JPH10233618A - Lnb device integrated with feed horn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the miniaturization of the low noise frequency converter LNB integrated with a feed horn and to reduce the cost. SOLUTION: A feed horn mount 2 is formed to a face of a tip of a synthetic resin made arm 1 toward a parabolic reflecting mirror which is projected in front of the parabolic reflecting mirror, a feed horn 3 formed by pressing a metallic plate is fitted to the mount 2, a screw 6 is inserted to each of holes made to the feed horn 3 and throughholes made to the feed horn mount 2 and threaded to each of lugs 5 placed at both sides of a case of the LNB 4 on the other side of an arm 1 so as to fasten the feed horn 3 and the case of the LNB 4 to the arm 1 and also to take electric continuity between the feed horn 3 and the case of the LNB 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed-phone-integrated LNB (low noise frequency converter) device, and more particularly to a device for reducing the size and cost of the device.

[0002]

2. Description of the Related Art A receiving antenna for satellite broadcasting or the like is, for example,
As shown in Fig. 4, a radio wave such as a satellite broadcast is
The reflected wave is received by a feed phone 32 provided at a focal position, is down-converted by an LNB 33, and is transmitted to a satellite broadcast receiver or the like. The feed phone 32 and the LNB 33 are, for example, integrally formed with a casing by aluminum die-casting or the like, and the feed phone integrated LNB is attached to the distal end of an arm 34 made of synthetic resin with a screw 35 or the like.
Screw the other end of 34 to the mounting fixture 36 on the back of the parabolic reflector 31
The fixture 36 is attached to the pole 38.

[0003]

As a method for reducing the size and cost of the antenna, it is an effective means to integrate the LNB housing with the arm. However, since the arm is generally made of a synthetic resin material for mass production, weight reduction, etc., how to integrate the feed phone and the arm, and how to connect the ground (ground) between the feed phone and the LNB. There is a problem of whether to share (connect). In the LNB, an MMIC in which an RF amplification circuit, a frequency conversion circuit, and an IF amplification circuit are configured as a monolithic IC to be modularized and sealed in a metal case.
While there is a (monolithic microwave integrated circuit) format, is itself a problem that How do you ground connection because it is enclosed in a metal case. In view of such a point, the present invention attaches the feed phone and the LNB to the distal end of the arm, respectively, and
B is connected to the case B to form a feedphone-integrated LNB including an arm, which facilitates downsizing and cost reduction.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, a feedphone is mounted on the side of the parabolic reflector at the distal end of an arm formed of a synthetic resin material provided so as to protrude forward of the parabolic reflector. A feedphone integrated type LNB device is provided in which a feedphone is mounted on a feedphone mounting portion, an LNB is mounted on the other side, and a feedphone and a housing of the LNB are connected by a conductive member. is there.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a feed phone integrated type LNB device according to the present invention, a feed phone mounting portion is formed on a parabolic reflector side of a distal end of an arm formed of a synthetic resin material, and a metal plate is formed by pressing or the like. A feed phone is attached, an LNB is attached to the other side of the arm, holes are provided for inserting screws and the like at the bottom of the feed phone and corresponding positions of the feed phone attachment portion, and the feed phone and the LNB housing are armed. Is screwed in between, and the feed phone and the LNB housing are conducted. Alternatively, a protrusion is formed in the bottom plate of the LNB housing, holes are formed in the feed phone mounting portion and the bottom of the feed phone, and the LNB is mounted by inserting the protrusion, and the tip of the protrusion is bent outward. Then, it is brought into contact with the bottom of the feed phone by crimping or the like. Alternatively, a protrusion is formed on the bottom of the feed phone, a metal plate is mounted on the other side of the arm, holes are formed in the feed phone mounting portion and the metal plate, the feed phone is mounted by inserting the protrusion, and the protrusion is formed. Is bent outward and brought into contact with the metal plate by crimping, etc.
Attach B to the metal plate.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a feedphone integrated type LNB according to the present invention; FIG.
1 is an embodiment of a feed phone integrated type LNB device according to the present invention, in which (a) is a sectional view of a main part, and (b) is a rear view of a main part. In the drawing, reference numeral 1 denotes an arm, which is formed with a feed phone mounting portion 2 at the tip and the other end is fixed to a mounting tool or the like on the back of the parabolic reflector. Reference numeral 3 denotes a feed phone, which is formed of a metal having a required thickness, and has a through hole for a screw 6 and a through hole for a pickup 7 at the bottom. Reference numeral 4 denotes an LNB provided with fixing flanges 5 on both sides of the housing. The signal down-converted by the LNB 4 is transmitted by a coaxial cable or the like connected to the connection unit 9.

[0007] The feed phone 3 needs the conductivity necessary to conduct the current of the received radio wave. However, since the frequency of the signal is high, the signal current gathers on the surface of the metal due to the skin effect, and the current inside the metal. Since the density is reduced, it is unnecessary to conduct the signal current even if the metal is made thicker than necessary.
For example, if the signal frequency is 10GHz and soft copper is used,
If the thickness is several tens μm, there is no practical problem. For this purpose, a soft copper plate or a soft copper foil having a thickness of several tens of μm is formed by pressing or the like. Alternatively, the inner shape of the feed phone mounting portion 2 may be formed into a shape required for a feed phone, and metal may be plated to the above-described thickness. When a hole for inserting a screw is formed in the bottom of the feed phone 3 and the feed phone mounting portion 2, a screw 6 is inserted and fastened to a screw hole of the collar 5 of the LNB 4, and conduction between the feed phone 3 and the LNB 4 is obtained. At the same time, both are fixed to the arm 1. In order to achieve sufficient conduction, a plurality of screws (four in the figure) are used. Further, the screw 6 may be a flat head screw, and the screw insertion holes of the feed phone 3 and the feed phone mounting portion 2 may be recessed in a conical shape so that the head of the screw does not protrude from the surface of the feed phone 3. Alternatively, the feed phone 3 and the LNB 4 may be attached using metal rivets. In addition,
In the figure, the pickup antenna 7 is shown as a helical type for receiving a circularly polarized signal, but a linearly polarized signal for receiving a signal is used whose tip is bent in an L-shape.

FIG. 2 shows an integrated feedphone type L according to the present invention.
In another embodiment of the NB device, (a) is a sectional view of a main part, (b)
FIG. 4 is a rear view of a main part of the LNB. In the figure, reference numeral 11 denotes an arm, which forms a feed phone mounting portion 12 at the distal end, and fixes the other end to a mounting tool or the like on the back of the parabolic reflector. Reference numeral 13 denotes a feed phone, which is formed of a metal having a required thickness. 14 is LNB
A fixing flange 15 is provided on both sides of the bottom plate of the housing, a cylindrical protrusion 17 is formed at the center, and a protrusion is formed at the bottom of the feed phone 13 and at a corresponding position of the feed phone mounting portion 12.
Drill a hole for inserting 17.

The feed phone 13 is formed in the same manner as the feed phone 3 described above. The projection 17 formed on the bottom plate of the housing of the LNB 14 is inserted into the hole at the bottom of the feed phone mounting portion 12 and the feed phone 13, and the tip 18 of the projection 17 is bent outward and caulked, and the It is crimped to the bottom surface for conduction. The pickup antenna 7 is passed through the hollow of the protrusion 17.
In the LNB 14, the flanges 15 on both sides of the housing are fixed to the arm 11 with screws 16 or the like. Although not shown in the figure, the arm
A nut may be inserted into the screwed portion 11 and the screw 16 may be fastened to the nut. Also the protrusion
The caulking portion 17 is soldered or welded to the bottom surface of the feed phone 13 so that the feed phone 13 and the housing of the LNB 14 are reliably connected.

FIG. 3 shows a feedphone integrated type L according to the present invention.
In another embodiment of the NB device, FIG.
(B) is a rear view of a main part of the LNB. In the figure, reference numeral 21 denotes an arm, which forms a feed phone mounting portion 22 at the distal end, and fixes the other end to a mounting tool or the like on the back of the parabolic reflector. Reference numeral 23 denotes a feed phone, which is formed of a metal having a required thickness and has a cylindrical projection 28 at the bottom. Reference numeral 24 denotes an LNB, and fixing flanges 26 are provided on both sides of the housing. Reference numeral 25 denotes a metal plate, which is provided with a hole for inserting the protrusion 28 and a screw hole for attaching the LNB 24 with the screw 27.

The feed phone 23 is provided at the tip of a projection 28 at the bottom.
Since it is a structure in which 29 is bent and pressed against the metal plate 25, it is difficult to form it with a thin metal plate or metal plating on a resin surface as shown in FIGS. And the like. Insert the projection 28 of the feedphone 23 through the hole formed in the feedphone mounting portion 22 and the metal plate 25,
The tip portion 29 is bent outward and crimped, and is pressed against the metal plate 25. The swaged portion may be soldered or welded to the metal plate 25 to ensure conduction. Then, the flanges 26 on both sides of the housing of the LNB 24 are screwed to the metal plate 25 with screws 27,
The continuity between the feed phone 23 and the housing of the LNB 24 is established. Also, the swaged part of the tip part 29 is inflated, and LNB24 is a metal plate.
A metal spacer may be inserted in the gap between the LNB 24 and the metal plate 25 in order to prevent the conduction from being lifted up from the plate 25 and becoming insufficient. In this case, the screw hole of the metal plate 25 is a hole without a screw groove, a long screw 27 is used, and the screw 27 is passed through the hole of the collar 26 and the metal plate 25 and fastened to the arm 21. A nut may be inserted into the arm 21 to secure the tightening, and the screw 27 may be tightened to the nut. Also, a feed phone 23 is provided on the bottom plate of the LNB 24 housing.
A hole having a size of caulking at the distal end portion 29 may be formed so that the housing and the metal plate 25 come into close contact with each other by attaching the LNB 24. In this case, a spacer between the LNB 24 and the metal plate 25 is unnecessary.

With the configuration described above, for example, it is easy to mount the MMIC-type LNB enclosed in the metal case, and it is easy to reduce the size of the feedphone and the LNB.

[0013]

As described above, according to the feedphone-integrated LNB device according to the present invention, the feedphone and the LNB are mounted on both sides of the arm, and the feedphone and the LN are mounted.
Since the feed phone and the LNB are integrated with the arm by conducting (commonizing) the case B by screwing or caulking, the use of the MMIC-type LNB is facilitated and the size can be reduced. Further, the cost can be reduced since aluminum die casting or the like is not used.

[Brief description of the drawings]

FIG. 1 is an embodiment of a feedphone-integrated LNB device according to the present invention, in which (a) is a sectional side view of a main part, and (b) is a rear view of the main part.

FIGS. 2A and 2B show another embodiment of a feedphone-integrated LNB device according to the present invention, wherein FIG.
It is a principal part rear view.

FIG. 3 is another embodiment of a feedphone integrated LNB device according to the present invention, wherein (a) is a sectional side view of a main part, and (b) is an LNB.
It is a principal part rear view.

FIG. 4 is an example of an antenna to which a conventional feedphone-integrated LNB is attached.

[Explanation of symbols]

 1, 11, 21 arm 2, 12, 22 feed phone mounting part 3, 13, 23 feed phone 4, 14, 24 LNB 5, 15, 26 brim 6, 16, 27 screw (or rivet) 7 pickup antenna 8 pickup antenna 9 Connection part 17, 28 Projection part 18, 29 Bend part 25 Metal plate

Claims (15)

[Claims] 1. A feed phone comprising a feed phone formed on a parabolic reflector side of a distal end of an arm formed of a synthetic resin material provided so as to protrude forward of a parabolic reflector, and an LNB attached to the other side. Body type LNB device. 2. A feed phone mounting portion is formed on the parabolic reflector side of the distal end of the arm, a feed phone is mounted on the feed phone mounting portion, and an LNB is mounted on the other side.
The feedphone-integrated LNB device according to claim 1, wherein the feedphone and the housing of the LNB are connected by a conductive member. 3. The feed phone mounting portion is formed into a shape corresponding to the outer shape of the feed phone, and a hole for inserting a screw or the like is formed in a bottom portion of the feed phone and a corresponding position of the feed phone mounting portion. The feedphone and the LNB housing are screwed together with the arm in between, and the feedphone and the LNB are
The feed-phone integrated LNB device according to claim 2, wherein the LNB device is electrically connected to the housing. 4. The feed phone is formed such that a screw insertion hole of the feed phone is conically recessed, and a corresponding portion of the feed phone mounting portion is formed corresponding to the outer shape of the feed phone. 4. The integrated feedphone-type LNB device according to claim 3, wherein the housing of the LNB and the arm of the LNB are screwed with the arm interposed therebetween. 5. The feed phone and the LNB case are riveted to each other by inserting a rivet into the screw insertion hole, and an arm is interposed between the rivet and the feed phone and the LNB case to conduct the feed phone and the LNB case. LN with integrated feedphone
B device. 6. A projection is formed on a bottom plate of the housing of the LNB, a hole is provided for inserting the projection into the feed phone mounting portion and the feed phone, and the feed phone is mounted on the feed phone mounting portion. 3. The method according to claim 2, further comprising: inserting the LNB protruding portion into the insertion hole, bending the tip of the protruding portion outward, and crimping the protruding portion to the bottom of the feed phone, thereby electrically connecting the feed phone to the housing of the LNB. The feedphone-integrated LNB device described in the above. 7. The feedphone integrated LNB according to claim 6, wherein the housing of the LNB is screwed to an arm.
apparatus. 8. The feedphone integrated type LNB device according to claim 7, wherein a nut is inserted into said arm, and said LNB housing is screwed to said nut for mounting. 9. A projection for molding the projection on the bottom of the feed phone, a hole for inserting the projection on the feed phone mounting portion, and a hole for inserting the projection on the other side of the arm. A metal plate with a hole is attached, the projection of the feed phone is inserted through the feed phone mounting portion and the insertion hole of the metal plate, and the tip of the projection is bent outward and pressed against the metal plate, thereby fixing the LNB. 3. The feed-phone-integrated LNB device according to claim 2, wherein the feed phone and the LNB housing are electrically connected to each other by screwing or the like to a metal plate. 10. A spacer made of a conductive material and having a thickness greater than the height of the bent portion at the tip of the projection is interposed between the metal plate and the LNB, and the LNB is screwed to the arm with the spacer and the metal plate interposed therebetween. The feedphone-integrated LNB device according to claim 9. 11. A hole having a size corresponding to a bent portion at the tip of the protruding portion is formed in a bottom plate of the housing of the LNB so that the LNB and the metal plate are in close contact with each other. 9. The feedphone integrated LNB device according to 9. 12. The feedphone-integrated LNB device according to claim 6, wherein said bent portion is soldered to a metal plate. 13. The feed phone integrated type LNB device according to claim 6, wherein the bent portion is welded to a metal plate. 14. The feed phone integrated type according to claim 2, wherein said feed phone is formed by molding a metal plate having a thickness necessary for conducting current by a received radio wave by a press or the like. LNB equipment. 15. The feed phone according to claim 2, wherein the feed phone is formed by plating a metal on a surface of a feed phone mounting portion or a resin molded in a shape of the feed phone to a thickness necessary for conducting current by a received radio wave. 9. The feed-phone-integrated LNB device according to any one of 8.