CN117728831A - Radio frequency signal source capable of being calibrated and calibration method thereof - Google Patents
Radio frequency signal source capable of being calibrated and calibration method thereof Download PDFInfo
- Publication number
- CN117728831A CN117728831A CN202311741869.7A CN202311741869A CN117728831A CN 117728831 A CN117728831 A CN 117728831A CN 202311741869 A CN202311741869 A CN 202311741869A CN 117728831 A CN117728831 A CN 117728831A
- Authority
- CN
- China
- Prior art keywords
- module
- radio frequency
- signal
- signal source
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 77
- 238000001914 filtration Methods 0.000 claims abstract description 20
- 230000003321 amplification Effects 0.000 claims abstract description 19
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims description 40
- 238000004891 communication Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000012952 Resampling Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Transmitters (AREA)
Abstract
The invention discloses a radio frequency signal source capable of being calibrated and a calibration method thereof. The phase-locked loop module and the filtering module are controlled by the main control module to generate a required frequency signal. The main control module is combined with the digital attenuation module, the power amplification module, the signal channel selection module, the logarithmic detection module and the storage module, and the required radio frequency signal power is adjusted through an automatic control gain algorithm. The problem of inaccurate output signals caused by the occurrence of device performance change is solved by the calibration method of the radio frequency signal source. The radio frequency signal source of the invention realizes a simplified system structure by using the low-cost commercial shelf chip, reduces the manufacturing cost and reduces the volume of the instrument. And through integrated calibration function, provide convenient calibration mode for the user, use manpower sparingly and time.
Description
Technical Field
The invention relates to the technical field of measurement and test, in particular to a radio frequency signal source capable of being calibrated and a method for calibrating the radio frequency signal source.
Background
In modern communication and electronic systems, the source of the radio frequency signal plays a vital role. They are used to generate radio frequency signals to meet various application requirements, including wireless communications, radar, satellite communications, and radio frequency test instruments. Today's sources of radio frequency signals typically have a variety of functions including generating a variety of signals and adjusting phase, frequency, power, etc. However, this versatile design also brings about a complex system structure, resulting in high manufacturing costs and large volumes. However, in some rf microwave applications, there is a major need to generate rf signals with adjustable frequency and power, and other functions in the rf signal source are not used, but such a requirement requires users to purchase such a multifunctional device at an expensive price. In addition, devices in the radio frequency signal source have service lives, and when output power is inaccurate due to device aging or device performance change caused by the influence of working environment, factory return calibration is usually needed to keep the accuracy of outputting radio frequency signals. Therefore, a radio frequency signal source with a simplified system structure and adjustable frequency and power is required to be designed, so that the cost is reduced, the volume is reduced, and the market demand is met. Meanwhile, in order to solve the problem that the accuracy of an output signal is reduced due to the fact that a device ages or the performance of the device changes under different working environments, the radio frequency signal source is integrated with a calibration function. The user can calibrate the radio frequency signal source by matching the computer with the frequency spectrograph according to the requirement, and the equipment is not required to be returned to the factory, so that a more convenient solution is provided for the user, and the labor and time are saved.
Disclosure of Invention
The invention aims to disclose a radio frequency signal source capable of being calibrated and a calibration method thereof, which realize a simplified system structure while ensuring that the radio frequency signal source has the frequency and power adjustable function, and solve the problems that the existing radio frequency signal source is too high in manufacturing cost and too large in volume due to the complex system structure, so that the existing radio frequency signal source is not suitable for users in the field of partial radio frequency microwaves. In addition, through the integrated calibration function of the radio frequency signal source, the problems of labor waste and time waste caused by factory return calibration when the output signal is inaccurate due to the change of the device performance of the traditional radio frequency signal source are avoided. The frequency range of the output signal of the radio frequency signal source of the embodiment is 500MHz to 6GHz, and the power range of the output signal is-30 dBm to 0dBm.
In order to achieve the above object, the present invention provides the following solutions:
the invention relates to a radio frequency signal source capable of being calibrated, which comprises a phase-locked loop module, a filtering module, a digital attenuation module, a power amplification module, a signal channel selection module, a logarithmic detection module, a main control module and a storage module.
The phase-locked loop module is used for generating an initial frequency signal;
the filtering module is used for filtering out the higher harmonic signals carried by the initial signals, and the frequency range of the output signals is 500MHz to 6GHz;
the digital attenuation module is used for adjusting the power of the signal to be output;
the power amplification module is used for compensating power loss in the radio frequency signal source radio frequency link;
the signal channel selection module is used for selecting an output end of the radio frequency signal source or the logarithmic detection module to which the signal to be output is connected;
the logarithmic detection module is used for converting the signal to be output into a detection signal;
the main control module is used for performing data processing and controlling the operation of each module so as to enable the radio frequency signal source to generate a required signal;
the storage module is used for storing a standard signal data table used in the process of adjusting the output signal power of the radio frequency signal source;
preferably, the phase-locked loop module of the invention is composed of a reference frequency source and an ultra-wideband phase-locked loop;
the reference frequency source is used for providing a reference frequency signal for the ultra-wideband phase lock;
the control end and the output end of the phase-locked loop module are respectively connected with the main control module and the filtering module;
the ultra-wideband phase-locked loop generates an initial frequency signal by writing frequency control information sent by the main control module.
Preferably, the filtering module of the invention is composed of a first single-pole four-throw radio frequency switch, a second single-pole four-throw radio frequency switch and a four-way filter;
the common end of the first single-pole four-throw radio frequency switch is connected with the output end of the phase-locked loop module, and the four-way filter is connected between four non-common ends of the first single-pole four-throw radio frequency switch and the second single-pole four-throw radio frequency switch to form a four-way filter selection path;
the public end of the second single-pole four-throw radio frequency switch is used as the output end of the filtering module and is connected with the digital attenuation module;
the control ends of the first single-pole four-throw radio frequency switch and the second single-pole four-throw radio frequency switch are connected with the main control module, and a filter path corresponding to the information gating is selected by a filter which is sent by the main control module, so that the higher harmonic signals carried by the initial frequency signals are filtered;
the filter selection information is determined by the frequency band in which the desired signal is located.
Preferably, the digital attenuation module is a radio frequency step attenuator;
the input end of the digital attenuation module is connected with the output end of the filtering module, the output end of the digital attenuation module is connected with the power amplification module, and the control end of the digital attenuation module is connected with the main control module;
the radio frequency step attenuator changes the attenuation value of the digital attenuation module by writing attenuation control information sent by the main control module.
Preferably, the power amplification module of the invention is composed of a first single-pole double-throw radio frequency switch, a second single-pole double-throw radio frequency switch and two paths of power amplifiers;
the public end of the first single-pole double-throw radio frequency switch is connected with the output end of the digital attenuation module, and the two power amplifiers are connected between the non-public ends of the first single-pole double-throw radio frequency switch and the second single-pole double-throw radio frequency switch to form two power amplification selection paths;
the public end of the second single-pole double-throw radio frequency switch is used as the output end of the power amplification module and is connected with the signal channel selection module;
the control ends of the first single-pole double-throw radio frequency switch and the second single-pole double-throw radio frequency switch are connected with the main control module, and a power amplifier transmitted by the main control module selects a power amplification channel corresponding to information gating;
the power amplifier selection information is determined by the frequency band in which the desired signal is located.
Preferably, the signal channel selection module of the invention is composed of a third single pole double throw radio frequency switch;
the public end of the third single-pole double-throw radio frequency switch is connected with the output end of the power amplification module, the two non-public ends are respectively connected with the output end of the radio frequency signal source and the logarithmic detection module, the control end is connected with the main control module, and the signal to be output is selected to be connected into the output end of the radio frequency signal source or the logarithmic detection module through the signal channel selection information sent by the main control module.
Preferably, the logarithmic detection module of the invention is a broadband logarithmic detector;
the input end of the logarithmic detection module is connected with the signal channel selection module, and the output end of the logarithmic detection module is connected with the main control module;
the logarithmic detection module converts the signal to be output, which is accessed by the signal channel selection module, into a detection signal;
preferably, the main control module of the invention is a micro control unit integrated with an analog-to-digital converter;
the micro control unit sends the frequency control information to the phase-locked loop module, the filter selection information to the filter module and the power amplifier selection information to the power amplifier module according to the acquired required signal configuration information;
the main control module combines the digital attenuation module, the signal channel selection module, the logarithmic detection module and the storage module according to the acquired required signal configuration information, and adjusts the power of the signal to be output through an automatic gain control algorithm of the radio frequency signal source;
the main control module obtains the required signal configuration information set by a user from a computer;
the required signal configuration information consists of frequency parameters and power parameters of the required signals;
the analog-to-digital converter of the microcontroller is used for sampling the detection signal converted and output by the logarithmic detection module.
Preferably, the automatic gain control algorithm of the present invention comprises:
searching the corresponding detection signal sampling value interval in the standard signal data table stored by the storage module according to the frequency parameter and the power parameter in the required signal configuration information;
the detection signal sampling value interval is an interval formed by taking the detection signal sampling value corresponding to two power values which are the same as or adjacent to the required signal frequency and adjacent to the power value in the standard signal data table of the storage module as an interval maximum value.
The main control module controls the signal channel selection module to connect the signal to be output into the logarithmic detection module, the logarithmic detection module converts the signal to be output into the detection signal in real time, and the detection signal is sent into the main control module for sampling;
the main control module judges whether the sampling value of the detection signal is in the searched detection signal sampling value interval, if the sampling value of the detection signal is in the detection signal sampling value interval, the main control module controls the signal channel selection module to access the signal to be output into the output end of the radio frequency signal source, and if the sampling value of the detection signal is not in the detection signal sampling value interval, the digital attenuation module is adjusted to carry out resampling comparison.
In the standard signal data table stored in the storage module, one data unit is composed of a frequency value and a power value of a signal and the sampling value of the main control module of the detection output signal of the logarithmic detector of the signal.
Preferably, the calibration method of the radio frequency signal source of the present invention comprises:
the radio frequency signal source is connected with a computer through USB data, the computer is connected with the spectrometer through TCP/IP communication, and the output end of the radio frequency signal source is connected with the input end of the spectrometer;
the computer transmits a calibration starting command and an attenuation stepping value to the radio frequency signal source and then starts to calibrate;
the radio frequency signal source configures frequency and attenuation values which are not repeated in a monotonic stepping value-taking mode in a range supported by hardware and outputs signals;
the spectrometer measures the output signal of the radio frequency signal source and sends the measured power peak value table to the computer;
after the computer reads the maximum peak power value in the power peak value table, the maximum peak power value is sent to the radio frequency signal source;
the radio frequency signal source stores the maximum peak power value, the sampling value of the current detection signal and the output signal frequency value as one data unit into the storage module;
traversing all the configurable frequencies and attenuation values to generate each data unit to form the standard signal data table;
the configured frequency monotonic stepping value is a preset frequency value in the radio frequency signal source;
and the configuration attenuation value monotonic stepping value is obtained by the radio frequency signal source and is a calibration attenuation stepping value sent by the computer.
The invention has the beneficial effects that the radio frequency signal source capable of being calibrated and the calibration method thereof are provided, the low-cost commercial shelf chip is used to realize the simplified radio frequency signal source system structure while the output signal frequency and the power of the radio frequency signal source are adjustable, so that the manufacturing cost is reduced, the instrument volume is reduced, and a convenient calibration mode is provided for a user through an integrated calibration function, and the labor and the time are saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of the overall structure of a radio frequency signal source according to an embodiment of the present invention.
Fig. 2 is a flowchart of an automatic gain control algorithm for a radio frequency signal source according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a radio frequency signal source calibration platform according to an embodiment of the present invention.
Fig. 4 is a flowchart of a method for calibrating a radio frequency signal source according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to disclose a radio frequency signal source capable of being calibrated and a calibration method thereof, so as to meet the frequency and power adjustable requirement of the radio frequency signal source, improve the accuracy of output signals of the radio frequency signal source, reduce the manufacturing cost, reduce the volume of equipment and reduce the power consumption of the equipment.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The radio frequency signal source of this embodiment is composed of a phase-locked loop module, a filtering module, a digital attenuation module, a power amplification module, a signal channel selection module, a logarithmic detection module, a main control module and a storage module, and is specifically shown in fig. 1.
After the main control module of the embodiment obtains the configuration information of the signal required by the user, the phase-locked loop module is controlled to generate an initial signal, the filtering module is controlled to select a path of filter to filter the higher harmonic signal carried by the initial signal to obtain the required frequency signal, the output signal frequency is 500MHz to 6GHz, the power amplifying module is controlled to compensate the power loss in the radio frequency link of the radio frequency signal source, the digital attenuation module, the signal channel selecting module, the logarithmic detection module and the storage module are combined to obtain the required output signal power through an automatic gain control algorithm, and the output signal power is-30 dBm to 0dBm.
In this embodiment, the user sends configuration information of the required signal to the main control module through the computer, where the configuration information of the required signal includes a frequency value and a power value of the required signal.
The filtering module of the embodiment is composed of a first single-pole four-throw radio frequency switch, a second single-pole four-throw radio frequency switch and a four-way filter, and is specifically shown in fig. 1.
Four paths of filters are respectively connected between four non-public ends of the first single-pole four-throw radio frequency switch and the second single-pole four-throw radio frequency switch.
The method comprises the steps that an initial signal generated by a phase-locked loop module is input into a public end of a first single-pole four-throw radio frequency switch, a filter is selected according to a frequency band change-over switch where a required signal is located to conduct filtering treatment, the required frequency signal is obtained, and the required frequency signal is output to a digital attenuation module through a second single-pole four-throw radio frequency switch.
In this embodiment, the selectable four-way filters are all low-pass filters.
The power amplification module of this embodiment is composed of a first single-pole double-throw radio frequency switch, a second single-pole double-throw radio frequency switch and two power amplifiers, as shown in fig. 1.
Two paths of power amplifiers are respectively connected between two non-public ends of the first single-pole double-throw radio frequency switch and the second single-pole double-throw radio frequency switch.
The digital attenuation module outputs a signal to be input into a public end of the first single-pole double-throw radio frequency switch, a power amplifier is selected according to a frequency band change-over switch where a required signal is located to carry out power compensation processing on the signal, and then the second single-pole double-throw radio frequency switch outputs the signal after power compensation to the signal channel selection module.
In this embodiment, the gain selection of the selectable two power amplifiers satisfies the compensation requirement of the power loss of the rf signal in the rf signal source rf link within the frequency range of the output signal.
The logarithmic detection module of the embodiment can convert an input radio frequency signal into a detection signal with a voltage value linearly changing with the power logarithm of the radio frequency signal under the same signal frequency.
The automatic gain control algorithm of this embodiment is shown in fig. 2, the main control module searches for a detection signal sampling value interval corresponding to a required signal stored in the standard signal data table of the storage module according to the acquired configuration information of the required signal of the user, the main control module controls the signal channel selection module to access the signal to be output to the logarithmic detection module, the logarithmic detection module converts the signal to be output into the detection signal in real time, the detection signal is sent to the main control module for sampling, the main control module judges whether the sampling value of the current detection signal is in the searched detection signal sampling value interval, if the sampling value of the detection signal is in the searched detection signal sampling value interval, the main control module controls the signal channel selection module to access the signal to be output to the output end of the radio frequency signal source, if the sampling value of the detection signal is not in the searched detection signal sampling value interval, the digital attenuation module is adjusted to attenuate the value, and then the comparison is repeated.
One data unit in the standard signal data table stored by the storage module consists of a frequency value, a power value and a main control module sampling value of a logarithmic detector detection output signal of the signal.
In this embodiment, the detected signal sampling value interval corresponding to the signal required by the user is an interval formed by taking detected signal sampling values corresponding to two power values which are the same as or adjacent to the frequency of the required signal and adjacent to the power value in the external storage module.
The embodiment changes the power of the signal to be output by adjusting the attenuation value of the digital attenuation module.
In this embodiment, in the automatic gain control method, the attenuation value adjustment trend of the digital attenuation module is determined by a result of comparing the detection signal sampling value sampled by the main control module in real time with the median value of the detected signal sampling value interval.
The radio frequency signal source calibration platform of the embodiment is composed of a radio frequency signal source, a computer and a spectrometer, and is particularly shown in fig. 3. The radio frequency signal source is connected with the computer through a USB data line, the computer is connected with the spectrometer through an Ethernet connecting line, and the output end of the radio frequency signal source is connected with the input end of the spectrometer through a radio frequency cable line;
in the embodiment, USB data connection is established between a radio frequency signal source and a computer, and TCP/IP communication connection is established between the computer and a spectrometer;
in this embodiment, as shown in fig. 4, after a computer sends a calibration start command and an attenuation step value to a radio frequency signal source to be calibrated, the radio frequency signal source starts to calibrate, configures a frequency and an attenuation value, which are not repeated, in a monotonically stepping value-taking manner within a range supported by hardware, and outputs a signal, a spectrometer measures an output signal of the current radio frequency signal source, sends a measured power peak value table to the computer, the computer reads a maximum peak power in the power peak value table, and then sends the maximum peak power to the radio frequency signal source, the radio frequency signal source stores the maximum peak power, a sampling value of a current detection signal and an output signal frequency value as one data unit in an external storage module, repeats the above calibration process, generates a new data unit and stores the new data unit until all configurable frequencies and attenuation values are traversed, and each data unit forms a standard signal data table.
In this embodiment, the communication protocol between the computer and the spectrometer is the VISA protocol.
In the embodiment, in the calibration process, a main control module controls a phase-locked loop module and a filtering module to generate frequency signals according to the ascending or descending order of frequency in monotonic frequency steps, and under the same frequency, controls a digital attenuation module to adjust attenuation values according to the ascending or descending order of attenuation values in monotonic attenuation value steps, and outputs signals after each frequency value and attenuation value are configured, so that all output signals with non-repeated configurable frequency and attenuation values are traversed;
in this embodiment, the configuration frequency monotonic step value is a preset frequency value in the radio frequency signal source, and the configuration attenuation value monotonic step value is a calibration attenuation step value obtained and calculated by the radio frequency signal source.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. The radio frequency signal source capable of being calibrated is characterized by comprising a phase-locked loop module, a filtering module, a digital attenuation module, a power amplification module, a signal channel selection module, a logarithmic detection module, a main control module and a storage module;
the phase-locked loop module is used for generating an initial frequency signal;
the filtering module is used for filtering out the higher harmonic signals carried by the initial signals, and the frequency range of the output signals is 500MHz to 6GHz;
the digital attenuation module is used for adjusting the power of the signal to be output;
the power amplification module is used for compensating power loss in the radio frequency signal source radio frequency link;
the signal channel selection module is used for selecting an output end of the radio frequency signal source or the logarithmic detection module to which the signal to be output is connected;
the logarithmic detection module is used for converting the signal to be output into a detection signal;
the main control module is used for performing data processing and controlling the operation of each module so as to enable the radio frequency signal source to generate a required signal;
the storage module is used for storing a standard signal data table used in the process of adjusting the output signal power of the radio frequency signal source.
2. A calibratable radio frequency signal source according to claim 1, characterized in that the phase-locked loop module is constituted by a reference frequency source and an ultra wideband phase-locked loop;
the reference frequency source is used for providing a reference frequency signal for the ultra-wideband phase lock;
the control end and the output end of the phase-locked loop module are respectively connected with the main control module and the filtering module;
the ultra-wideband phase-locked loop generates an initial frequency signal by writing frequency control information sent by the main control module.
3. The calibratable radio frequency signal source according to claim 1, wherein the filtering module is composed of a first single-pole four-throw radio frequency switch, a second single-pole four-throw radio frequency switch and a four-way filter;
the common end of the first single-pole four-throw radio frequency switch is connected with the output end of the phase-locked loop module, and the four-way filter is connected between four non-common ends of the first single-pole four-throw radio frequency switch and the second single-pole four-throw radio frequency switch to form a four-way filter selection path;
the public end of the second single-pole four-throw radio frequency switch is used as the output end of the filtering module and is connected with the digital attenuation module;
the control ends of the first single-pole four-throw radio frequency switch and the second single-pole four-throw radio frequency switch are connected with the main control module, and a filter path corresponding to the information gating is selected by a filter which is sent by the main control module, so that the higher harmonic signals carried by the initial frequency signals are filtered;
the filter selection information is determined by the frequency band in which the desired signal is located.
4. The calibratable radio frequency signal source according to claim 1, wherein the digital attenuation module is a radio frequency step attenuator;
the input end of the digital attenuation module is connected with the output end of the filtering module, the output end of the digital attenuation module is connected with the power amplification module, and the control end of the digital attenuation module is connected with the main control module;
the radio frequency step attenuator changes the attenuation value of the digital attenuation module by writing attenuation control information sent by the main control module.
5. The calibratable radio frequency signal source according to claim 1, wherein the power amplification module is composed of a first single pole double throw radio frequency switch, a second single pole double throw radio frequency switch and two power amplifiers;
the public end of the first single-pole double-throw radio frequency switch is connected with the output end of the digital attenuation module, and the two power amplifiers are connected between the non-public ends of the first single-pole double-throw radio frequency switch and the second single-pole double-throw radio frequency switch to form two power amplification selection paths;
the public end of the second single-pole double-throw radio frequency switch is used as the output end of the power amplification module and is connected with the signal channel selection module;
the control ends of the first single-pole double-throw radio frequency switch and the second single-pole double-throw radio frequency switch are connected with the main control module, and a power amplifier transmitted by the main control module selects a power amplification channel corresponding to information gating;
the power amplifier selection information is determined by the frequency band in which the desired signal is located.
6. A calibratable radio frequency signal source according to claim 1, characterized in that said signal path selection module is constituted by a third single pole double throw radio frequency switch;
the public end of the third single-pole double-throw radio frequency switch is connected with the output end of the power amplification module, the two non-public ends are respectively connected with the output end of the radio frequency signal source and the logarithmic detection module, the control end is connected with the main control module, and the signal to be output is selected to be connected into the output end of the radio frequency signal source or the logarithmic detection module through the signal channel selection information sent by the main control module.
7. A calibratable radio frequency signal source according to claim 1, wherein said logarithmic detection module is a wideband logarithmic detector;
the input end of the logarithmic detection module is connected with the signal channel selection module, and the output end of the logarithmic detection module is connected with the main control module;
and the logarithmic detection module converts the signal to be output, which is accessed by the signal channel selection module, into the detection signal.
8. The calibratable radio frequency signal source according to claim 1, wherein the main control module is a micro control unit integrated with an analog-to-digital converter;
the micro control unit sends the frequency control information to the phase-locked loop module, the filter selection information to the filter module and the power amplifier selection information to the power amplifier module according to the acquired required signal configuration information;
the main control module combines the digital attenuation module, the signal channel selection module, the logarithmic detection module and the storage module according to the acquired required signal configuration information, and adjusts the power of the signal to be output through an automatic gain control algorithm of the radio frequency signal source;
the main control module obtains the required signal configuration information set by a user from a computer;
the required signal configuration information consists of frequency parameters and power parameters of the required signals;
the analog-to-digital converter of the microcontroller is used for sampling the detection signal converted and output by the logarithmic detection module.
9. A calibratable radio frequency signal source according to claim 8, wherein said automatic gain control algorithm comprises:
searching the corresponding detection signal sampling value interval in the standard signal data table stored by the storage module according to the frequency parameter and the power parameter in the required signal configuration information;
the detection signal sampling value interval is an interval formed by taking the detection signal sampling value corresponding to two power values which are the same as or adjacent to the required signal frequency and adjacent to the power value in the standard signal data table of the storage module as an interval maximum value.
The main control module controls the signal channel selection module to connect the signal to be output into the logarithmic detection module, the logarithmic detection module converts the signal to be output into the detection signal in real time, and the detection signal is sent into the main control module for sampling;
the main control module judges whether the sampling value of the detection signal is in the searched detection signal sampling value interval, if the sampling value of the detection signal is in the detection signal sampling value interval, the main control module controls the signal channel selection module to access the signal to be output into the output end of the radio frequency signal source, and if the sampling value of the detection signal is not in the detection signal sampling value interval, the digital attenuation module is adjusted to carry out resampling comparison.
In the standard signal data table stored in the storage module, one data unit is composed of a frequency value and a power value of a signal and the sampling value of the main control module of the detection output signal of the logarithmic detector of the signal.
10. A calibratable radio frequency signal source according to claim 1, characterized in that the method of calibrating the radio frequency signal source comprises:
the radio frequency signal source is connected with a computer through USB data, the computer is connected with the spectrometer through TCP/IP communication, and the output end of the radio frequency signal source is connected with the input end of the spectrometer;
the computer transmits a calibration starting command and an attenuation stepping value to the radio frequency signal source and then starts to calibrate;
the radio frequency signal source configures frequency and attenuation values which are not repeated in a monotonic stepping value-taking mode in a range supported by hardware and outputs signals;
the spectrometer measures the output signal of the radio frequency signal source and sends the measured power peak value table to the computer;
after the computer reads the maximum peak power value in the power peak value table, the maximum peak power value is sent to the radio frequency signal source;
the radio frequency signal source stores the maximum peak power value, the sampling value of the current detection signal and the output signal frequency value as one data unit into the storage module;
traversing all the configurable frequencies and attenuation values to generate each data unit to form the standard signal data table;
the configured frequency monotonic stepping value is a preset frequency value in the radio frequency signal source;
and the configuration attenuation value monotonic stepping value is obtained by the radio frequency signal source and is a calibration attenuation stepping value sent by the computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311741869.7A CN117728831A (en) | 2023-12-15 | 2023-12-15 | Radio frequency signal source capable of being calibrated and calibration method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311741869.7A CN117728831A (en) | 2023-12-15 | 2023-12-15 | Radio frequency signal source capable of being calibrated and calibration method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117728831A true CN117728831A (en) | 2024-03-19 |
Family
ID=90204827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311741869.7A Pending CN117728831A (en) | 2023-12-15 | 2023-12-15 | Radio frequency signal source capable of being calibrated and calibration method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117728831A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118337212A (en) * | 2024-06-06 | 2024-07-12 | 上海合频电子科技有限公司 | Time domain calibration method of radio frequency signal sampling equipment and radio frequency signal sampling equipment |
-
2023
- 2023-12-15 CN CN202311741869.7A patent/CN117728831A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118337212A (en) * | 2024-06-06 | 2024-07-12 | 上海合频电子科技有限公司 | Time domain calibration method of radio frequency signal sampling equipment and radio frequency signal sampling equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8145166B2 (en) | Enhanced programmable automatic level control | |
| CN117728831A (en) | Radio frequency signal source capable of being calibrated and calibration method thereof | |
| CN102780535B (en) | A kind of vector network analyzer Poewr control method based on intermediate frequency detection | |
| RU2004101967A (en) | SYSTEM AND METHOD FOR CALIBRATING POWER CONTROL OF A RADIO COMMUNICATION DEVICE | |
| US20080096514A1 (en) | Controlling the bandwidth of an analog filter | |
| CN112272036B (en) | Temperature compensation device and method for radio frequency receiver and radio frequency receiver | |
| US11711153B2 (en) | Wireless signal performance adjustment apparatus and method and wireless communication terminal | |
| CN104536339A (en) | High-speed-digital-demodulation-based power control system and method of vector network analyzer | |
| CN100473996C (en) | Apparatus for detecting linear index of power amplifier | |
| US20070040605A1 (en) | Shared receiver and transmitter filter | |
| US20060223440A1 (en) | Low frequency noise source and method of calibration thereof | |
| CN110995368A (en) | Circuit structure and method for quickly calibrating power for frequency spectrograph | |
| CN108847902B (en) | Measuring circuit and measuring method for noise signal power | |
| CN109150332B (en) | Device and method for pre-measuring passive intermodulation by using vector harmonics | |
| CN107370471B (en) | PXI bus programmable amplifier/attenuator and calibration method thereof | |
| US8457561B2 (en) | Method and system for signal strength measurement | |
| TW202017311A (en) | Radio frequency signal amplification device and front-end module | |
| CN108459203B (en) | Ultra-wideband frequency-sweeping pulse power detection device and method | |
| US20220376718A1 (en) | Transmitter and associated calibration method | |
| CN113466774A (en) | System and method for realizing automatic calibration of frequency spectrograph power under condition of adapting to ADC linear characteristic | |
| CN109412621B (en) | Four-channel independent amplitude-stabilized local oscillator power dividing device and method | |
| CN112653459A (en) | Radio frequency signal source capable of being calibrated in real time | |
| US6969985B2 (en) | Active coupler | |
| CN115801149B (en) | Receiver pre-selector calibration method, system, electronic equipment and storage medium | |
| CN114389983B (en) | Testing device for network analyzer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |