JP2008005461A - Satellite signal converter, antenna system and satellite broadcasting receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a satellite signal converter with improved noise-shielding performance. <P>SOLUTION: The satellite signal converter comprises a circuit board 3 on which electronic components, such as an IC 10 are disposed, a chassis 21 for supporting the circuit board 3, a frame 2 formed to cover the electronic components, and a ground electrode 7. The frame 2 includes a partition wall 2a. The electronic components are disposed in a space surrounded by the partition wall 2a. The ground electrode 7 includes a contact part 7c, formed to contact with the end face of the partition wall 2a and a through-part formed to pass through the circuit board 3. The chassis 21 includes a plurality of projections 21, formed regularly on a face thereof opposite the circuit board 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a satellite signal converter, an antenna device, and a satellite broadcast receiving device.

  In order to receive a signal such as satellite broadcast, a satellite broadcast receiver provided with an antenna device is used.

  FIG. 8 shows a schematic diagram of a general satellite broadcasting system. An incoming signal from the broadcast satellite 32 is received by the satellite broadcast receiver. The satellite broadcast receiving device includes a satellite broadcast tuner 33 and an antenna device 35. The antenna device 35 includes a parabolic antenna 31 and an LNB (Low Noise Block down) converter 30 as a satellite signal converter.

  Radio waves transmitted from the broadcasting satellite 32 are reflected by the surface of the parabolic antenna 31 and received by the LNB converter 30. The LNB converter 30 converts or amplifies the frequency of weak radio waves coming from the broadcast satellite 32.

  The signal whose frequency has been converted by the LNB converter 30 is transmitted to the satellite broadcast tuner 33. The satellite broadcast tuner 33 processes the signal and transmits the signal to the television receiver 34. The television receiver 34 displays video and images or outputs sound based on the received signal.

  FIG. 9 shows an enlarged perspective view of the main part of the antenna device. The antenna device 35 includes a parabolic antenna 31 and an LNB converter 30. The LNB converter 30 includes the waveguide 11. The LNB converter 30 includes a feed horn 13 disposed at the tip of the waveguide 11.

  The signal reflected by the parabolic antenna 31 is received through the feed horn 13 and the waveguide 11 of the LNB converter 30. Next, signal conversion is performed by an electric circuit arranged inside LNB converter 30. The configuration of the LNB converter is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-120348.

  In Japanese Patent Application Laid-Open No. 11-186774, an LNB shield in which an LNB circuit board is covered with a shield cover made of a conductive structure, screwed into a chassis of a primary radiator with a screw, and the LNB circuit board is electromagnetically shielded. A structure is disclosed. In this shield structure, it is disclosed that conductive rubber having a shape corresponding to the ground pattern is provided between the shield cover and the ground pattern of the LNB circuit board.

  In Japanese Patent Laid-Open No. 2000-36675, a circuit board is placed on a bottom plate of an external housing and fixed to the internal housing, and the internal housing is formed in a box shape having an open bottom surface. A housing structure of an electronic device that is fixed to an external housing by screws with a gap therebetween is disclosed. In this case structure, it is disclosed that a protrusion is provided at a tip portion that contacts the circuit board of the internal case.

  FIG. 21 shows a schematic cross-sectional view of a conventional LNB converter. The LNB converter includes a waveguide 11 and a circuit board 3. On the surface of the circuit board 3, a chip component 8 as an electronic component, a resonator 9, an IC (Integrated Circuit) 10, and the like are arranged. An electric circuit is formed on the surface of the circuit board 3.

  The circuit board 3 is fixed to the chassis 4. A lid member 1 is fixed to the chassis 4. The chassis 4 and the lid member 1 form a housing of the main body of the LNB converter. The LNB converter shown in FIG. 21 includes a frame 2 formed on the surface of the circuit board 3 so as to cover each electronic component. The frame 2 has a partition wall portion 2a and a ceiling portion 2b.

  The radio wave reflected from the surface of the parabolic antenna passes through the inside of the waveguide 11 and is received by an antenna probe (not shown), and a signal such as frequency conversion is processed by an electronic component arranged on the surface of the circuit board 3. . The processed signal is output to an F connector (F plug) 5. A cable for transmitting a signal to the satellite broadcasting tuner is connected to the F connector 5.

  Ground electrodes 7 are formed on the front and back surfaces of the circuit board 3. The ground electrode 7 is grounded by being in contact with the chassis 4. The ground electrode 7 is in contact with the frame 2.

Inside the space surrounded by the chassis 4 and the lid member 1, a radio wave absorber 12 for absorbing unnecessary radio waves (noise) is disposed on the back side of the lid member 1. Of the space surrounded by the frame 2 and the circuit board 3, for example, the radio wave absorber 12 is disposed in a space where the IC 10 is disposed. These radio wave absorbers are arranged to absorb unnecessary radio waves generated when signal processing is performed.
JP 2004-120348 A Japanese Patent Laid-Open No. 11-186774 JP 2000-36675 A

  Referring to FIG. 21, for example, the chassis 4 and the frame 2 of the LNB converter are made of Al die casting (cast product using a mold) made of aluminum. There are fine waviness and warpage on the surface of the Al die-cast product. For this reason, even on a surface that is considered to be a flat surface, strictly speaking, there may be a swell or warp having a height of 0.1 mm or less.

  FIG. 22 is a schematic cross-sectional view illustrating a problem of the LNB converter in the prior art. The chassis 4 may have small undulations on the surface. For example, as shown by the arrow 44, the chassis 4 has residual stresses in various directions that occur when it is manufactured by casting. Due to these internal residual stresses, a small swell or warp may appear on the surface of the chassis 4. Due to this swell or the like, a gap may appear between the chassis 4 and the ground electrode 7 formed on the surface of the circuit board 3.

  In some cases, unnecessary radio waves leak from a gap formed between the chassis 4 and the ground electrode 7. In this case, as shown in FIG. 21, the radio wave absorber 12 is disposed inside the housing, thereby preventing unnecessary radio waves from leaking to the outside. Alternatively, the radio wave absorber 12 is arranged in the space inside the frame 2 in which the electronic components are confined so as not to adversely affect the electronic components arranged on the surface of the circuit board 3.

  As described above, fine swells and warpages are developed even on the surface of the chassis, which is normally considered to be flat. In particular, with respect to high-frequency and microwave radio waves, there has been a problem that undulations on the surface of the chassis cause noise leakage. This noise has a problem of deteriorating the electrical characteristics of the satellite signal converter.

  It is an object of the present invention to provide a satellite signal converter, an antenna device, and a satellite broadcast receiving device that have excellent noise shielding performance.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, a frame formed so as to cover the electronic parts, and a ground electrode. The frame includes a partition portion for forming a plurality of partitioned spaces. The electronic component is disposed in the space surrounded by the partition wall. The ground electrode is disposed on a surface of the circuit board on the side where the electronic component is disposed, and includes a contact portion formed so as to be in contact with an end surface of the partition wall. The ground electrode includes a penetrating portion formed to penetrate the circuit board. The chassis has a plurality of protrusions regularly formed on a surface facing the circuit board.

  Preferably, in the above invention, the convex portion is formed in an arc shape or a quadrangular cross section.

  Preferably, in the above invention, the ground electrode includes a planar portion that is disposed on the surface of the circuit board opposite to the side on which the electronic component is disposed and is formed in a planar shape. The planar portion is formed so as to contact the chassis.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, a frame formed to cover the electronic parts, and a radio wave absorber. . The frame includes a partition wall and a ceiling for forming a plurality of partitioned spaces. The radio wave absorber is disposed inside the space. At least one of the partition wall and the ceiling has a plurality of recesses formed on the inner surface.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, and a frame formed so as to cover the electronic components. The frame includes a partition portion for forming a plurality of partitioned spaces. The frame includes an outer wall formed outside the partition wall so as to surround the circuit board. The chassis has a notch formed along the outer wall. In the frame, a part of the outer wall portion is inserted into the notch.

  Preferably, in the above invention, the outer wall portion is disposed such that an end surface thereof is separated from an inner surface of the notch portion.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, and a frame formed so as to cover the electronic components. The frame includes a partition portion for forming a plurality of partitioned spaces. The chassis has a first standing part standing from the surface. The first standing part is disposed outside the outermost partition part among the plurality of partition parts. The first standing part is formed along the outermost partition part among the plurality of partition parts. The first standing portion is formed so as to be higher than a boundary position between the circuit board and the frame.

  Preferably, in the above invention, the frame includes a ceiling portion formed in a planar shape. The first standing portion is formed so that the height is substantially the same as the outer surface of the ceiling portion.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, and a frame formed so as to cover the electronic components. The frame includes a partition portion for forming a plurality of partitioned spaces. The frame has an outer wall formed outside the partition wall so as to surround the circuit board. The outer wall portion has a groove-like insertion portion formed at the tip. The chassis has a second standing part standing from the surface. The second standing portion is formed along the insertion portion. At least a part of the second standing portion is inserted into the insertion portion.

  Preferably, in the above invention, the second standing portion is disposed away from the insertion portion. The tip of the outer wall portion is disposed away from the surface of the chassis.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, and a frame formed so as to cover the electronic components. The frame includes a partition wall and a ceiling for forming a plurality of partitioned spaces. At least one of the partition wall and the ceiling has a plurality of protrusions formed on the inner surface. The plurality of protrusions have regularly the same cross-sectional shape and are regularly arranged.

  Preferably, in the above invention, the protruding portion is formed so that the cross-sectional shape is a semicircle or a regular triangle.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, a frame formed so as to cover the electronic parts, and a ground electrode. The frame includes a partition portion for forming a plurality of partitioned spaces. The electronic component is disposed in the space surrounded by the partition wall. The ground electrode is disposed on a surface of the circuit board on the side where the electronic component is disposed, and includes a contact portion formed so as to be in contact with an end surface of the partition wall. In the partition wall, a projecting portion directed to the ground electrode is formed on an end surface in contact with the ground electrode. A plurality of the protrusions are formed along the direction in which the end face extends.

  Preferably, in the above invention, the protrusion is formed so that the cross-sectional shape of the tip is an arc.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, a frame formed so as to cover the electronic parts, a ground electrode, and the frame. And an interposition member disposed between the ground electrode. The frame includes a partition portion for forming a plurality of partitioned spaces. The electronic component is disposed in the space surrounded by the partition wall. The ground electrode includes a contact portion disposed on a surface of the circuit board on the side where the electronic component is disposed. The interposition member is formed to absorb radio waves emitted from the electronic component. The interposed member is disposed along a direction in which the end surface of the partition wall extends. The interposition member is disposed so as to contact the contact portion and the partition wall portion.

  Preferably, in the above invention, the partition wall has a groove on an end surface facing the ground electrode. The interposition member is fitted into the groove.

  A satellite signal converter according to the present invention includes a circuit board on which electronic components are arranged, a chassis for supporting the circuit board, a frame formed so as to cover the electronic parts, the chassis, and the frame. And a sealing member for forming a hermetic seal. The frame includes a partition portion for forming a plurality of partitioned spaces. The frame includes an outer wall formed outside the partition wall so as to surround the circuit board. The sealing member is disposed between the outer partition wall and the chassis. The sealing member is mixed with a conductive member.

  Preferably, in the above invention, the chassis has a cutout portion formed along the outer wall portion. In the frame, a part of the outer wall portion is inserted into the notch.

In the above invention, preferably, the conductive member includes carbon particles.
An antenna device according to the present invention includes the above-described satellite signal converter and a parabolic antenna.

  A satellite broadcast receiver according to the present invention includes the antenna device described above and a satellite broadcast tuner.

  According to the present invention, it is possible to provide a satellite signal converter, an antenna device, and a satellite broadcast receiving device that have excellent noise shielding performance.

(Embodiment 1)
With reference to FIG. 1 to FIG. 3, FIG. 8, and FIG. 9, a satellite signal converter, antenna device, and satellite broadcast receiving device according to the first embodiment of the present invention will be described. The satellite signal converter in the present embodiment is a device for receiving satellite broadcasts.

  FIG. 8 shows a schematic diagram of a general satellite broadcasting system. The satellite broadcast system includes a broadcast satellite 32 and a satellite broadcast receiver. The satellite broadcast receiving device includes a satellite broadcast tuner 33 and an antenna device 35. The antenna device 35 includes a parabolic antenna 31 as an antenna and an LNB (Low Noise Block down) converter 30 as a satellite signal converter.

  Radio waves from the broadcasting satellite 32 are reflected by the surface of the parabolic antenna 31 and received by the LNB converter 30. The LNB converter 30 performs frequency conversion, signal amplification, and the like.

  The signal whose frequency has been converted by the LNB converter 30 is transmitted to the satellite broadcast tuner 33. The satellite broadcast tuner 33 is disposed indoors, performs signal processing, and transmits a signal to the television receiver 34. The television receiver 34 displays video and images or outputs sound based on the received signal. The configuration of such a satellite broadcasting system device is the same as that of the satellite broadcasting system based on the conventional technology.

  FIG. 9 is a schematic perspective view of the main part of the antenna device. The parabolic antenna 31 of the antenna device 35 is formed so that the planar shape is circular. The parabolic antenna 31 has a cross-sectional shape, for example, an arc shape. The parabolic antenna 31 is formed so as to be focused inside the feed horn 13 formed at the tip of the LNB converter 30.

  The LNB converter 30 as a satellite signal converter includes a feed horn 13 and a waveguide 11. The radio wave reflected by the surface of the parabolic antenna 31 enters the feed horn 13. The radio wave incident on the inside of the feed horn 13 is transmitted to the inside of the main body of the LNB converter 30 through the waveguide 11. Thus, the LNB converter 30 is arranged so that the feed horn 13 faces the reflecting surface of the parabolic antenna 31.

  FIG. 1 shows a schematic cross-sectional view of the LNB converter in the present embodiment. The LNB converter in the present embodiment includes a chassis 21 and a lid member 1 as a casing. A chassis is formed by combining the chassis 21 and the lid member 1. The housing is formed in a box shape. An electric circuit for performing frequency conversion of radio waves is disposed inside the housing.

  The chassis 21 in the present embodiment is formed so as to support the circuit board 3. The chassis 21 is formed of a conductive material. The chassis 21 in the present embodiment is made of aluminum.

  The LNB converter in the present embodiment includes a circuit board 3 on which an electric circuit is formed. The electric circuit includes electronic components. As electronic components, a resonator 9, an IC 10, a chip component 8, and the like are arranged. For example, the resonator 9 is an electronic component for determining the oscillation frequency. Each electronic component is connected and fixed to a conductor wiring 6 formed on the main surface of the circuit board 3, for example. Each electronic component is arranged on one main surface of the circuit board 3. Each electronic component is disposed on the main surface of the circuit board opposite to the side facing the chassis 21.

  The LNB converter in the present embodiment includes a ground electrode 7. The earth electrode 7 is grounded. The ground electrode 7 includes a planar portion 7 a formed in a planar shape along the other main surface of the circuit board 3. The planar portion 7a is formed in a plate shape. The planar portion 7 a is disposed on the main surface of the circuit board 3 on the side opposite to the main surface on which electronic components such as the resonator 9 are disposed. The planar portion 7 a is in contact with the chassis 4. The planar portion 7 a is electrically connected to the chassis 4.

  The ground electrode 7 has a penetrating part 7 b formed so as to penetrate the circuit board 3. The penetration part 7b is arrange | positioned between the area | regions where each electronic component is arrange | positioned. The ground electrode 7 has a contact portion 7c disposed on one main surface of the circuit board. The contact portion 7c is arranged so as to surround each electronic component. The contact portion 7 c is in contact with the frame 2. The contact portion 7 c is electrically connected to the frame 2.

  The LNB converter in the present embodiment includes a frame 2. The frame 2 is disposed on one main surface of the circuit board 3. The frame 2 and the circuit board 3 are disposed inside the housing. Frame 2 in the present embodiment includes a ceiling portion 2b and a partition wall portion 2a for forming a plurality of partitioned spaces. The ceiling part 2b is formed in a planar shape. Electronic components such as the resonator 9 are arranged in a space surrounded by the partition wall 2a and the ceiling 2b.

  The partition wall portion 2 a is in contact with the contact portion 7 c of the ground electrode 7 at the end surface. The partition wall portion 2 a is formed so that the end surface is in surface contact with the ground electrode 7. In the LNB converter in the present embodiment, the chassis 21 is grounded. The frame 2 is grounded by being electrically connected to the chassis 21 via the ground electrode 7.

  The LNB converter includes a waveguide 11. The waveguide 11 is fixed to the chassis 21. The waveguide 11 is formed so as to be hollow inside. Inside the waveguide 11, there are disposed conversion ribs (not shown) for converting radio waves from circularly polarized light to linearly polarized light.

  The LNB converter in the present embodiment includes an F connector 5 arranged on the side of the circuit board 3. The F connector 5 is connected to electronic components arranged on the circuit board. The F connector 5 is fixed to the chassis 21. The F connector 5 is formed to be connectable to a cable for connecting to a satellite broadcasting tuner.

  The radio wave incident on the waveguide 11 travels through the waveguide 11 and is received by a receiving probe (not shown). The received signal is sent to an electric circuit formed on the circuit board 3. Electrical processing is performed by the electronic circuit, and the electric signal is output from the F connector 5 arranged on the side of the circuit board 3.

  The chassis 21 in the present embodiment has a convex portion 21a formed on the surface with which the planar portion 7a of the ground electrode 7 comes into contact. The convex portion 21 a is disposed in at least a part of the region facing the circuit board 3. The convex part 21a in this Embodiment is formed over the whole area | region where the planar part 7a contacts.

  FIG. 2 shows an enlarged schematic cross-sectional view of a contact portion between the chassis and the ground electrode. A plurality of convex portions 21 a are formed on the surface of the chassis 21 that faces the circuit board 3. The convex portion 21a in the present embodiment has an arc shape in cross section. The convex portion 21a is formed so that the planar shape is substantially circular. The convex portions 21a are regularly formed. The convex portion 21a in the present embodiment is formed so that the diameter when viewed in plan is 1 mm or less.

  By forming the convex portion 21 a on the surface of the chassis 21, the internal stress remaining at the time of casting can be dispersed as indicated by an arrow 41 when the chassis 21 is manufactured. For this reason, the wave | undulation, curvature, etc. which arise in the chassis 21 can be suppressed. The surface including the tops of the convex portions 21a of the chassis 21 is flat, and the warp or undulation of the circuit board 3 can be suppressed.

  Therefore, it is possible to suppress the occurrence of a gap between the partition wall portion 2a of the frame 2 and the contact portion 7c of the ground electrode 7, and it is possible to provide an LNB converter excellent in noise shielding performance. That is, it is possible to suppress noise from leaking to the outside or from entering from the outside. As a result, the electrical characteristics are improved. Or the electromagnetic wave absorber arrange | positioned in the inner surface of the flame | frame or the housing | casing in the prior art becomes unnecessary.

  In the satellite signal converter according to the present embodiment, the partition wall portion 2a of the frame 2 and the contact portion 7c of the earth electrode 7 can be reliably brought into contact with each other, and the frame 2 can be reliably grounded. Or the convex part 21a of the chassis 21 and the planar part 7a of the earth electrode 7 can be made to contact reliably, and the flame | frame 2 can be earth | grounded reliably. As a result, the electrical characteristics are improved.

  In the present embodiment, the convex portion formed on the surface of the chassis 21 is formed in an arc shape in cross section, but is not limited to this form, and any shape can be adopted.

  FIG. 3 shows an enlarged schematic cross-sectional view of another chassis in the present embodiment. The chassis 22 has a convex portion 22a. The convex portion 22a is formed so that the cross-sectional shape is substantially rectangular. The convex part 22a is formed in a rectangular parallelepiped shape. The chassis 22 has grooves 22 formed in a lattice pattern on the surface, so that convex portions 22a are formed. The convex portion 22a in the present embodiment is formed so as to have a quadrangular shape when viewed in plan.

  The groove portion 22b around the convex portion 22a in the present embodiment is formed so that the cross-sectional shape is a quadrangle. The groove 22b is formed to have a width of 1 mm and a depth of 0.5 mm or less. Moreover, it forms so that the space | interval of the groove parts 22b may be set to about 5 mm.

  By forming the convex portion 22a having a quadrangular cross section, the internal stress can be directed in a certain direction as shown by the arrow 42, and the surface including the top surface of the convex portion 22a can be made flat. can do.

  The chassis in the present embodiment can be easily formed by forming a part corresponding to a mold for casting.

  The antenna device in the present embodiment includes the above-described LNB converter. With this configuration, it is possible to provide an antenna device that has excellent noise shielding ability and excellent electrical characteristics.

  The satellite broadcast receiving device in the present embodiment includes the above-described antenna device. With this configuration, it is possible to provide a satellite broadcast receiving apparatus that is excellent in noise shielding capability and excellent in electrical characteristics.

  The chassis in the present embodiment is made of Al, but is not limited to this form, and the chassis may be formed by casting. For example, the chassis may be made of zinc (Zn).

  In the present embodiment, the LNB converter has been described as an example of the satellite signal converter. However, the present invention is not limited to this embodiment, and the present invention can be applied to any satellite signal converter. For example, the present invention can be applied to a satellite signal converter of a satellite communication receiver.

(Embodiment 2)
With reference to FIG. 4, a satellite signal converter, an antenna device, and a satellite broadcast receiving device according to the second embodiment of the present invention will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 4 is an enlarged schematic cross-sectional view of the circuit board portion of the LNB converter in the present embodiment. The circuit board 3 is arranged inside the housing in the same manner as the LNB converter in the first embodiment.

  The LNB converter in the present embodiment includes a chassis 4. The surface of the chassis 4 is formed in a flat shape. The LNB converter in the present embodiment includes a frame 20. The frame 20 has a partition wall portion 20a and a ceiling portion 20b. In the space surrounded by the partition wall portion 20a and the ceiling portion 20b, a radio wave absorber is disposed in addition to the electronic circuit such as the resonator 9 (not shown).

  A concave portion 20c is formed on the surface of the ceiling portion 20b facing the electronic component disposed on the circuit board 3. A plurality of recesses 20c are regularly formed. The recess 20c in the present embodiment is formed so that the cross-sectional shape is an arc.

  Since the concave portion is formed on the inner surface of the ceiling portion 20 b of the frame 20, unnecessary radio waves are irregularly reflected in a space surrounded by the partition wall portion 20 a and the ceiling portion 20 b as indicated by an arrow 43. For this reason, the absorption effect of the radio wave absorber can be enhanced. Leakage of unnecessary radio waves from the space surrounded by the partition wall portion 20a and the ceiling portion 20b can be reduced. As a result, the electrical characteristics can be improved.

  The recess 20c in the present embodiment is formed so that its diameter when viewed in plan is 2 mm or less. Further, the recess 20c is formed to have a depth of 1 mm or less.

  In the present embodiment, the concave portion is formed on the inner surface of the ceiling portion 20b of the frame 20. However, the present invention is not limited to this configuration, and the concave portion may be formed on the inner surface of the partition wall portion 20a. Further, the shape of the recess is not limited to the arc shape in cross section, and any shape can be adopted.

  When the frame in the present embodiment is manufactured by casting, it can be easily formed by forming a portion corresponding to a mold in casting.

  Since other configurations, operations, and effects are the same as those in the first embodiment, description thereof will not be repeated here.

(Embodiment 3)
With reference to FIG. 5, a satellite signal converter, an antenna device, and a satellite broadcast receiving device according to a third embodiment of the present invention will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 5 is a schematic cross-sectional view of the end portion of the circuit board of the LNB converter in the present embodiment. The circuit board 3 is arranged inside the housing in the same manner as the LNB converter in the first embodiment. Similar to the LNB converter in the first embodiment, the IC 10 or the like as an electronic component is arranged on the surface of the circuit board 3.

  The LNB converter in the present embodiment includes a frame 24. The frame 24 has a partition wall portion 24a and a ceiling portion 24b. The frame 24 has an outer wall portion 24c formed outside the partition wall portion 24a. The outer side wall portion 24 c is disposed outside the end surface of the circuit board 3. The outer side wall portion 24 c is formed so as to surround the circuit board 3. The outer wall portion 24 c is formed over the entire circumference of the circuit board 3.

  The chassis 23 has a cutout portion 23a formed along the outer wall portion 24c. The notch 23a is formed in a groove shape. The notch 23 a is formed so as to surround the circuit board 3. The outer wall portion 24c is formed so that a part thereof is inserted into the notch portion 23a. The outer wall portion 24c is arranged such that the end surface is separated from the inner surface of the notch portion 23a. The outer wall portion 24c is formed so that the tip does not contact the bottom surface of the notch portion 23a.

  The notch 23a in the present embodiment is formed such that the groove-shaped width is 1.5 mm or less and the groove-shaped depth a is 1.5 mm or less. Further, the gap b between the outer wall portion 24c and the bottom surface of the notch portion 23a is formed to be 0.5 mm or less.

  The frame 24 in the present embodiment includes an outer wall portion 24 c, and a part of the outer wall portion 24 c is inserted into a notch portion 23 a formed in the chassis 23. With this configuration, noise leaked outside from the space surrounded by the partition wall 24a can be shielded by the outer wall 24c. Alternatively, intrusion of unnecessary radio waves from the outside can be prevented. As a result, an LNB converter having excellent electrical characteristics can be provided. Alternatively, since the noise shielding performance is improved, it is possible to eliminate the radio wave absorber disposed inside the housing in the conventional technique.

  In the present embodiment, the end surface of the outer wall portion 24c is arranged away from the inner surface of the notch portion 23a. With this configuration, it is possible to suppress the outer wall portion 24c from coming into contact with the cutout portion 23a, the frame 24 being lifted, and the occurrence of a gap between the partition wall portion 24a and the contact portion 7c of the ground electrode 7.

  When the chassis and frame in the present embodiment are manufactured by casting, they can be easily formed by forming a portion corresponding to a mold in casting.

  Since other configurations, operations, and effects are the same as those in the first embodiment, description thereof will not be repeated here.

(Embodiment 4)
With reference to FIG. 6, a satellite signal converter, an antenna device, and a satellite broadcast receiving device according to a fourth embodiment of the present invention will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 6 is a schematic cross-sectional view of the end portion of the circuit board of the LNB converter in the present embodiment. The circuit board 3 is arranged inside the housing in the same manner as the LNB converter in the first embodiment. Similar to the LNB converter in the first embodiment, the IC 10 or the like as an electronic component is arranged on the surface of the circuit board 3.

  The LNB converter in the present embodiment includes a chassis 27. The chassis 27 has a first standing portion 27a standing from the surface. The first standing portion 27a is formed so as to protrude from the inner surface of the chassis 27 on which the circuit board 3 is disposed. The first standing portion 27a is formed in a plate shape.

  The first standing portion 27 a is disposed outside the outermost partition wall portion 2 a among the partition wall portions 2 a of the frame 2. The first standing portion 27a is formed along the outermost partition 2a. The first standing portion 27 a is formed so as to surround the circuit board 3. The first standing portion 27 a is formed over the entire circumference of the circuit board 3.

  The first standing portion 27a is formed to be higher than the position of the end surface of the partition wall portion 2a. The first standing portion 27 a is formed to be higher than the boundary portion between the partition wall portion 2 a of the frame 2 and the circuit board 3. The first standing portion 27a is formed to be higher than a region where the contact portion 7c of the ground electrode 7 is formed. The first standing portion 27a in the present embodiment is formed so as to be substantially the same height as the outer surface of the ceiling portion 2b of the frame 2.

  By forming the first standing portion 27 a in the chassis 27, unnecessary radio waves leaking to the outside of the frame 2 can be shielded. Alternatively, unnecessary radio waves can be prevented from entering the inside of the frame 2 from the outside. As a result, the electrical characteristics can be improved.

  In addition, the first standing portion in the present embodiment is formed to have substantially the same height as the outer surface of the ceiling portion of the frame. With this configuration, it is possible to reliably shield noise from the circuit board and the frame.

  When the chassis in the present embodiment is manufactured by casting, it can be easily formed by forming a portion corresponding to a mold in casting.

  Since other configurations, operations, and effects are the same as those in the first embodiment, description thereof will not be repeated here.

(Embodiment 5)
With reference to FIG. 7, a satellite signal converter, an antenna device, and a satellite broadcast receiving device according to a fifth embodiment of the present invention will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 7 is a schematic cross-sectional view of the end portion of the circuit board of the LNB converter in the present embodiment. The circuit board 3 is arranged inside the housing in the same manner as the LNB converter in the first embodiment. Similar to the LNB converter in the first embodiment, the IC 10 or the like as an electronic component is arranged on the surface of the circuit board 3.

  The LNB converter in the present embodiment includes a chassis 25. The chassis 25 includes a second standing portion 25a. The 2nd standing part 25a is formed in the main surface by which the circuit board 3 is arrange | positioned among the main surfaces of the outer side of the chassis 25, and an inner side. The second standing portion 25a is formed in a plate shape. The second standing portion 25 a is disposed outside the circuit board 3.

  The frame 26 in the present embodiment includes a partition wall portion 26a and a ceiling portion 26b. The frame 26 includes an outer wall portion 26c. The outer side wall part 26c is arrange | positioned on the outer side of the partition part 26a arrange | positioned at the outermost side among several partition part 26a. The outer side wall portion 26 c is formed outside the circuit board 3. The outer side wall portion 26 c is formed so as to surround the circuit board 3. The outer wall portion 26 c is formed over the entire circumference of the circuit board 3.

  The frame 26 has an insertion portion 26d formed at the end of the outer wall portion 26c. The insertion portion 26d is formed on the end surface of the outer wall portion 26c. The insertion portion 26d is formed at the tip of the outer wall portion 26c. The insertion portion 26d is formed in a groove shape. In the present embodiment, a part of the second standing portion 25a is inserted into the insertion portion 26d.

  In the LNB converter according to the present embodiment, the second standing portion 25a formed in the chassis 25 is inserted into the insertion portion 26d formed in the frame 26, so that the electronic component is placed outside from the space where the electronic component is disposed. Leaked unwanted radio waves can be shielded. Moreover, it is possible to prevent unnecessary radio waves from entering the space where the electronic components are arranged from the outside.

  In the present embodiment, the outer wall 26 c is formed so that the tip (end surface) of the outer wall portion 26 c does not contact the main surface of the chassis 25. With this configuration, the end surface of the outer wall portion 26c and the main surface of the chassis 25 are in contact with each other, and a gap is generated between the partition wall portion 26a of the frame 26 and the contact portion 7c of the ground electrode 7 to leak noise. Can be prevented. Alternatively, noise can be prevented from entering from the outside. The gap c between the tip of the outer wall portion 26c and the main surface of the chassis 25 is preferably formed to be not less than 0.3 mm and not more than 0.5 mm.

  In the present embodiment, the top surface of the second standing portion 25a is formed so as not to contact the inner surface of the insertion portion 26d of the frame 26. With this configuration, the top surface of the second standing portion 25a and the inner surface of the insertion portion 26d come into contact with each other due to manufacturing errors, and a gap is formed between the partition wall portion 26a of the frame 26 and the contact portion 7c of the ground electrode 7. It is possible to prevent noise from leaking. Alternatively, noise can be prevented from entering from the outside. The gap d between the top surface of the second standing portion 25a and the inner surface of the insertion portion 26d is preferably formed to be not less than 0.3 mm and not more than 0.5 mm.

  When the chassis and frame in the present embodiment are manufactured by casting, they can be easily formed by forming a portion corresponding to a mold in casting.

  Since other configurations, operations, and effects are the same as those in the first embodiment, description thereof will not be repeated here.

(Embodiment 6)
With reference to FIGS. 10 to 14, a satellite signal converter, an antenna device, and a satellite broadcast receiving device according to the sixth embodiment will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 10 is a schematic bottom view of the frame in the present embodiment. FIG. 10 is a diagram when the F (flat) plane of the frame is viewed in a plan view. The frame 51 has a partition wall 51a, and a plurality of partitioned spaces are formed by the partition wall 51a, as in the first embodiment. The waveguide portion 59 is a portion corresponding to the waveguide.

  FIG. 11 is a schematic cross-sectional view of the LNB converter in the present embodiment. The LNB converter in the present embodiment includes a frame 51. The frame 51 has a partition wall portion 51a and a ceiling portion 51b. A partitioned space is formed by the partition wall 51a and the ceiling 51b. A resonator 9 and an IC 10 as electronic components are arranged in this partitioned space.

  The partition wall 51a in the present embodiment has a plurality of protrusions 51c formed on the inner surface. The plurality of protrusions 51c have substantially the same cross-sectional shape. The plurality of protruding portions 51c are regularly arranged. The protrusion 51c in the present embodiment is formed so that the cross-sectional shape is a semicircle. That is, the protrusion 51c is formed to be hemispherical.

  FIG. 12 shows an enlarged schematic cross-sectional view of the frame of the LNB converter in the present embodiment. FIG. 12 is a cross-sectional view taken along a plane perpendicular to the direction in which the partition wall portion stands. With reference to FIGS. 11 and 12, the plurality of protrusions 51c are formed on the inner surfaces of the respective spaces. The protrusions 51c have substantially the same cross-sectional shape. The plurality of protruding portions 51c are regularly arranged.

  In the LNB converter according to the present embodiment, even if unnecessary radio waves enter the respective spaces where the electronic components are arranged, the unnecessary radio waves are scattered on the surface of the partition wall portion 51a where the protruding portions 51c are arranged. Can do. For this reason, it can suppress that an unnecessary electromagnetic wave becomes strong locally, and can suppress the leakage of an unnecessary electric wave. Alternatively, leakage of unnecessary radio waves oscillated when the electronic component is driven can be suppressed. As described above, by forming the plurality of protruding portions 51c in the partition wall 51a, unnecessary radio waves can be effectively confined in the space surrounded by the partition wall 51a and the ceiling 51b, and the shielding capability of unnecessary radio waves is improved. .

  The protrusions in the present embodiment are formed so that the cross-sectional shape is a semicircle. With this configuration, unnecessary radio waves can be scattered isotropically, and local radio waves can be more effectively suppressed from becoming stronger. For this reason, leakage of unnecessary radio waves can be more reliably suppressed.

  FIG. 13 is a schematic cross-sectional view of another LNB converter in the present embodiment. Another LNB converter includes a frame 52. The frame 52 includes a partition wall portion 52a. The frame 52 includes a ceiling portion 52b. In other LNB converters, a plurality of protrusions 52c are formed on the surface of the partition wall 52a. The protrusion 52c is formed so that the cross-sectional shape is a regular triangle. That is, the protrusion 52c is formed in a regular triangular pyramid shape.

  FIG. 14 is an enlarged schematic cross-sectional view of a frame of another LNB converter in the present embodiment. FIG. 14 is a cross-sectional view taken along a plane perpendicular to the direction in which the partition wall portion stands. The protrusion 52c is formed in each space where electronic components are arranged.

  Also in other LNB converters in the present embodiment, unnecessary radio waves can be scattered by the protrusions 52c formed on the inner surface of the partition wall 52a, and leakage of unnecessary radio waves can be suppressed. Unwanted radio waves can be confined in each space formed by the frame 52.

  Further, the protrusion 52c of the frame 52 of another LNB converter is formed so that the cross-sectional shape is a regular triangle. With this configuration, unnecessary radio waves can be scattered isotropically, and leakage of unnecessary radio waves can be more effectively suppressed.

  The frame in the present embodiment can be easily manufactured, for example, by forming a portion corresponding to the protruding portion in the mold when manufacturing by casting.

  In the present embodiment, the radio wave absorber is not disposed in the space partitioned by the frame, but the present invention is not limited to this configuration, and the radio wave absorber may be disposed in the space partitioned by the frame. . With this configuration, it is possible to absorb unnecessary radio waves existing in each space, and it is possible to more effectively suppress leakage of unnecessary radio waves.

  In the present embodiment, a plurality of protrusions are formed on the partition wall of the frame. However, the present invention is not limited to this configuration, and a plurality of protrusions may be formed on at least one of the partition wall and the ceiling. Absent.

  Since other configurations, operations, and effects are the same as those in the first or second embodiment, description thereof will not be repeated here.

(Embodiment 7)
With reference to FIG. 15 to FIG. 17, a satellite signal converter, an antenna device, and a satellite broadcast receiver in Embodiment 7 will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 15 is a schematic cross-sectional view of the LNB converter in the present embodiment. The LNB converter in the present embodiment includes a frame 53. The frame 53 has a partition wall 53a. The frame 53 has a ceiling portion 53b. The partition wall 53a and the ceiling 53b form a space in which electronic components are arranged. The frame 53 is fixed to the circuit board 3 in a state where the partition wall 53 a is pressed toward the contact portion 7 c of the ground electrode 7.

  FIG. 16 shows an enlarged schematic bottom view of the frame in the present embodiment. The frame 53 in the present embodiment has a protrusion 53c. The protrusion 53c is formed on the end surface of the partition wall 53a. The protrusion 53 c is formed on the surface where the partition wall 53 a comes into contact with the ground electrode 7. In the present embodiment, a plurality of protrusions 53c are formed.

  A plurality of protrusions 53c are formed along the direction in which the end surface of the partition wall 53a extends. The protrusion 53c is formed to be smaller than the width of each partition wall 53a. The protrusion 53c is formed in a size corresponding to the width of the partition wall 53a.

  FIG. 17 shows an enlarged schematic cross-sectional view of the protruding portion in the present embodiment. The protrusion 53c is formed so as to protrude toward the ground electrode. The protrusion 53c is formed so that the cross-sectional shape of the tip is an arc. The protrusion 53c is formed so that the tip is hemispherical.

  The protrusion 53c in the present embodiment is formed in a columnar shape. The protrusion 53c is formed in a cylindrical shape. The protrusion 53c is formed so that the diameter when viewed from above is 1 mm or less. The protrusion 53c is formed to have a height of 0.1 mm or less.

  In the LNB converter according to the present embodiment, the protrusion 53 c formed on the end surface of the partition wall 53 a of the frame 53 is in pressure contact with the contact portion 7 c of the earth electrode 7. For this reason, poor contact between the frame 53 and the ground electrode 7 can be suppressed, and leakage of unnecessary radio waves can be suppressed. As a result, the shielding effect of the frame can be enhanced. Unwanted radio wave shielding performance is improved.

  In the present embodiment, the circuit board 3 is partially bent by the frame 53 being pressed against the circuit board 3. For this reason, the projection part 53c bites into the contact part 7c of the ground electrode 7, and the contact failure of the flame | frame 53 and the ground electrode 7 can be suppressed more reliably.

  The protrusions in the present embodiment are formed so that the cross-sectional shape of the tip is an arc. With this configuration, when the protrusion is pressed against the ground electrode, the contact area between the ground electrode and the protrusion is increased. As a result, it is possible to more reliably suppress leakage of unnecessary radio waves.

  The protrusions in the present embodiment are formed so that the diameter when viewed in plan is 1 mm or less. With this configuration, the protrusion can be effectively bited into the ground electrode, and the protrusion and the ground electrode can be more reliably brought into contact with each other. Further, the protrusion can be easily formed. Furthermore, the diameter of the protrusion when viewed in plan is more preferably 0.05 mm or more and 0.1 mm or less.

  The protrusion 53c in the present embodiment is formed to have a height of 0.1 mm or less. With this configuration, it is possible to make the protrusion 53c difficult to be effectively inserted into the ground electrode. If the protrusion is too high, a part of the protrusion may float from the surface of the ground electrode, and a gap may be generated between the partition wall and the ground electrode. By setting the height of the protrusion 53c to 0.1 mm or less, it is possible to suppress a gap from being generated between the partition wall and the ground electrode.

  The frame in the present embodiment can be easily manufactured, for example, by forming a portion corresponding to the protruding portion in the mold when forming the mold.

  Although the projection part in this Embodiment is formed in columnar shape, it is not restricted to this form, Arbitrary shapes can be employ | adopted for a projection part. For example, the protrusion may be formed in a hemispherical shape. In addition, the protrusions in the present embodiment are formed so that the cross-sectional shape of the tip is an arc shape, but the shape is not limited to this, and any shape can be adopted as the shape of the tip of the protrusion. .

  In the present embodiment, the protrusions are formed in one row on the end face of the partition wall, but the present invention is not limited to this form, and a plurality of rows of protrusions may be formed. In addition, the protrusions in the present embodiment are formed at intervals, but the present invention is not limited to this form, and the protrusions may be formed so as to contact each other.

  Since other configurations, operations, and effects are the same as those in the first or second embodiment, description thereof will not be repeated here.

(Embodiment 8)
With reference to FIGS. 18 and 19, a satellite signal converter, an antenna device, and a satellite broadcast receiving device in the eighth embodiment will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 18 is a schematic cross-sectional view of the LNB converter in the present embodiment. The LNB converter in the present embodiment includes a frame 54. The frame 54 has a partition wall 54a. The frame 54 has a ceiling portion 54b.

  The LNB converter in the present embodiment has an interposed member 56. The interposition member 56 is disposed between the frame 54 and the ground electrode 7. The interposition member 56 is disposed so as to contact the contact portion 7c of the ground electrode 7 and the partition wall portion 54a. The interposition member 56 is sandwiched between the partition wall portion 54a and the contact portion 7c.

  Interposition member 56 in the present embodiment is formed to absorb radio waves. That is, the interposition member 56 in the present embodiment is a radio wave absorber. In the present embodiment, a groove 54c is formed on the end surface of the partition wall 54a. The interposition member 56 is disposed in the groove 54c. The interposition member 56 is fitted in the groove 54c.

  FIG. 19 shows an enlarged schematic bottom view of the frame in the present embodiment. The interposition member 56 is disposed along the direction in which the end surface of the partition wall 54a extends. The interposition member 56 is formed to be thinner than the thickness of each partition wall portion 54a.

  In the LNB converter according to the present embodiment, by arranging the interposition member on the end face of the frame, the unnecessary radio wave can be absorbed by the interposition member, and the intrusion of the unnecessary radio wave from the outside can be suppressed. Or it can suppress that an unnecessary electromagnetic wave leaks from the inside of the space enclosed by a partition part. As a result, unnecessary radio wave shielding performance is improved.

  The LNB converter in the present embodiment can be easily manufactured by forming a groove on the end face of the partition wall of the frame and disposing an interposition member in the groove.

  The interposition member in the present embodiment can suppress the occurrence of a gap between the interposition member and the partition wall portion by this configuration that is fitted in the groove formed on the end surface of the partition wall portion, and more reliably. Unwanted radio waves can be shielded.

  Since other configurations, operations, and effects are the same as those in the first or second embodiment, description thereof will not be repeated here.

(Embodiment 9)
Referring to FIG. 20, a satellite signal converter, an antenna device, and a satellite broadcast receiving device in the ninth embodiment will be described. The satellite signal converter in the present embodiment is an LNB converter.

  FIG. 20 is an enlarged schematic cross-sectional view of the end portion of the LNB converter in the present embodiment. The LNB converter in the present embodiment includes a frame 55. The frame 55 has a partition wall portion 55a. The frame 55 has a ceiling portion 55b. The frame 55 has an outer wall portion 55c. The outer side wall part 55c is disposed outside the outermost partition part 55a among the partition parts 55a. The outer side wall portion 55 c is formed so as to stand up with respect to the main surface of the circuit board 3.

  The LNB converter in the present embodiment includes a chassis 61. The chassis 61 has a notch 61a. The notch 61a is formed so that the outer wall 55c of the frame 55 can be inserted. The chassis 61 has a notch 61b. The notch 61b is formed outside the notch 61a. The notch 61a is formed along the outer wall 55c.

  The LNB converter in the present embodiment includes a sealing agent 62 as a sealing member for forming an airtightness between the chassis 61 and the frame 55. The sealing agent 62 is disposed between the outer wall portion 55 c and the chassis 61. The sealing agent 62 is filled in the notch 61b.

  In the sealing agent 62 in the present embodiment, conductive particles as a conductive member are mixed. In the present embodiment, carbon particles are mixed in the silicon sealant. A part of the outer wall 55c of the frame 55 is inserted into the notch 61a.

  In the LNB converter in the present embodiment, since the sealing member is disposed between the chassis 61 and the frame 55, the inside of the frame 55 can be kept airtight. Further, since the conductive member is mixed in the sealant, the sealant has a function as a radio wave absorber. Unwanted radio waves can be absorbed by the sealant 62, and intrusion and leakage of unnecessary radio waves can be suppressed. As a result, the shielding effect of unnecessary radio waves is improved.

  Further, in the frame 55 in the present embodiment, a part of the outer wall portion 55 c is disposed in the notch portion 61 a of the chassis 61. With this configuration, it is possible to suppress intrusion and leakage of unnecessary radio waves at the outer wall portion.

  In addition, the conductive member in the present embodiment includes carbon particles. With this configuration, the sealing member can easily have a function of absorbing radio waves. The ratio of the conductive member mixed in the sealing member is preferably adjusted according to the frequency of the radio wave to be handled or the frequency of the unnecessary radio wave oscillated from the electronic component arranged on the circuit board.

  Other configurations, operations, and effects are the same as those in any of Embodiments 1 to 3, and therefore description thereof will not be repeated here.

  In the respective drawings according to the above-described embodiments, the same or corresponding parts are denoted by the same reference numerals.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

1 is a schematic cross-sectional view of an LNB converter in a first embodiment. 2 is an enlarged schematic cross-sectional view of a portion of a chassis and a circuit board in Embodiment 1. FIG. FIG. 3 is an enlarged schematic cross-sectional view of a portion between another chassis and a circuit board in the first embodiment. FIG. 5 is an enlarged schematic cross-sectional view of a chassis and a frame portion in a second embodiment. FIG. 10 is an enlarged schematic cross-sectional view of a chassis and a frame portion in a third embodiment. FIG. 10 is an enlarged schematic cross-sectional view of a chassis and a frame portion in a fourth embodiment. FIG. 10 is an enlarged schematic cross-sectional view of a chassis and a frame portion in a fifth embodiment. 1 is a schematic diagram of a satellite broadcasting system. It is a perspective view of the principal part of an antenna device. FIG. 10 is a schematic bottom view of a frame in a sixth embodiment. 10 is an enlarged schematic cross-sectional view of a portion of a chassis and a frame of an LNB converter in Embodiment 6. FIG. FIG. 10 is an enlarged schematic cross-sectional view of a frame of an LNB converter in a sixth embodiment. FIG. 10 is an enlarged schematic cross-sectional view of a chassis and frame portion of another LNB converter in the sixth embodiment. FIG. 10 is an enlarged schematic cross-sectional view of a frame of another LNB converter in the sixth embodiment. FIG. 10 is a schematic sectional view of an LNB converter in a seventh embodiment. FIG. 10 is an enlarged schematic bottom view of a frame in a seventh embodiment. FIG. 10 is an enlarged schematic cross-sectional view of a protruding portion portion of a frame in a seventh embodiment. FIG. 10 is a schematic sectional view of an LNB converter in an eighth embodiment. FIG. 10 is an enlarged schematic bottom view of a frame in an eighth embodiment. FIG. 20 is an enlarged schematic cross-sectional view of a chassis and a frame portion in a ninth embodiment. It is a schematic sectional drawing of the LNB converter based on a prior art. It is an expansion schematic sectional drawing of the part of the chassis of an LNB converter based on a prior art, and a flame | frame.

Explanation of symbols

  1 Lid member 2, 20, 24, 26 Frame, 2a, 20a, 24a, 26a Bulkhead part, 2b, 20b, 24b, 26b Ceiling part, 3 Circuit board, 4, 21-23, 25, 27 Chassis, 5F Connector (F plug), 6 conductor wiring, 7 ground electrode, 7a planar portion, 7b penetrating portion, 7c contact portion, 8 chip component, 9 resonator, 10 IC, 11 waveguide, 12 radio wave absorber, 13 Feed horn, 21a, 22a convex part, 20c concave part, 22b groove part, 23a notch part, 24c, 26c outer side wall part, 25a, 27a standing part, 26d insertion part, 30 LNB converter, 31 parabolic antenna, 32 broadcast satellite, 33 tuner for satellite broadcasting, 34 television receiver, 35 antenna device, 41-44 arrow, 51-55 frame, 51a, 52 53a, 54a, 55a Bulkhead part, 51b, 52b, 53b, 54b, 55b Ceiling part, 51c, 52c Projection part, 53c Projection part, 54c Groove part, 55c Outer side wall part, 56 Interposition member, 59 Waveguide part, 61 Chassis, 61a, 61b Notch, 62 Sealing agent.

Claims (23)

A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component;
With a ground electrode,
The frame includes a partition portion for forming a plurality of partitioned spaces,
The electronic component is disposed in the space surrounded by the partition wall,
The ground electrode is disposed on a surface of the circuit board on the side where the electronic component is disposed, and a contact portion formed so as to be in contact with an end surface of the partition wall portion;
A penetrating part formed to penetrate the circuit board,
The chassis is a satellite signal converter having a plurality of protrusions regularly formed on a surface facing the circuit board.   The satellite signal converter according to claim 1, wherein the convex portion has a cross-sectional shape formed in an arc shape or a quadrangular shape. The ground electrode is disposed on the surface of the circuit board opposite to the side on which the electronic component is disposed, and includes a planar portion formed in a planar shape,
The satellite signal converter according to claim 1, wherein the planar portion is formed so as to contact the chassis. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component;
With an electromagnetic wave absorber,
The frame includes a partition portion and a ceiling portion for forming a plurality of partitioned spaces,
The radio wave absorber is disposed inside the space,
A satellite signal converter in which at least one of the partition wall and the ceiling has a plurality of recesses formed on an inner surface. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component,
The frame includes a partition portion for forming a plurality of partitioned spaces,
The frame includes an outer wall formed outside the partition wall so as to surround the circuit board,
The chassis has a notch formed along the outer wall,
The frame is a satellite signal converter in which a part of the outer wall is inserted into the notch.   The satellite signal converter according to claim 5, wherein an end surface of the outer wall portion is disposed away from an inner surface of the notch portion. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component,
The frame includes a partition portion for forming a plurality of partitioned spaces,
The chassis has a first standing part standing from the surface,
The first standing part is disposed outside the outermost partition part among the plurality of partition parts,
The first standing part is formed along the outermost partition part among the plurality of partition parts,
The satellite signal converter, wherein the first standing portion is formed to be higher than a position of a boundary between the circuit board and the frame. The frame includes a ceiling formed in a planar shape,
The satellite signal converter according to claim 7, wherein the first standing portion is formed so that a height thereof is substantially the same as an outer surface of the ceiling portion. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component,
The frame includes a partition portion for forming a plurality of partitioned spaces,
The frame includes an outer wall formed outside the partition wall so as to surround the circuit board,
The outer wall portion has a groove-shaped insertion portion formed at the tip,
The chassis has a second standing part standing from the surface,
The second standing portion is formed along the insertion portion,
The satellite signal converter, wherein at least a part of the second standing portion is inserted into the insertion portion. The second upright portion is disposed apart from the insertion portion,
The satellite signal converter according to claim 9, wherein the outer wall portion has the tip disposed away from the surface of the chassis. A satellite signal converter according to any one of claims 1, 4, 5, 7, and 9,
An antenna device comprising a parabolic antenna. An antenna device according to claim 11,
A satellite broadcast receiver comprising a satellite broadcast tuner. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component,
The frame includes a partition portion and a ceiling portion for forming a plurality of partitioned spaces,
At least one of the partition wall and the ceiling has a plurality of protrusions formed on the inner surface,
The plurality of protrusions have a substantially same cross-sectional shape and are regularly arranged.   The satellite signal converter according to claim 13, wherein the protrusion is formed so that a cross-sectional shape thereof is a semicircle or a regular triangle. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component;
With a ground electrode,
The frame includes a partition portion for forming a plurality of partitioned spaces,
The electronic component is disposed in the space surrounded by the partition wall,
The ground electrode is disposed on a surface of the circuit board on the side where the electronic component is disposed, and includes a contact portion formed so as to contact an end surface of the partition wall portion,
In the partition wall, a projecting portion directed to the ground electrode is formed on an end surface in contact with the ground electrode,
A plurality of the protrusions are formed along a direction in which the end surface extends, and the satellite signal converter.   The satellite signal converter according to claim 15, wherein the protrusion is formed so that the cross-sectional shape of a tip thereof is an arc shape. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component;
An earth electrode;
An interposition member disposed between the frame and the ground electrode;
The frame includes a partition portion for forming a plurality of partitioned spaces,
The electronic component is disposed in the space surrounded by the partition wall,
The ground electrode includes a contact portion disposed on a surface of the circuit board on which the electronic component is disposed,
The interposition member is formed to absorb radio waves emitted by the electronic component,
The interposed member is disposed along a direction in which an end surface of the partition wall extends.
The interposition member is a satellite signal converter arranged so as to be in contact with the contact portion and the partition wall portion. The partition wall has a groove on the end surface facing the ground electrode,
The satellite signal converter according to claim 17, wherein the interposition member is fitted in the groove. A circuit board on which electronic components are arranged;
A chassis for supporting the circuit board;
A frame formed to cover the electronic component;
A sealing member for forming a hermetic seal between the chassis and the frame;
The frame includes a partition portion for forming a plurality of partitioned spaces,
The frame includes an outer wall formed outside the partition wall so as to surround the circuit board,
The sealing member is disposed between the outer partition wall and the chassis;
The sealing member is a satellite signal converter in which a conductive member is mixed. The chassis has a notch formed along the outer wall,
The satellite signal converter according to claim 19, wherein a part of the outer wall portion of the frame is inserted into the cutout portion.   The satellite signal converter according to claim 19, wherein the conductive member includes carbon particles. A satellite signal converter according to any one of claims 13, 15, 17, and 19,
An antenna device comprising a parabolic antenna. An antenna device according to claim 22,
A satellite broadcast receiver comprising a satellite broadcast tuner.

Images