JP6526385B2 - Amplification apparatus and amplification method - Google Patents

Description

  The present invention relates to an amplification device and an amplification method.

  Many electric devices are equipped with a blower such as a heat dissipating fan for heat dissipation and the like. As a blower of this type, a blower with good controllability is required which can be ventilated with an optimum air volume without being affected by changes in pressure loss. In response to such demands, air volume-static pressure characteristics are realized with a small change in air volume even if static pressure such as pressure loss changes, air flow is increased if the ambient temperature is high, and air flow is low An air blower capable of reducing the air pressure has been proposed (see Patent Document 1).

JP, 2009-144635, A

The high power amplifier used for the final stage (output stage) of the RF (high frequency) circuit of the satellite communication system generates a large amount of heat during operation depending on the efficiency of the component in the high frequency range. Also in this case, heat dissipation is performed by an air cooling method using a blower.
It is conceivable to use the blower described in Patent Document 1 for this type of heat dissipation. However, since the air blower described in Patent Document 1 only adjusts the air volume according to the ambient temperature, the air volume of the air blower becomes excessive compared to heat generation depending on the operation mode, and noise caused by the rotation of the fan (Wind noise) may be a problem. Therefore, there is a need for a method of controlling the fan with an appropriate air volume according to the amount of heat generation.

  The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an amplification device and an amplification method capable of operating a blower with an appropriate air volume.

In order to achieve the above object, according to the present invention, an input unit is amplified by an amplification unit, and a blowing unit blows air to cool the amplification unit, a temperature detection unit detects a temperature of the amplification unit, and the amplification unit The power detection unit detects the power of the output signal of each of the plurality of powers with temperature as an index in association with the required air volume for each of three combinations of the detected temperature, the detected power, and the frequency of the input signal And the control unit selects the two-dimensional table corresponding to the temperature detected by the temperature detection unit from the two-dimensional table based on the combination of the plurality of frequencies, and the power detection unit detects the selected two-dimensional table. wherein the required air volume corresponding to the combination of the frequency of the power and the input signal of the amplifier unit, as the air volume required for cooling the air flow, said control unit is adjusted by controlling the blowing section To.

  According to the present invention, the air volume of the blower is obtained based on the temperature of the amplifier, the power of the amplified signal, and the frequency. Therefore, the blower can be driven to obtain an appropriate air flow according to the amount of heat generation. Thereby, while suppressing the excessive temperature rise of an amplification part, an excessive ventilation can be suppressed and reduction of a ventilation noise is attained.

It is a block diagram of the high output amplification apparatus based on Embodiment 1 of this invention. It is a block diagram which shows the detail of the amplifier part of the high output amplifier shown in FIG. It is a functional block diagram of a control part shown in FIG. It is a figure which shows an example of the table matrix used by the required air volume calculation part shown in FIG. It is a functional block diagram of the control signal generation part shown in FIG. (A)-(c) is a timing chart which shows the example of PWM pulse S1 produced | generated by the control signal production | generation part shown in FIG. It is a functional block diagram of the control part concerning Embodiment 2 of the present invention. FIG. 7 is a functional block diagram of a power supply unit according to Embodiment 2. It is a block diagram of the high output amplification apparatus based on Embodiment 3 of this invention. It is a functional block diagram of the control part concerning Embodiment 3 of the present invention. It is a functional block diagram of the control part concerning Embodiment 4 of this invention.

  Hereinafter, an amplification device according to an embodiment of the present invention will be described with reference to the drawings. The amplification device according to each embodiment adjusts the air volume of the blower in accordance with the calorific value.

Embodiment 1
Hereinafter, the amplification apparatus according to the first embodiment of the present invention will be described using a high-power amplification apparatus as an example.

  The high-power amplification device 100 of the present embodiment is for amplifying the output of an RF (Radio Frequency: high frequency) signal, and the amplification efficiency thereof fluctuates according to the frequency of the RF signal to be amplified. The high-power amplification device 100 has a function of appropriately controlling the blowing air volume of the blowing unit (fan) according to the amount of generated heat that fluctuates with the change of the frequency of the RF signal.

  As shown in FIG. 1, the high power amplification device 100 transmits an RF input signal Ti to which an RF input signal Si to be amplified is input and the RF input signal Si to the amplification unit 3 and detects a part of the power as well. Divider (H) 2 transmitted to unit 5, amplification unit 3 for amplifying RF input signal Si transmitted via divider 2, and the RF signal output from amplification unit 3 to output terminal To A directional coupler 4 for transmitting a part of the signal to the power detection unit 5 and an output terminal To are provided.

  An RF input signal Si to be amplified is input to the RF signal input terminal Ti. The RF input signal Si includes an RF signal supplied from the outside and an RF signal from the frequency conversion unit 1 described later.

  The distributor 2 transmits a part of the RF input signal Si supplied via the RF signal input terminal Ti, for example, 0.1% or less to the power detection unit 5 and transmits the remaining part to the amplification unit 3.

  The amplification unit 3 is means for amplifying and outputting an input signal, and in the present embodiment, the amplification unit 3 amplifies and outputs so that the amplitude of the RF output signal So becomes a predetermined level. The amplification efficiency of the amplification unit 3 fluctuates according to the frequency of the RF input signal Si to be amplified. The amplification unit 3 generates heat according to its amplification efficiency. In order to dissipate the heat generated by the amplification unit 3, a fan 8 described later is disposed. The details of the amplification unit 3 will be described later with reference to FIG.

  The directional coupler 4 transmits a part, for example, 0.1% or less of the output signal of the amplification unit 3 to the power detection unit 5, and transmits the remainder to the output terminal To.

  The output terminal To supplies the RF output signal So output from the directional coupler 4 to an external circuit such as an antenna.

  The high-power amplification device 100 further receives an IF (intermediate frequency) signal to be amplified, frequency-converts this into an RF signal, and supplies the signal to the amplification unit 3 via the input terminal Ti (or directly). Part 1 can be provided.

  The high-power amplification device 100 further includes a power detection unit 5 that detects input power and output power of the amplification unit 3, a control unit 6 that controls the whole, a power supply unit 7 that supplies operating power to each unit, and the amplification unit 3. A fan 8 for cooling and a display unit 10 for displaying data are provided.

  The power detection unit 5 detects the input power Pi and the output power Po of the amplification unit 3, and transmits power information Sb indicating the detected input power Pi and output power Po to the control unit 6. The input power Pi means the power of the RF signal to be amplified input to the amplification unit 3, and the output power Po means the power of the amplified RF signal output from the amplification unit 3.

  The control unit 6 is configured of a processor or the like, and controls each unit constituting the high-power amplification device 100. The control unit 6 stores calculation parameters for adjusting the air volume of the fan 8 in the internal memory. The control unit 6 also displays the device status, control results, and the like on the display unit 10. The control unit 6 also responds to remote monitoring control from the outside.

  The power supply unit 7 receives an AC (AC) input and supplies necessary power (power supply) to each unit.

  The fan 8 is a blower that functions as a blower for blowing air to cool the amplification unit 3, and by discharging the air in the casing of the high-power amplification device 100, the heat in the casing, in particular, the amplification unit 3. Heat the heat generated by

  The display unit 10 is configured of a liquid crystal display device or the like, and displays various information according to the control of the control unit 6.

  Next, the details of the amplification unit 3 will be described with reference to FIG.

  As illustrated, the amplification unit 3 includes a distributor 31 for distributing an input signal to a plurality of FET systems, FET systems 32 and 33 for amplifying the signal distributed by the distributor 31, and FET systems 32 and 33. And a combiner 34 for combining the amplified signals.

  The amplification unit 3 further includes a temperature detection unit 37 that detects the temperature of the FET systems 32 and 33.

  The distributor 31 distributes the input RF input signal Si to be amplified to a plurality of FET systems. In the example of FIG. 2, two FET systems 32 and 33 are supplied.

  The FET system 32 includes a variable attenuator (VATT) 325 for suppressing excessive amplification, and amplification elements 321 to 324 connected in a plurality of stages. Similarly, the FET system 33 includes a variable attenuator 335 for suppressing excessive amplification, and amplification elements 331 to 334 connected in a plurality of stages. Each of the amplification elements 321 to 324 and 331 to 334 is formed of an FET (field effect transistor). If the output power becomes too high, the variable attenuator (VATT) 325 attenuates the signal to reduce the signal input to the first stage FET. If the output power is too low, then the attenuation factor of the signal at variable attenuator (VATT) 325 is reduced.

  The combiner 34 combines the signals amplified by the FET systems 32 and 33 and outputs the combined signal to the directional coupler 4.

  The temperature detection unit 37 detects the temperature of the amplification unit 3, specifically, the temperatures of the FET systems 32 and 33. In the present embodiment, the temperature detection unit 37 detects the temperatures of the amplification elements 324 and 334 in the final stage, which have the highest temperature, calculates the average value of them, and controls the temperature information Sa indicating the calculated average value. To communicate. The detection of the temperature may be performed at one place or plural places.

Next, the details of the control unit 6 will be described with reference to FIG.
As illustrated, the control unit 6 includes a frequency information holding unit 61, a required air volume calculation unit 62, and an air volume adjustment unit 63.

  The frequency information holding unit 61 holds frequency information Se indicating the frequency of the RF input signal Si to be amplified (the frequency of the carrier signal). The frequency information Se may be information provided from the transmission source of the RF input signal Si, information detected by itself by frequency analysis or the like, or a fixed value.

  The required air volume calculation unit 62 functions as an air volume calculation unit for obtaining the air volume of the fan 8 necessary to cool the amplification unit 3, and the temperature T indicated by the temperature information Sa input from the temperature detection unit 37 From the output power Po indicated by the input power information Sb and the frequency f indicated by the frequency information Se held by the frequency information holding unit 61, the required air volume Qreq of the fan 8 necessary for cooling the high-power amplification device 100 is calculated.

  In the present embodiment, the required air volume calculation unit 62 uses the table matrix illustrated in FIG. 4 to calculate the required air volume Qreq.

  This table matrix is obtained in advance by experiments etc., and is based on the temperature T of the amplifier 3, the power (output power) Po of the output signal of the amplifier 3, and the frequency f of the RF input signal Si. This is a table for determining the air volume of the fan 8 required to properly cool the amplification unit 3 (not overheat and not overcool it). This table matrix is a three-dimensional matrix whose specifications are the temperature T of the amplification unit 3 indicated by the temperature information Sa, the output power Po indicated by the power information Sb, and the frequency f of the RF input signal Si indicated by the frequency information Se. It has become. An amplification element (FET or the like) that performs power amplification has a characteristic that the gain changes with temperature T and frequency f. The table matrix is intended to correct the fluctuation of the required air volume Qreq based on these. This table matrix selects a two-dimensional table using the temperature T indicated by the temperature information Sa as an index, and a value Qnm specified by the output power Po indicated by the power information Sb and the frequency f indicated by the frequency information Se on the two-dimensional table. The required air volume Qreq of the fan 8 is obtained by referring to FIG.

  The table matrix may be created for each of the high power amplification devices 100, and the same table matrix may be used for the high power amplification devices 100 of the same standard.

An example of a method of creating a table matrix will be described.
First, a combination of the frequency (carrier frequency) f of the RF signal that may be input to the amplification unit 3 and the power (output power) Po of the RF signal after amplification is set.

  Next, the high power amplification device 100 is actually operated at ambient temperature (without using a constant temperature bath or the like), and the combination of the output power Po and the frequency f is the final of the FET systems 32, 33 at that time. The temperature T of the amplification elements 324 and 334 of the stage is determined by the temperature detection unit 37, and the air volume of the fan 8 is measured by an air flow meter and written in a two-dimensional table. This is because the data that can be measured in the thermostatic chamber is limited, so that the data to be the reference is measured in the ambient temperature.

  Subsequently, the required air volume is determined for each combination of the average temperature T of the amplification elements 324 and 334 at the final stage, the frequency f of the RF signal, and the output power Po. First, based on the operating characteristics of the final stage amplifying elements 324 and 334, a threshold temperature TL at which the output is cut off (operation cut off) is set as a reference when the temperature continues to be exceeded for a certain time. The threshold temperature TL is set with a certain margin.

  Next, the temperature T, the frequency f, and the output power Po are set using the values written in the two-dimensional table in the previous processing as initial values, and the operation is actually performed, and the amplification elements 324 and 334 of the final stage are operated. The minimum air volume of the fan 8 whose temperature does not exceed the threshold temperature TL is determined as the required air volume Qreq. The required air volume Qreq obtained is written at the position specified by the corresponding output power Po and frequency f on the two-dimensional table. The two-dimensional table created here is an initial table of the required air volume Qreq.

Next, the high power amplification device 100 is installed in a constant temperature bath, and the temperature in the constant temperature bath is set to the same temperature as the ambient temperature of the high power amplification device 100 in the actual use environment.
Similarly, the output power Po and the frequency f are set in the thermostatic chamber, and the minimum air volume Qreq in which the temperature T of the amplification elements 324 and 334 in the final stage does not exceed the temperature threshold TL is determined as the required air volume.
The time and cost required for the experiment can be reduced by finely adjusting the initial value by using the required air volume Qreq previously obtained as the initial value of the experiment.

  The set temperature T of the amplification elements 324 and 334 at the final stage is changed, and this operation is repeated to create a table matrix. When the conditions of the output power Po, the frequency f, and the temperature T are discretely measured, it is possible to create a table by obtaining an intermediate value on each axis by linear interpolation.

  It is also possible to use a common table matrix among the plurality of high power amplifiers 100 if the variation is small.

  The air volume adjustment unit 63 shown in FIG. 3 functions as an adjustment unit that adjusts the air volume of the fan 8 that functions as a blower, and the rotation of the fan 8 necessary to obtain the required air volume Qreq obtained by the required air volume calculation unit 62. Control of the calculated duty ratio (drive of the rotational speed calculator 631 for obtaining the speed, the duty ratio calculator 632 for obtaining the duty ratio of PWM (pulse width modulation signal) applied to the fan 8 to obtain the obtained rotational speed And a control signal generator 633 for applying a signal to the fan 8.

  The rotational speed calculation unit 631 converts the required air volume Qreq calculated by the required air volume calculation unit 62 into the required rotational speed Rreq of the fan 8 which is the rotational speed of the fan 8 necessary. The conversion can be performed by referring to a table that defines the relationship between the required air volume Qreq and the required rotational speed Rreq. The table can be created by data acquisition through prior experiments and the like.

  The duty ratio calculation unit 632 converts the required rotation speed Rreq of the fan 8 calculated by the rotation speed calculation unit 631 into a duty ratio Dreq of a drive signal to be applied to the fan 8 in order to obtain the rotation speed. The conversion can be performed by referring to a table that defines the relationship between the required rotational speed Rreq and the duty ratio Dreq. The table can be created by acquiring data in advance by experiments or the like.

  As shown in FIG. 5, the control signal generation unit 633 includes a reference clock 6331 and a timer IC (Integrated Circuit) 6332, and generates a PWM pulse S1 according to the duty ratio Dreq calculated by the duty ratio calculation unit 632. . FIGS. 6A to 6C show examples of the PWM pulse S1. (A) shows a waveform in which the PWM pulse S1 is continuously output as a duty ratio: 25%, (b) a duty ratio: 50%, and (c) a duty ratio: 100%.

  The PWM pulse S1 generated by the control signal generation unit 633 is supplied to the fan 8 shown in FIGS. 1 and 2, whereby the fan 8 is required for cooling the high-power amplification device 100 (particularly, the amplification unit 3). Supply the air volume Qreq.

Next, the operation of the high power amplification device 100 having the above configuration will be described.
The RF input signal Si input to the RF signal input terminal Ti is amplified by the amplification unit 3 through the distributor 2 and output from the output terminal To through the directional coupler 4 to an external circuit such as an antenna Ru.
During this time, the power detection unit 5 obtains the output power Po of the RF input signal Si amplified by the amplification unit 3, and outputs the power signal Sb indicating the obtained output power Po to the control unit 6.

Further, the temperature detection unit 37 in the amplification unit 3 obtains the average temperature T of the final-stage amplification elements 324 and 334 at the highest temperature of the FET systems 32 and 33, and controls the temperature signal Sa indicating the obtained average temperature T Supply to section 6.
Further, the control unit 6 stores frequency information Se indicating the frequency f (carrier frequency) of the RF input signal Si in the frequency information holding unit 61.

  The required air volume calculation unit 62 of the control unit 6 applies the temperature T indicated by the temperature information Sa, the output power Po indicated by the power information Sb, and the frequency f indicated by the frequency information Se to the table matrix stored therein. Read out the corresponding required air volume Qreq. Specifically, using the temperature T indicated by the temperature signal Sa as an index, one two-dimensional table is selected from the table matrix stored inside, and the output indicated by the power information Sb on the selected two-dimensional table The value Qnm at the intersection of the power Po and the frequency f indicated by the frequency information Se is read out. For example, assuming that the temperature (average temperature of the amplification elements 324 and 334) indicated by the temperature information Sa output from the temperature information detection unit 37 is T1, the two-dimensional table shown in FIG. 4 is referred to using T1 as an index. Here, assuming that the frequency f (the frequency of the input signal of the amplification unit 3) indicated by the frequency information Se is f1 and the output power Po indicated by the power information Sb is Po2, the intersection of f1 and Po2 as the required air volume Qreq. The position Q12 is read out.

  The rotational speed calculation unit 631 of the control unit 6 converts the obtained required air volume Qreq into the required rotational speed Rreq of the fan 8. The duty ratio calculation unit 632 obtains the duty ratio Dreq of the control signal (PWM pulse S1) applied to the fan 8 in order to obtain the required rotational speed Rreq. Furthermore, the control signal generation unit 633 generates a PWM pulse S1 having the determined duty ratio Dreq, applies it to the fan 8, and rotates the fan 8.

  The fan 8 dissipates heat by blowing and ventilating the high-power amplification device 100 and prevents the high-power amplification device 100 from being heated.

  As described above, according to the present embodiment, the required air volume Qreq is determined based on the frequency f of the signal to be amplified, the output power Po of the signal after amplification, and the temperature T of the amplification unit 3 at that time. The fan 8 is controlled to obtain the required air volume Qreq. Therefore, while suppressing the excessive temperature rise of the amplification part 3, it is possible to suppress the excessive air flow. Thereby, the noise (wind noise) resulting from the rotation of the fan 8 can be suppressed.

  In the first embodiment, the power detection unit 5 measures both the input power Pi of the RF input signal Si of the amplification unit 3 and the output power Po of the output signal of the amplification unit 3, and controls the rotational speed of the fan 8. Used the power Po. The present invention is not limited to this, and the required air volume Qreq may be determined based on both of the measured powers Pi and Po. In this case, the table matrix may be a three-dimensional matrix in which a gain G which is a difference between the temperature T, the frequency f, the input power Pi, and the output power Po is used as a specification.

  In the first embodiment, the temperature detection unit 37 obtains the average of the temperatures of the amplification elements 324 and 334 at the final stage of the FET systems 32 and 33, but may obtain the higher temperature or the like.

Embodiment 2
Subsequently, a second embodiment of the present invention will be described focusing on differences from the above-described first embodiment. In the first embodiment, an example is shown in which the effective value of the applied voltage is controlled by controlling the duty of the PWM pulse for driving the fan 8, but in the second embodiment, the applied voltage itself is controlled.

  In the second embodiment, voltage control value S2 for specifying the voltage value of the power supply to fan 8 from control unit 6A to power supply unit 7A is transmitted, and power supply unit 7A applies to fan 8 according to voltage control value S2. By controlling the voltage S3, the required air flow Qreq of the fan 8 necessary for cooling the high-power amplification device 100 is supplied from the fan 8.

  FIG. 7 shows the details of the control unit 6A in the second embodiment. The frequency information holding unit 61 and the required air volume calculation unit 62 are the same as in the first embodiment.

  Air volume adjustment unit 63A in the second embodiment includes rotational speed calculation unit 631, supply voltage calculation unit 634, and control signal generation unit 635. The rotational speed calculator 631 is the same as that of the first embodiment.

  The supply voltage calculation unit 634 converts the required rotation speed Rreq of the fan 8 calculated by the rotation speed calculation unit 631 into a fan supply voltage Vreq that is a voltage to be applied to the fan 8 to obtain the rotation speed. The conversion can be performed by referring to a table that defines the relationship between the required rotational speed Rreq and the fan supply voltage Vreq. This table can be created by acquiring data in advance by experiments or the like. This table is a one-dimensional conversion table.

  The control signal generation unit 635 outputs a voltage control value S2 necessary for voltage control of the power supply unit 7 based on the fan supply voltage Vreq calculated by the supply voltage calculation unit 634.

  FIG. 8 shows the details of the power supply unit 7A. The power supply unit 7A has a reference power supply 71 and a power supply IC 72, and outputs a fan supply voltage S3 based on the voltage control value S2.

  The fan 8 supplies the required air volume Qreq necessary for cooling the high-power amplification device 100 by the fan supply voltage S3 received from the power supply unit 7.

Third Embodiment
The configuration of the high-power amplification device 100A according to the third embodiment is shown in FIG. As shown, the high-power amplification device 100A has the same basic configuration as the high-power amplification device 100 according to the first embodiment shown in FIG. 1, but detects the air volume to measure the volume of cooling air generated by the fan 8. It differs in the point provided with the part 9.

  Furthermore, in the third embodiment, the air volume detection unit 9 detects the air volume of the cooling air generated by the fan 8, and transmits the air volume information Sc indicating the detected air volume to the control unit 6B. The control unit 6B calculates the corrected fan air volume QreqA based on the difference ε between the required air volume Qreq required for cooling the high-power amplification device 100A and the actual air volume Qd indicated by the air volume information Sc, and corrects the fan air volume QreqA. The fan 8 is controlled based on the duty ratio Dreq calculated from

  FIG. 10 shows details of the control unit 6B in the third embodiment. The control unit 6B includes a frequency information holding unit 61, a required air volume calculating unit 62, a correction value calculating unit 64, and an air volume adjusting unit 63. The frequency information holding unit 61, the required air volume calculating unit 62, and the air volume adjusting unit 63 are the same as in the first embodiment.

  The correction value calculation unit 64 obtains the difference ε between the required air volume Qreq calculated by the required air volume calculator 62 and the actual air volume Qd indicated by the air volume information Sc input from the air volume detector 9, and corrects the fan air volume QreqA That is, the corrected air volume is calculated. The update cycle is about 100 msec. The correction value calculation unit 64 holds the fan air volume QreqA after correction when the difference ε becomes zero.

Qreq (0) = Qreq (output of required air volume calculation unit 62)
Qreq (n + 1) = Qreq (n) + α {Qreq (0) − (air volume Qd indicated by air volume information Sc)}
QreqA = Qreq (n + 1)

  If the difference ε is generated again because the temperature T, the power Po, the frequency f change, etc., the required air volume calculation unit 62 recalculates the required air volume Qreq, and recalculates using the above equation, and the difference is again Holds the value when it reaches zero.

  The rotational speed calculation unit 631 calculates the required rotational speed Rreq of the fan 8 based on the corrected fan air volume QreqA calculated by the correction value calculation unit 64.

  By using the fan air volume QreqA after correction, it becomes possible to more accurately supply the air volume necessary for cooling the high-power amplification device 100A from the fan 8 even when the air volume decreases due to aging.

  The method of correcting the required air volume Qreq based on the actual measurement value of the air flow of the fan 8 is not limited to the above embodiment, and any method may be adopted.

Fourth Embodiment
The fourth embodiment corresponds to an application example of the second and third embodiments, calculates the fan air volume QreqA corrected based on the difference ε between the required air volume Qreq and the actual air volume Qd, and calculates the fan air volume QreqA from the fan air volume QreqA. Supply voltage Vreq is applied to fan 8. The fourth embodiment will be described below focusing on the differences with the second and third embodiments.

  FIG. 11 shows the details of the control unit 6C in the fourth embodiment. The control unit 6C includes a frequency information holding unit 61, a required air volume calculation unit 62, a correction value calculation unit 64, and an air volume adjustment unit 63. The frequency information holding unit 61, the required air volume calculating unit 62, and the air volume adjusting unit 63A are the same as in the second embodiment.

  The correction value calculation unit 64 has the same configuration as that of the third embodiment, and calculates the corrected fan air volume QreqA in the same manner as the third embodiment.

  The rotational speed calculation unit 631 calculates the required rotational speed Rreq of the fan 8 based on the corrected fan air volume QreqA calculated by the correction value calculation unit 64.

  By using the fan air volume QreqA after correction, it becomes possible to more accurately supply the air volume necessary for cooling the high-power amplification device 100 from the fan 8 even when the air volume decreases due to aging.

  In the above embodiment, the present invention has been described by way of an example of a high power amplification apparatus for amplifying an RF input signal, but the type of amplification apparatus and the signal to be amplified are arbitrary. Further, although the amplification unit formed of the FET is illustrated, the amplification unit may be formed of another amplification element such as a bipolar transistor.

  The present invention is capable of various embodiments and modifications without departing from the broad spirit and scope of the present invention. In addition, the embodiment described above is for describing the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated not by the embodiments but by the claims. And, various modifications applied within the scope of the claims and the meaning of the invention are considered to be within the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 frequency conversion part, 2 distributor, 3 amplifier part, 4 directional coupler, 5 electric power detection part, 6, 6A, 6B, 6C control part, 7, 7A power supply part, 8 fans (air blower part), 9 air volume detection Parts, 10 display parts, 31 distributors, 32, 33 FET systems, 34 synthesizers, 37 temperature detection parts, 61 frequency information holding parts, 62 required air volume calculation parts, 63, 63 A air volume adjustment parts, 64 correction value calculation parts, 71 Reference Power Supply, 72 Power Supply IC, 100, 100A High Power Amplifier, 321, 322, 323, 324 Amplifier (FET), 325 VATT (Variable Attenuator), 331, 332, 333, 334 FET, 335 VATT (Variable Attenuator) 631 Rotational speed calculation unit 632 Duty ratio calculation unit 633 Control signal generation unit 634 Supply voltage calculation unit 635 Control signal generation unit 6 31 reference clock, 6332 timer IC.

Claims (5)

An amplification unit that amplifies an input signal;
An air blower for blowing air to cool the amplifier;
A temperature detection unit that detects the temperature of the amplification unit;
A power detection unit that detects the power of the output signal of the amplification unit;
The air flow for cooling the amplification unit, the required air volume specified for each of three combinations of the temperature detected by the temperature detection unit, the power detected by the power detection unit, and the frequency of the input signal of the amplification unit An air volume calculation unit to be determined as the air volume of the unit;
And an air volume adjusting unit for adjusting the air blowing unit so as to obtain the air volume calculated by the air volume calculating unit.
The air volume calculation unit
A table that associates the three combinations with the required air volume;
A reading unit which applies the temperature detected by the temperature detection unit, the power detected by the power detection unit, and the frequency of the input signal of the amplification unit to the table, and reads out the corresponding required air volume;
Equipped with
The table is a two-dimensional table of power and frequency using temperature as an index, the required air volume is specified for each combination of a plurality of power and a plurality of frequencies, and the reading unit is a temperature detection unit. The two-dimensional table corresponding to the detected temperature is selected, and the required air volume specified by the combination of the power detected by the power detection unit and the frequency of the input signal of the amplification unit is read out.
Amplifier. The air volume adjustment unit
A rotational speed calculation unit that calculates a required rotational speed of the blower unit based on the required air volume calculated by the air volume calculation unit;
A duty ratio calculation unit that calculates a duty ratio for operating the blower unit at the required rotational speed;
A control signal generation unit that generates a control signal having the duty ratio;
The amplification device according to claim 1, comprising: The air volume adjustment unit
A rotational speed calculation unit that calculates a required rotational speed of the blower unit based on the required air volume calculated by the air volume calculation unit;
A supply voltage calculation unit that calculates a supply voltage for operating the blower unit at the required rotation speed;
A control signal generation unit that generates a control signal for setting a power supply voltage of the blower unit to the supply voltage;
The amplification device according to claim 1, comprising: An air volume detection unit that detects an air volume of the blower unit;
A correction value calculation unit that calculates a corrected air volume based on a difference between the air volume calculated by the air volume calculation unit and the air volume detected by the air volume detection unit;
And have
The air volume adjusting unit adjusts the air blowing unit so as to obtain the corrected air volume calculated by the correction value calculating unit.
The amplification device according to any one of claims 1 to 3. The input signal is amplified by the amplification unit,
A blower blows the air to cool the amplifier,
A temperature detection unit detects the temperature of the amplification unit;
A power detection unit detects the power of the output signal of the amplification unit;
From the two-dimensional table , which is a combination of a plurality of powers and a plurality of frequencies, the temperature is used as an index in association with the required air volume for every three combinations of temperature, power, and frequency of the input signal. The two-dimensional table corresponding to the temperature detected by the temperature detection unit is selected, and the required corresponding to the combination of the power detected by the power detection unit and the frequency of the input signal of the amplification unit in the selected two-dimensional table The control unit adjusts the air volume for cooling the amplifier as the air volume necessary for cooling by controlling the air blower, and adjusting the air volume.
Amplification method.

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