CN116827344A - Quantum measurement and control low-phase noise frequency source generating device - Google Patents
Quantum measurement and control low-phase noise frequency source generating device Download PDFInfo
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Abstract
The invention discloses a quantum measurement and control low-phase noise frequency source generating device, which relates to the field of frequency source generation and comprises a clock source, a four-power dividing module, a frequency source module, an amplifying and filtering module and a power amplifying and selecting piece, and further comprises a digital control board, wherein the digital control board comprises eight paths of control outputs, and the eight paths of control outputs are respectively and independently controlled by four frequency sources and four amplifying and filtering circuits; the output harmonic signals of the frequency source are subjected to sectional filtering suppression through four amplifying and filtering circuits; and the output signal power of the frequency source is calibrated point by point in a full power section through a three-stage numerical control attenuator. The digital control board controls the frequency source module through the SPI and controls the amplifying and filtering module through the RS232 serial port. Each channel is independently controlled and independently output.
Description
Technical Field
The invention relates to the field of frequency source generation, in particular to a quantum measurement and control low-phase noise frequency source generation device.
Background
Based on miniaturization and multi-channel development of the existing system, the requirements on the number of channels of a signal source are increasing, commercial instruments are mostly single channels, and multi-channel independently controllable signal source signals cannot be provided.
For the prior art, the following treatments are common:
(1) Standard instruments in the existing market: the system is characterized in that the system comprises a plurality of channels, wherein the channels are distributed in a single channel, and the channels are distributed in a single channel;
(2) In domestic market, there are similar mature products, 2-5 independently controllable output channels, the product case is a 2U or 3U on-shelf case, in terms of price, one channel is about 5W-6W, the performance is superior, a LAN port is provided, and functions such as remote control are provided.
However, for the drawbacks of the existing solutions, there are mainly the following points:
(1) The existing scheme has large size, single channel and high price, and is not beneficial to integration;
(2) In a multichannel system, a plurality of devices are needed to complete the design of a system architecture, so that the cost is high, and the occupied space is huge.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and aims at the characteristics of multi-channel system integration, low phase noise excitation signals, independent controllability and the like, and the quantum measurement and control low phase noise frequency source generating device, the four-channel independent controllable microwave signal generating device and the ultra-wideband frequency coverage UHF, L, S, C, X and Ku wave bands can meet the integration requirement of a miniaturized system.
The device comprises a clock source, a four-power-division module, a frequency source module, an amplifying filter module and a power amplification selecting piece, wherein the input end of the four-power-division module is connected with the output end of the clock source, the four-power-division module comprises four paths of output, the frequency source module comprises four mutually independent frequency sources, the four input ends of the frequency sources are respectively connected with the four paths of output of the four-power-division module, the amplifying filter module comprises four mutually independent amplifying filter circuits, the four output ends of the frequency sources are respectively connected with the four amplifying filter circuits, and the four amplifying filter circuits are respectively connected with the power amplification selecting piece, wherein:
the device also comprises a digital control board, wherein the digital control board comprises eight control outputs which are respectively and independently controlled by the four frequency sources and the four amplifying and filtering circuits;
the output harmonic signals of the frequency source are subjected to sectional filtering suppression through four amplifying and filtering circuits;
and the output signal power of the frequency source is calibrated point by point in a full power section through a three-stage numerical control attenuator.
Further, the full-power section point-by-point calibration of the three-stage numerical control attenuator specifically comprises the following steps: measuring the output power at 0dB attenuation by using a standard spectrometer in a frequency range of 200MHz-15GHz with 10MHz as a stepThe method comprises the steps of carrying out a first treatment on the surface of the Calculate default attenuation setting +.>The method comprises the steps of carrying out a first treatment on the surface of the Storing the calculated default attenuation value as table data of standard data; according to frequency->Find default attenuation data in the 10MHz range +.>And->The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the frequency by linear interpolation>Default decay data +.>The method comprises the steps of carrying out a first treatment on the surface of the According to the actual setting of the attenuation value +.>dB, calculate output power +.>。
Further, the segmented filtering is suppressed by adopting 8-segment filtering, wherein the frequency range of the 8-segment filtering is as follows: 200M-360M, 360M-500M, 500M-1150M, 1150M-2000M, 2000M-3000M, 3000M-4500M, 4500M-8000M, 8000M-15000M.
Further, the amplifying and filtering circuit comprises a first radio frequency switch, a second radio frequency switch, a third radio frequency switch, a fourth radio frequency switch, a fifth radio frequency switch, a sixth radio frequency switch, a first low-pass filter, a second low-pass filter, a third low-pass filter, a fourth low-pass filter, a fifth low-pass filter, a sixth low-pass filter, a seventh low-pass filter, an eighth low-pass filter, a first attenuator, a second attenuator, a third attenuator, a fourth attenuator, a fifth attenuator, a sixth attenuator, a seventh attenuator and an eighth attenuator; the two control ends of the first radio frequency switch are respectively connected with the controlled ends of a third radio frequency switch and a fifth radio frequency switch, the controlled end of the first radio frequency switch is connected with the radio frequency input end, the four control ends of the third radio frequency switch are respectively connected with the first low-pass filter, the second low-pass filter, the third low-pass filter and the fourth low-pass filter, the four control ends of the fifth radio frequency switch are respectively connected with the input ends of the fifth low-pass filter, the sixth low-pass filter, the seventh low-pass filter and the eighth low-pass filter, the output end of the first filter is connected with the input end of the first attenuator, the output end of the second filter is connected with the input end of the second attenuator, the output end of the third filter is connected with the input end of the third attenuator, the output end of the fourth filter is connected with the input end of the fourth attenuator, the output end of the fifth filter is connected with the output end of the fifth attenuator, the output end of the seventh filter is connected with the output end of the seventh attenuator, the output end of the fourth filter is connected with the fourth attenuator, the output end of the fourth attenuator is connected with the fourth radio frequency switch is connected with the output end of the fourth attenuator, the fourth attenuator is connected with the output end of the fourth attenuator is connected with the radio frequency attenuator is connected with the output of the fourth attenuator is connected with the attenuator; the specific segmentation filter inhibition flow of the amplifying filter circuit is as follows: and selecting a corresponding radio frequency switch channel according to the output frequency, carrying out sectional filtering harmonic wave and spurious wave through the filtering of a first low-pass filter, a second low-pass filter, a third low-pass filter, a fourth low-pass filter, a fifth low-pass filter, a sixth low-pass filter, a seventh low-pass filter and an eighth low-pass filter, regulating lower power and matching through an attenuator, and outputting through a second radio frequency switch.
Further, the frequency range of the frequency source output signal is 200MHz-15GHz, and the frequency source output signal power; the frequency source is at a signal frequency of 10 GHz and the phase noise reaches-116 dBc/Hz when the signal deviates from the main signal by 10 kHz.
Further, the power supply device also comprises a power supply, wherein the power supply adopts 220V alternating current or +48V direct current to supply power, and power supply circuits of the power supply are mutually independent.
Further, the digital control board controls the frequency source module through the SPI and the amplifying and filtering module through the RS232 serial port, and the digital control board receives external communication through the network port or the USB serial port.
Further, the digital control board controls the four frequency sources through four paths of SPI serial interfaces respectively, and the control flow specifically comprises: an initialization configuration command is sent through the SPI, and a frequency source is started; waiting for initialization completion through SPI inquiry state; the output frequency is set through the SPI, the state is queried at regular time, and the working condition is monitored.
Further, the digital control board controls the four amplifying and filtering circuits through four paths of RS232 serial ports respectively, and the control flow specifically comprises: an initialization configuration command is sent through RS232, and an amplifying and filtering module is started; the method comprises the steps of setting output power through RS232, inquiring the state at fixed time, and detecting working conditions, wherein the RS232 sets the output power and further comprises the step of selecting frequency bands.
The beneficial effects of the invention are as follows:
(1) The digital control board controls the frequency source module through the SPI and controls the amplifying and filtering module through the RS232 serial port. Each channel is independently controlled and independently output;
(2) The invention adopts sectional filtering to restrain the harmonic signal output by the frequency source. The design adopts a three-level numerical control attenuator to calibrate the power of an output signal, ensures that a full-band signal can cover a larger dynamic range with the output power within-20 dBm to +20dBm and the power flatness, calibrates the full-band signal in a full-power segment point-by-point calibration mode, and ensures the accuracy of each power point value;
(3) The invention realizes a multichannel lower phase noise signal generation system with lower cost, and has higher cost performance for a single-channel signal source of a commercial instrument.
Drawings
FIG. 1 is a system block diagram of a quantum measurement and control low-phase noise frequency source generating device provided by an embodiment of the invention;
FIG. 2 is a schematic circuit diagram of a quantum measurement and control low-phase noise frequency source generating device for segmented filter suppression according to an embodiment of the invention;
in the figure, 101-first radio frequency switch, 102-second radio frequency switch, 103-third radio frequency switch, 104-fourth radio frequency switch, 105-fifth radio frequency switch, 106-sixth radio frequency switch, 201-first low pass filter, 202-second low pass filter, 203-third low pass filter, 204-fourth low pass filter, 205-fifth low pass filter, 206-sixth low pass filter, 207-seventh low pass filter, 208-eighth low pass filter, 301-first attenuator, 302-second attenuator, 303-third attenuator, 304-fourth attenuator, 305-fifth attenuator, 306-sixth attenuator, 307-seventh attenuator, 308-eighth attenuator.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings, but the scope of the present invention is not limited to the following description.
For the purpose of making the technical solution and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention. It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
As shown in FIG. 1, the quantum measurement and control low-phase-noise frequency source generating device comprises a clock source, four power dividing modules, a frequency source module, an amplifying and filtering module and power amplification options, wherein the input end of each four power dividing module is connected with the output end of the clock source, each four power dividing module comprises four paths of output, each frequency source module comprises four mutually independent frequency sources, the input ends of each four frequency sources are respectively connected with the four paths of output of each four power dividing module, each amplifying and filtering module comprises four mutually independent amplifying and filtering circuits, each output end of each frequency source is respectively connected with each four amplifying and filtering circuits, and each amplifying and filtering circuit is respectively connected with the power amplification options. Specifically, the clock source is used for providing a stable clock signal and controlling the working rhythm and synchronization of the whole device; the four-power dividing module is used for dividing an input signal into four equally divided signals and is used for frequency mutual comparison and phase control; the frequency source module is used for generating a stable frequency signal, and is usually a main output signal source; the amplifying and filtering module is used for amplifying and filtering the signals so as to enhance the signal strength and remove unnecessary frequency components; the power amplifier option is a power amplifier option and is used for increasing the power of an output signal so as to meet the requirements of specific applications. Specifically, the clock source internal reference adopts a constant temperature crystal oscillator module with high stability and low phase noise of 100MHz, and the external reference source 10MHz switching is realized through a selector. The frequency source module takes an input low-noise clock as a reference and takes a low-noise voltage-controlled oscillator VCO as a core, so that low-phase noise signal output of 200MH-15GHz is realized. The amplifying and filtering module adopts filter bank switching to realize harmonic wave and spurious suppression, and adopts multistage amplification and numerical control attenuation to realize signal power adjustment, and the maximum output power is 10dBm. The power amplifier option final stage is an optional low noise power amplifier module to further increase the power output to 20dBm.
Further, the device also comprises a digital control board, wherein the digital control board comprises eight paths of control outputs, and the eight paths of control outputs are respectively and independently controlled by the four frequency sources and the four amplifying and filtering circuits; the output harmonic signals of the frequency source are subjected to sectional filtering suppression through four amplifying and filtering circuits; and the output signal power of the frequency source is calibrated point by point in a full power section through a three-stage numerical control attenuator. Specifically, a control principle of the digital control board in the above embodiment is proposed as follows:
1. input signal analysis: the digital control board analyzes the input control signal to determine that a specific frequency source or an amplifying filter needs to be controlled next;
2. control signal generation: based on the analysis result and a preset control strategy, the digital control board generates corresponding control signals to control the corresponding frequency source module and the amplifying filter module;
3. preferably, the digital control board is also included, according to flexible programming capability, and adjustment and updating of the control strategy can be performed according to requirements.
Furthermore, a preferred embodiment is provided, in which the quantum measurement and control low-phase noise frequency source generating device is composed of 4 frequency source modules, 4 amplifying filter modules, 1 power amplifier selection piece, 1 digital control board, 1 power module, 1 constant temperature crystal oscillator and 1 power division module, and in the prior art, it is difficult to accommodate the modules under a standard 1U chassis, and in order to solve the problem, the technical means of division module design, micro assembly technology and the like are adopted to achieve the purpose. The rate source and the amplifying filter module are core modules of the system, the real sizes of the modules are respectively 80 x 65 x 13mm and 90 x 76 x 17mm, and each module is provided with a control circuit to realize time-sharing control and is output independently. The power supply circuits are mutually independent, and the modules are interconnected by adopting radio frequency cables, so that relatively high inter-channel isolation (more than or equal to 100 dBc) is brought.
Specifically, as a model selection type preferred in the embodiment, a constant-temperature crystal oscillator module with high stability and low phase noise is adopted as an internal reference of a clock source, and 10MHz switching of an external reference source is realized through a selector. The four-power-division module design realizes a passive high-synchronization and stable power-division unit. The frequency source module takes an input low-noise clock as a reference and takes a low-noise voltage-controlled oscillator VCO as a core, so that low-phase noise signal output of 200MH-15GH is realized. The amplifying and filtering module adopts filter bank switching to realize harmonic wave and spurious suppression, and adopts multistage amplification and numerical control attenuation to realize signal power adjustment, and the maximum output power is 10dBm. The power amplifier option final stage is an optional low noise power amplifier module that further increases the power output to 20dBm.
Further, the frequency range of the frequency source output signal is 200MHz-15GHz, and the frequency source output signal power is used for realizing larger bandwidth coverage and low phase noise; the frequency source is at a signal frequency of 10 GHz and the phase noise reaches-116 dBc/Hz when the signal deviates from the main signal by 10 kHz. In which the phase noise of the signal representing the 10 kHz offset relative to the main signal is very low. In this frequency range, the phase noise of-116 dBc/Hz is considered very low, indicating that the device has very high accuracy and stability in terms of output.
Further, the full-power section point-by-point calibration of the three-stage numerical control attenuator specifically comprises the following steps: measuring the output power at 0dB attenuation by using a standard spectrometer in a frequency range of 200MHz-15GHz with 10MHz as a stepThe method comprises the steps of carrying out a first treatment on the surface of the Calculate default attenuation setting +.>The method comprises the steps of carrying out a first treatment on the surface of the Storing the calculated default attenuation value as table data of standard data; according to frequency->Find default attenuation data in the 10MHz range +.>And->The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the frequency by linear interpolation>Default decay data +.>The method comprises the steps of carrying out a first treatment on the surface of the According to the actual setting of the attenuation value +.>dB, calculate output power +.>。
Further, the segmented filtering is suppressed by adopting 8-segment filtering, wherein the frequency range of the 8-segment filtering is as follows: 200M-360M, 360M-500M, 500M-1150M, 1150M-2000M, 2000M-3000M, 3000M-4500M, 4500M-8000M, 8000M-15000M.
Further, as shown in fig. 2, the amplifying and filtering circuit includes a first rf switch 101, a second rf switch 102, a third rf switch 103, a fourth rf switch 104, a fifth rf switch 105, a sixth rf switch 106, a first low-pass filter 201, a second low-pass filter 202, a third low-pass filter 203, a fourth low-pass filter 204, a fifth low-pass filter 205, a sixth low-pass filter 206, a seventh low-pass filter 207, an eighth low-pass filter 208, a first attenuator 301, a second attenuator 302, a third attenuator 303, a fourth attenuator 304, a fifth attenuator 305, a sixth attenuator 306, a seventh attenuator 307, and an eighth attenuator 308; the two control ends of the first rf switch 101 are respectively connected with the controlled ends of the third rf switch 103 and the fifth rf switch 105, the controlled end of the first rf switch 101 is connected with the rf input end, the four control ends of the third rf switch 103 are respectively connected with the first low-pass filter 201, the second low-pass filter 202, the third low-pass filter 203 and the fourth low-pass filter 204, the four control ends of the fifth rf switch 105 are respectively connected with the input ends of the fifth low-pass filter 205, the sixth low-pass filter 206, the seventh low-pass filter 207 and the eighth low-pass filter 208, the output end of the first filter 201 is connected with the input end of the first attenuator 301, the output end of the second filter 202 is connected with the input end of the second attenuator 302, the output end of the third filter 203 is connected with the input end of the third attenuator 303, the output end of the fourth filter 204 is connected to the input end of the fourth attenuator 304, the output end of the fifth filter 205 is connected to the input end of the fifth attenuator 305, the output end of the sixth filter 206 is connected to the input end of the sixth attenuator 306, the output end of the seventh filter 207 is connected to the input end of the seventh attenuator 307, the output end of the eighth filter 208 is connected to the input end of the eighth attenuator 308, the four-way controlled ends of the fourth radio frequency switch 104 are respectively connected to the output ends of the first attenuator 304, the second attenuator 302, the third attenuator 303 and the fourth attenuator 304, the four-way controlled ends of the sixth radio frequency switch 106 are respectively connected to the output ends of the fifth attenuator 305, the sixth attenuator 306, the seventh attenuator 307 and the eighth attenuator 308, the two-way controlled ends of the second radio frequency switch 102 are respectively connected to the control ends of the fourth radio frequency switch 104 and the sixth radio frequency switch 106, the control end of the second radio frequency switch 102 is connected with a radio frequency output; the specific segmentation filter inhibition flow of the amplifying filter circuit is as follows: according to the output frequency, the corresponding radio frequency switch channels are selected, and the harmonics and the spurious are filtered by the filtering of the first low-pass filter 201, the second low-pass filter 202, the third low-pass filter 203, the fourth low-pass filter 204, the fifth low-pass filter 205, the sixth low-pass filter 206, the seventh low-pass filter 207 and the eighth low-pass filter 208 in a segmented manner, and the lower power and the matching are adjusted by an attenuator and are output by the second radio frequency switch 102.
Further, the power supply device also comprises a power supply, wherein the power supply adopts 220V alternating current or +48V direct current to supply power, and power supply circuits of the power supply are mutually independent.
Further, the digital control board controls the frequency source module through the SPI and the amplifying and filtering module through the RS232 serial port, and the digital control board receives external communication through the network port or the USB serial port. Specifically, in this embodiment, the SPI is a communication protocol used to transmit data between microcontrollers or digital devices. In this embodiment, the digital control board communicates and controls with the frequency source module through the SPI interface. Through SPI, the digital control board can send instruction and parameter to the frequency source module, controls parameters such as its output frequency. Furthermore, the digital control board is also communicated and controlled with the amplifying and filtering module through an RS232 serial port. RS232 is a serial communication interface standard commonly used to connect and communicate a computer with external devices. Through the RS232 serial port, the digital control board can send control instructions and parameters, such as output power adjustment, filter parameter setting and the like, to the amplifying and filtering module. Preferably, the digital control board also has a network port or USB serial port for receiving external communications. The network port refers to an ethernet interface, and communication with other devices or networks is achieved through an ethernet protocol. The USB serial port is used for carrying out serial communication through the USB interface. Through the two interfaces, the digital control board can receive control commands or parameters sent by external equipment or a computer, and the communication between the outside and the digital control board is realized. For example, a frequency source module and an amplification filter module need to be controlled by a digital control board. The digital control board is connected with the frequency source module through the SPI interface, and can send instructions and parameters to the frequency source module to set frequency output and the like. Meanwhile, the digital control board is connected with the amplifying and filtering module through an RS232 serial port, and can send control instructions and parameters, such as set amplification factors, filter parameters and the like, to the amplifying and filtering module. In addition, the digital control board can also receive external communication through a network port or a USB serial port. For example, a computer connected to a local area network or the internet through a network port can send control commands or parameters to the digital control board through the computer to realize remote control and adjustment.
Furthermore, the harmonic signals output by the frequency source are suppressed by adopting sectional filtering. The design adopts a three-stage numerical control attenuator to calibrate the power of an output signal, ensures that a full-band signal can cover a larger dynamic range with the output power within-20 dBm to +20dBm and the power flatness, and ensures the accuracy of each power point value by adopting a full-power segment point-by-point calibration mode for the full-band signal. In particular, the above embodiments aim to suppress harmonic signals output from a frequency source and perform power calibration. The design suppresses harmonic signals by adopting a segmented filter, and uses a three-stage numerical control attenuator to realize the calibration of output signal power. The overall goal is to ensure that the power of the output signal ranges between-20 dBm and +20dBm with good power flatness. In order to realize full-band power calibration, the embodiment adopts a full-power segment point-by-point calibration method to ensure the accuracy of each power point.
Further, the digital control board controls the four frequency sources through four paths of SPI serial interfaces respectively, and the control flow specifically comprises: an initialization configuration command is sent through the SPI, and a frequency source is started; waiting for initialization completion through SPI inquiry state; the output frequency is set through the SPI, the state is queried at regular time, and the working condition is monitored.
Further, the digital control board controls the four amplifying and filtering circuits through four paths of RS232 serial ports respectively, and the control flow specifically comprises: an initialization configuration command is sent through RS232, and an amplifying and filtering module is started; the method comprises the steps of setting output power through RS232, inquiring the state at fixed time, and detecting working conditions, wherein the RS232 sets the output power and further comprises the step of selecting frequency bands.
Further, this embodiment has two main parts. First, a segmented filter is employed to reject harmonic signals output by the frequency source. The harmonic signal is a multiple of the frequency component that may interfere with the desired signal. By means of the segmented filtering mode, harmonic signals can be selectively filtered, and therefore output signal quality is improved. Secondly, a three-stage numerical control attenuator is used for realizing the calibration of the output signal power. A digitally controlled attenuator is a device that is capable of adjusting the power of a signal in response to an input control signal. By using the cascade of three-stage attenuators, accurate adjustment of the output signal power can be achieved. This design ensures that the output signal power is in the range of-20 dBm to +20dBm and that flatness is maintained over the entire frequency range.
In order to ensure the power calibration accuracy of the full-band signal, the embodiment adopts a full-power segment point-by-point calibration mode. This means that for each power point that needs to be calibrated, an independent calibration operation is performed to ensure the accuracy of each power point. The point-by-point calibration method can effectively ensure the accuracy of the power value of the full-band signal, so that the output signal can meet the required power level in the whole frequency range.
Further, the embodiment can realize independent control of different systems or devices through multi-path control. Each channel can be controlled and regulated independently without interfering with each other. Thus, different systems or devices can be flexibly and independently regulated, and different requirements are met. And the multiplexing control can realize synchronous control of a plurality of systems or devices. Through synchronous control, a plurality of systems or devices can be ensured to operate under the same control parameters, and the effect of cooperative work is achieved. This is important for some application scenarios where a close fit between multiple systems or devices is required. The use of multiplexing control can simplify the structure of the overall control system. Compared with the simple superposition of a plurality of controls, the multipath control can integrate different control channels into one system, so that the number of external interfaces and devices is reduced, and the reliability and stability of the system are improved. And multiple control may save costs as compared to superimposing multiple control schemes alone. The multipath control reduces the requirements of equipment and interfaces by sharing part of hardware resources, and reduces the hardware cost.
The foregoing is merely a preferred embodiment of the invention, and it is to be understood that the invention is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the invention are intended to be within the scope of the appended claims.
Claims (9)
1. The utility model provides a quantum observes and controls low phase noise frequency source generating device, includes clock source, four merit divide the module, frequency source module, amplifies filter module, power amplifier selection piece, four merit divide the output of module's input connection clock source, four merit divide the module including four way outputs, four frequency source's input is connected four way outputs of four merit divide the module respectively, amplify filter module including four mutually independent amplify filter circuit, four the output of frequency source is connected four respectively and is amplified filter circuit, four amplify filter circuit is connected respectively, its characterized in that:
the device also comprises a digital control board, wherein the digital control board comprises eight control outputs which are respectively and independently controlled by the four frequency sources and the four amplifying and filtering circuits;
the output harmonic signals of the frequency source are subjected to sectional filtering suppression through four amplifying and filtering circuits;
and the output signal power of the frequency source is calibrated point by point in a full power section through a three-stage numerical control attenuator.
2. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the full-power section point-by-point calibration of the three-stage numerical control attenuator specifically comprises: measuring the output power at 0dB attenuation by using a standard spectrometer in a frequency range of 200MHz-15GHz with 10MHz as a stepThe method comprises the steps of carrying out a first treatment on the surface of the Calculate default attenuation setting +.>The method comprises the steps of carrying out a first treatment on the surface of the Storing the calculated default attenuation value as table data of standard data; according to frequency->Find default attenuation data in the 10MHz range +.>And->The method comprises the steps of carrying out a first treatment on the surface of the Obtaining the frequency by linear interpolation>Default decay data +.>The method comprises the steps of carrying out a first treatment on the surface of the According to actual setting of attenuation valuesdB, calculate output power +.>。
3. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the segmented filtering is suppressed by using 8-segment filtering, wherein the frequency range of the 8-segment filtering is as follows: 200M-360M, 360M-500M, 500M-1150M, 1150M-2000M, 2000M-3000M, 3000M-4500M, 4500M-8000M, 8000M-15000M.
4. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the amplifying and filtering circuit comprises a first radio frequency switch, a second radio frequency switch, a third radio frequency switch, a fourth radio frequency switch, a fifth radio frequency switch, a sixth radio frequency switch, a first low-pass filter, a second low-pass filter, a third low-pass filter, a fourth low-pass filter, a fifth low-pass filter, a sixth low-pass filter, a seventh low-pass filter, an eighth low-pass filter, a first attenuator, a second attenuator, a third attenuator, a fourth attenuator, a fifth attenuator, a sixth attenuator, a seventh attenuator, and an eighth attenuator; the two control ends of the first radio frequency switch are respectively connected with the controlled ends of a third radio frequency switch and a fifth radio frequency switch, the controlled end of the first radio frequency switch is connected with the radio frequency input end, the four control ends of the third radio frequency switch are respectively connected with the first low-pass filter, the second low-pass filter, the third low-pass filter and the fourth low-pass filter, the four control ends of the fifth radio frequency switch are respectively connected with the input ends of the fifth low-pass filter, the sixth low-pass filter, the seventh low-pass filter and the eighth low-pass filter, the output end of the first filter is connected with the input end of the first attenuator, the output end of the second filter is connected with the input end of the second attenuator, the output end of the third filter is connected with the input end of the third attenuator, the output end of the fourth filter is connected with the input end of the fourth attenuator, the output end of the fifth filter is connected with the output end of the fifth attenuator, the output end of the seventh filter is connected with the output end of the seventh attenuator, the output end of the fourth filter is connected with the fourth attenuator, the output end of the fourth attenuator is connected with the fourth radio frequency switch is connected with the output end of the fourth attenuator, the fourth attenuator is connected with the output end of the fourth attenuator is connected with the radio frequency attenuator is connected with the output of the fourth attenuator is connected with the attenuator; the specific segmentation filter inhibition flow of the amplifying filter circuit is as follows: and selecting a corresponding radio frequency switch channel according to the output frequency, carrying out sectional filtering harmonic wave and spurious wave through the filtering of a first low-pass filter, a second low-pass filter, a third low-pass filter, a fourth low-pass filter, a fifth low-pass filter, a sixth low-pass filter, a seventh low-pass filter and an eighth low-pass filter, regulating lower power and matching through an attenuator, and outputting through a second radio frequency switch.
5. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the frequency range of the frequency source output signal is 200MHz-15GHz, and the frequency source output signal power; the frequency source is at a signal frequency of 10 GHz and the phase noise reaches-116 dBc/Hz when the signal deviates from the main signal by 10 kHz.
6. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, further comprising a power supply, wherein the power supply adopts 220V alternating current or +48V direct current for power supply, and power supply circuits of the power supply are independent from each other.
7. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the digital control board controls the frequency source module through an SPI, controls the amplifying and filtering module through an RS232 serial port, and receives external communication through a network port or a USB serial port.
8. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the digital control board controls four frequency sources through four paths of SPI serial interfaces respectively, and the control flow specifically comprises: an initialization configuration command is sent through the SPI, and a frequency source is started; waiting for initialization completion through SPI inquiry state; the output frequency is set through the SPI, the state is queried at regular time, and the working condition is monitored.
9. The quantum measurement and control low-phase noise frequency source generating device according to claim 1, wherein the digital control board controls the four amplifying and filtering circuits through four RS232 serial ports respectively, and the control flow specifically includes: an initialization configuration command is sent through RS232, and an amplifying and filtering module is started; the method comprises the steps of setting output power through RS232, inquiring the state at fixed time, and detecting working conditions, wherein the RS232 sets the output power and further comprises the step of selecting frequency bands.
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| CN202310895540.XA CN116827344A (en) | 2023-07-20 | 2023-07-20 | Quantum measurement and control low-phase noise frequency source generating device |
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| CN202310895540.XA CN116827344A (en) | 2023-07-20 | 2023-07-20 | Quantum measurement and control low-phase noise frequency source generating device |
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