JP3746421B2 - Feedforward distortion compensation amplifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a distortion compensation amplifier used in a base station or a relay device of a mobile communication system such as an automobile phone, a mobile phone, or a personal handyphone system, and is reduced in size and loss by integrating a part of a circuit. And cost reduction.
[0002]
[Prior art]
A base station and a radio relay apparatus in a car phone, a mobile phone system, etc. are provided with a multi-frequency common amplifier that simultaneously amplifies multi-frequency signals. This multi-frequency common amplifier needs to have sufficiently good linearity in order to minimize the occurrence of intermodulation distortion, and a small and highly linear amplifier is used. One of them is a distortion compensation amplifier (self-adjusting feedforward amplifier), which is configured to compensate for intermodulation distortion and noise generated by the amplifier by self-adjustment.
[0003]
This distortion compensation amplifier is composed of a distortion detection circuit and a distortion removal circuit, detects distortion components other than the input signal by a distortion detection circuit including a main amplifier which is an amplifier to be compensated, and detects the detected distortion components (error components). After being input to a distortion removing circuit including an auxiliary amplifier (error amplifier) and amplifying distortion components, the distortion components are offset by synthesizing them in reverse phase with the multi-frequency amplified signal.
[0004]
FIG. 5 is a configuration example of a conventional distortion compensation amplifier. In the figure, 1 is an input terminal, 2 is a power divider that distributes its output, 3 is a first variable attenuator, 4 is a first variable phase shifter, 5 is a main amplifier, 6 is a delay device, and 7 is a first delay device. 1 is a power combiner, 8 is a second variable attenuator, 9 is a second variable phase shifter, 10 is an auxiliary amplifier, 11 is a delay filter, 12 is a second power combiner, 13 is a directional coupler, 14 is an isolator, 15 and 16 are termination resistors, 17, 18 and 19 are coaxial cables, 20 is an output terminal, 21 is a monitor terminal, and 22 is a connector.
[0005]
The input signal Pin is input to the power distributor 2 from the input terminal 1, is distributed to the delay line 6 and the first variable attenuator 3 through the main line branched into two, and the output of the first variable attenuator 3. Is amplified by the main amplifier 5 via the first variable phase shifter 4. An amplified signal including a distortion component generated at the time of amplification is input to the first power combiner 7, an input signal passing through the main line and the delay line 6 distributed by the power distributor 2, The power combiner 7 combines and detects distortion components.
[0006]
The amplified signal output from the first power combiner 7 is input to the second power combiner 12 via the delay filter 11. On the other hand, the distortion component output from the first power combiner 7 is amplified by the auxiliary amplifier 10 via the second variable attenuator 8 and the second variable phase shifter 9 and input to the second power combiner 12. As a result, the polarity is inverted and synthesized with the amplified signal including the distortion component input through the delay filter 11, so that the distortion component is canceled and a common amplified signal with less distortion is output. This output is obtained from the monitor terminal 21 by the directional coupler 13, and the unidirectionality is enhanced by the isolator 14 and is output from the output terminal 20 as the output signal Pout. Here, the delay filter 11 and the second power combiner 12, the second power combiner 12 and the directional coupler 13, and the directional coupler 13 and the isolator 14 are respectively connected by the connector 22 and the coaxial cables 17, 18, and 19. The termination resistors 15 and 16 are connected to the second power combiner 12 and the directional coupler 13 by connectors. In this distortion compensation amplifier, the variable attenuators 3 and 8 and the variable phase shifters 4 and 9 are adjusted by pilot signal control to perform a desired operation. However, illustration of these control systems is omitted.
[0007]
Further, a conventional power combiner and directional coupler generally have a triplate structure in which an electrode pattern is sandwiched between dielectric substrates as shown in FIG. The electrode pattern is connected to the input / output terminals, and the whole is housed in a shield case. The dielectric used in this triplate structure has a slightly larger loss than air. Further, since the conventional power combiner and directional coupler are individually housed in the shield case, many assembly steps are required.
[0008]
[Problems to be solved by the invention]
The conventional distortion compensation amplifier has a power detector, a delay circuit, a delay circuit, a power combiner, a directional coupler, an isolator, and a termination resistor in the distortion detection circuit, and a separate shield case. Are connected to each other by a connector and a coaxial cable, and a delay line using a delay filter or a coaxial cable is used as a delay device. Therefore, it is difficult to downsize the distortion compensation amplifier. In this case, it is difficult to reduce the size because a work space is required during assembly. Further, there has been a problem of cost reduction such as improvement of the efficiency of the distortion compensation amplifier, particularly reduction of loss after the first power combiner, reduction of material cost and reduction of assembly man-hours.
[0009]
In order to reduce the size of the distortion compensation amplifier, it is necessary to reduce the size of the distortion elimination circuit, and in order to realize low power consumption, it is necessary to reduce the power loss in the distortion elimination circuit. An object of the present invention is to provide a distortion compensation amplifier that solves the above-described problems and realizes miniaturization, low loss, and low cost.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, in the distortion compensation amplifier according to the present invention, the distortion compensation amplifier is reduced in size, loss and cost by using the following means.
[0011]
  That is, according to the present invention, the input signal is distributed by the power distributor, and one output is distributed from the power distributor by the signal amplified by the main amplifier via the first variable attenuator and the first variable phase shifter. A distortion detection circuit for detecting a distortion component generated in the main amplifier by combining a signal obtained by matching the output of the other output by a first delay unit with a first power combiner; A signal obtained by amplifying the distortion component output from the power combiner by an auxiliary amplifier via a second variable attenuator and a second variable phase shifter, and a main amplifier output from the first power combiner The signal amplified in step (2) is combined with the signal in which the timing is adjusted by the second delay unit to reverse-phase combine with the second power combiner to cancel the distortion component, and the monitor output is obtained with the directional coupler. To increase power and output power Comprises obtaining distortion elimination circuitFeed forwardIn the distortion compensation amplifier,The second delay device is a cavity resonator filter, and has a room for separating and shielding the second delay device and the second power combiner, and the second delay device, the second power combiner, It is characterized by having a shield case that integrally stores.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a distortion compensation amplifier according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing a first embodiment of a distortion compensation amplifier according to the present invention, in which the output of the first power combiner that is particularly important in improving the efficiency of the distortion compensation amplifier is integrated. FIG. In the figure, reference numerals 1 to 10 and 20 to 22 are the same as those shown in the conventional block diagram of FIG. 50 is an integrated delay filter (second delay device) according to the present invention, 51 is an integrated power combiner, 52 is an integrated directional coupler, 53 is an integrated isolator, Reference numeral 55 denotes an integrated termination resistor.
[0013]
In the present invention, a delay filter, a power combiner, a directional coupler, an isolator, and a termination resistor, which have conventionally been separately configured, are integrated, and a connector and a coaxial cable for connecting each of them are not required, thereby reducing the size and reducing the size. Cost was reduced. In other words, the space between the connector and the coaxial cable and the work space for connecting the connector and the plug of the coaxial cable are not required, so that the size can be reduced and the structure can be simplified and the number of assembling steps can be reduced. In addition, since an expensive connector for high frequency and a coaxial cable are not required, the cost can be reduced.
[0014]
FIG. 2 is a comparative example diagram of external dimensions and power loss in the conventional configuration and the configuration of the first embodiment of the present invention. In the configuration of the first embodiment of the present invention, the outer dimensions of the coaxial cable lengths W1, W2, and W3 can be shortened, and the losses Wl1, Wl2, and Wl3 of the coaxial cable can be reduced. For example, in the 2 GHz band, the length of the coaxial cable is 4 cm and the loss is about 0.1 dB, respectively, so that it is possible to reduce the outer dimension of 12 cm and the loss of about 0.3 dB for three coaxial cables. Further, in the conventional configuration, the delay amount variation due to variations in the cable lengths W1, W2, and W3 at the time of manufacturing the coaxial cable has been a problem. However, the present invention eliminates the need for the coaxial cable, so the delay amount is managed. Can be easily performed. In the conventional configuration, the power distributor, the power combiner, and the directional coupler generally have a triplate structure using a dielectric substrate. In the present invention, the conductor in the air is used. Since a wire in which wires are arranged close to each other is used, it is possible to reduce the cost corresponding to the loss of the dielectric while simultaneously reducing the cost with a simple structure.
[0015]
FIG. 3 is an example of an integrated structure of the distortion compensation amplifier according to the first embodiment of the present invention. 61 is a cavity resonator filter input terminal, 62 is a cavity resonator filter, 63 is an insulator, 64 and 65 are termination resistors, 66 is a monitor terminal, 67 is an output terminal, 68 is an isolator, 69 is a shield case, and 70 is an integral unit The integrated power combiner 71 is an integrated directional coupler, and 72 is a power combiner input terminal.
[0016]
In the first embodiment of the present invention, the cavity resonator filter 62, the power combiner 70, the directional coupler 71, and the isolator 68 are sequentially connected, and the junction portion is integrated with the shield case 69 and insulation such as Teflon. Insulated by the body 63, the shield case 69 is integrated as a structure having a room divided for each function in order to provide a shielding effect. Therefore, compared with the conventional case where each shield case is individually accommodated, one shield case can be used. For example, when making a shield case mold, three to one is sufficient, so the material cost is reduced. be able to. The cavity resonator type filter used in the present invention can be downsized as the operating frequency increases. That is, a predetermined number of stages is required to obtain a certain amount of delay, but the wavelength becomes shorter as the frequency becomes higher, so that the size can be reduced even with the same number of stages. Further, since the termination resistors 64 and 65 are directly screwed to the shield case, the heat radiation effect can be enhanced.
[0017]
FIG. 4 is a configuration example diagram showing a second embodiment of the distortion compensating amplifier according to the present invention. In the figure, reference numerals 1, 3 to 5, 8 to 10, and 20 to 22 are the same as those shown in the conventional configuration diagram of FIG. Reference numerals 51 to 55 are the same as those shown in the configuration example diagram of the first embodiment of the present invention shown in FIG. 50 is an integrated second delay filter (delay device), 56 is an integrated power divider, 57 is an integrated first delay filter (delay device), and 58 is an integrated first delay filter. It is a power combiner.
[0018]
In the second embodiment of the present invention, the power divider, the first delay device, the first power combiner, the second delay device, the second power combiner, and the direction, which have been conventionally configured separately from each other, are provided. The sex coupler, the isolator, and the termination resistor are integrated, and a connector and a coaxial cable for connecting each of them are not required, and further downsizing and cost reduction are achieved as compared with the first embodiment.
[0019]
In the configuration of the first embodiment, the second delay device, the second power combiner, the directional coupler, the isolator, and the termination resistor are integrated. In the configuration of the second embodiment, power distribution is performed. In the present invention, an example has been shown in which a first unit, a first delay unit, a first power combiner, a second delay unit, a second power combiner, a directional coupler, an isolator, and a termination resistor are integrated. Are not necessarily limited to the combination described above, but include a power distributor, a first delay device, a first power combiner, a second delay device, a second power combiner, a directional coupler, and an isolator. The object of the present invention can be achieved by integrating at least two of the terminal resistors.
[0020]
Hereinafter, the various combinations of integration will be described in detail, but for the sake of simplicity, the description will be made assuming that the termination resistors are already integrated.
First, when two adjacent configurations of a power distributor, a first delay device, a first power combiner, a second delay device, a second power combiner, a directional coupler, and an isolator are integrated The third to eighth embodiments will be described with reference to the configuration example diagrams of FIGS. 7 to 12. Although FIGS. 7 to 12 show the state where the terminal resistors are integrated, they may not be integrated.
[0021]
As shown in FIG. 7, the distortion compensating amplifier according to the third embodiment of the present invention integrates the power divider and the first delay device in the distortion detection circuit, and integrates the power divider 56. The first delay device 57 is integrated with the connector, and a connector and a coaxial cable are not required for connection therebetween, and other configurations (reference numerals 1, 3 to 5, 7 to 14, 20 to 22) It is what was shown in the conventional block diagram of FIG.
[0022]
As shown in FIG. 8, the distortion compensation amplifier according to the fourth embodiment of the present invention integrates the first delay unit and the first power combiner in the distortion detection circuit, and integrates the first delay unit and the first power combiner. The first power combiner 58 integrated with the first delay device 57 eliminates the need for a connector and a coaxial cable for connection therebetween, and other configurations (reference numerals 1 to 5, 8 to 14, 20 -22) is shown in the conventional block diagram of FIG.
[0023]
As shown in FIG. 9, the distortion compensating amplifier according to the fifth embodiment of the present invention is formed by integrating the first power combiner and the second delay unit in the distortion removing circuit. 1 and a second delay unit 50 integrated with each other, and a connector and a coaxial cable for connecting between them are unnecessary, and other configurations (reference numerals 1 to 6, 8 to 10, 12-14, 20-22) are shown in the conventional block diagram of FIG.
[0024]
As shown in FIG. 10, the distortion compensation amplifier according to the sixth embodiment of the present invention integrates the second delay unit and the second power combiner in the distortion elimination circuit, and integrates the second delay unit and the second power combiner. 2 and the second power combiner 51 integrated with the second delay unit 50, eliminating the need for a connector and a coaxial cable for connecting between them, and other configurations (reference numerals 1 to 10, 13 to 14, 20 to 22) are shown in the conventional block diagram of FIG.
[0025]
As shown in FIG. 11, the distortion compensating amplifier according to the seventh embodiment of the present invention integrates the second power combiner and the directional coupler in the distortion removal circuit, and integrates the second power combiner and the directional coupler. Power synthesizer 51 and directional coupler 52 integrated with each other, eliminating the need for a connector and a coaxial cable for connecting between them, and other configurations (reference numerals 1 to 11, 14, 20 to 22) These are shown in the conventional configuration diagram of FIG.
[0026]
As shown in FIG. 12, the distortion compensating amplifier according to the eighth embodiment of the present invention is integrated with the integrated directional coupler 52 by integrating the directional coupler and the isolator in the distortion removing circuit. It is composed of an isolated isolator 53 and does not require a connector and a coaxial cable for connecting between them, and other configurations (reference numerals 1 to 12, 20 to 22) are those shown in the conventional configuration diagram of FIG. It is.
[0027]
Next, the three adjacent components of the power distributor, the first delay device, the first power combiner, the second delay device, the second power combiner, the directional coupler, and the isolator are integrated. The case will be described as the ninth to thirteenth embodiments with reference to the configuration example diagrams of FIGS. 13 to 17 show a state in which the terminal resistance is integrated, it may not be integrated.
[0028]
As shown in FIG. 13, the distortion compensation amplifier according to the ninth embodiment of the present invention integrates the power divider, the first delay unit, and the first power combiner in the distortion detection circuit. The first power combiner 58 integrated with the first delay unit 57 integrated with the integrated power distributor 56, eliminates the need for a connector and a coaxial cable for connecting between them, and others The configuration (reference numerals 1, 3 to 5, 8 to 14, 20 to 22) is shown in the conventional configuration diagram of FIG.
[0029]
As shown in FIG. 14, the distortion compensation amplifier according to the tenth embodiment of the present invention includes a first delay unit, a first power combiner in the distortion detection circuit, and a second delay unit in the distortion removal circuit. Are integrated into a first delay device 57, a first power combiner 58 integrated with a second delay device 50, and a connector for connecting between them. The other configuration (reference numerals 1 to 5, 8 to 10, 12 to 14, and 20 to 22) is the same as that shown in the conventional configuration diagram of FIG.
[0030]
As shown in FIG. 15, the distortion compensating amplifier according to the eleventh embodiment of the present invention integrates the first power combiner, the second delay unit, and the second power combiner in the distortion removal circuit. The integrated first power combiner 58, the integrated second delay unit 50, and the integrated second power combiner 51, and a connector and a coaxial for connecting between them The cable is unnecessary, and the other configurations (reference numerals 1 to 6, 8 to 10, 13 to 14, and 20 to 22) are those shown in the conventional configuration diagram of FIG.
[0031]
As shown in FIG. 16, the distortion compensation amplifier according to the twelfth embodiment of the present invention integrates the second delay device, the second power combiner, and the directional coupler in the distortion removal circuit, The integrated second delay device 50, the integrated second power combiner 51, and the integrated directional coupler 52 are used, and a connector and a coaxial cable for connecting between them are not required. Other configurations (reference numerals 1 to 10, 14, 20 to 22) are those shown in the conventional configuration diagram of FIG.
[0032]
As shown in FIG. 17, the distortion compensating amplifier according to the thirteenth embodiment of the present invention is formed by integrating the second power combiner, the directional coupler, and the isolator in the distortion removal circuit. A directional coupler 52 integrated with the second power combiner 51 and an isolator 53 integrated with the second power combiner 51 eliminate the need for a connector and a coaxial cable for connection therebetween, and other configurations (reference numeral 1). ˜11, 20-22) are shown in the conventional block diagram of FIG.
[0033]
Next, four adjacent configurations among the power distributor, the first delay device, the first power combiner, the second delay device, the second power combiner, the directional coupler, and the isolator are integrated. The case will be described as the fourteenth to sixteenth embodiments with reference to the configuration example diagrams of FIGS. 18 to 20 show a state in which the terminal resistance is integrated, it may not be integrated.
[0034]
As shown in FIG. 18, the distortion compensation amplifier according to the fourteenth embodiment of the present invention includes a power divider, a first delay unit, a first power combiner, and a second distortion elimination circuit in the distortion detection circuit. The second delay device 50 integrated with the first power combiner integrated with the first delay device 57 integrated with the integrated power distributor 56. The connector and the coaxial cable for connecting between them are unnecessary, and other configurations (reference numerals 1, 3 to 5, 8 to 10, 12 to 14, 20 to 22) are the conventional configuration diagram of FIG. It is shown in.
[0035]
As shown in FIG. 19, the distortion compensation amplifier according to the fifteenth embodiment of the present invention includes a first delay unit, a first power combiner in the distortion detection circuit, and a second delay unit in the distortion removal circuit. The second power combiner is integrated with the integrated first delay device 57 and the first power combiner 58 integrated with the integrated second delay device 50. The second power combiner 51 is configured with a connector and a coaxial cable for connection therebetween, and other configurations (reference numerals 1 to 5, 8 to 10, 13 to 14, and 20 to 22) are illustrated. FIG. 5 is a diagram illustrating a conventional configuration.
[0036]
As shown in FIG. 20, the distortion compensation amplifier according to the sixteenth embodiment of the present invention has a directional coupling between the first power combiner, the second delay unit, and the second power combiner in the distortion removal circuit. The directional coupler 52 integrated with the second power combiner 51 integrated with the second delay unit 50 integrated with the integrated first power combiner 58. The connector and the coaxial cable for connecting between them are unnecessary, and other configurations (reference numerals 1 to 6, 8 to 10, 14, 20 to 22) are shown in the conventional configuration diagram of FIG. Is.
[0037]
The configuration in which the second delay device, the second power combiner, the directional coupler, and the isolator in the distortion removal circuit are integrated is the first embodiment shown in FIG.
[0038]
Next, the adjacent five components of the power distributor, the first delay device, the first power combiner, the second delay device, the second power combiner, the directional coupler, and the isolator are integrated. The case will be described as the seventeenth to nineteenth embodiments with reference to the configuration example diagrams of FIGS. 21 to 23 show a state in which the termination resistors are integrated, but they may not be integrated.
[0039]
As shown in FIG. 21, the distortion compensation amplifier according to the seventeenth embodiment of the present invention includes a power divider, a first delay unit, a first power combiner, and a second distortion elimination circuit in the distortion detection circuit. The first power combiner integrated with the first delay unit 57 integrated with the integrated power divider 56 is integrated with the second power combiner. The second power combiner 51 integrated with the second delay unit 50 eliminates the need for a connector and a coaxial cable for connection therebetween, and other configurations (reference numerals 1, 3 to 5, 8 to 10, 13 to 14, 20 to 22) are shown in the conventional configuration diagram of FIG. 5.
[0040]
As shown in FIG. 22, the distortion compensation amplifier according to the eighteenth embodiment of the present invention includes a first delay unit, a first power combiner in the distortion detection circuit, and a second delay unit in the distortion removal circuit. The second power combiner and the directional coupler are integrated, and the second delay unit 50 integrated with the first power combiner 58 integrated with the integrated first delay unit 57. The second power combiner 51 integrated with the directional coupler 52 integrated with the connector, the connector and the coaxial cable for connecting between them are unnecessary, and other configurations (reference numerals 1 to 5) 8-10, 14, 20-22) are shown in the conventional block diagram of FIG.
[0041]
As shown in FIG. 23, the distortion compensating amplifier according to the nineteenth embodiment of the present invention includes a first power combiner in the distortion detection circuit, a second delay unit and a second power combiner in the distortion removal circuit. And the directional coupler and the isolator are integrated with the integrated first delay device 57 and the first power combiner 58 integrated with the integrated second delay device 50. The directional coupler 52 integrated with the second power combiner 51 and the isolator 53 integrated with the second power combiner 51 eliminate the need for a connector and a coaxial cable for connection therebetween, and other configurations (reference numerals) 1 to 6, 8 to 10, 20 to 22) are shown in the conventional block diagram of FIG.
[0042]
Next, six adjacent configurations of the power distributor, the first delay device, the first power combiner, the second delay device, the second power combiner, the directional coupler, and the isolator are integrated. The case will be described as a twentieth embodiment and a twenty-first embodiment with reference to the configuration example diagrams of FIGS. 24 and 25 show a state in which the termination resistors are integrated, but they may not be integrated.
[0043]
As shown in FIG. 24, the distortion compensation amplifier according to the twentieth embodiment of the present invention includes a power divider, a first delay unit, a first power combiner, and a second distortion elimination circuit in the distortion detection circuit. The first power combiner integrated with the first delay unit 57 integrated with the integrated power distributor 56 by integrating the delay unit, the second power combiner and the directional coupler A second delay unit 50 integrated with the transmitter, a second power combiner 51 integrated with the directional coupler 52, and a connector and a coaxial cable for connecting between them. The other configurations (reference numerals 1, 3 to 5, 8 to 10, 14, and 20 to 22) are those shown in the conventional configuration diagram of FIG.
[0044]
As shown in FIG. 25, the distortion compensation amplifier according to the twenty-first embodiment of the present invention includes a first delay unit, a first power combiner in the distortion detection circuit, and a second delay unit in the distortion removal circuit. The second power combiner, the directional coupler, and the isolator are integrated, and the second delay integrated with the first power combiner 58 integrated with the integrated first delay unit 57. The second power combiner 51 integrated with the device 50, the directional coupler 52 integrated with the isolator 53 and the isolator 53 integrated with each other, eliminating the need for a connector and a coaxial cable for connecting between them, Other configurations (reference numerals 1 to 5, 8 to 10 and 20 to 22) are those shown in the conventional configuration diagram of FIG.
[0045]
Next, a configuration that integrates all seven configurations of the power divider, the first delay device, the first power combiner, the second delay device, the second power combiner, the directional coupler, and the isolator is as follows. This is the second embodiment shown in FIG.
[0046]
【The invention's effect】
  As described above, according to the present inventionFeed forwardAccording to the distortion compensation amplifier,The second delay device is a cavity resonator filter, and has a room for separating and shielding the second delay device and the second power combiner, and the second delay device, the second power combiner, Because it is a feedforward distortion compensation amplifier with a shield case that housesThe following effects can be obtained. First, power loss due to connectors and coaxial cables can be reduced. Secondly, the cost of the connector and the coaxial cable can be reduced. Third, the space between the connector and the coaxial cable and the work space for connecting the connector and the coaxial cable are not required, and the structure can be simplified and downsized. Fourth, because of the integrated structure, material costs and assembly man-hours can be reduced. Fifth, the power distributor, power combiner, and directional coupler can be made simple and have good characteristics, and can be adjusted easily. Sixth, variations in delay due to variations in coaxial cable length can be suppressed.
[Brief description of the drawings]
FIG. 1 is a configuration example diagram of a first embodiment of a distortion compensation amplifier according to the present invention;
FIG. 2 is a comparative example of configurations of the present invention and a conventional distortion compensation amplifier.
FIG. 3 is an example of an integrated structure of a distortion compensating amplifier according to the present invention.
FIG. 4 is a configuration example diagram of a second embodiment of a distortion compensation amplifier according to the present invention.
FIG. 5 is a diagram illustrating a configuration example of a conventional distortion compensation amplifier.
FIG. 6 is a configuration example of a power distributor, a power combiner, and a directional coupler in a conventional distortion compensation amplifier.
FIG. 7 is a structural example diagram of a third embodiment of a distortion compensating amplifier according to the present invention;
FIG. 8 is a diagram illustrating a configuration example of a fourth embodiment of a distortion compensating amplifier according to the present invention.
FIG. 9 is a structural example diagram of a fifth embodiment of a distortion compensating amplifier according to the present invention;
FIG. 10 is a configuration diagram of a sixth embodiment of a distortion compensating amplifier according to the present invention.
FIG. 11 is a configuration example diagram of a seventh embodiment of a distortion compensating amplifier according to the present invention.
FIG. 12 is a structural example diagram of an eighth embodiment of a distortion compensation amplifier according to the present invention;
FIG. 13 is a structural example diagram of a ninth embodiment of a distortion compensating amplifier according to the present invention;
FIG. 14 is a diagram showing a configuration example of a tenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 15 is a structural example diagram of an eleventh embodiment of a distortion compensation amplifier according to the present invention;
FIG. 16 is a diagram showing a configuration example of a twelfth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 17 is a diagram showing a configuration example of a thirteenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 18 is a diagram showing a configuration example of a fourteenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 19 is a diagram showing a configuration example of a fifteenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 20 is a diagram showing a configuration example of a sixteenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 21 is a diagram showing a configuration example of a seventeenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 22 is a diagram showing a configuration example of an eighteenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 23 is a diagram showing a configuration example of a nineteenth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 24 is a diagram showing a configuration example of a twentieth embodiment of a distortion compensation amplifier according to the present invention.
FIG. 25 is a diagram showing a configuration example of a twenty-first embodiment of a distortion compensating amplifier according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Input terminal, 2 ... Power divider, 3, 8 ... Variable attenuator, 4, 9 ... Variable phase shifter, 5 ... Main amplifier, 6 ... Delay line, 7, 12 ... Power combiner, 10 ... Auxiliary amplifier, DESCRIPTION OF SYMBOLS 11 ... Delay filter, 13 ... Directional coupler, 14, 68 ... Isolator, 15, 16 ... Terminating resistor, 17, 18, 19 ... Coaxial cable, 20, 67 ... Output terminal, 21, 66 ... Monitor terminal, 22 ... Connector, 50, 57 ... integrated delay filter, 51, 58, 70 ... integrated power combiner, 52, 71 ... integrated directional coupler, 53, 68 ... integrated isolator, 54, 55 ... Integrated termination resistor, 56 ... Integrated power divider, 61 ... Delay filter input terminal, 62 ... Cavity resonator filter, 63 ... Insulator, 64, 65 ... Shield Subisu stopped terminations resistor, 69 ... shield case, 72 ... power synthesizer input terminal

Claims (5)

An input signal is distributed by a power distributor, and one output is amplified by a main amplifier via a first variable attenuator and a first variable phase shifter, and the other output distributed from the power distributor A distortion detection circuit for detecting a distortion component generated in the main amplifier by synthesizing a signal whose timing is adjusted by a first delay unit by a first power combiner, and an output from the first power combiner A signal obtained by amplifying the distortion component by an auxiliary amplifier via a second variable attenuator and a second variable phase shifter and a signal amplified by a main amplifier output from the first power combiner The signal with the timing matched by the delay device of 2 is reversed-phase synthesized by the second power combiner to cancel the distortion component, the monitor output is obtained by the directional coupler, and the unidirectionality is improved by the isolator. Equipped with a distortion removal circuit that obtains power combined output In that feed-forward distortion compensation amplifier,
The second delay is a cavity resonator filter;
A shield case that separates and shields the second delay unit and the second power combiner, and that integrally stores the second delay unit and the second power combiner; A feedforward distortion compensating amplifier. The shield case forms a cavity of the cavity resonator filter and has a room for separating and shielding the directional coupler and the isolator, and the directional coupler, the isolator, and the second power combiner 2. The feedforward distortion compensating amplifier according to claim 1 , wherein the termination resistor and the termination resistor of the directional coupler are integrally stored . A distortion compensation amplifier that amplifies a signal of 2 GHz band,
The junction between the second delay device and the second power combiner is insulated by the shield case and Teflon,
3. The feedforward distortion compensation amplifier according to claim 2 , wherein the directional coupler is a directional coupler that performs coupling by means of conductor wires arranged close to each other in air . An input signal is distributed by a power distributor, and one output is amplified by a main amplifier via a first variable attenuator and a first variable phase shifter, and the other output distributed from the power distributor A distortion detection circuit for detecting a distortion component generated in the main amplifier by synthesizing a signal whose timing is adjusted by a first delay unit by a first power combiner, and an output from the first power combiner A signal obtained by amplifying the distortion component by an auxiliary amplifier via a second variable attenuator and a second variable phase shifter and a signal amplified by a main amplifier output from the first power combiner The signal with the timing matched by the delay device of 2 is reversed-phase synthesized by the second power combiner to cancel the distortion component, the monitor output is obtained by the directional coupler, and the unidirectionality is improved by the isolator. Equipped with a distortion removal circuit that obtains power combined output In that feed-forward distortion compensation amplifier,
The second power combiner, the directional coupler, and the isolator are separated and shielded, and the second power combiner, the directional coupler, and the isolator are integrally stored. A feedforward distortion compensation amplifier comprising a shield case that performs the above operation . An input signal is distributed by a power distributor, and one output is amplified by a main amplifier via a first variable attenuator and a first variable phase shifter, and the other output distributed from the power distributor A distortion detection circuit for detecting a distortion component generated in the main amplifier by synthesizing a signal whose timing is adjusted by a first delay unit by a first power combiner, and an output from the first power combiner A signal obtained by amplifying the distortion component by an auxiliary amplifier via a second variable attenuator and a second variable phase shifter and a signal amplified by a main amplifier output from the first power combiner The signal with the timing matched by the delay device of 2 is reversed-phase synthesized by the second power combiner to cancel the distortion component, the monitor output is obtained by the directional coupler, and the unidirectionality is improved by the isolator. Equipped with a distortion removal circuit that obtains power combined output In that feed-forward distortion compensation amplifier,
The first delay device and the second delay device are cavity resonator filters;
The power distributor, the first delay device, the first power combiner, the second delay device, and the second power combiner are separated and shielded, and the power distributor, A feed case comprising: a shield case that integrally accommodates the first delay unit, the first power combiner, the second delay unit, and the second power combiner; Forward distortion compensation amplifier.

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