the first aspect, wherein the shield case is formed of a sheet metal. Can be lighter.

According to a fourteenth aspect of the present invention, a main body of a resin-made outer case that integrally covers the feed horn and the shield case is provided on a front surface of the feed horn, and is waterproofly connected to the main body. 2. The satellite receiving converter according to claim 1, comprising a fidome, a cover provided on an F-type plug side of the shield case, and a waterproof connection with the main body. Therefore, the opening is not divided as in the conventional case and the opening of the outer case can be made smaller, and the sealed structure can be easily formed.

According to a fifteenth aspect of the present invention, there is provided the satellite receiving converter according to the fourteenth aspect, wherein a concave portion is formed in the main body portion, and a cover is mounted in the concave portion, wherein the cover is mounted in the concave portion of the main body portion. Therefore, the waterproofness can be improved.

According to a sixteenth aspect of the present invention, the extended portion is formed by extending the F-type plug side of the shield case, and the F-type plug is attached to the extended portion. Converter for satellite reception of
Since the extension part is formed by extending the mold plug side, when attaching the cable to the F plug at the time of installing the antenna, even if excessive force is applied to the F plug, it is safe without damage Can attach cable.

According to a seventeenth aspect of the present invention, there is provided a satellite receiver according to the first aspect, wherein a hole is provided in a connection portion of the pipe with the shield case, and a probe formed to extend from the printed board is projected into the hole. And a probe formed so as to extend from the printed circuit board into the hole of the feed horn so as to protrude, so that it is possible to provide a small and high performance satellite receiving converter.

The invention according to claim 18 is that the main body of the resin-made outer case which integrally covers the feed horn and the shield case is provided on the front surface of the feed horn and is connected to the main body by waterproofing. 18. The satellite receiving converter according to claim 17, comprising a fidome, and a cover provided on the F-type plug side of the shield case and waterproofly connected to the main body, wherein the outer case is integrally formed. Therefore, the opening for waterproof connection between the fidome and the cover can be reduced without being divided as in the related art, and the sealed structure can be easily formed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 2 is an assembled perspective view of a satellite receiving converter according to Embodiment 1 of the present invention. In FIG. 2, reference numeral 15 denotes a feed horn formed by press-fitting a corrugate 62 into a pipe 61 formed of an approximately 1 mm aluminum plate. Here, the feed horn will be described in detail with reference to FIG.

FIG. 1 is a sectional view of feed horn 15 of the satellite reception converter according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 61 denotes a pipe formed of aluminum. 62 is a corrugate made of carbon fiber reinforced plastic. Therefore, a suitable conductivity can be obtained without plating, and the number of processing steps can be reduced, so that a satellite receiving converter which is inexpensive can be obtained. In addition, this corrugated 62
Can be made lighter because it is made of resin. Furthermore, even a complicated shape can be formed relatively easily, and the thickness can be reduced, so that the weight can be reduced. The carbon fiber weight content of the carbon fiber reinforced plastic used here is 30%. In consideration of conductivity and moldability, this is the optimal content setting.

Further, since the pipe 61 is made of aluminum, it can be made thinner and lighter. In the present embodiment, the pipe 61 has an inner diameter of approximately 18 mm and an input frequency band of 12 GHz. The length is set to approximately 85 mm.

The sectional shape of the pipe 61 may be circular or rectangular. In the present embodiment, a circular shape is used. Corrugation 62 may be circular, elliptical, or square, but in any case, it is important to electrically and mechanically connect to pipe 61. This corrugate 6
The connecting portion 63 between the pipe 2 and the pipe 61 is configured such that the inside of the corrugate 62 is connected to the outside of the pipe 61.
The corrugate 62 formed of resin as described above is used for the pipe 6.
By press-fitting from the outside, the aluminum pipe 61 having good electric conductivity comes inside, so that the electric characteristics are improved.

Further, the connecting portion 63 may be formed by cutting a screw on the outside of the pipe 61 and cutting a screw on the inside of the corrugate 62 so as to be fitted to the screw, thereby connecting the pipe 61 and the corrugate 62 by screwing. it can. In this case, the length of the feed horn can be adjusted in the radio wave entry direction by cutting and connecting the screws, which is advantageous for image disturbance or the like.

In the present embodiment, the corrugate 62
Is formed of carbon fiber reinforced plastic, but the corrugate 62 may be formed of a general-purpose resin such as ABS, and at least the inner surface thereof may be plated with metal. A general-purpose resin does not function as a corrugate because it does not reflect radio waves. However, metal plating improves electrical characteristics and reduces weight.

The corrugate 62 may be formed by forging aluminum. In this case, it is possible to provide an inexpensive satellite receiving converter which has better electric characteristics than the resin, requires a shorter processing time than the aluminum die-casting, can reduce the unit cost of parts, and is inexpensive. Although the corrugate 62 has a concentric shape, by applying a mirror finish, the reflection efficiency of radio waves is improved, so that the reflection damage of radio waves is reduced.

Next, returning to FIG. 2, the entire satellite receiving converter according to the first embodiment of the present invention will be described again. In FIG. 2, reference numeral 16 denotes a shield case formed of a metal plate of about 1 mm, and a printed board 17 is mounted in the shield case 16. The printed circuit board 17 is provided with an electronic circuit for converting a satellite broadcast wave into an electric signal. The output signal of this electronic circuit is led out to the outside by an F-type plug 18.

In order to mount the F-type plug 18,
The mounting plate 19 is provided with a material about three times thicker than the thickness of the shield case 16. The printed board 17 is also attached to the attachment plate 19 at the same time. Reference numeral 20 denotes an outer case, which includes a feed horn 15 and a printed circuit board 17.
Is inserted.

A fidome 21 is mounted on the front face 15a of the feed horn 15. The fidome 21 and the outer case 20 are waterproofly connected so that rainwater or the like does not enter even when used outdoors. Also, the feed horn 15 side of the fidome 21, that is, the corrugate 62, opens outward.

A cover 23 is attached to the outer case 20 on the side of the F-type plug 18. This cover 2
3 also has a waterproof structure when attached to the outer case 20, so that rainwater or the like does not enter from the outside.
Reference numeral 24 denotes a short plate, which is attached to the printed board 17 in a direction opposite to the feed horn 15.

FIG. 3 is a sectional view of a satellite receiving converter. As shown in FIG. 3, the corrugation 62 of the feed horn 15 is open outward. In this embodiment, the length 15b of the opening is approximately 25 mm, and the opening angle 15c is approximately 90 degrees. By doing so, the satellite broadcast radio waves can be efficiently guided into the pipe 61 of the feed horn 15.

Further, the pipe 6 of the feed horn 15
1 is pressed against the printed circuit board 17. Further, a short plate 2 is provided on the opposite side of the printed board 17 from the pipe 61.
4 is soldered at a position corresponding to the pipe 61.

Next, the pipe 61 side of the printed circuit board 17 will be described in detail with reference to FIG. Reference numeral 25 denotes a circular ground pattern.
Is pressed against the pipe 61. In the ground pattern 25, a plurality of through holes 25a are provided at approximately 30 degrees intervals in the pattern (FIG. 6). And the electrical connection state is good.
Here, the cross section of the pipe 61 has been described as being circular, but may be rectangular. Reference numeral 26 denotes a probe for receiving a horizontally polarized wave of satellite broadcasting, and a vertical polarization probe 27 is provided at an angle of about 90 degrees from the probe 26.

The outputs of the probes 26 and 27 are guided to a first RF amplifier 28 as shown in FIG. The output of the first RF amplifier 28 is
The output of the second RF amplifier 29 is connected to one input of a mixer 31 via a filter 30 formed in a pattern. The other input of the mixer 31 is connected to the output of the local oscillator 32, and the mixer 31 mixes the signals. The mixer 31 outputs an intermediate frequency, and the intermediate frequency is output to the probes 26, 2 via the next IF amplifier 33.
7 is output to the F-type connector 18 mounted on the opposite side.

Reference numeral 34 denotes a power supply circuit, and power supplied to the F-type plug 18 is supplied to the power supply circuit 34 via a choke coil 35. Then, a power supply suitable for each circuit is generated by the power supply circuit 34, and the first RF amplifier 28, the second RF amplifier 29, the local oscillator 32,
The signals are supplied to the F amplifiers 33, respectively.

In FIG. 4, reference numeral 17 denotes a printed circuit board. The printed circuit board 17 is provided with a ground pattern 25 so that the pipe 61 is electrically connected. And the ground pattern 36 is provided on the opposite surface.
Is provided on the ground pattern 36.
4 are connected by solder 37. Also, no pattern is formed on the pipe 61 side 17a of the printed circuit board 17 and its back surface 17b. Since the depth of the short plate 24 is set to a quarter wavelength of the satellite broadcast radio wave, the input satellite broadcast radio wave is reflected here and input to the probe 26 or 27.

(Embodiment 2) FIG. 7 is a sectional view of a satellite reception converter according to Embodiment 2. In FIG. 7, the difference from the first embodiment is that
1a is provided, and a printed board 52 is inserted into the hole 51a. Numeral 53 denotes a shorting plate, which is mounted on the printed circuit board 52 at a position of a quarter wavelength of the satellite broadcast radio wave. Reference numeral 54 denotes a corrugate which is opened on the input side of the satellite broadcast radio wave, as in the first embodiment, and is formed of a separate member from the pipe 51. Other parts are the same as in the first embodiment.

[0044]

As described above, according to the present invention, a feed horn is formed by connecting a pipe and a corrugate each formed of a separate member. Thus, a lightweight satellite receiving converter can be realized. By reducing the weight of the satellite receiving converter in this way, it is possible to reduce the weight including the mounting arm, and it is possible to realize a satellite receiving converter which is very stable and has high performance under natural conditions.

[Brief description of the drawings]

FIG. 1 is a sectional view of a feed horn of a satellite reception converter according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the satellite receiving converter.

FIG. 3 is a sectional view of the satellite receiving converter.

FIG. 4 is a cross-sectional view of the vicinity of a printed circuit board and a feed horn of the satellite receiving converter.

FIG. 5 is a block diagram of the satellite reception converter.

FIG. 6 is a plan view of a main part of a printed circuit board of the satellite reception converter.

FIG. 7 is a sectional view of a satellite reception converter according to a second embodiment of the present invention.

FIG. 8 is an explanatory view of mounting a satellite reception converter.

FIG. 9 is an exploded perspective view of a conventional satellite receiving converter.

[Explanation of symbols]

 15 Feed Horn 16 Shield Case 17 Printed Circuit Board 18 F Type Plug 61 Pipe 62 Corrugated

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04B 1/18 H04B 1/18 A 5K062 H04N 7/20 630 H04N 7/20 630 (72) Inventor Paper source Ryuichi 1006 Kadoma Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. AA07 AA21 AB01 AB06 CA02 CA03 DA01 EA01 HA02 JA15 KA02 KA06 LA02 LA04 LA06 MA01 MA04 NA02 NA08 5K016 BA18 DA01 EA04 EA09 GA02 GA08 5K062 AA09 AB10 AD04 AD05 AE01 AE03 BC01 BC10 BF05 BF07

Claims (18)

[Claims] 1. A feed horn to which a satellite broadcast wave is input, a printed circuit board connected to the feed horn and mounted with an electronic component for converting the satellite broadcast wave into an electric signal, and a shield covering the printed circuit board A converter for satellite reception, comprising: a case; and an F-type connector for outputting the electric signal, wherein the feed horn is formed by connecting a pipe and a corrugate formed of separate members. 2. The satellite receiving converter according to claim 1, wherein the corrugate is formed of a conductive resin. 3. The corrugate is formed of a resin, and at least an inner surface thereof is metal-plated.
The satellite receiver converter as described. 4. The satellite receiving converter according to claim 1, wherein the corrugate is formed by forging aluminum. 5. The satellite receiving converter according to claim 1, wherein the corrugate is formed of carbon fiber reinforced plastic. 6. The satellite receiving converter according to claim 1, wherein the inner surface of the corrugate is mirror-finished. 7. The satellite receiving converter according to claim 5, wherein a corrugate is press-fitted to an outer periphery of the pipe. 8. The satellite receiving converter according to claim 5, wherein a screw is formed on the outer periphery of the pipe and a screw is formed on the inner periphery of the corrugate and connected to the screw. 9. A printed circuit board connected to a pipe on a surface thereof connected to the pipe by providing a ground portion substantially equal to the outer periphery of the pipe, and a probe formed in a pattern therein. 2. The satellite receiving converter according to 1. 10. The satellite receiving device according to claim 9, wherein a short plate having a depth of about a quarter wavelength is provided on the back surface of the surface of the printed circuit board to which the pipe is connected, opposite to the pipe. converter. 11. The satellite receiving converter according to claim 9, wherein the corrugated side to which the satellite broadcast radio wave is input has a taper that opens outward. 12. The converter according to claim 9, wherein the pipe is formed of an aluminum material having a thickness of about 1 mm. 13. The satellite receiving converter according to claim 1, wherein the shield case is formed of sheet metal. 14. A body part of a resin-made outer case integrally formed to cover the feed horn and the shield case, a fidome provided on a front surface of the feed horn and waterproofly connected to the body part, and the shield case. 2. The satellite receiving converter according to claim 1, further comprising a cover provided on the side of the F-type plug and waterproofly connected to the main body. 15. The satellite receiving converter according to claim 14, wherein a concave portion is formed in the main body, and a cover is attached to the concave portion. 16. The satellite receiving converter according to claim 14, wherein an F-shaped plug is formed by extending the F-shaped plug side of the shield case, and the F-shaped plug is attached to the extended portion. 17. The satellite receiving converter according to claim 1, wherein a hole is provided in a connection portion of the pipe with the shield case, and a probe formed to extend from the printed board is projected into the hole. 18. A body part of a resin-made outer case integrally formed to cover the feed horn and the shield case, a fidome provided on a front surface of the feed horn and connected to the body part in a waterproof manner, and the shield case. 18. The satellite receiving converter according to claim 17, comprising a cover provided on the side of the F-type plug and connected to the main body portion in a waterproof manner.