CN107508644B - Feedback channel on-line calibration method and device - Google Patents
Feedback channel on-line calibration method and device Download PDFInfo
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- CN107508644B CN107508644B CN201610416867.4A CN201610416867A CN107508644B CN 107508644 B CN107508644 B CN 107508644B CN 201610416867 A CN201610416867 A CN 201610416867A CN 107508644 B CN107508644 B CN 107508644B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/08—Closed loop power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
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- H04B17/30—Monitoring; Testing of propagation channels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
- H04W52/226—TPC being performed according to specific parameters taking into account previous information or commands using past references to control power, e.g. look-up-table
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Abstract
The invention discloses a feedback channel on-line calibration method and a device thereof. The feedback channel online calibration method ensures the accuracy of the feedback channel power by accessing a constant reference power in the feedback link, further ensures the accuracy of the base station transmitting power, and can perform online temperature calibration on the base station transmitting channel, so that the transmitting power cannot change along with the aging of the base station, and the base station transmitting power can be kept accurate for a long time; meanwhile, the base station can finish temperature calibration at normal temperature without high and low temperature circulating experiments.
Description
Technical Field
The invention relates to the field of communication, in particular to a feedback channel online calibration method and a feedback channel online calibration device capable of improving the output power accuracy of a base station.
Background
In the base station, the output power of the antenna port changes with the frequency and temperature. Under the condition that the hardware structure of the circuit is not changed, the larger the frequency and temperature change is, the larger the gain change is, and after the gain change, the downlink of a base station can cause the reduction of the output power precision and influence the coverage area; for the uplink of the base station, the power detection precision is reduced, and the plastics of the uplink data service of the user are affected. Therefore, in order to ensure that the base station operates at different frequencies and different temperatures, the gain of each channel is kept constant, and power calibration is required.
The calibration of the output power of the base station mainly comprises frequency calibration and temperature calibration, and both the two calibration modes are realized by calibrating a feedback channel, namely, a power value read by the feedback channel is used as a power value converted to an antenna port, and a difference value between the power value read by the feedback channel and an actual power value transmitted by the base station is calibration data. Generally, in order to ensure the accuracy of the gain of the base station at normal temperature, frequency calibration needs to be performed first, that is, in the production process, calibration data of each base station at different frequencies are tested to obtain a set of calibration data, and then the calibration data are written into a memory of the base station for calling; when the environmental temperature changes, the gain characteristic of the base station also changes, which makes the calibration data in the base station not applicable any more, so that the temperature calibration is needed after the frequency calibration, i.e. the sample base station is subjected to high and low temperature tests to extract the calibration data, and the calibration data is written into the base station register for calling. However, due to the limitation of production conditions, it is impossible to calibrate each base station at all temperatures, and therefore, in order to ensure the accuracy of the frequency calibration value, the base station needs to be temperature compensated, and together with the frequency calibration table, compensation values suitable for different temperatures are obtained to ensure the output power of the base station to be constant.
In the temperature compensation scheme in the prior art, the temperature characteristic of the sample base station is obtained, and then the calculated temperature calibration data is written into the base stations with the same model. But the temperature calibration data does not necessarily fit all base stations, resulting in inaccurate temperature calibration. Meanwhile, in the using process, as the base station ages, the temperature characteristic of the radio frequency device of the base station also changes, but the calibration data stored in the register is not updated along with the change of the temperature characteristic, so that the accuracy of the change of the output power of the base station along with the time is reduced.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an online calibration method and device for a feedback channel, which can provide a constant reference power to a feedback link of a base station, and can perform real-time online calibration on the feedback channel under the conditions of environmental temperature change of the base station and aging of the base station, thereby achieving the purpose of improving the accuracy of the reflected power of the base station.
In order to solve the above technical problem, the present invention provides an online calibration method for a feedback channel, comprising the steps of:
acquiring the actual power value of a feedback channel accessed with constant reference power under the current working condition in real time;
calling a pre-stored original calibration table according to a current working frequency point in the current working condition of the base station to obtain original calibration data corresponding to the current working frequency point;
and performing real-time online calibration on the feedback channel according to the current actual power value of the feedback channel and the original calibration data.
Correspondingly, the embodiment of the invention also provides an online calibration device for the feedback channel, which comprises:
a reference power output module for providing a constant reference power to the feedback link;
the data real-time acquisition module is used for acquiring the actual power value of the feedback channel accessed with the constant reference power under the current working condition in real time;
the calling module is used for calling an original calibration table pre-stored in the base station according to the current working frequency point in the working condition of the current day to obtain original calibration data corresponding to the current working frequency point;
and the calibration module is used for carrying out real-time online calibration on the feedback channel according to the called original calibration data and the real power value of the feedback channel acquired in real time.
The embodiment of the invention has the following beneficial effects:
the reference power value output by the invention does not change along with the change of the temperature, thereby ensuring the accuracy of the power of the feedback channel and further ensuring the accuracy of the transmitting power of the base station; meanwhile, the base station can finish temperature calibration at normal temperature without high and low temperature circulating experiments. The invention is built for an analog circuit, has lower cost and can be used for large-scale commercial use.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an embodiment of a feedback channel on-line calibration method of the present invention;
FIG. 2 is a flow chart of an embodiment of a feedback channel on-line calibration method of the present invention;
FIG. 3 is a functional block diagram of an embodiment of an online calibration apparatus for a feedback channel according to the present invention;
FIG. 4 is a diagram showing a connection relationship between a reference power output module and a feedback link in an online calibration apparatus for a feedback channel according to the present invention;
FIG. 5 is a circuit schematic of one embodiment of the reference power output module of FIG. 3;
FIG. 6 is a circuit schematic of one embodiment of the reference voltage module of FIG. 3;
FIG. 7 is a table reflecting the raw reference from the calibration of the production line of the base station in FIG. 1 at normal temperature;
fig. 8 is a table reflecting the original reference table obtained by calibrating the production line of the UMTS 2140MHz base station at normal temperature in fig. 2.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
According to the invention, the calibration difference value between the current condition and the original calibration condition is obtained in the working gap of the feedback channel, and the feedback channel is calibrated on line, so that the feedback channel can keep accurate inspection under different working environments, and the output power of the base station is calibrated through the power of the feedback channel, thereby adjusting the power of the transmitting channel and improving the accuracy of the output power of the base station.
Example one
Referring to fig. 1, it is a flowchart of an embodiment of an online calibration method for a feedback channel of the present invention, specifically, the online calibration method of the present embodiment includes the steps of:
s101, a feedback channel accessed with constant reference power is obtained in real time, and the current actual power value is obtained under the current working condition.
In this embodiment, the current operating condition is relative to the original operating condition. The original working conditions refer to the environment of the base station during production line calibration, such as working frequency points, working temperature and the like. However, the actual operating frequency and the actual operating temperature of the base station will change during the operation of the base station, which will also affect the power value of the feedback channel, and therefore, the current conditions of the base station, i.e., the current operating frequency point and the actual power value at the current operating temperature, need to be obtained, and then the real-time online calibration is performed according to the current conditions.
In this embodiment, when performing calibration, if the local oscillation source of the base station is directly connected to the feedback link, but the local oscillation source will also change with the change of temperature, so to improve the accuracy, in this embodiment, a constant reference power, that is, a frequency source and a reference voltage source are connected to the feedback channel after power constant processing, is connected to the feedback link. In an embodiment, the step of performing the power-constant processing specifically includes the steps of:
the reference power output by the frequency source passes through the power divider, the power output by one output end of the power divider is coupled to the detection module to be converted into a direct-current voltage signal, the direct-current voltage signal is amplified by the logarithmic amplification module, then the logarithmic amplification module is used for comparing the direct-current voltage signal with the reference voltage output by the reference voltage source, and finally the power attenuation module is used for processing the direct-current voltage signal and outputting the processed direct-current voltage signal to obtain the constant reference power.
In an embodiment, before obtaining the actual power value of the feedback channel in real time, a step S107 is further included to perform production line calibration on the base station to obtain an original calibration table, specifically, the method includes the steps of:
a, carrying out frequency calibration on a feedback channel accessed with constant reference power at normal temperature to obtain frequency points corresponding to different working frequency pointsThe frequency compensation value of (1). During specific implementation, according to the working frequency band corresponding to each base station and according to a certain frequency interval, frequency calibration is performed on the base stations under different working frequency points, so that a group of original calibration data is obtained: working frequency point Freq and frequency compensation value P corresponding to the working frequency point Freqcal1。
And B, when different working frequency points are obtained, feeding back the power value of the channel and the corresponding working temperature.
And C, generating an original calibration table according to the frequency compensation values corresponding to different working frequency points, the feedback channel power value and the working temperature value. In specific implementation, the original calibration table comprises a plurality of working frequency points, and a frequency compensation value P corresponding to each working frequency pointcal1The working temperature corresponding to each working frequency point, and the feedback channel power value, etc., are shown in fig. 7.
And S103, calling a pre-stored original calibration table according to the current working frequency point of the base station to obtain original calibration data corresponding to the current working frequency point.
And S105, performing real-time online calibration on the feedback channel according to the current actual power value of the feedback channel and the original calibration data.
In the embodiment, the reference power accessed to the feedback link is subjected to constant power processing, so that the feedback link is accessed to a constant reference power which does not change along with the temperature change, the accuracy of the power of a feedback channel is ensured, the accuracy of the transmitting power of the base station is ensured, and meanwhile, the online temperature calibration can be performed on the transmitting channel of the base station, so that the transmitting power of the base station does not change along with the aging of the base station, namely, the transmitting power of the base station can be kept accurate for a long time; meanwhile, the base station can finish temperature calibration at normal temperature without high and low temperature cycle experiments, thereby reducing the production cost and saving resources.
Example two
Referring to fig. 2, it is a flowchart of an embodiment of the feedback channel on-line calibration method of the present invention. In this embodiment, a UMTS 2140MHz base station with a rated output power of P is adopted, and a local oscillator of the base station is used as a frequency source, that is, the base station can provide a signal with a distance of 2110MHz to 2170MHz and 200KHz, and when the method is implemented specifically, the method for online calibration includes the following steps:
s201, performing power constant processing on the reference power accessed to the feedback link to obtain constant reference power, and accessing the reference power to the feedback link.
In a specific embodiment, a reference power output module and a single-pole-three-throw switch are arranged between a local oscillator (i.e., a frequency source) of a base station and a primary receiver PRX of the base station, as shown in fig. 3, so that a reference input power P1 output by the frequency source is 0dBm to a power attenuation unit (composed of a plurality of PIN diodes connected in series), a part of power is coupled to a detection diode through a power divider, the power signal is converted into a direct-current voltage signal by using the characteristics of the detection diode, the voltage signal is in an exponential relationship with the input power of the detection diode, and after being amplified by a logarithmic amplifier, the voltage signal is in direct proportion with the input power of the detection diode, and after being compared with a reference voltage Vref by an integral comparator, the voltage signal is input to the power attenuation unit. Even if the reference power input P1 changes along with the temperature change, the direct-current voltage input into the PIN diode also changes due to the device characteristics, and the power attenuation amount of the PIN diode also changes along with the change, so that the reference power P2 after the power divider is ensured not to change along with the change of the temperature, the obtained reference power value P2 is-10 dBm, and the obtained reference power value is input into a feedback link after passing through a single-pole three-throw switch SP 3T.
And S202, setting the current working frequency point to 2110MHz at normal temperature.
S203, obtaining a feedback channel coupling forward power value Ptcpw1And base station output power Pout。
In one embodiment, the SPP 3T is switched to the forward path and the read feedback path couples the forward power value Ptcpw1Reading the output power P of the base station by a meterout。
And S204, calculating a frequency compensation value according to the feedback channel coupling forward power value and the reference output power, and storing the frequency compensation value.
In one embodiment, the frequency is adjustedThe rate compensation value is A1＝Pout-Ptcpw1。
S205, the power value of the feedback channel and the current working temperature value are obtained and stored.
In one embodiment, the single-pole-three-throw electronic switch SP3T is switched to the reference channel, and the current power value of the feedback channel is read as B1Meanwhile, the current working temperature is acquired as T1And written into a register of the base station.
S206, switching the working frequency point according to the preset frequency interval, and executing the steps S203-S206 until the working frequency point is 2170MHz, so as to obtain the original calibration table shown in FIG 5.
Referring to fig. 5, in an ideal state, when the operating frequency point of the base station is 2140MHz, the corresponding operating temperature is T181, but due to the heating of the electronic device itself, aging, or environment, after a period of operation, when the operating frequency point of the base station is 2140MHz, the operating temperature does not stay at T181 all the time, that is, the operating temperature of the base station changes, and the operating temperature at this time changes T', so that if a real-time online calibration is to be performed, the current actual power value of the feedback channel needs to be obtained, so that the real-time online calibration is performed according to the original calibration data of the original standard table, that is, step S207 is performed.
S207, the current actual power value of the feedback forward channel and the current actual power value of the feedback channel under the current condition are obtained.
In a specific embodiment, the current condition is a current working frequency of 2140MHz, and the current working temperature is T'. As can be seen from FIG. 5, in the original calibration table, when the working frequency point is 2140MHz, the corresponding working temperature is T181From this, it can be seen that the operating temperature of the base station has changed, specifically, the single pole three throw switch SP3T is switched to the feedback forward channel, and the feedback channel coupling forward power value P is readtcpw(ii) a The single-pole three-throw switch SP3T is switched to the reference channel, and the feedback channel power value is read as B'.
S208, calling the original calibration table to obtain a frequency compensation value A corresponding to the 2140MHz working frequency point181And feedbackChannel power reading B181Calculating the output power value of the base station as Ptcpw+A181+B’-B181。
And carrying out temperature calibration on line when the environmental temperature of the base station changes and the base station is aged, so as to achieve the purpose of improving the accuracy of the transmitting power. The same is true for other frequency points.
EXAMPLE III
Referring to fig. 3, a functional block diagram of an embodiment of the online calibration apparatus for feedback channels of the present invention is shown, specifically, the online calibration apparatus in this embodiment includes:
a reference power output module 31 for providing a constant reference power to the feedback channel; specifically, the reference power output module 31 includes: a frequency source for providing a reference input power (in an embodiment, the frequency source may directly adopt a local oscillator of a base station), a reference voltage submodule for providing a reference voltage, a control switch for channel selection (in an embodiment, the control switch is a single-pole-three-throw switch), and a power attenuation submodule for providing a constant reference power to a feedback link of the base station, wherein two input terminals of the power attenuation submodule are electrically connected to the frequency source and the reference voltage submodule, respectively, an output terminal of the power attenuation submodule is electrically connected to a first control terminal of the control switch, an output terminal of the control switch is externally connected to a main set receiving module PRX of the base station, and second and third control terminals of the control switch are connected to a forward channel and a reverse channel of the feedback link, respectively, see fig. 4;
the data real-time acquisition module 32 is used for acquiring current condition parameters of the base station and acquiring a feedback channel accessed with constant reference power in real time, wherein the actual power value is under the current condition; in this embodiment, the current working condition is relative to an original working condition, where the original working condition refers to an environment where the base station is located during production line calibration, such as a working frequency point, a working temperature, and the like; however, the actual operating frequency and the actual operating temperature of the base station will change during the operation of the base station, which will also affect the power value of the feedback channel, so that the current conditions of the base station, i.e. the current operating frequency point and the actual power value at the current operating temperature, need to be obtained, and then the real-time online calibration is performed according to the current conditions; in one embodiment, the data real-time acquisition module 32 may be implemented using a power meter;
a calling module 33 connected to the data real-time acquisition module 32, configured to call, according to the current working frequency point in the obtained current condition parameter, original calibration data corresponding to the current working frequency point in an original calibration table pre-stored in the base station;
and a calibration module 34 connected to the calling module 33, configured to perform real-time online calibration on the feedback channel according to the called original calibration data and the real power value of the feedback channel obtained in real time, and perform production line calibration on the base station in advance to obtain an original calibration table.
In a specific embodiment, referring to fig. 5, the power attenuation sub-module specifically includes: a power divider, a detection unit, a logarithmic amplification unit, an integral comparison unit, and a power attenuation unit, wherein,
the first input end of the power attenuation unit is externally connected with the frequency source, the output end of the power attenuation unit is electrically connected with the input end of the power divider, the first output end of the power divider is electrically connected with the first control end of the control switch, the second control end and the third control end of the control switch are respectively and externally connected to a forward channel (namely one output end of the coupler) and a reverse channel (namely a node between the circulator and the load attenuator in the feedback link) of the feedback link, and the output end of the control switch is electrically connected with the PRX receiving master set of the base station; and is
The second output end of the power divider is electrically connected with the first input end of the integral comparison unit through the detection unit and the logarithmic amplification unit, the output end of the integral comparison unit is electrically connected with the second input end of the power attenuation module, and the second input end of the power divider is externally connected with the reference voltage submodule.
In one embodiment, referring to fig. 4, the reference voltage submodule comprises L DO, a digital-to-analog converter DAC and a voltage follower connected in series in sequence, wherein a linear voltage regulator L DO is connected with an external power supply, and an output end of the voltage follower is electrically connected with an input end of the reference power output module, specifically, the high-precision L DO converts a 5.5V power supply voltage in the base station into a 5V voltage with precision of +/-0.1%, the 5V voltage is divided into 2.5V and then input into a 16Bi t-bit DAC, the DAC output voltage can be adjusted through DATA, when a DATA bit is 1111111111111111, the DAC output voltage is 2.5V, and a stable reference voltage Vref is output through the voltage follower and input into a comparator, wherein the stable reference voltage Vref is 2.5V.
In this embodiment, when the frequency source outputs a reference power P1 to the power attenuation sub-module, the reference power P1 couples a part of power to the detection module through a power divider in the power attenuation sub-module, and converts the power signal into a dc voltage signal by using the characteristics of the detection module, where the voltage signal is exponentially related to the input power of the detection module, and after the voltage signal is amplified by the logarithmic amplification module, the voltage signal is directly proportional to the input power of the detection module, and then the voltage signal is compared with the reference voltage by the integral comparison module and then input to the power attenuation unit. When the temperature changes, the reference power input P1 changes accordingly, the dc voltage input to the power attenuation unit also changes due to the device characteristics, and accordingly, the attenuation amount of the power attenuation unit changes according to the change of the input voltage, so that when the reference power input P1 changes, the power attenuation amount of the power attenuation unit also changes accordingly, thereby ensuring that the reference power P2 after the power divider does not change according to the change of the temperature.
According to the invention, a reference power output module is built through an analog circuit, and the constant reference power output by the reference power output module is accessed into a feedback link of the base station, so that the accuracy of the power of a feedback channel is ensured, and the accuracy of the transmitting power of the base station is further ensured; and, because build for analog circuit, the cost is lower, can be large-scale commercial.
On the other hand, the online calibration device can also carry out online temperature calibration on the transmitting channel of the base station, so that the transmitting power cannot change along with the aging of the base station, and the transmitting power of the base station can be kept accurate for a long time; meanwhile, the base station can finish temperature calibration at normal temperature without high and low temperature circulating experiments.
Example four
The invention also provides a power control device capable of outputting constant power, the specific structure and working principle of the power control device are the same as those of the reference power output module in the third embodiment, the same components are denoted by the same reference numerals, and the details are not repeated here.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (14)
1. A feedback channel online calibration method is characterized by comprising the following steps:
acquiring the actual power value of a feedback channel accessed with constant reference power under the current working condition in real time;
calling a pre-stored original calibration table according to a current working frequency point in the current working condition of the base station to obtain original calibration data corresponding to the current working frequency point;
and performing real-time online calibration on the feedback channel according to the current actual power value of the feedback channel and the original calibration data.
2. The method for calibrating a feedback path in-line as claimed in claim 1, wherein the constant reference power is obtained by performing a power constant process on a reference power accessed to the feedback path.
3. The method for on-line calibration of a feedback channel according to claim 2, wherein the step of performing power constancy processing on the reference power accessed into the feedback link to obtain a constant reference power specifically comprises the steps of:
the method comprises the steps of enabling reference power output by a frequency source to pass through a power divider, coupling power output by one output end of the power divider to a detection module to enable the detection module to convert the power output by the output end of the power divider into a direct-current voltage signal, amplifying the direct-current voltage signal by a logarithmic amplification module, comparing the direct-current voltage signal with reference voltage provided by a reference voltage source by an integral comparison module, and outputting the constant reference power after the power signal is processed by a power attenuation module.
4. The method for calibrating the feedback channel on line according to claim 1, wherein the step of obtaining the actual power value of the feedback channel under the current operating condition in real time further comprises the steps of:
and carrying out production line calibration on the feedback channel accessed to the constant reference power in advance to obtain an original calibration table.
5. The method for calibrating a feedback channel on line according to claim 4, wherein the step of calibrating the feedback channel accessing the constant reference power in advance to obtain an original calibration table comprises the steps of:
at normal temperature, carrying out frequency calibration on the feedback channel accessed to the constant reference power to obtain frequency compensation values corresponding to different working frequency points; at the same time, the user can select the desired position,
when different working frequency points are obtained, the power value of the feedback channel and the corresponding working temperature are obtained;
and generating a corresponding original calibration table according to the frequency compensation values, the feedback channel power values and the working temperature values corresponding to the different working frequency points.
6. An online calibration device for a feedback channel, comprising:
a reference power output module for providing a constant reference power to the feedback link;
the data real-time acquisition module is used for acquiring the actual power value of the feedback channel accessed with the constant reference power under the current working condition in real time;
the calling module is used for calling an original calibration table pre-stored in a base station according to the current working frequency point in the current working condition to obtain original calibration data corresponding to the current working frequency point;
and the calibration module is used for carrying out real-time online calibration on the feedback channel according to the called original calibration data and the real power value of the feedback channel acquired in real time.
7. The feedback channel on-line calibration device of claim 6, wherein the reference power output module comprises: the frequency source and reference voltage submodule, the control switch, and two input terminals are respectively with the power attenuation submodule that the frequency source with the reference voltage submodule electricity is connected, and the output terminal of the power attenuation submodule still with the first control end electricity of control switch is connected, the second of control switch, three control end are respectively external to the forward channel and the backward channel of feedback link, its output end is external to connect to the major set receiving module of base station.
8. The feedback channel on-line calibration device of claim 7, wherein the power attenuation sub-module comprises: a power divider, a detection unit, a logarithmic amplification unit, an integral comparison unit, and a power attenuation unit, wherein,
a first input end of the power attenuation unit is externally connected with the frequency source, an output end of the power attenuation unit is electrically connected with an input end of the power divider, and a first output end of the power divider is electrically connected with a first control end of the control switch; the second output end of the power divider is electrically connected with the first input end of the integral comparison unit sequentially through the detection unit and the logarithmic amplification unit, the output end of the integral comparison unit is electrically connected with the second input end of the power attenuation unit, and the second input end of the integral comparison unit is externally connected with the reference voltage submodule.
9. The feedback channel on-line calibration device of claim 8, wherein the control switch is a single-pole-three-throw switch.
10. The feedback channel on-line calibration device as claimed in any one of claims 8-9, wherein the reference voltage submodule comprises a linear voltage regulator L DO, a digital-to-analog converter DAC and a voltage follower connected in series in sequence, wherein the linear voltage regulator L DO is connected to an external power supply, and an output terminal of the voltage follower is electrically connected to the integral comparison unit.
11. A power control apparatus capable of outputting a constant power, comprising:
a frequency source for providing a reference input power;
a reference voltage submodule for providing a reference voltage;
the control switch is used for controlling channel selection;
the two input ends of the power attenuation submodule are respectively and electrically connected with the frequency source and the reference voltage submodule, and the output end of the power attenuation submodule is also electrically connected with the first control end of the control switch;
the power attenuation sub-module includes: the power divider, the detection unit, the logarithmic amplification unit, the integral comparison unit and the power attenuation unit; the reference power output by the frequency source passes through the power divider, the power output by one output end of the power divider is coupled to the detection unit to be converted into a direct-current voltage signal, the direct-current voltage signal is amplified by the logarithmic amplification unit, then the logarithmic amplification unit is used for comparing the direct-current voltage signal with the reference voltage provided by the reference voltage submodule, and finally the constant reference power is obtained after the power attenuation unit processes the direct-current voltage signal and outputs the constant reference power.
12. The power control apparatus of claim 11 wherein,
a first input end of the power attenuation unit is externally connected with the frequency source, an output end of the power attenuation unit is electrically connected with an input end of the power divider, and a first output end of the power divider is electrically connected with a first control end of the control switch; the second output end of the power divider is electrically connected with the first input end of the integral comparison unit sequentially through the detection unit and the logarithmic amplification unit, the output end of the integral comparison unit is electrically connected with the second input end of the power attenuation unit, and the second input end of the integral comparison unit is externally connected with the reference voltage submodule.
13. The power control device as claimed in claim 11 or 12, wherein the control switch is a single pole, triple throw switch.
14. The power control device as claimed in claim 12, wherein the reference voltage submodule comprises a linear voltage regulator L DO, a digital-to-analog converter DAC and a voltage follower connected in series in sequence, wherein the linear voltage regulator L DO is connected with an external power supply, and an output end of the voltage follower is electrically connected with the integral comparison unit.
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| CN111371415A (en) * | 2020-03-13 | 2020-07-03 | 西南科技大学 | Intelligent frequency discrimination linearizer of 6GHz-18GHz ultra-wideband solid-state power amplifier |
| CN111398674B (en) * | 2020-03-30 | 2022-05-03 | 西南科技大学 | Ultra-wideband power level measurement and control circuit |
| CN114070430B (en) * | 2020-07-29 | 2022-09-16 | 大唐移动通信设备有限公司 | Triggering method and device for antenna calibration |
| CN114172593A (en) * | 2021-11-04 | 2022-03-11 | 杭州涂鸦信息技术有限公司 | Power calibration method, calibration equipment and calibration system of wireless module |
| CN114124008A (en) * | 2021-11-12 | 2022-03-01 | 中国电子科技集团公司第二十九研究所 | Broadband self-adaptive AGC circuit and assembling method thereof |
| CN115001414B (en) * | 2022-05-09 | 2024-06-14 | 西安北方华创微电子装备有限公司 | Radio frequency power supply |
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| CN107508644A (en) | 2017-12-22 |
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