JPH0423605A - Amplifier device - Google Patents

Abstract

PURPOSE:To interrupt electrically a desired amplifier unit from other units without giving effect on the other amplifier units by providing a switch respectively between an input terminal of each amplifier unit and ground and between an output terminal and ground in the amplifier device in which plural amplifier units are connected in parallel. CONSTITUTION:An input terminal 10 is branched into (m) through a circulator 11 and a transmission line TL 12 and the branched lines are connected respectively to m-sets of transmission lines 131-13m. A signal via the transmission lines 131-13m is separately to amplifier units 151-15m. One terminal of transmission lines 171-17m connects to each output terminal of the amplifier units 151-15m and the other terminal connects to a transmission line 18. Moreover, switches SW141-14m are connected between the input terminal of the amplifier units 151-15m and ground and switches SW161-16m are connected between the output terminal of the amplifier units 151-15m are ground respectively. When only the transmission lines 131, 171 are selected electrically to be connected to ground, the line is short-circuited at points A, B and opened at points A', B' thereby interrupting the amplifier unit 151 equivalently.

Description

[Detailed Description of the Invention] [Summary] Regarding an amplification device in which a plurality of amplification units are connected in parallel, the purpose of this invention is to electrically isolate a desired amplification unit without affecting the operation of other amplification units, and to reduce the input impedance Z0. A first circulator and a length λg/4 (however,
λg is the wavelength), and m-branched signals (where m is an integer of 2 or more) are input separately on the output side of the first transmission line, each with a characteristic impedance Z, A total of m second transmission lines with length (λg/4) + (λg/2) x n (where n is 0 or a natural number) and the signals that have passed through the second transmission lines are input separately. A total of m amplification units perform power amplification independently of each other, and each output signal of the amplification units is input separately. Each has a characteristic impedance Z0 and a length (λg/4) + (λg/
2)×n, a total of m third transmission lines, a first switch connected between the connection point between the second transmission line and the amplification unit, and the ground, and a first switch connected between the amplification unit and the amplification unit. A second switch connected between the connection point with the third transmission line and the ground, and a characteristic impedance Z, which synthesizes each output signal of the third transmission line and converts the impedance, and has a length λg/ 4, and a second circulator with an output impedance Z0 that outputs a signal passed through the fourth transmission line to an output terminal.

[Industrial application field]

The present invention relates to an amplification device, and particularly to an amplification device in which a plurality of amplification units are connected in parallel.

In FM multiplex radio equipment, in-vehicle radio equipment, etc., multiple power amplifier units (hereinafter referred to as PA units) are installed in parallel in order to amplify information signals with very low power to high power and transmit the input information signals. An amplification device is used in which the information signals are distributed by a distribution circuit and input to each of the plurality of PA units, and the information signals amplified and extracted from the plurality of PA units are combined by an output power combiner and extracted as a transmission signal. .

In this type of amplifier, when the line capacity is small due to traffic reduction such as at night, or when a PA unit breaks down for some reason, the PA unit that is no longer needed or the failed PA unit can be used for operation of other PA units. There is a need for quick and easy removal without affecting the product.

[Conventional technology]

FIG. 6 shows a configuration diagram of an example of a conventional amplifier device.

In the figure, the information signal from the input synthesis circuit input to the terminal 61 is sent to the circulator 62 with input impedance Z0.
through the characteristic impedance Z.

The impedance is converted by a transmission line (hereinafter referred to as TL) 63 with a length of λg/4 (where λg is the wavelength), and the branch is divided into four branches, each with a length of characteristic impedance Z0 of λg/4.
The signals are inputted to PA units 661 to 664 via TLs 64+ to 644 of No. 2 and connectors 651 to 654, and are amplified in power, respectively.

Each of the PA units 66 to 664 has a circulator 6
61, ~6614, power amplifier (PA) 6621~66
24 and circulators 663-663. It consists of The information signals taken out from these PA units 661-664 are connected to connectors 67□-674, with characteristic impedance z0 and length Ag/2(7)TL68. ~68
．． The signals are synthesized through the respective signals, and are commonly input to a TL 69 having a characteristic impedance Z and a length Ag/4, where the impedance is converted, and then taken out via a circulator 70 to a terminal 71 as a transmission output signal. Therefore, this transmission output signal is amplified to a power four times as large as the power amplification factor of each of the PA units 661 to 664.

The above TLs 63, 641-64m, 681-684 and 69 are constructed by strip lines or coaxial cables, and the circulators 62, TLs 63 and 64
．． TL68. to 644 constitute an input distribution circuit, and TL68. ~68
m, 69 and the circulator 70 constitute an output power combining amplifier.

Here, when removing the PA unit 661 among the four PA units 661 to 664 for maintenance etc., remove the input side connector 65+ of the PA unit 661, and then remove the output side connector 67 of the PA unit 66, Remove.

At this time, points A and B each become an oven, and the synthesis points A- and B'' also become ovens, so even if the PA unit 661 is removed, no other PA unit 66m
, 66s and 664.

[Problem to be solved by the invention]

However, the above-mentioned conventional amplifier device has a PA unit 66.
1 to 664 must be removed by maintenance personnel from connectors 651 to 65.
This was done by mechanically removing the parts 671-674, which was very inconvenient and had to be done at the front of the device.

The present invention has been made in view of the above points, and an object of the present invention is to provide an amplification device that can electrically disconnect a desired amplification unit without affecting the operation of other amplification units.

[Means to solve the problem]

FIG. 1(A) shows a principle configuration diagram of the first invention according to claim 1. In the figure, the input terminal 10 has an input impedance Z0
The first circulator 11, characteristic impedance Z1
are branched into m branches (where m is an integer of 2 or more) via a first transmission line (TL) 12 with a length of Ag/4 (where λg is the wavelength), and each branch has a characteristic impedance Z0 and a length (Ag
/4)+(Ag/2)×n (where n is 0 or a natural number), a total of m second transmission lines 13. ~13, are connected separately.

15□〜15. is an amplification unit, and the second transmission line 13
．． ~13. The signals passed through are input separately and gutter power amplification is performed independently of each other. 17+ to 17 are the third transmission lines, each with characteristic impedance Z0 and length (Ag/4)
+(Ag/2)Xn, one end is the amplification unit 151-1
5. The other end is connected to a fourth transmission line 18 having a characteristic impedance Z1 and a length Ag/4.

Also, 141-14. is the first switch (SW) and the second transmission line 13. ~13. and amplification unit 15□~1
5. Which connection point is connected between each connection point and earth. Also, 16□~16. is a second switch (SW), which connects the third transmission lines 17□ to 17. and amplification units 151-15.
Which connection point is connected between each connection point and earth. 19 more
is a circulator.

The present invention provides first and second switches 141 to 14, and
61-16. It is distinctive in that it has been set up.

FIG. 1(B) shows a principle configuration diagram of the second invention according to claim 2. In the figure, the same components as those in FIG.

In FIG. 1(B), 221 to 221 each have characteristic impedance Z0 and length (Ag/2) x n (where n'
is a natural number), a total of m second transmission lines, 231 to 2
3m is the first switch, 241-24. is a second switch, and 251 to 25 are third transmission lines each having a characteristic impedance Z0 and a length (λg/2)×n''.

This second invention has a first switch 23. ~23° to the second transmission line 221~22. and amplification units 15, -15.
and the input side of the second switch 2.
4. ~24. amplification units 151-15. output side and the third transmission line 25, to 25. It is characterized by the fact that it is connected in series with the

[Effect]

In the first invention, the first switch 14. ~14. .

When the second switches 17□ to 17□ are not connected to the ground, the amplification units 15, to 15
．． The signals are inputted without being attenuated to the amplification units 151-15. The output signal of the third transmission line 17.
~17. guided by.

On the other hand, the first switch 14. ~14m, second switch 17, ~17. is electrically switched to be connected to ground, the transmission line 13° to 13. and 171-1
7. The terminals on the amplification units 151 to t5 side are short-circuited, and the terminals on the opposite side of the synthesis point are open. Therefore, for example, if only the transmission line 131°171 is electrically switched to be connected to the ground, there will be a short circuit at points A and B, and a short circuit at points A' and B.
Since it becomes open at point ', the amplification unit 15. or isometrically separated.

Next, the operation of the second invention will be explained. In FIG. 1(B), switches 231 to 231°24, to 24. When the transmission lines 221 to 221 are turned off to create a signal cut-off state,
22°, each amplification unit 15 from 251 to 251. ~15
．． One end of each side is open. Therefore, switch 2
3-23m, 24. ~24. For example, 231°24
, are turned on and the others are turned off, points A and B are open, and the amplification unit 151 is connected to the other amplification unit 1.
5. ~15. separated without affecting.

〔Example〕

FIG. 2 shows a configuration diagram of a first embodiment of the present invention.

In the figure, the same components as in FIG. 1(A) are given the same reference numerals. The embodiment shown in FIG. 2 is the amplifier device shown in FIG. 1(A) with m=4. In the example of n=0, the switches 141~
14. , and +7. This is an example in which a PIN diode is used in .

In addition, the input impedance Z0 of the circulator 11 and the output impedance Z0 of the circulator 19 are 50
Let it be Ω.

In FIG. 2, switch 14. ~144 is a PIN diode 31. whose cathode is grounded. ~31, and bias coil 32. ~324. Also,
Similarly, the switches 161 to 164 also have PIN diodes 33, to 334 whose cathodes are grounded, and the bias coil 3.
4. ~34. Amplification unit 15
□ to 154 are circulators 1511 to 1514, respectively, and power amplifiers (PA) 152. 1524 and circulators 1531 to 1534 are connected in series, forming a PA unit.

This amplification unit (hereinafter referred to as PA unit) 151~
In this embodiment, there are four PA units, but the standard is the case where three PA units are operated in parallel, and the PA units are assumed to be operated in parallel with either two, three, or four units (for each implementation described later). example).

Next, the transmission line (TL) of this embodiment 12. l 3+
~134.17. The characteristic impedances of ~17m and 18 will be explained. The input distribution circuit on the input side and the output power combiner on the output side of the PA units 15□ to 154 of the first embodiment shown in FIG. 2 have opposite signal flows and have symmetrical circuit configurations, and their equivalent The circuit is shown in FIG. In the figure, the same components as those in FIG. 2 are denoted by the same reference numerals, and the explanation thereof will be omitted.

In Fig. 3, the stripline is a distributed line composed of coaxial cables, and among each TL, TL12 (
Impedance Z when looking at a 50Ω load from 18)
, when the number of parallel loads is X, becomes the following. Here, the maximum number of parallel loads X is "4", but from the viewpoint of reducing mismatch loss, the number of parallel loads (number of PA units) X is set to "3" as described above. Therefore, the above impedance z2 becomes 16.7 (=50/3)Ω from the above equation.

Also, TL12 with length λg/4 and characteristic impedance 2
(18) TL13. ~13° (17+-174) or the impedance Z seen from the unconnected terminal 30 to the load side, and the impedance Z0 seen from the opposite side (circulator 11 (19) side) from the terminal 30 for matching.
It needs to be equal to . Therefore, l =Z, =50
It is Ω.

Also, the above characteristic impedance Z, is z,=(”B=
It can be calculated using the formula: 薯 ＝ r ツ - 歯汀. Therefore, in the above formula, Z, = 1
6. Substituting 7 (Ω) and Zo = 50 (Ω),
Z+ is 28.9 (#50/r) Q and '(:ru.

Further, the reflection coefficient F, the voltage standing wave ratio (VSWR) ρ, and the power loss Pf due to mismatch can be calculated using the following equations.

1+r PA=10fog (1-r2) From this, impedance Z2, l, and VSW when 2 to 4 FA units 151 to 154 are connected in parallel.
A summary of R etc. is as shown in the following table.

However, the total mismatch loss is the sum of the mismatch losses of both the input divider and the output power combiner.

As can be seen from the table above, when the number of PA units operated in parallel is set to 4, 3, or 2, according to this embodiment, the number of parallel operations is set to "3". The number of units operating in parallel is 4.

Even in the case of two units, mismatch loss can be minimized.

Furthermore, when the number of PA units operated in parallel is set to either 4, 3 or 2, the number of PA units operated in parallel can be set to 4 as a standard. At this time, although the difference in mismatch loss becomes large when the number of PA units operating in parallel is 4 and 2, the mismatch loss when the maximum number of parallel operating units is 4 can be reduced to OdB in principle.

PA unit 15. The following table summarizes the impedance Z, Z, and VSWR when two to four units of ~154 are connected in parallel.

However, the total mismatch loss is the sum of the mismatch losses of both the input divider and the output power combiner.

The characteristic impedance Z1 at this time is = 25 (Ω) becomes.

Further, the reflection coefficient F, voltage standing wave ratio (VSWR) ρ, and power loss due to mismatch can be calculated using the following equations.

Z, +12.5l +F PIl=101og (1-r'') To explain again by returning to FIG.
is bias coil 32. 324, and the PIN diodes 33+ to 334 are also reverse biased by the negative DC voltage applied through the biasing coils 34. ~344
is reverse biased by a negative DC voltage applied through. In this case, the negative DC voltage is set to, for example, -300V when the average output power at terminal 20 is 200W, so as not to rectify the passing signal.

However, if the PIN diodes are generally reverse biased, the effect may be unavoidable due to the capacitance between the electrodes, or the PIN diodes 311 to 314 and 33. ~3
Reference numeral 34 is an internal matching type diode which has an inductance built in, and forms a low-pass filter with this inductance and interelectrode capacitance, and matches the input and output to 50Ω. For this reason, the P■N diode 31. ~314 and 331~3
3 can be connected to a transmission line with a characteristic impedance of 50Ω without an external matching circuit.

Next, the operation of this embodiment will be explained. The signal that passes through the circulator 11 from the input terminal 10 is given the impedance Z by the characteristic impedance z1 or TL12 of 28.9Ω and length λg/4.

After impedance conversion to (~16.7Ω), TL13 with characteristic impedance 50Ω and length λg/4, ~1
3. The PIN diode 31. Switch 14 by ~314
．． -144 are input to PA units 151-154, respectively.

PA unit 15. The signals power-amplified independently by ~154 are passed through PIN diodes 33□~334 connected between ground and at a position λg/4 away from the synthesis point.
T L 17 with a characteristic impedance of 50Ω and a length λg/4
+~17a, characteristic impedance 28,
After being matched to 50Ω in the TL 18 of 9Ω and length λg/4, it is outputted to the terminal 20 via the circulator 19 as a transmission output signal of high power (for example, 200W). The circulator 19 is provided to ensure sufficient matching with the load even if the output impedance of the output power combiner changes.

In the first embodiment of the amplifier device having such a configuration, when it is desired to remove the PA unit 15 for troubleshooting, for example, the bias coils 321, 34. Applying a positive DC voltage to the PIN diode 31331 via
PIN diodes 31+ and 33. forward bias respectively.

This causes the PIN diode 31. and 331 are respectively turned on, short-circuiting points A and B on the anode side to ground, and opening at branch points A' and B'. This results in
PA unit 15. is isometrically separated at branch points A' and B'.

In this case, the input signal is the remaining PA unit 152.15
．． and 154, each PA unit 15
□～15. Since the output of PA units 152 to 154 increases accordingly and is supplied to the load, if there is a margin in the output of each PA unit 152 to 154, the final combined output level can be kept almost unchanged even if the number of parallel operations is changed.

As described above, according to this embodiment, even when a PA unit is disconnected, stable power combining characteristics can be obtained without adversely affecting other PA units, and it is also possible to electrically disconnect a PA unit. Therefore, the operation for disconnecting the PA unit by a maintenance person or the like can be made extremely simple.

Next, a second embodiment of the present invention will be described. FIG. 4 is a block diagram of a second embodiment of the present invention, in which the same components as in FIG. 1(B) are given the same reference numerals.

In this embodiment, m=4゜n of the amplifier shown in Fig. 1(B).
=1, and switch 23. ~23-.

24□～24. This is an example in which a PIN diode is used.

In FIG. 4, switch 23. ~234 is 1 PI
N diodes 41+ to 414 and PIN diode 41
．． Two bias coils 421-424 and 431-434 connected to the anode and cathode of ~414, respectively
It is composed of. Similarly, switches 24+ to 24
4 also includes one PIN diode 441 to 444 and two bias coils 45. ~45. and 46. ~464. The above PIN diodes 411-4
1. and 44. -444 have their anodes connected to PA units 151-15. and its cathode is connected in series to TL2.
21-2241251-254 are connected in series.

Above TL221-224 and 25. ~254 are 50 whose characteristic impedance is equal to the input impedance Z0 or output impedance Z of the circulator 11°19, respectively.
Ω, and the PA unit 15. ~154 side is switch 23. 〜234. When it becomes open according to 241 to 244, the length is λ so that the branching point and the combining point are open.
g/2 (or an integral multiple thereof).

In this embodiment, the PA unit 15. ~ PIN when using 154
Bias coils 421-42. are connected to the anodes of diodes 41+-414. A positive DC voltage is applied through the PIN diodes 41+ to 41. to forward bias them. is turned on, and the PIN diode 44. .about.444 is similarly forward biased and turned on.

In addition, PA units 15□ to 15. When disconnecting any PA unit among them, use the PIN diode 41. ~4
1m, 44. A negative DC voltage is applied to the two PIN diodes on the input side and the output side of the PA unit to be separated out of ~444, respectively, to reverse bias them and turn them off.

As a result, TL221-224125. ~254, the T connected to the turned off PIN diode
The impedance of L is open at the point on the PA unit side, and also at its input branch point or its output synthesis point. Therefore, this embodiment also has the same effects as the first embodiment.

By the way, when the present inventor investigated the reliability of the PIN diode for high power signals, it was found that the failure rate of a single low power PIN diode is 10fit, which is 20fit.
It has a high reliability of ~100 times.

Therefore, it can be said that the system as a whole has sufficient reliability even if a high power PIN diode is used. Therefore, 2
PIN diode 31 used in each embodiment with 00W transmission output. ~31m, 33. ~33°, 41. ~41m, 4
4. ~44. (However, in each example, m=4) can be used with high power to obtain sufficiently high reliability. However, since the PIN diode may still fail, the following third embodiment has a structure that takes into consideration maintenance and replacement in case of failure of the PIN diode.

FIG. 5 shows a configuration diagram of main parts of a third embodiment of the present invention.

In the figure, the same components as those in FIG. 2 are denoted by the same reference numerals, and the explanation thereof will be omitted. In FIG. 5, 501 (however,
1==1-4) is TL17i.

This is a first housing in which a PIN diode 33i and a bias coil 34i are mounted, and is provided for each branch.

A connector 51i is provided at the connection point between the anode of the PIN diode 33i of the first housing 50i and one end of the TL 17i, and another connector 52i is connected to the other end of the TL 17i.

Also, 53i has a characteristic impedance Z of 50Ω and a length l.
or (λg/2)Xn-, one end of which is connected to the connector 54i. The other end of TL53i is commonly connected to one end of TL18. This T L 53 + ~ 53m, T
L18 and circulator 19 are in the same second housing 55
implemented within. Further, the second housing 55 is provided with connectors 54° to 544.

As a result, the PA unit 15. 154 in parallel operation, the connectors 51 .
5L are detachably connected to the output side connectors of the PA units 15 to 154, and the connectors 521 to 5
24 is a connector 54 of the second housing 55. ~544 in a detachable manner.

Here, among the PIN diodes 33□ to 334, for example, 33. When ON is turned on, the output terminal of TL17+ becomes open, and therefore TL53 of length (λg/2) x n-
．． Since the input end and output end of the PA unit 151 are both open, in this case, the PA unit 151 can be disconnected without affecting the other PA units 152 to 154.

Further, among the PIN diodes 331 to 334, for example, P
It is assumed that the IN diode 331 has failed. In this case, when the first housing 501 is separated for maintenance or replacement, the connector 541 is opened and the TL53. Since the output terminal (synthesis point) of is also open, the operating units 152~
154 without any effect on the faulty PIN.
Diode 33. can be replaced or repaired very easily.

In addition, in FIG. 5, the output power combiner of the first embodiment is divided into multiple cases, but this is because the output power combiner handles much more power than the input distribution circuit. Output power combiner PIN diode 33. This is because the PIN diodes 311 to 314 of the input distribution circuit are much more likely to fail than the PIN diodes 311 to 314 of the input distribution circuit. However, of course, the input distribution circuit may be divided into a plurality of cases. Further, the same technology as in the third embodiment can also be applied to the output power combiner and/or input distribution circuit of the second embodiment.

The present invention also provides a switch 14. ~14. .

16, ~16m, 23. ~23-, 24. ~241 P
It may be configured with an IN diode and a bias coil, or a relay may be used, and in short, any configuration that can be electrically switched is sufficient.

〔Effect of the invention〕

As described above, according to the present invention, switches are provided between the input side of the amplification unit and the input distribution circuit, and between the output side of the amplification unit and the output power combiner.
Amplification units can be electrically disconnected without affecting the operation of other amplification units, which improves operability compared to conventional connectors. The switch has a configuration in which a first housing containing a switch, etc., provided for each branch, and a second housing containing a transmission line, etc. for combining them, are removably connected to a connector, making maintenance of the switch easier. , replacement can be performed extremely easily, and when increasing or decreasing amplification units within the range of j±k (however, j+k=m, j>k) out of m amplification units, it is possible to Since the characteristic impedance of the transmission line for impedance conversion connected to the circulator is set to Z o / fl-, mismatch loss can be minimized. In principle, mismatch loss when mounting m units can be set to /r balls.
dB.

[Brief explanation of drawings]

Fig. 1 is a diagram of the principle configuration of the present invention, Fig. 2 is a block diagram of the first embodiment of the invention, Fig. 3 is an equivalent circuit diagram of an output power combiner and input divider, and Fig. 4 is a diagram of the principle of the present invention. FIG. 5 is a block diagram of the second embodiment, FIG. 5 is a block diagram of the third embodiment of the present invention, and FIG. 6 is a block diagram of an example of a conventional amplifier device. In the figure, 11.19 is a circulator, 12.13. ~t3m, 17. ~17m, 18°221
~22m, 251~25m, 53□~534 are transmission lines (TL), 14+~14m, 23+~23° are first switches, 151~15 are amplifier units, 16, ~16m, 241~24° are first switches 2 switches, 311-314. 331-334, 411-41m,
44□~444 are PIN diodes, 321~3241
34+ ~34m, 42. ~42m, 43. ~4344
51 to 454, 46 to 464 are bias coils, 501 to 504 are first casings, and 55 are second casings. Patent applicant Fujitsu Ltd. Figure 3

Claims (7)

[Claims] (1) A first circulator (11) with an input impedance Z_0, and a characteristic impedance Z that converts the input signal taken out from the first circulator (11) into impedance.
A first transmission line (12) of _1 and length λg/4 (where λg is the wavelength), and m branches on the output side of the first transmission line (12) (however,
m is an integer of 2 or more) are input separately, each with characteristic impedance Z_0 and length (λg/4) + (λ
g/2)×n (where n is 0 or a natural number) in total m
a total of m amplification units (m amplification units (13_1 to 13_m) in which the signals passing through the second transmission lines (13_1 to 13_m) are input separately and perform power amplification independently of each other; 15_1 to 15_m) and each output signal of the amplification unit (15_1 to 15_m) is input separately, each having characteristic impedance Z_0 and length (λg/4)+(λg/2)×n, m in total. the third
transmission lines (17_1 to 17_m), the second transmission line (13_1 to 13_m), and the amplification unit (15_1
-15_m) and the ground, and a connection point between the amplification unit (15_1-15_m) and the third transmission line (17_1-17_m). The output signals of the second switches (16_1 to 16_m) connected between 4, a fourth transmission line (18), and a signal passing through the fourth transmission line (18) to an output terminal (20
) A second circulator (19) with an output impedance Z_0 that outputs to the amplifier. (2) A first circulator (11) with an input impedance Z_0, and a characteristic impedance Z_ for impedance conversion of the input signal taken out from the first circulator (11).
1 and a length λg/4 (where λg is the wavelength) of the first transmission line (12), and m branches on the output side of the first transmission line (12) (however,
m is an integer of 2 or more) are input separately, each with characteristic impedance Z_0 and length (λg/2) x n'
(where n' is a natural number), a total of m second transmission lines (22_1 to 22_m), and a total of m second transmission lines (22_1 to 22_m) that pass or block signals that have passed through the second transmission lines (22_1 to 22_m). The first switch (23_
1 to 23_m) and the first switch (23_1 to 23_m), the input end is connected in series to the first switch (23_1 to 23_m), and the first switch (23_1 to 23_m)
) A total of m amplification units (15_1 to 15
_m) and the amplification units (15_1 to 15_m) are connected in series to each output terminal of the amplification units (15_1 to 15_m), respectively.
m) for passing or blocking each output signal of
The signals passing through the switches (24_1 to 24_m) and the second switches (24_1 to 24_m) are input separately, each with a characteristic impedance Z_0 and a length (λg/
2)×n' total of m third transmission lines (25_1 to
25_m) and the third transmission line (25_1 to 25_m
) and a fourth transmission line (18) with a characteristic impedance Z_1 and a length λg/4, which synthesizes the respective output signals of and converts the impedance, and the signal passing through the fourth transmission line (18) is connected to an output terminal (20
) A second circulator (19) with an output impedance Z_0 that outputs to the amplifier. (3) The first and second switches (14_1 to 14_
PIN diodes (31_1 to 31_m) connected between the input end or output end of the amplification unit (15_1 to 15_m) and the ground.
m, 33_1 to 33_m) and the PIN diode (3
1_1 to 31_m, 33_1 to 33_m), which supplies a bias signal to turn off when the signal passes and turn on when the signal is cut off.
, 34_1 to 34_m). (4) The first and second switches (23_1 to 23_
PIN diodes (41_1 to 41_m, 44_m) connected in series to the input end or output end of the amplification unit (15_1 to 15_m).
1 to 44_m) and the PIN diode (41_1 to 4
Bias coils (42_1 to 42_m, 43_1) that supply a bias signal to turn on when a signal passes and turn off when the signal is cut off to
~43_m, 45_1~45_m, 46_1~46_m
3. The amplifying device according to claim 2, wherein the amplifying device comprises: (5) The PIN diode (31_1 to 31_m, 3
3_1~33_m, 41_1~41_m, 44_1~4
4_m) and bias coils (32_1 to 32_m,
34_1~34_m, 42_1~42_m, 43_1~
43_m, 45_1~45_m, 46_1~46_m)
and the third transmission line (17_1~
17_m, 25_1 to 25_m) are mounted on the first casing (50_1 to 50_m) for each branch, respectively, and the connectors (
54_1 to 54_m), and the third transmission line (1
7_1 to 17_m, 25_1 to 25_m) with one end connected to each connector (52_1 to 52_m), characteristic impedance Z_0 and length (λg/2) x n
' (where n' is a natural number), a total of m fifth transmission lines (53_1 to 53_m) and the fifth transmission line (53_m)
3_1 to 53_m), one end of which is commonly connected to the other end of the fourth transmission line (18); and the fourth transmission line (18).
The amplifying device according to claim 3 or 4, characterized in that the second circulator (19) connected to the other end is mounted in the same second casing (55). (6) The m amplification units (15_1 to 15_m)
When increasing or decreasing the amplification units (15_1 to 15_m) within the range of j±k units (j+k=m, j>k), the characteristic impedance Z_1 is changed to Z_0/√
6. The amplification device according to claim 1, wherein the amplification device is set to j. (7) The m amplification units (15_1 to 15_m)
When increasing or decreasing the amplification units (15_1 to 15_m) within the range of j±k units (j+k=m, j>k), the characteristic impedance Z_1 is changed to Z_0/√
6. The amplifying device according to claim 1, wherein the amplifying device is set to m.