JP2012065195A - Power combiner and power distributor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power combiner and a power distributor capable of easily adjusting characteristics.SOLUTION: In a power combiner, a cross point between the input port 10a side of a first transmission path 10 and the input port 11a side of a second transmission path 11 is defined as a first corner, and a cross point between the output port 10b side of the first transmission path 10 and the end edge port 11b side of the second transmission path 11 is defined as a second corner. In the first corner, the port connection part of the first transmission path 10 is folded and formed in the direction orthogonal to the plane of a coupling line, and the port connection part of the second transmission path 11 is folded and formed in the direction orthogonal to the plane of the coupling line and opposite to the folding direction of the first transmission path 10. In the second corner, the port connection part of the first transmission path 10 is folded and formed in the direction orthogonal to the plane of a coupling line, and the port connection part of the second transmission path 11 is folded and formed in the direction orthogonal to the plane of the coupling line and opposite to the folding direction of the first transmission path 10. Return loss and isolation are adjusted by adjusting the width of a first metal block 13 disposed in parallel to the first corner.

Description

  Embodiments described herein relate generally to a power combiner and a power distributor used for a broadcast transmitter or the like.

  A broadcast transmitter obtains desired transmission power by combining power output from a plurality of power amplifiers. A synthesizer used for synthesizing electric power needs high power durability, and a high power durability is realized by a structure in which a strip line is arranged in the air.

  However, a combiner used for high power combining may require a return loss or isolation of 30 dB or less. Since the frequency band of the UHF (Ultra High Frequency) band all channels ranges from 470 MHz to 870 MHz, it has been difficult to achieve 30 dB or less in all channels by the conventional method. Therefore, it is necessary to change the structure according to the desired channel, which is a problem.

JP 2010-062906

  As described above, since the frequency band of the UHF band all channel ranges from 470 MHz to 870 MHz, it is difficult to realize 30 dB or less in all channels, and it is necessary to change the structure according to the desired channel. There is a problem that production efficiency is poor.

  An object of the present embodiment is to provide a power combiner and a power distributor whose characteristics can be easily adjusted.

  The first power combiner and the power distributor according to the present embodiment are coupled to a first transmission line having one end as an input port and the other end as an output port, and the first transmission line, and one end as an input. A second transmission line serving as a port, and an intersection between one end of the first transmission path and one end of the second transmission path is defined as a first corner, and the other end of the first transmission path And the other end side of the second transmission line is a second corner, a portion connecting the first transmission line and the second transmission line is a coupling line, and the first corner The port connection portion of the first transmission line is formed to be bent in a direction orthogonal to the plane of the coupling line, and the port connection portion of the second transmission line is formed with respect to the plane of the coupling line in the first corner. The second transmission line is bent in a direction orthogonal to the first transmission path, The port connection portion of the first transmission line is bent in a direction perpendicular to the plane of the coupling line in the second corner, and the port connection portion of the second transmission path is the plane of the coupling line in the second corner. A first metal block that is bent in a direction orthogonal to the first transmission line and arranged in parallel to the first corner, and the width of the first metal block is adjusted. This adjusts return loss and isolation.

  A second power combiner and a power distributor according to the present embodiment include a second transmission line coupled to the first transmission line and having one end as an input port, An intersection between one end side and one end side of the second transmission path is defined as a first corner, and an intersection between the other end side of the first transmission path and the other end side of the second transmission path is defined as a second corner. The portion connecting the first transmission line and the second transmission line is a connection line, and the port connection portion of the first transmission line is orthogonal to the plane of the connection line in the first corner. The port connection portion of the second transmission line is bent in the direction perpendicular to the first transmission line with respect to the plane of the coupling line in the first corner. In the two corners, the port connection portion of the first transmission line is a plane of the coupled line. In the second corner, the port connection portion of the second transmission path is bent in a direction orthogonal to the first transmission path with respect to the plane of the coupling line. A first metal plate formed and disposed parallel to the transmission path on one end side of the first transmission path, and a second metal plate disposed parallel to the transmission path on the other end side of the first transmission path. The return loss and the isolation are adjusted by adjusting the distance between the first transmission line and the first metal plate and the second metal plate.

  The third power combiner and power distributor according to the present embodiment are coupled to a first transmission line having one end as an input port and the other end as an output port, and the first transmission line, and one end being input. A second transmission line serving as a port, and an intersection between one end of the first transmission path and one end of the second transmission path is defined as a first corner, and the other end of the first transmission path And the other end side of the second transmission line is a second corner, a portion connecting the first transmission line and the second transmission line is a coupling line, and the first corner The port connection portion of the first transmission line is formed to be bent in a direction orthogonal to the plane of the coupling line, and the port connection portion of the second transmission line is formed with respect to the plane of the coupling line in the first corner. The second transmission line is bent in a direction orthogonal to the first transmission path, The port connection portion of the first transmission line is bent in a direction perpendicular to the plane of the coupling line in the second corner, and the port connection portion of the second transmission path is the plane of the coupling line in the second corner. A first metal plate that is bent in a direction orthogonal to the first transmission line and arranged in parallel with the transmission line on one end side of the first transmission line, and the first transmission A second metal plate disposed in parallel to the transmission path on the other end side of the path, and adjusting a length of overlap between the first transmission path and the first metal plate and the second metal plate It adjusts return loss and isolation.

  The fourth power combiner and the power distributor according to the present embodiment are coupled to a first transmission line having one end as an input port and the other end as an output port, and the first transmission line, and one end being input. A second transmission line serving as a port, and an intersection between one end of the first transmission path and one end of the second transmission path is defined as a first corner, and the other end of the first transmission path And the other end side of the second transmission line is a second corner, a portion connecting the first transmission line and the second transmission line is a coupling line, and the first corner The port connection portion of the first transmission line is formed to be bent in a direction orthogonal to the plane of the coupling line, and the port connection portion of the second transmission line is formed with respect to the plane of the coupling line in the first corner. The second transmission line is bent in a direction orthogonal to the first transmission path, The port connection portion of the first transmission line is bent in a direction perpendicular to the plane of the coupling line in the second corner, and the port connection portion of the second transmission path is the plane of the coupling line in the second corner. A first metal plate that is bent in a direction orthogonal to the first transmission line and arranged in parallel with the transmission line on one end side of the first transmission line, and the first transmission A second metal plate disposed on the other end side of the path in parallel with the transmission path, and adjusting the return loss and isolation by adjusting the height of the first metal plate and the second metal plate It is.

The figure which shows the structure used as the basis of the electric power combiner | synthesizer which concerns on this embodiment. The figure which shows the characteristic of the electric power combiner of FIG. 1 is a diagram illustrating a configuration of a power combiner according to a first embodiment. The figure which shows the structure of the electric power combiner of Example 2. FIG. FIG. 6 is a diagram illustrating a configuration of a power combiner according to a third embodiment. The figure which shows the structure of the electric power combiner of Example 4. FIG. FIG. 10 is a diagram illustrating a configuration of a power combiner according to a fifth embodiment. FIG. 10 is a diagram illustrating a configuration of a power combiner according to a sixth embodiment. FIG. 10 is a diagram illustrating a configuration of a power combiner according to a seventh embodiment. FIG. 10 is a diagram illustrating a configuration of a power combiner according to an eighth embodiment. The figure which shows the characteristic of the electric power combiner of FIG.

  Hereinafter, a power combiner and a power distributor according to the present embodiment will be described with reference to the drawings. In the following, a synthesizer will be described as an example, but a distributor may be used.

[Basic type]
First, the configuration of the power combiner that is the basis of each embodiment will be described. The basic structure is shown in FIG.

In the box-shaped casing 100, the first transmission path 10 and the second transmission path 11 are arranged in parallel in the vertical direction in order to form a power combiner, and intersect when focusing on the overall shape. It is in a state of being.
The first transmission path 10 and the second transmission path 11 are S-shaped as a single unit, and intersect each other in opposite directions so that they are X-shaped when viewed from above. One end of the first transmission path 10 is provided with an input port 10a for inputting a signal, and the other end is provided with an output port 10b for outputting a synthesized signal. In addition, an input port 11a for inputting a signal is provided at one end of the second transmission line 11, and a termination port 11b for connecting a terminator is provided at the other end. The connection parts 12a and 12b of the first transmission line 10 are bent upward and the connection parts 12c and 12d of the second transmission line 11 are bent downward by 90 degrees. Further, the corners of the connecting portions 12a, 12b, 12c, and 12d are cut, and the return loss and the isolation can be adjusted by this cutting method.

  FIG. 2 is a characteristic diagram showing return loss and isolation in the power combiner of FIG. In FIG. 2, the horizontal axis represents frequency [MHz] and the vertical axis represents gain [dB]. As shown in FIG. 2, with the configuration of FIG. 1, return loss and isolation can be realized to 20 dB or less over a wide band. However, a combiner used for high power combining may require a return loss or isolation of 30 dB or less. Since the frequency band of the UHF band all channel ranges from 470 MHz to 870 MHz, it is difficult to realize 30 dB or less in all channels even using the configuration of FIG. Therefore, it is necessary to change the structure according to the desired channel, and there is a problem that the manufacturing efficiency is poor.

  In order to overcome this problem, the present embodiment proposes a method capable of easily adjusting the characteristics according to a desired channel in the UHF band. Hereinafter, each example of the power combiner according to the present embodiment will be described.

[Example 1]
FIG. 3 shows the configuration of the power combiner according to the first embodiment. FIG. 3 is a view of the power combiner as viewed from above.

  The first embodiment has a structure in which a metal block 13 is added to the basic configuration shown in FIG. The return loss and the isolation are adjusted by changing the distance d1 between the first transmission path 10 and the second transmission path 11 and the metal block 13. The position where the metal block 13 is added is not the output port 10b of the first transmission line 10 and the termination port side 11b of the second transmission line 11, but the input port 10a and the second transmission line of the first transmission line 10. 11 output port sides 11b. Further, the metal block 13 may be a metal plate fixed to the housing 100.

[Example 2]
The power combiner according to the second embodiment will be described with reference to FIG. As in the first embodiment, the second embodiment has a structure in which a metal block 13 is added to the basic configuration in FIG. Return loss and isolation are adjusted by changing the width w1 of the metal block 13. The position where the metal block 13 is added is not the output port 10b of the first transmission path 10 and the termination port side 11b of the second transmission path 11, but the input port 11a and the second transmission path of the first transmission path 10. 11 output port sides 11b. Further, the metal block 13 may be a metal plate fixed to the housing 100.
[Example 3]
FIG. 3 shows the configuration of the power combiner of the third embodiment. FIG. 3 is a view of the power combiner as viewed from above.

  The third embodiment has a structure in which a metal block 13 and a metal block 14 are added to the basic configuration shown in FIG. The return loss and the isolation are adjusted by changing the distances d1 and d2 between the first transmission path 10 and the second transmission path 11 and the metal blocks 13 and 14.

[Example 4]
A power combiner according to the fourth embodiment will be described with reference to FIG. As in the first embodiment, the fourth embodiment has a structure in which the metal block 13 and the metal block 14 are added to the basic configuration in FIG. Return loss and isolation are adjusted by changing the width w1 of the metal block 13 and the width w2 of the metal block 14.

[Example 5]
FIG. 5 shows the configuration of the power combiner of the fifth embodiment. FIG. 5 is a view of the power combiner as viewed from above.

  The fifth embodiment has a structure in which a metal plate 15 is added near the input port 10a of the first transmission path 10 and a metal plate 16 is added near the output port 10b of the first transmission path 10 in the basic configuration of FIG. And The return loss and the isolation are adjusted by changing the distance D1 between the input port 10a and the metal plate 15 and the distance D2 between the input port 11a and the metal plate 16.

[Example 6]
The power combiner according to the sixth embodiment will be described with reference to FIG. The sixth embodiment has a structure in which a metal plate 15 is added near the input port 10a of the first transmission path 10 and a metal plate 16 is added near the output port 10b of the first transmission path 10 in the basic configuration of FIG. And By changing the overlapping length L1 between the input port 10a and the metal plate 15 and the overlapping length L2 between the input port 11a and the metal plate 16, the return loss and the isolation are adjusted.

[Example 7]
6 and 7 show a power combiner of the seventh embodiment. FIG. 7 is a diagram of the power combiner as viewed from the input port 10 a side of the first transmission path 10. FIG. 8 is a diagram of the power combiner as viewed from the output port 10 b side of the first transmission path 10.

  The seventh embodiment has a structure in which a metal plate 15 is added in the vicinity of the input port 10a of the first transmission path 10 and a metal plate 16 is added in the vicinity of the output port 10b of the first transmission path 10 in the basic configuration of FIG. And The return loss and the isolation are adjusted by changing the height H1 of the metal plate 15 and the height H2 of the metal plate 16.

[Example 8]
FIG. 8 shows a power combiner of the eighth embodiment. FIG. 8 is a view of the power combiner as viewed from above.

  In the basic configuration of FIG. 1, the eighth embodiment has a metal plate 15 in the vicinity of the input port 10 a of the first transmission path 10, a metal plate 16 in the vicinity of the output port 10 b of the first transmission path 10, and the second A metal plate 17 is added in the vicinity of the termination port 11 b of the transmission line 11, and a metal plate 18 is added in the vicinity of the output port 11 b of the second transmission line 11. Return loss and isolation are adjusted by changing the distances D1, D2, D3, and D4 between the ports 10a, 10b, 11a, and 11b and the metal plates 15, 16, 17, and 18.

[Example 9]
A power combiner according to the ninth embodiment will be described with reference to FIG. In the basic configuration of FIG. 1, the ninth embodiment has a metal plate 15 in the vicinity of the input port 10 a of the first transmission path 10, a metal plate 16 in the vicinity of the output port 10 b of the first transmission path 10, and the second A metal plate 17 is added in the vicinity of the termination port 11 b of the transmission line 11, and a metal plate 18 is added in the vicinity of the output port 11 b of the second transmission line 11. Return loss and isolation are adjusted by changing the overlapping lengths L1, L2, L3, and L4 of the ports 10a, 10b, 11a, and 11b and the metal plates 15, 16, 17, and 18.

[Example 10]
9 and 10 show a power combiner of the tenth embodiment. FIG. 9 is a diagram of the power combiner as viewed from the input port 10 a side of the first transmission path 10. FIG. 10 is a diagram of the power combiner as viewed from the output port 10 b side of the first transmission path 10.
In the basic configuration of FIG. 1, the tenth embodiment has a metal plate 15 near the input port 10a of the first transmission path 10, a metal plate 16 near the output port 10b of the first transmission path 10, and a second plate. A metal plate 17 is added in the vicinity of the termination port 11 b of the transmission line 11, and a metal plate 18 is added in the vicinity of the output port 11 b of the second transmission line 11. Return loss and isolation are adjusted by changing the heights H1, H2, H3, and H4 of the metal plates 15, 16, 17, and 18.

  Furthermore, the configurations shown in the first to tenth embodiments can be arbitrarily combined.

  Here, as an example, FIG. 11 shows a characteristic diagram of return loss and isolation in the power combiner of FIG. In FIG. 11, the horizontal axis represents frequency [MHz] and the vertical axis represents gain [dB]. Compared with FIG. 2 above, it can be seen that in FIG. 11, the return loss and isolation are improved to 30 dB or less over the frequency band from about 700 MHz to 900 MHz by the configuration of FIG.

As described above, according to the present embodiment, the return loss and the isolation can be easily adjusted only by adding a member such as a metal block or a metal plate without changing the basic structure as shown in FIG. Become. For this reason, it is not necessary to change a complicated structure in accordance with a desired channel, and manufacturing efficiency can be improved.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 100 ... Case, 10 ... 1st transmission line, 11 ... 2nd transmission line, 10a, 11a ... Input port, 10b ... Output port, 11b ... Termination port, 12a, 12b, 12c, 12d ... Connection part, 13 , 14 ... Metal block, 15, 16, 17, 18 ... Metal plate.

Claims (9)

A first transmission line having one end as an input port and the other end as an output port;
A second transmission line coupled to the first transmission line and having one end as an input port;
An intersection between one end side of the first transmission path and one end side of the second transmission path is defined as a first corner,
The intersection of the other end side of the first transmission path and the other end side of the second transmission path is a second corner,
A portion that couples the first transmission line and the second transmission line is a coupling line,
In the first corner, the port connection portion of the first transmission line is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the first corner, the port connection portion of the second transmission path is formed by bending in a direction orthogonal to the first transmission path with respect to the plane of the coupling line,
In the second corner, the port connection portion of the first transmission path is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the second corner, the port connection portion of the second transmission line is formed to be bent in a direction orthogonal to the first transmission line with respect to the plane of the coupling line,
Comprising a first metal block disposed parallel to the first corner;
A power combiner that adjusts return loss and isolation by adjusting a width of the first metal block. A second metal block disposed in parallel with the second corner;
The power combiner according to claim 1, further comprising adjusting a width of the second metal block. A first transmission line having one end as an input port and the other end as an output port;
A second transmission line coupled to the first transmission line and having one end as an input port;
An intersection between one end side of the first transmission path and one end side of the second transmission path is defined as a first corner,
The intersection of the other end side of the first transmission path and the other end side of the second transmission path is a second corner,
A portion that couples the first transmission line and the second transmission line is a coupling line,
In the first corner, the port connection portion of the first transmission line is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the first corner, the port connection portion of the second transmission path is formed by bending in a direction orthogonal to the first transmission path with respect to the plane of the coupling line,
In the second corner, the port connection portion of the first transmission path is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the second corner, the port connection portion of the second transmission line is formed to be bent in a direction orthogonal to the first transmission line with respect to the plane of the coupling line,
A first metal plate disposed on one end side of the first transmission line in parallel with the transmission line;
A second metal plate disposed in parallel to the transmission line on the other end side of the first transmission line;
A power combiner that adjusts return loss and isolation by adjusting a distance between the first transmission line and the first metal plate and the second metal plate. A third metal plate disposed on one end side of the second transmission path in parallel with the transmission path;
A fourth metal plate disposed in parallel with the transmission line on the other end side of the second transmission line;
The power combiner according to claim 3, further comprising adjusting a distance between the second transmission path and the third metal plate and the fourth metal plate. A first transmission line having one end as an input port and the other end as an output port;
A second transmission line coupled to the first transmission line and having one end as an input port;
An intersection between one end side of the first transmission path and one end side of the second transmission path is defined as a first corner,
The intersection of the other end side of the first transmission path and the other end side of the second transmission path is a second corner,
A portion that couples the first transmission line and the second transmission line is a coupling line,
In the first corner, the port connection portion of the first transmission line is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the first corner, the port connection portion of the second transmission path is formed by bending in a direction orthogonal to the first transmission path with respect to the plane of the coupling line,
In the second corner, the port connection portion of the first transmission path is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the second corner, the port connection portion of the second transmission line is formed to be bent in a direction orthogonal to the first transmission line with respect to the plane of the coupling line,
A first metal plate disposed on one end side of the first transmission line in parallel with the transmission line;
A second metal plate disposed in parallel to the transmission line on the other end side of the first transmission line;
A power combiner that adjusts return loss and isolation by adjusting a length of overlap between the first transmission line and the first metal plate and the second metal plate. A third metal plate disposed on one end side of the second transmission path in parallel with the transmission path;
A fourth metal plate disposed in parallel with the transmission line on the other end side of the second transmission line;
The power combiner according to claim 5, further comprising adjusting an overlapping length of the second transmission line, the third metal plate, and the fourth metal plate. A first transmission line having one end as an input port and the other end as an output port;
A second transmission line coupled to the first transmission line and having one end as an input port;
An intersection between one end side of the first transmission path and one end side of the second transmission path is defined as a first corner,
The intersection of the other end side of the first transmission path and the other end side of the second transmission path is a second corner,
A portion that couples the first transmission line and the second transmission line is a coupling line,
In the first corner, the port connection portion of the first transmission line is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the first corner, the port connection portion of the second transmission path is formed by bending in a direction orthogonal to the first transmission path with respect to the plane of the coupling line,
In the second corner, the port connection portion of the first transmission path is formed to be bent in a direction perpendicular to the plane of the coupling line,
In the second corner, the port connection portion of the second transmission line is formed to be bent in a direction orthogonal to the first transmission line with respect to the plane of the coupling line,
A first metal plate disposed on one end side of the first transmission line in parallel with the transmission line;
A second metal plate disposed in parallel to the transmission line on the other end side of the first transmission line;
A composite distributor, wherein return loss and isolation are adjusted by adjusting heights of the first metal plate and the second metal plate. A third metal plate disposed on one end side of the second transmission path in parallel with the transmission path;
A fourth metal plate disposed in parallel with the transmission line on the other end side of the second transmission line;
The composite distributor according to claim 7, further comprising adjusting heights of the third metal plate and the fourth metal plate.   9. A power distributor comprising the power combiner according to claim 1 as a power distributor.

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