JP2007129313A - Frequency converter for receiving satellite broadcasting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent deterioration in isolation by eliminating the crossing of a line for guiding a signal to a switch circuit in a wideband LNB circuit layout, and to suppress spurious noise generated by the mutual interference of frequency conversion blocks. <P>SOLUTION: There are first and second switch circuits 118, 128, and third-sixth frequency conversion circuits 224 225, 324, 325 on a second circuit board surface 22 that is the same substrate surface. The first and second switch circuits 118, 128 are arranged opposingly so as to sandwich a segment L1 connecting first and second lead positions 310, 311. The first switch circuit 118 is oriented so that first and second input terminals 118a, 118b approach the segment L1. The second switch circuit 128 is oriented so that third and fourth input terminals 128a, 128b approach the segment L1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a circuit layout on a circuit board in a satellite broadcast receiving frequency converter capable of outputting a plurality of signals on a single output cable.

  Conventionally, there is a demand to connect four BS receivers (for example, two BS receivers with two tuners) to one satellite broadcast receiving frequency converter (LNB: low noise block converter), and four output terminals are provided. There were 4 output LNBs with. However, the 4-output LNB requires four cables between the BS receiver and the economic burden is large. Thus, an LNB that outputs four signals on one cable has been proposed (see, for example, Patent Document 1).

  FIG. 6 is a diagram illustrating a configuration example of an LNB that outputs four signals placed on one cable. A plurality of first broadcast signals (for example, horizontal polarization signal H) and a plurality of second broadcast signals (for example, vertical polarization signal V) transmitted from the satellite are received and input to the LNB. A horizontal polarization signal H is input to one low noise amplifier 211 of the LNB, and a vertical polarization signal V is input to the other low noise amplifier 311. The horizontally polarized signal H output from one low noise amplifier 211 is branched by the distributor 212 for low band and high band, and the vertically polarized signal V output from the other low noise amplifier 311 is also distributed by the distributor 312. Branches for low band and high band. Low-band (for example, 10.7 GHz to 11.7 GHz) is taken out of the branched low-band horizontal polarization signal H and vertical polarization signal V by band-pass filters 213 and 214. Further, the high-band (for example, 11.7 GHz to 12.75 GHz) of the branched high-band horizontal polarization signal H and vertical polarization signal V is extracted by the band-pass filters 313 and 314. The horizontal polarization signal H and the vertical polarization signal V on the low band side (10.7 GHz to 11.7 GHz) are frequency-converted to, for example, 0.95 GHz to 1.95 GHz by the mixers 215 and 216, and the high band side (11. The horizontal polarization signal H and the vertical polarization signal V of 7 GHz to 12.75 GHz are frequency-converted by the mixers 315 and 316 to, for example, 1.10 GHz to 2.15 GHz. An oscillator 217 is provided for the low-band side mixers 215 and 216, and an oscillator 317 is provided for the high-band side mixers 315 and 316. The horizontally polarized wave signal H and the vertically polarized wave signal V frequency-converted to a frequency range of 0.95 GHz to 1.95 GHz are amplified by the amplifiers 218 and 219 and then branched again by the distributors 221 and 222. The horizontally polarized signal H and the vertically polarized signal V that have been frequency-converted to a frequency range of 1.10 GHz to 2.15 GHz are also amplified by the amplifiers 318 and 319 and then branched again by the distributors 321 and 322. Then, four signals output from the four distributors 221, 222, 321, and 322 are input to the two switch circuits 223 and 323, respectively. That is, the low-band and high-band signals of the horizontal polarization signal H and the low-band and high-band signals of the vertical polarization signal V are input to the switch circuits 223 and 323, respectively. One switch circuit 223 selects two signals and outputs them in parallel to frequency conversion blocks (hereinafter referred to as “FCB”) 224 and 225, and the other switch circuit 323 also selects two signals and selects each FCB 324 and 325. Output in parallel. Each of the FCBs 224, 225, 324, and 325 has a horizontal polarization signal H and a vertical polarization signal V each having a specific fixed frequency (for example, FCB 224) from a frequency band of 0.95 GHz to 1.95 GHz or 1.10 GHz to 2.15 GHz. Is 1.4 GHz, FCB225 is 1.526 GHz, FCB324 is 1.632 GHz, and FCB325 is 1.748 GHz. The signals converted to fixed frequencies by the FCBs 224, 225, 324, and 325 are subjected to unnecessary frequency components being cut by the corresponding bandpass filters 227, 228, 327, and 328, and then combined by the power combiner 229, and the amplifier 230 is To the cable connected to the output port.

  However, since the LNB shown in FIG. 6 converts the RF signal into two IF signals of 0.95 GHz to 1.95 GHz and 1.10 GHz to 2.15 GHz, the distributors 212 and 312 switch the switch circuits 223 and 323. 2 oscillators 217, 317, 4 mixers 215, 216, 315, 316 and the like are required, resulting in an increase in the number of parts, which is disadvantageous in terms of cost and space. It was.

  Therefore, the number of components is reduced by directly converting the RF signals (10.7 GHz to 11.7 GHz and 11.7 GHz to 12.75 GHz) into one IF signal (for example, 0.5 GHz to 2.55 GHz). It is possible.

  FIG. 3 is a diagram showing a configuration example of an LNB that directly converts an RF signal into one IF signal. A horizontal polarization signal H is input to one low noise amplifier 111 of the LNB, and a vertical polarization signal V is input to the other low noise amplifier 121. The horizontal polarization signal H output from one low noise amplifier 111 is extracted from the desired band (for example, 10.7 GHz to 12.75 GHz) by the band pass filter 112 and the vertical polarization signal output from the other low noise amplifier 121 is extracted. A desired band (for example, 10.7 GHz to 12.75 GHz) is extracted from the wave signal V by the band pass filter 122. The RF signal (10.7 GHz to 12.75 GHz) of the horizontally polarized signal H extracted by one band pass filter 112 is frequency-converted by a mixer 113 serving as a first frequency conversion block to be a first channel. It converts into IF signal (for example, 0.5GHz-2.55GHz) as a signal group. Further, the RF signal (10.7 GHz to 12.75 GHz) of the vertical polarization signal V extracted by the other bandpass filter 122 is frequency-converted by the mixer 123 serving as the second frequency conversion block, and the same intermediate position. The signal is converted into an IF signal (0.5 GHz to 2.55 GHz) as a second channel signal group in the frequency band. The oscillation frequency (for example, 10.2 GHz) supplied to the mixers 113 and 123 is due to one oscillator 114. The oscillation signal output from the oscillator 114 is input to both the mixers 113 and 123 via the amplifier 115. The amplifier 115 is not necessary depending on the output level of the oscillator. The IF signals output from the mixers 113 and 123 are input to the distributors 117 and 127 via the amplifiers 116 and 126, branched there, and input to the first and second switch circuits 118 and 128. Each of the switch circuits 118 and 128 receives two IF signals of the horizontal polarization signal H and the vertical polarization signal V, and FCBs 224 and 225 serving as the third to sixth frequency conversion blocks corresponding to the two IF signals. , 324, 325. The configuration subsequent to the switch circuits 118 and 128 is the same as that of the LNB shown in FIG. Thus, the number of oscillators and mixers can be reduced by directly converting the RF signal into one IF signal. Hereinafter, as in the LNB shown in FIG. 3, a wideband (10.7 GHz to 11.7 GHz / 11.7 GHz to 12.75 GHz) television signal is directly converted into a narrowband (0.5 GHz to 2.55 GHz) signal. For convenience, the LNB is referred to as a wideband LNB.

  4A and 4B are plan views showing an example of a wideband LNB circuit layout having the circuit configuration shown in FIG. 3, which is laid out in accordance with a conventional LNB circuit layout method. As shown in FIG. 4A, circuit elements and lines from the input ports 201 and 202 of the horizontal and vertical polarization signals H and V to the intermediate frequency amplifiers 116 and 126 are arranged on one circuit board surface of the circuit board 200. As shown in FIG. 4B, the DC / DC block 108 and the microcomputer block 109 for supplying power are arranged on the other circuit board surface of the circuit board 200 in a substantially half space on the input ports 201 and 202 side. ing. On one circuit board surface shown in FIG. 4A, a switch circuit 118 for selecting a signal branched from the distributors 117 and 127 not shown in the figure, and a circuit extending from the switch circuit 118 to the bandpass filters 227 and 228 Elements are arranged. Further, on the other circuit board surface shown in FIG. 4B, a switch circuit 128 for selecting a signal branched from the distributors 117 and 127 not shown in the figure through the through holes 103 and 104 in the remaining space, and Circuit elements from the switch circuit 128 to the bandpass filters 327 and 328, an amplifier 230 immediately before the cable, and an impedance matching circuit 231 (not shown) are arranged.

Here, although the number of parts of the wideband LNB is reduced, parts such as FCBs 224, 225, 324, and 325 are added compared to the 4-output LNB having four output terminals. It is necessary to expand the circuit board size by the shaded area R1 shown in FIG. 4 with respect to the circuit board.
US Patent Application Publication No. 2003/0141949

  However, if the circuit layout of the wideband LNB does not fit in the circuit board size of the 4 output LNB, the mold for the circuit board of the 4 output LNB that has been used so far cannot be used. It is necessary to remanufacture a metal mold exclusively for the circuit board of the band LNB, which increases the cost. Therefore, it is necessary to devise a circuit layout so that the circuit elements of the wide band LNB can be accommodated in the circuit board size of the 4-output LNB.

  For example, as shown in FIGS. 5A and 5B, the input ports 201 and 202 to the intermediate frequency amplifiers 116 and 126 are arranged on one circuit board surface 301 of the circuit board 300, and the switch circuit 118, FCBs 224 and 225 are arranged. Then, the band-pass filters 227 and 228 and the oscillator 226 are moved to the other circuit board surface 302, and the DC / DC block 108 is moved from the other circuit board surface 302 to an empty space on the other circuit board surface 301. Since the DC / DC block 108 occupies a smaller space than the switch circuit 118, the FCBs 224, 225, etc., all of the DC / DC blocks 108 can be accommodated in the same size as the circuit board of the 4-output LNB on one circuit board surface 301.

  Further, a space for the DC / DC block 108 is vacant on the other circuit board surface 302. In the empty space, a switch circuit 128 and a circuit element group through which a signal output from the switch circuit 128 passes are arranged in the right half of the empty space, and output from the switch circuit 118 and the switch circuit 118. A circuit element group through which signals pass is arranged in the left half of the empty space. Signals are supplied to the switch circuit 118 and the switch circuit 128 from a pair of through holes 310 and 311 formed near both sides of the center portion of the circuit board 300. Since these circuit elements use the empty space of the DC / DC block 108, it is possible to arrange them as a whole upward, and the other circuit board surface 302 is also accommodated in the same size as the circuit board of the 4-output LNB. Can be placed.

  However, the circuit layout shown in FIG. 5 has the following problems. That is, on the other circuit board surface 302, a line 312 for guiding a signal from one through hole 310 provided in the vicinity of the left end of the central part of the circuit board to the switch circuit 128 disposed in the right half area and provided in the vicinity of the right end of the central part of the board. Since the line 313 that guides a signal from the other through hole 311 to the switch circuit 118 arranged in the left half region intersects at the position P1, there is a problem that the isolation is deteriorated at the intersection P1.

  In addition, since the four FCBs 224, 225, 324, and 325 are arranged in a straight line in the horizontal direction on the circuit board surface 302, adjacent FCBs cannot be sufficiently separated from each other, and spurious due to interference between FCBs occurs. There is a problem that it is easy to do.

  The present invention has been made in view of the above points, and can solve the deterioration of isolation caused by the crossing of the lines that guide signals to a plurality of switch circuits, and can suppress the occurrence of spurious due to interference between FCBs. Moreover, an object of the present invention is to provide a satellite broadcast receiving frequency converter capable of realizing a circuit layout that can be accommodated in an existing circuit board size.

  The satellite broadcast receiving frequency converter of the present invention includes a first frequency conversion block for group-converting a first broadcast channel signal received from a satellite to obtain a first channel signal group, and a second frequency received from the satellite. A second frequency conversion block for group-converting broadcast channel signals to obtain a second channel signal group; and first and second input terminals to which the first channel signal group and the second channel signal group are input. And a first switch circuit having first and second output terminals that respectively output one of the selected channel signal groups, and a third switch circuit that receives the first channel signal group and the second channel signal group. And a second switch circuit having third and fourth output terminals each having a fourth input terminal and outputting one selected channel signal group, and Third to sixth frequency conversion blocks provided corresponding to the first to fourth output terminals of the two switch circuits, respectively, for converting channel group signals input from the corresponding output terminals into predetermined fixed frequencies, respectively. The first and second switch circuits, and the third to sixth frequency conversion blocks are configured on the same substrate surface, and the first and second switch circuits are configured with the first and second switch circuits. The channel signal group is arranged to face each other so as to sandwich a line segment connecting the first and second derivation positions for deriving the channel signal group to the substrate surface, respectively, and the first switch circuit has the first and second input terminals as the first input terminals. The second switch circuit is arranged so that the third and fourth input terminals are closer to the line segment than the third and fourth output terminals. It is characterized by its orientation.

  According to this configuration, the first and second switch circuits are opposed so as to sandwich the line segment connecting the first and second derivation positions for deriving the first and second channel signal groups to the substrate surface, respectively. Since they are arranged, the directions of the first and second switch circuits can be set so that the lines do not cross each other, and deterioration of isolation due to the crossing of the lines can be prevented. Also, the third to sixth frequency conversion blocks can be arranged at the four vertices of the quadrangle centered on the first and second switch circuits, and adjacent frequencies compared to the layout in which the four frequency conversion blocks are arranged in a straight line. Spacing between transform blocks can be widened, and occurrence of spurious due to interference between frequency transform blocks can be suppressed.

  According to the present invention, in the satellite broadcast receiving frequency converter, the third and fourth frequency conversion blocks include a first switch circuit for a line segment connecting the first and second derivation positions. The fifth and sixth frequency conversion blocks are arranged on the same side with the first switch circuit as the center, and the fifth and sixth frequency conversion blocks are connected to the line segment connecting the first and second derivation positions. The second switch circuit is distributed and arranged on the same side as the switch circuit.

  With this configuration, the third to sixth frequency conversion blocks corresponding to the first to fourth output terminals can be arranged radially with the first and second switch circuits as the center, and the third to sixth frequency conversion blocks are arranged. Can be effectively widened.

  According to the present invention, in the satellite broadcast receiving frequency converter, the first and second frequency conversion blocks include the first and second switch circuits and the third to sixth frequency conversion blocks. The substrate surface is different from the substrate surface.

  With this configuration, the first and second frequency conversion blocks are disposed on one substrate surface, and the first and second switch circuits and the third to sixth frequency conversion blocks are disposed on the other substrate surface. Therefore, each circuit element constituting the satellite broadcast receiving frequency converter can be efficiently arranged on both sides of the same size as the existing circuit board.

  According to the present invention, it is possible to solve the degradation of isolation caused by crossing lines for guiding signals to a plurality of switch circuits, to suppress the occurrence of spurious due to interference between frequency conversion blocks, and to the existing circuit board size. A circuit layout that can be accommodated can be realized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIGS. 1A and 1B are plan views showing circuit layouts on the first circuit board surface and the second circuit board surface in the wideband LNB according to the present embodiment. Note that the wideband LNB according to the present embodiment has the same configuration as the wideband LNB shown in FIG. 3 described above, and the circuit layout is different.

  1A shows a circuit layout of the first circuit board surface 21 in the present embodiment, and FIG. 1B shows a circuit layout of the second circuit board surface 22. The circuit layout of the first circuit board surface 21, which is one surface of the circuit board 10, has the same configuration as that shown in FIG. That is, on the first circuit board surface 21, circuit elements and lines from the input ports 11 and 12 to which the horizontal polarization signal H and the vertical polarization signal V are input to the intermediate frequency amplifiers 116 and 126 are arranged, and the DC circuit is disposed below the circuit elements and lines. / DC block 108 is arranged. Further, a through hole 312 is provided in the space next to the DC / DC block 108 on the first circuit board surface 21, and is led from the second circuit board surface 22 to the first circuit board surface 21 side through the through hole 312. A signal is input to the output port 107.

  FIG. 1B is a diagram showing a circuit layout of the second circuit board surface 22 which is the other surface of the circuit board 10. The individual circuit elements arranged on the second circuit board surface 22 are the same as the circuit layout shown in FIG.

  In the present embodiment, circuit elements are symmetrically arranged above and below a line segment passing through the through holes 310 and 311 as signal derivation positions provided on both sides of the substantially central portion of the second circuit board surface 22. ing. A first switch circuit 118 is arranged at the center of the circuit board surface 22 above the line segment passing through the through holes 310 and 311 as the lead-out position. In the first switch circuit 118, the left side surface on which the first input terminal 118a and the first output terminal 118c are provided is directed toward the through hole 310 side that guides the horizontally polarized signal H from the first circuit board surface 21. Yes. The switch circuit 118 has the right side surface on which the second input terminal 118b and the second output terminal 118d are provided facing the through hole 311 side that guides the vertical polarization signal V from the first circuit board surface 21. . The first input terminal 118a and the second input terminal 118b are provided closer to the center than the first output terminal 118c and the second output terminal 118d.

  On the other hand, the second switch circuit 128 is arranged at the center of the circuit board surface 22 below the line passing through the through holes 310 and 311 as signal derivation positions. In the second switch circuit 128, the left side surface on which the third input terminal 128 a and the third output terminal 128 c are provided is directed toward the through hole 310 that guides the horizontal polarization signal H from the first circuit board surface 21. Yes. The second switch circuit 128 has the right side surface on which the fourth input terminal 128b and the fourth output terminal 128d are provided on the through hole 311 side for guiding the vertical polarization signal V from the first circuit board surface 21. It is aimed. Note that the third input terminal 128a and the fourth input terminal 128b are provided closer to the center than the third output terminal 128c and the fourth output terminal 128d.

  As described above, the first and second switch circuits 118 and 128 are arranged across the line segment passing through the through holes 310 and 311, and the first and third input terminals 118 a to which the horizontal polarization signal H is input. The second and fourth input terminals 118b to which the vertical polarization signal V is input, while the left side surfaces of the switch circuits 118 and 128 provided with 128a are directed to the through hole 310 side that guides the horizontal polarization signal H. The right side surfaces of the switch circuits 118 and 128 provided with 128b are arranged toward the through hole 311 that guides the vertically polarized signal V. As a result, the crossing of the lines as shown in FIG. 5B can be eliminated, and the problem of degradation of isolation can be solved.

  FIG. 2A is a diagram showing a positional relationship between the first and second switch circuits 118 and 128 and the four FCBs 227, 228, 324, and 325 as the third to sixth frequency conversion blocks. The four FCBs 227, 228, 324, and 325 have a higher effect of suppressing the occurrence of spurious as the distance from each other increases. In the present embodiment, four FCBs 227, 228, 324, and 325 are arranged at four vertices of a square centering on the first and second switch circuits 118 and 128, respectively. That is, the FCB 224 that receives the signal output from the first output terminal 118c of the first switch circuit 118 disposed on the upper side of the line segment L1 is disposed at the upper left vertex of the switch circuit 118, and the first switch circuit The FCB 225 that receives the signal output from the second output terminal 118 d of 118 is arranged at the upper right vertex of the switch circuit 118. The FCB 324 that receives the signal output from the third output terminal 128c of the second switch circuit 128 disposed below the line segment L1 is disposed at the lower left vertex of the switch circuit 128, and the second switch The FCB 325 that receives the signal output from the fourth output terminal 128 d of the circuit 128 is disposed at the lower right vertex of the switch circuit 128. If the vertexes where the four FCBs 227, 228, 324, and 325 are arranged are square, the distances between the FCBs adjacent in the vertical direction and the horizontal direction are equal to each other, but they are separated to the extent that spurious can be sufficiently suppressed. If it is, it does not necessarily need to be equidistant.

  FIG. 2B is a diagram showing the positional relationship between the first and second switch circuits 118 and 128 and the four FCBs 227, 228, 324, and 325 in the circuit layout shown in FIG. 5B. As is clear from the circuit layout in the present embodiment (FIG. 2A), in the circuit layout shown in FIG. 2B, four FCBs are included in the lateral distance W1 on the circuit board surface. In contrast to this, in the present embodiment, two FCBs may be arranged within the distance W1. Therefore, according to the present embodiment, the interval between the FCBs (224, 225) (324, 325) adjacent in the horizontal direction on the second circuit board surface 22 is doubled compared to the circuit layout shown in FIG. It can be widened to a certain extent, and interference between FCBs (224, 225) and (324, 325) adjacent in the horizontal direction is eliminated, and spurious generation can be prevented. Further, the FCBs (224, 324) (225, 325) adjacent in the vertical direction on the second circuit board surface 22 are separated from each other by approximately the same distance as the horizontal direction across the line segment L1, and therefore adjacent in the vertical direction. Interference between FCBs can be prevented, and spurious generation can be sufficiently suppressed.

  In this way, the first switch circuit 118 and the FCBs 224 and 225 that receive signals from the switch circuit 118 across the line segment L1 connecting the through holes 310 and 311 as signal derivation positions, the second switch circuit 128, and the Since the FCBs 324 and 325 that receive signals from the switch circuit 128 are arranged symmetrically, the four FCBs 227, 228, 324, and 325 can be arranged apart from each other so that they do not interfere with each other, and spurious generation can be sufficiently suppressed.

  Bandpass filters 227 and 228 are arranged in a space above FCBs 224 and 225 arranged above line segment L1 connecting through holes 310 and 311 as signal derivation positions. In addition, bandpass filters 327 and 328 are disposed in a space below FCBs 324 and 325 disposed below line segment L1 connecting through holes 310 and 311.

  As described above, according to the present embodiment, the first and second switch circuits 118 and 128 sandwich the line segment L1 passing through the through holes 310 and 311 serving as signal deriving positions at the center of the second circuit board surface 22. Since the first switch circuit 118 and the FCBs 224 and 225 and the second switch circuit 128 and the FCBs 324 and 325 are arranged symmetrically, the input terminals 118a of the switch circuits 118 and 128 from the through holes 310 and 311 are arranged. , 118b, 128a, and 128b, the deterioration of isolation can be prevented and spurious due to interference between FCBs 227, 228, 324, and 325 can be sufficiently suppressed.

  The present invention is applicable to a low-noise block converter that outputs a plurality of signals selected from received broadcast signals superimposed on one cable.

(A) The top view of the 1st circuit board surface of the wideband LNB which concerns on this Embodiment, (b) The top view of the 2nd circuit board surface of the wideband LNB which concerns on this Embodiment (A) Partial enlarged view in which a part of the second circuit board surface in FIG. 1 (b) is extracted, (b) Partial enlarged view in which a part of the circuit board surface in FIG. 5 (b) is extracted. Wideband LNB circuit configuration diagram The figure which shows the circuit layout of the wideband LNB shown in FIG. The figure which shows the other circuit layout of the wideband LNB shown in FIG. Circuit diagram of conventional LNB

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Circuit board 21 1st circuit board surface 22 2nd circuit board surface 107 Output port 108 DC / DC block 109 Microcomputer block 111,121 Low noise amplifier 112,122 Band pass filter 113,123 Mixer 114 Oscillator 115 Amplifier 116,126 Intermediate frequency amplifier 117, 127 Distributor 118 First switch circuit 118a First input terminal 118b Second input terminal 118c First output terminal 118d Second output terminal 128 Second switch circuit 128a Third input terminal 128b Fourth input terminal 128c Third output terminal 128d Fourth output terminal 201, 202 Input port 224, 225, 324, 325 Frequency conversion block (FCB)
227, 228, 327, 328 Band pass filter 229 Power combiner 310, 311, 312 Through hole

Claims (3)

A first frequency conversion block for group-converting a first broadcast channel signal received from a satellite to obtain a first channel signal group;
A second frequency conversion block for group-converting a second broadcast channel signal received from a satellite to obtain a second channel signal group;
The first channel signal group and the second channel signal group have first and second input terminals to which the first channel signal group and the second channel signal group are input, and first and second output terminals to output one of the selected channel signal groups, respectively. A first switch circuit;
The first and second channel signal groups have third and fourth input terminals to which the first channel signal group and the second channel signal group are input, and third and fourth output terminals that output one of the selected channel signal groups, respectively. A second switch circuit;
Third to sixth channels provided corresponding to the first to fourth output terminals of the first and second switch circuits, respectively, for converting the channel group signals input from the corresponding output terminals into predetermined fixed frequencies, respectively. A frequency conversion block, and
The first and second switch circuits and the third to sixth frequency conversion blocks are configured on the same substrate surface, and the first and second switch circuits are connected to the first and second channel signal groups. The first switch circuit is disposed opposite to the first and second input terminals so as to sandwich the line segment connecting the first and second lead positions leading to the substrate surface. The orientation is such that it is closer to the line segment than the output terminal, and the second switch circuit is oriented so that the third and fourth input terminals are closer to the line segment than the third and fourth output terminals. A frequency converter for receiving satellite broadcasts.   The third and fourth frequency conversion blocks distribute the line segment connecting the first and second derivation positions to the same side as the first switch circuit with the first switch circuit as the center. The fifth and sixth frequency conversion blocks are arranged around the second switch circuit on the same side as the second switch circuit with respect to the line segment connecting the first and second derived positions. 2. The satellite broadcast receiving frequency converter according to claim 1, wherein the frequency converter is arranged in a distributed manner.   The first and second frequency conversion blocks are configured on a substrate surface different from the substrate surface on which the first and second switch circuits and the third to sixth frequency conversion blocks are configured. The frequency converter for satellite broadcast reception according to claim 1 or 2.

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