CN114337551A - Down-conversion device, control method and control unit on broadband - Google Patents
Down-conversion device, control method and control unit on broadband Download PDFInfo
- Publication number
- CN114337551A CN114337551A CN202210243992.5A CN202210243992A CN114337551A CN 114337551 A CN114337551 A CN 114337551A CN 202210243992 A CN202210243992 A CN 202210243992A CN 114337551 A CN114337551 A CN 114337551A
- Authority
- CN
- China
- Prior art keywords
- signal
- output
- input
- frequency
- module
- 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.)
- Granted
Links
Images
Abstract
The invention relates to the technical field of signal processing, in particular to a broadband up-down frequency conversion device, a control method and a control unit. In addition, a plurality of frequency points in the bandwidth are integrated, so that the system is simplified, and the cost is reduced; the numerical control attenuator front-back matching technology is utilized to realize smaller group delay variation within a larger gain adjustment range; realizing small dynamic group delay in the signal bandwidth by using the group delay equalization and impedance matching technology of the filter; by utilizing a program fitting technology, the consistency of high output power in a broadband frequency range is realized, and the labor cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of signal processing, in particular to a broadband up-down frequency conversion device, a control method and a control unit.
Background
The development of navigation technology is greatly promoted in all countries of the world, and the progress of the navigation technology is closely related to signal processing.
Optimization of navigation systems, including increasingly higher range accuracy. In the prior art, as an important signal processing component of a navigation system, the application range of the frequency conversion technology of a single frequency point of a frequency conversion device is narrow, and different modules need to be replaced aiming at different frequency points. The problem that comes with is that the operation is cumbersome and the system is not compact enough.
Therefore, an up-down conversion module with high time delay stability and wide frequency is urgently needed to simplify the system. The method can be used for further application of high-precision distance measurement in the fields of satellite navigation, military communication, radar and the like.
Therefore, a broadband up-down conversion device needs to be developed and designed.
Disclosure of Invention
The embodiment of the invention provides a broadband up-down conversion device, a control method and a control unit, which are used for solving the problem that the structure of a frequency conversion device in the prior art is not compact enough.
In a first aspect, an embodiment of the present invention provides a broadband up-down conversion apparatus, including:
the device comprises an up-conversion unit, a down-conversion unit, a local oscillator unit and a control unit;
the up-conversion unit, the down-conversion unit and the local oscillator unit are respectively in signal connection with the control unit, and the up-conversion unit and the down-conversion unit are in signal connection with the local oscillator unit;
the local oscillation unit receives an external clock signal and a control signal of the control unit and provides a local oscillation signal for the up-conversion unit or the down-conversion unit;
the up-conversion unit is used for converting the local oscillator signal and an externally input intermediate frequency signal into a radio frequency signal, and the down-conversion unit is used for converting the local oscillator signal and an externally input radio frequency signal into an intermediate frequency signal;
the control unit is used for outputting a first signal for controlling the up-conversion unit or the down-conversion unit to work according to an external command, and outputting a signal for controlling the local oscillator unit to output the local oscillator signal frequency according to the external command.
In one possible implementation, the up-conversion unit includes: the first input signal adjusting module, the first mixing module, the attenuation module and the first output amplifying circuit;
the output end of the first input signal adjusting module and the output end of the local oscillator unit are respectively in signal connection with the first frequency mixing module, the output end of the first frequency mixing module is in signal connection with the input end of the attenuation module, the output end of the attenuation module is in signal connection with the input end of the first output amplifying circuit, and the control unit is in signal connection with the control end of the attenuation module;
the first signal comprises a second signal, and the second signal is a signal which is used for outputting a signal for controlling the first input signal adjusting module according to an external command by the control unit so as to compensate the difference of different amplification factors of the first output amplifying circuit for different frequency signals, so that the power of the radio frequency signals with different frequencies output by the first output amplifying circuit tends to be consistent;
the first input signal adjusting module is used for filtering and amplifying the externally input intermediate frequency signal according to the second signal;
the first frequency mixing module is used for mixing frequency according to the local oscillator signal from the local oscillator unit and the intermediate frequency signal from the input signal adjusting module to realize up-conversion of the intermediate frequency signal to a radio frequency signal;
the attenuation module is used for attenuating the radio frequency signal from the first frequency mixing module;
the first output amplifying circuit is used for amplifying the radio-frequency signal from the attenuation module.
In one possible implementation manner, the down-conversion unit includes:
the second input amplifying circuit, the second mixing module, the gain adjusting module, the attenuation module and the second output adjusting module;
the output end of the second input amplifying circuit and the output end of the local oscillator unit are respectively in signal connection with the input end of the second frequency mixing module, the output end of the second frequency mixing module is in signal connection with the input end of the gain adjusting module, the output end of the gain adjusting module is in signal connection with the input end of the attenuation module, and the output end of the attenuation module is in signal connection with the input end of the second output adjusting module;
the second input amplifying circuit is used for amplifying the externally input radio frequency signal;
the first signal comprises a third signal, and the third signal is a signal which is used by the control unit to output and control the attenuation coefficient of the gain adjustment module according to an external command so as to compensate the difference that the second input amplification circuit presents different amplification factors to different frequency signals;
the second frequency mixing module is used for mixing frequency according to the local oscillator signal from the local oscillator unit and the radio frequency signal from the second input amplifying circuit to realize down-conversion of the radio frequency signal to an intermediate frequency signal;
the gain adjusting module is used for attenuating the externally input radio frequency signal according to the third signal;
the attenuation module is used for attenuating the signal output by the gain adjustment module;
the second output adjusting module is used for amplifying the radio frequency signal from the attenuation module.
In one possible implementation, the attenuation module includes: the digital-controlled attenuator comprises a first digital-controlled attenuator, an intermediate amplifier, a second digital-controlled attenuator, an input delay matching circuit and an output delay matching circuit;
the input delay matching circuit is connected with the input end of the first numerical control attenuator, the output end of the first numerical control attenuator is connected with the input end of the intermediate amplifier, the output end of the intermediate amplifier is connected with the input end of the second numerical control attenuator, and the output end of the second numerical control attenuator is connected with the input end of the output delay matching circuit;
the input delay matching circuit is used for matching the input impedance and the signal transmission delay of the first numerical control attenuator, the output delay matching circuit is used for matching the output impedance and the signal transmission delay of the second numerical control attenuator, and the intermediate amplifier is used for transmitting signals between the first numerical control attenuator and the second numerical control attenuator so as to avoid time delay change caused by mutual traction.
In one possible implementation, the input delay matching circuit includes: a first resistor and a first capacitor;
the first end of the first resistor is connected with a power ground, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the input end of the first numerical control attenuator; and the connection point of the second end of the first resistor and the first end of the first capacitor is used as a signal input end for receiving the input of signals.
In one possible implementation, the output delay matching circuit includes: a second resistor and a fourth capacitor;
the second end of the second resistor is connected with a power ground, the first end of the second resistor is connected with the second end of the fourth capacitor, and the first end of the fourth capacitor is connected with the output end of the second digital controlled attenuator; and the connection point of the first end of the second resistor and the second end of the fourth capacitor is used as a signal output end for outputting signals.
In one possible implementation, the first mixing module includes: the mixer circuit comprises a first selection switch, a plurality of first mixer circuits and a second selection switch;
the input end of the first selection switch is in signal connection with the output end of the first input signal adjusting module, a plurality of output ends of the first selection switch are in signal connection with first input ends of the plurality of first mixing circuits respectively, a plurality of input ends of the second selection switch are in signal connection with output ends of the plurality of first mixing circuits respectively, and an output end of the second selection switch is in signal connection with the attenuating module;
the second input ends of the first frequency mixing circuits are respectively in signal connection with the output ends of the local oscillation units;
the first signal comprises a fourth signal, and the fourth signal is a signal which is used by the control unit to output and control the first selection switch and the second selection switch according to an external command;
the first selection switch and the second selection switch are configured to select one first mixing circuit from the plurality of first mixing circuits to mix the intermediate frequency signal and the local oscillation signal from the local oscillation unit according to the fourth signal.
In one possible implementation, the second mixing module includes: a third selection switch, a plurality of second mixer circuits, and a fourth selection switch;
the input end of the third selection switch is in signal connection with the output end of the second input amplification circuit, a plurality of output ends of the third selection switch are in signal connection with the first input ends of the plurality of second mixing circuits respectively, a plurality of input ends of the fourth selection switch are in signal connection with the output ends of the plurality of second mixing circuits respectively, and the output end of the fourth selection switch is in signal connection with the attenuation module;
second input ends of the second frequency mixing circuits are respectively in signal connection with a plurality of output ends of the local oscillation unit;
the first signal includes a fifth signal, and the fifth signal is a signal used by the control unit to output a control signal to the third selection switch and the fourth selection switch according to an external command;
the third selection switch and the fourth selection switch are configured to select one second mixing circuit from the plurality of second mixing circuits to mix the radio frequency signal and the local oscillation signal from the local oscillation unit according to the fifth signal.
In a second aspect, an embodiment of the present invention provides a method for controlling a broadband up-down conversion, including:
acquiring an external command, wherein the external command comprises information representing variable frequency;
if the external command is an up-conversion command, acquiring the up-conversion frequency;
selecting a frequency mixing module corresponding to the frequency mixing frequency section according to the frequency of the up-conversion;
acquiring the amplification times of the output amplification circuit to different frequency signals according to the frequency of the up-conversion;
attenuating the radio frequency signal output by the frequency mixing module according to the amplification times of the output amplification circuit on the signals with different frequencies;
if the external command is a down-conversion command, acquiring down-conversion frequency;
selecting a frequency mixing module corresponding to the frequency mixing frequency section according to the frequency of the down-conversion;
acquiring the amplification times of the input amplification circuit to different frequency signals according to the frequency of the down-conversion;
and attenuating the intermediate frequency signal output by the frequency mixing module according to the amplification multiple of the input amplification circuit to the signals with different frequencies.
In a third aspect, the embodiment of the present invention provides a control unit, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the steps of the method according to the possible implementation manner of the second aspect.
Compared with the prior art, the implementation mode of the invention has the following beneficial effects:
the embodiment of the invention discloses an embodiment of a broadband up-down frequency conversion device, which combines up-down frequency conversion units together and can complete frequency mixing of externally input intermediate frequency signals or radio frequency signals according to an external instruction, so that the broadband up-down frequency conversion device has a more compact structure and stronger functions compared with the prior art. In addition, (1) integrate a plurality of frequency points in the bandwidth, have simplified the system, has reduced the cost; (2) the numerical control attenuator front-back matching technology is utilized to realize smaller group delay variation within a larger gain adjustment range; (3) realizing small dynamic group delay in the signal bandwidth by using the group delay equalization and impedance matching technology of the filter; (4) by utilizing a program fitting technology, the consistency of high output power in a broadband frequency range is realized, and the labor cost is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a general functional block diagram of a broadband up-down conversion device according to an embodiment of the present invention;
FIG. 2 is a functional block diagram of a broadband up-down converter according to an embodiment of the present invention;
fig. 3 is a flowchart of a broadband up-down conversion control method according to an embodiment of the present invention;
fig. 4 is a functional block diagram of a broadband up-down conversion control unit according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following description is made with reference to the accompanying drawings.
The following is a detailed description of the embodiments of the present invention, which is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Fig. 1 is a functional block diagram of a down-conversion device over a wide frequency band according to an embodiment of the present invention.
As shown in fig. 2, it shows a functional block diagram of a device for providing a broadband up-down conversion according to an embodiment of the present invention, which is detailed as follows:
a broadband up-down conversion device comprising:
the device comprises an up-conversion unit, a down-conversion unit, a local oscillator unit and a control unit.
The up-conversion unit, the down-conversion unit and the local oscillator unit are respectively in signal connection with the control unit, and the up-conversion unit and the down-conversion unit are in signal connection with the local oscillator unit.
The local oscillator unit receives an external clock signal and a control signal of the control unit and provides a local oscillator signal for the up-conversion unit or the down-conversion unit.
The up-conversion unit is used for converting the local oscillator signals and the externally input intermediate frequency signals into radio frequency signals, and the down-conversion unit is used for converting the local oscillator signals and the externally input radio frequency signals into intermediate frequency signals.
The control unit is used for outputting a first signal for controlling the up-conversion unit or the down-conversion unit to work according to an external command, and outputting a signal for controlling the local oscillator unit to output the local oscillator signal frequency according to the external command.
In some embodiments, the up-conversion unit comprises: the first input signal adjusting module, the first mixing module, the attenuation module and the first output amplifying circuit.
The output end of the first input signal adjusting module and the output end of the local oscillator unit are respectively in signal connection with the first frequency mixing module, the output end of the first frequency mixing module is in signal connection with the input end of the attenuation module, the output end of the attenuation module is in signal connection with the input end of the first output amplifying circuit, and the control unit is in signal connection with the control end of the attenuation module.
The first signal comprises a second signal, and the second signal is a signal which is used for controlling the first input signal adjusting module by the control unit according to an external command so as to compensate the difference of different amplification factors of the first output amplifying circuit for different frequency signals, so that the power of the radio frequency signals with different frequencies output by the first output amplifying circuit tends to be consistent.
The first input signal adjusting module is used for filtering and amplifying the externally input intermediate frequency signal according to the second signal.
The first frequency mixing module is used for mixing frequency according to the local oscillation signal from the local oscillation unit and the intermediate frequency signal from the input signal adjusting module, so that the intermediate frequency signal is up-converted to a radio frequency signal.
The attenuation module is used for attenuating the radio frequency signal from the first mixing module.
The first output amplifying circuit is used for amplifying the radio-frequency signal from the attenuation module.
In some embodiments, the first mixing module comprises: the mixer circuit comprises a first selection switch, a plurality of first mixer circuits and a second selection switch;
the input end of the first selection switch is in signal connection with the output end of the first input signal adjusting module, a plurality of output ends of the first selection switch are in signal connection with first input ends of the plurality of first mixing circuits respectively, a plurality of input ends of the second selection switch are in signal connection with output ends of the plurality of first mixing circuits respectively, and an output end of the second selection switch is in signal connection with the attenuating module;
second input ends of the first frequency mixing circuits are respectively in signal connection with a plurality of output ends of the local oscillation unit;
the first signal comprises a fourth signal, and the fourth signal is a signal which is used by the control unit to output and control the first selection switch and the second selection switch according to an external command;
the first selection switch and the second selection switch are configured to select one first mixing circuit from the plurality of first mixing circuits to mix the intermediate frequency signal and the local oscillation signal from the local oscillation unit according to the fourth signal.
In some embodiments, the attenuation module comprises: the digital controlled attenuator comprises a first digital controlled attenuator, an intermediate amplifier, a second digital controlled attenuator, an input delay matching circuit and an output delay matching circuit.
The input delay matching circuit is connected with the input end of the first numerical control attenuator, the output end of the first numerical control attenuator is connected with the input end of the intermediate amplifier, the output end of the intermediate amplifier is connected with the input end of the second numerical control attenuator, and the output end of the second numerical control attenuator is connected with the input end of the output delay matching circuit.
The input delay matching circuit is used for matching the input impedance and the signal transmission delay of the first numerical control attenuator, the output delay matching circuit is used for matching the output impedance and the signal transmission delay of the second numerical control attenuator, and the intermediate amplifier is used for transmitting signals between the first numerical control attenuator and the second numerical control attenuator so as to avoid time delay change caused by mutual traction.
In some embodiments, the input delay matching circuit comprises: a first resistor and a first capacitor;
the first end of the first resistor is connected with a power ground, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the input end of the first numerical control attenuator; and the connection point of the second end of the first resistor and the first end of the first capacitor is used as a signal input end for receiving the input of signals.
In some embodiments, the output delay matching circuit comprises: a second resistor and a fourth capacitor;
the second end of the second resistor is connected with a power ground, the first end of the second resistor is connected with the second end of the fourth capacitor, and the first end of the fourth capacitor is connected with the output end of the second digital controlled attenuator; and the connection point of the first end of the second resistor and the second end of the fourth capacitor is used as a signal output end for outputting signals.
Illustratively, in an application scenario, the up-conversion unit receives an external 70MHz intermediate frequency signal, performs up-conversion to a radio frequency signal of 1-7GHz, has a function of numerical control attenuation in a 60dB range inside, and can output an intermediate frequency signal of-5 dBm to a radio frequency signal of-53 to +7dBm as required.
The down-conversion unit receives intermediate frequency signals of which the radio frequency is down-converted to 70MHz +5dBm from 1-7 GHz-77-17 dBm, and the interior of the down-conversion unit is dynamically adjusted by 60 dB.
The up-conversion unit and the down-conversion unit are realized in a segmented mode due to the fact that the radio frequency band is wide, and two frequency bands and two mixers are selected for realization. In order to ensure the consistency of power output in the whole range of 1-7GHz, the medium frequency band is added with one-level numerical control attenuation, and the method is realized by adjusting attenuation control words under different frequencies through a singlechip.
And the local oscillator unit part is used for dividing power into three paths after an external 125MHz reference signal is input, wherein one path is used for an up-conversion local oscillator, the other path is used for a down-conversion local oscillator, and the other path is used for triple frequency multiplication to output a 375MHz clock signal. The up and down frequency conversion local oscillators are respectively realized by independent phase-locked loops. Correspondingly, as the up-conversion unit and the down-conversion unit adopt different mixing circuits for different frequency bands in the aspect of the mixer, the mixing circuits are divided into two segments of 1-3GHz and 3-7GHz, and the local oscillator part is correspondingly divided into two segments.
The up-conversion inputs 70MHz intermediate frequency signals, and the input level is-5 dBm. Firstly, a pi-type attenuation circuit 1, a band-pass filter 2, a numerical control attenuator 3 (playing a role in calibrating consistency of output power) and an amplifier 4 are connected with a 1-3GHz mixing circuit or a 3-7GHz mixing circuit through a 1-from-2 switch 5, after mixing and filtering, the signals are combined by a 10-from-2 switch, and then-53 dBm to +7dBm radio frequency signals are output through an attenuation module 11 with a time delay stabilizing circuit and an output amplifier 12.
Wherein, first input signal adjustment module is including pi type attenuator circuit 1, band pass filter 2, numerical control attenuator 3 and amplifier 4 that receive outside intermediate frequency signal input, pi type attenuator circuit 1's output is connected with band pass filter 2's input, band pass filter 2's output is connected with numerical control attenuator 3's input, numerical control attenuator 3's output is connected with amplifier 4's input, numerical control attenuator 3 receives the control signal of control unit output, in order to compensate amplifier 12 to the difference of different frequency signal amplification, in short, according to the difference of amplification, carry out the decay of different coefficients.
In the first mixing module, the first end of the 2-to-1 switch 5 is connected to the output end of the amplifier 4, and the 2-to-1 switch 5 can be connected to the upper first mixing circuit for 1-3GHz mixing or the lower mixing circuit for 3-7GHz mixing by selection. Taking the upper mixing circuit as an example, the mixer 6 receives the signal of the 2-to-1 switch 5 and the local oscillator signal output by the local oscillator unit, mixes the signals, inputs the output signal after mixing to the band-pass filter 8 for filtering, inputs the output of the band-pass filter 8 to the 2-to-1 switch 10, and completes the output of the upper first mixing circuit signal when the 2-to-1 switch 10 selects the upper first mixing circuit.
In one embodiment, the attenuation module is combined with a delay stabilizing circuit to perform the functions of attenuation and delay adjustment of the mixed rf signal, such as the attenuation module 11 with the delay stabilizing circuit in fig. 2.
The attenuation module 11 with the time delay stabilizing circuit comprises a numerical control attenuation U1, a numerical control attenuation U2, an amplifier U3, matching capacitors C1, C2, C3 and C4, and matching resistors R1 and R2. The input end of the numerical control attenuation U1 is connected with an intermediate frequency or radio frequency signal through a series capacitor C1, the other end of C1 is connected with one end of a resistor R1, and the other end of R1 is grounded, so that the impedance and time delay matching effect on the input end of the numerical control attenuation U1 is achieved. The output end of the numerical control attenuation U1 is connected with one end of a series capacitor C2, and the other end of the capacitor C2 is connected with the input end of an amplifier U3. The output end of the amplifier U3 is connected with one end of a series capacitor C3, and the other end of the capacitor C3 is connected with the input end of the numerical control attenuation U2.
The output end of the numerical control attenuation U2 is connected with one end of a series capacitor C4, the other end of C4 is connected with one end of a resistor R2 besides being connected with an intermediate frequency amplification or radio frequency amplification circuit, and the other end of R2 is grounded, so that the impedance and time delay matching effect of the output end of the numerical control attenuation U2 is achieved.
In order to obtain good time delay stability under gain dynamics, a first-stage amplifying circuit is added between two stages of numerical control attenuators, so that time delay change caused by mutual traction during attenuation is avoided, meanwhile, a series capacitor C1 and a ground resistor R1 are added to the input end of the numerical control attenuation U1, and a series capacitor C4 and a ground resistor R2 are added to the output end of the numerical control attenuation U2 to perform impedance and time delay matching. Through engineering practice, matching parameters are as follows C1=200p, R1=75 Ω, C4=470p, R2=91 Ω. Through the stable design of the time delay, the requirement that the time delay variation is less than 0.1nS under the gain dynamic state of 60dB can be achieved.
The first output amplifying circuit is an amplifier in some application scenarios, and the signal output by the attenuation module 11 with the delay stabilizing circuit is amplified by the amplifier 12 and then output.
In some application scenarios, the control unit takes a single chip as a core device and receives I2And the control instruction of the interface C carries out logic combination according to the control instruction and outputs a corresponding control code of the up-down frequency conversion channel. The control code comprises a data code of the numerical control attenuator, a radio frequency switch control radio frequency channel switch control level and a local oscillation frequency control code, and is output to a corresponding execution chip. The single chip microcomputer receives the up-down frequency conversion channel to carry out self-checking, integrates the self-checking result and passes through I2And C, outputting through an interface. The EEPROM is used for storing calibration data and realizing the power-off memory function.
The broadband up-down frequency conversion device utilizes an EEPROM (electrically erasable programmable read-only memory) and is used for storing a module parameter metering and calibration table, the gain (the gain of a first output amplifying circuit in some application scenes) corresponding to an input 1-7GHz signal is scanned into a curve, meanwhile, the attenuation of numerical control attenuation 3 in a link is reasonably adjusted, the consistency of output power is less than or equal to +/-0.5 dB, at the moment, a group of data tables with one-to-one correspondence of output frequency and digital adjustable attenuation can be obtained, the data tables are written into the EEPROM, when a broadband up-down frequency conversion module receives signals, the data tables in the EEPROM are searched according to frequency information sent by an upper computer, the digital adjustable attenuator 3 is attenuated to a proper size, and the consistency of the output power is less than or equal to +/-0.5 dB. The numerical control attenuators U1 and U2 can achieve a 60dB dynamic range, attenuation codes corresponding to frequency points are correspondingly stored in an EEPROM, and the variation of 60dB dynamic inner group delay is smaller than 0.1nS by performing RC impedance matching on the input and output of the numerical control attenuators U1 and U2.
In an EEPROM in a control unit, output power consistency adjustment is realized through numerical control attenuation 3, an attenuation module 11 with a delay stabilizing circuit realizes output 60dB dynamic adjustment, and 60dB dynamic inner group delay variation is smaller than 0.1nS through impedance matching of numerical control attenuation U1 and numerical control attenuation U2.
In some embodiments, the down-conversion unit includes:
the second input amplifying circuit, the second mixing module, the gain adjusting module, the attenuation module and the second output adjusting module;
the output end of the second input amplifying circuit and the output end of the local oscillator unit are respectively in signal connection with the input end of the second frequency mixing module, the output end of the second frequency mixing module is in signal connection with the input end of the gain adjusting module, the output end of the gain adjusting module is in signal connection with the input end of the attenuation module, and the output end of the attenuation module is in signal connection with the input end of the second output adjusting module;
the second input amplifying circuit is used for amplifying the externally input radio frequency signal;
the first signal comprises a third signal, and the third signal is a signal which is used by the control unit to output and control the attenuation coefficient of the gain adjustment module according to an external command so as to compensate the difference that the second input amplification circuit presents different amplification factors to different frequency signals;
the second frequency mixing module is used for mixing frequency according to the local oscillator signal from the local oscillator unit and the radio frequency signal from the second input amplifying circuit to realize down-conversion of the radio frequency signal to an intermediate frequency signal;
the gain adjusting module is used for attenuating the externally input radio frequency signal according to the third signal;
the attenuation module is used for attenuating the signal output by the gain adjustment module;
the second output adjusting module is used for amplifying the radio frequency signal from the attenuation module.
In some embodiments, the second mixing module comprises: a third selection switch, a plurality of second mixer circuits, and a fourth selection switch;
the input end of the third selection switch is in signal connection with the output end of the second input amplification circuit, a plurality of output ends of the third selection switch are in signal connection with the first input ends of the plurality of second mixing circuits respectively, a plurality of input ends of the fourth selection switch are in signal connection with the output ends of the plurality of second mixing circuits respectively, and the output end of the fourth selection switch is in signal connection with the attenuation module;
second input ends of the second frequency mixing circuits are respectively in signal connection with a plurality of output ends of the local oscillation unit;
the first signal includes a fifth signal, and the fifth signal is a signal used by the control unit to output a control signal to the third selection switch and the fourth selection switch according to an external command;
the third selection switch and the fourth selection switch are configured to select one second mixing circuit from the plurality of second mixing circuits to mix the radio frequency signal and the local oscillation signal from the local oscillation unit according to the fifth signal.
Illustratively, the down-conversion unit inputs 1-7GHz radio frequency signals, and the input power is-77 dBm-17 dBm. The signal is amplified by an amplifier 27, divided into two paths of 1-3GHz and 3-7GHz by a switch 28 of 1 from 2, filtered, mixed, combined by a switch 33 of 1 from 2, low-pass filtered 34, numerically controlled attenuated 35 (for output power consistency calibration), intermediate frequency amplified 36, an attenuation module 11 with a delay stabilizing circuit, and finally output an intermediate frequency signal of 70MHz +5dBm after intermediate frequency amplification 37, band-pass filtering 38 and pi-type attenuation 39.
The second input amplifying circuit, in some application scenarios, is an amplifier 27, which performs amplification of the input radio frequency signal.
The second mixing module comprises two selection switches, namely a 1-out-of-2 switch 28 at the signal input end and a 1-out-of-2 switch 33 at the signal output end, wherein the signal output by the amplifier 27 is fed to the 1-out-of-2 switch 28, and the 1-out-of-2 switch 28 feeds the signal to an up-mixing circuit or a down-mixing circuit, which have substantially the same structure, with the difference that the up-mixing circuit is used for mixing the signal of 1-3GHz, and the down-mixing circuit is used for mixing the signal of 3-7 GHz. The mixer circuit described above is an example, and receives an input signal from the 1-out-of-2 switch 28, and after the signal is fed to the band-pass filter 29 and filtered, the signal output from the band-pass filter 29 and the local oscillator signal output from the local oscillator unit are fed to the mixer 30 and mixed, and the mixer 30 outputs an intermediate frequency signal and feeds the intermediate frequency signal to the 1-out-of-2 switch 33, thereby completing mixing of the input signal.
The gain adjustment module includes, in some application scenarios, a low pass filter 34, a digitally controlled attenuation 35, and an amplifier 36. The intermediate frequency signal output by the second mixing module is first filtered by the low pass filter 34 to remove high frequency spurious signals, then the output intermediate frequency signal is input into the numerical control attenuation 35 to attenuate the intermediate frequency signal, and the intermediate frequency signal output by the numerical control attenuation 35 is sent into the amplifier 36 to finish the amplification of the intermediate frequency signal. The digital controlled attenuation 35 is controlled by the control unit, and is aimed at compensating the difference of different amplification factors of the radio frequency signals with different frequencies by the amplifier 27 and realizing different attenuation coefficients of the signals with different frequencies.
In some application scenarios, the attenuation module 11 with a delay-stable circuit in the down-conversion unit has the same structure and function as the attenuation module 11 with a delay-stable circuit in the up-conversion unit.
In some application scenarios, the second output adjustment module includes an amplifier 37, a band-pass filter 38, and a pi-type attenuation 39, and the radio frequency signal output by the attenuation module 11 with the delay stabilizing circuit is sent to the amplifier 37, amplified by the amplifier 37, sent to the band-pass filter 38, filtered to remove spurious signals, matched by the pi-type attenuation 39 of the impedance matching circuit, and then output a mixed intermediate frequency signal.
Tests prove that the coverage frequency range of the invention can reach 1-7 GHz; the receiving and transmitting are integrated and the receiving and transmitting on-off are independently controlled; the fluctuation of the in-band group delay is less than or equal to 2nS, and the maximum difference of the in-band group delay fluctuation of different modules is less than or equal to 1 nS. The invention adopts the impedance matching technology to realize that the group delay variation is less than or equal to 0.1nS within the maximum gain adjustment range. The invention can realize up-down frequency conversion with broadband, high dynamic and high time delay stability.
According to the broadband up-down frequency conversion device, the up-down frequency conversion units are combined together, and frequency mixing can be performed on the externally input intermediate frequency signals or radio frequency signals according to the external instruction, so that the broadband up-down frequency conversion device is more compact in structure and stronger in function compared with the prior art.
The implementation mode of the broadband up-down frequency conversion device applies an impedance matching technology, a radio frequency channel design technology and a frequency source design technology and has the characteristics of high reliability, wide working bandwidth, complete functions, large dynamic range, high power output consistency, small group delay variation, low price and the like.
The up-conversion unit and the down-conversion unit of the broadband up-conversion and down-conversion device are implemented by the invention, the fluctuation of the in-band group delay mainly depends on the intermediate frequency filter in the frequency conversion unit, and in order to realize that the fluctuation of the group delay in the signal bandwidth is less than 2nS, the up-conversion unit of the invention selects the band-pass filter 2 with group delay balance, and the down-conversion unit selects the band-pass filter 38 with group delay balance. The band-pass filter 2 and the band-pass filter 38 can achieve the in-band group delay fluctuation within 1.5nS by applying a group delay equalization technology, and the impedance matching is carried out through the attenuation networks of the pi-type attenuation 1 and the pi-type attenuation 39 so as to achieve the best group delay fluctuation index in consideration of the deterioration of the group delay fluctuation index after the band-pass filter is cascaded with front and rear devices.
In the implementation mode of the broadband up-down frequency conversion device, the up-down frequency conversion unit and the down-down frequency conversion unit are realized in a segmented mode due to the fact that the radio frequency band is wide, and are realized by selecting a plurality of frequency bands and a plurality of mixers. In order to realize better LO-RF isolation, an active mixing mode with higher isolation is adopted to realize the up-conversion function from the intermediate frequency to the radio frequency, the LO-RF isolation is better than 40dB, and the pressure of an external radio frequency filter is greatly reduced.
The invention provides an implementation mode of a broadband up-down conversion device, a control unit and a broadband up-down conversion device2The C interface receives an external control command, the internal single chip microcomputer performs local oscillation frequency hopping, switch switching, gain stepping adjustment, output power fitting and the like according to the control command, and the power-off memory function is realized by adding an external FLASH.
According to the implementation mode of the broadband up-down frequency conversion device, due to the adoption of the technical scheme, (1) all navigation frequency points in the 1-7GHz bandwidth are integrated, the system is simplified, and the cost is reduced; (2) the group delay variation within the maximum gain (60 dB) adjusting range is less than 0.1nS by utilizing the front and back matching technology of the numerical control attenuator; (3) group delay fluctuation in a signal bandwidth is smaller than 2nS by using group delay equalization and impedance matching technology of a filter; (4) by using a program fitting technology, the consistency of 1-7GHz broadband and high output power can be realized, which can reach +/-0.5 dB, and the labor cost is greatly reduced. The technical progress greatly improves the problems of narrow applicable frequency band and low distance measurement precision of the traditional navigation transceiver.
A second aspect of the embodiments of the present invention provides a broadband up-down conversion control method, as shown in fig. 3, which shows a flowchart of the broadband up-down conversion control method.
The control method for down-conversion over the broadband comprises the following steps:
304, acquiring the amplification factor of the output amplification circuit to signals with different frequencies according to the frequency of the up-conversion;
305, attenuating the radio frequency signal output by the frequency mixing module according to the amplification multiple of the output amplification circuit on the signals with different frequencies;
step 307, selecting a frequency mixing module corresponding to the frequency mixing frequency band according to the down-converted frequency;
308, acquiring the amplification factor of the input amplification circuit to signals with different frequencies according to the frequency of the down-conversion;
In addition, in some application scenarios, the method further includes that the external command includes information characterizing a gain, and the gain is adjusted according to the external command, such as adjusting the gain of the attenuation module in the diagram for the functional block diagram shown in fig. 2.
It should be understood that the sequence numbers of the steps in the above embodiments do not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Fig. 4 is a functional block diagram of a control unit provided in an embodiment of the present invention. As shown in fig. 4, the control unit 410 of this embodiment includes: a processor 400, a memory 401 and a computer program 402 stored in said memory 401 and executable on said processor 400. The processor 400 executes the computer program 402 to implement the above-mentioned operation and maintenance methods and steps of the embodiments of the power metering device, such as steps 301 to 309 shown in fig. 3.
Illustratively, the computer program 402 may be partitioned into one or more modules/units, which are stored in the memory 401 and executed by the processor 400 to implement the present invention.
The control unit 410 may be a computing device such as a desktop computer, a notebook, a palm computer, and a cloud server. The control unit 410 may include, but is not limited to, a processor 400, a memory 401. Those skilled in the art will appreciate that fig. 4 is merely an example of the control unit 410, and does not constitute a limitation of the control unit 410, and may include more or less components than those shown, or combine certain components, or different components, for example, the control unit may also include input-output devices, network access devices, buses, etc.
The Processor 400 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 401 may be an internal storage unit of the control unit 410, such as a hard disk or a memory of the control unit 410. The memory 401 may also be an external storage device of the control unit 410, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, provided on the control unit 410. Further, the memory 401 may also include both an internal storage unit and an external storage device of the control unit 410. The memory 401 is used for storing the computer programs and other programs and data required by the control unit. The memory 401 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit, and the integrated unit may be implemented in a form of hardware, or may be implemented in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the description of each embodiment is focused on, and for parts that are not described or illustrated in detail in a certain embodiment, reference may be made to the description of other embodiments.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/control unit and method may be implemented in other ways. For example, the above-described apparatus/control unit embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the above embodiments may be implemented by driving related hardware with a computer program, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the steps of the above embodiments of the broadband up-down conversion control method may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A broadband up-down conversion device, comprising:
the device comprises an up-conversion unit, a down-conversion unit, a local oscillator unit and a control unit;
the up-conversion unit, the down-conversion unit and the local oscillator unit are respectively in signal connection with the control unit, and the up-conversion unit and the down-conversion unit are in signal connection with the local oscillator unit;
the local oscillator unit is used for receiving an external clock signal and a control signal of the control unit and providing a local oscillator signal for the up-conversion unit or the down-conversion unit;
the up-conversion unit is used for converting the local oscillator signal and an externally input intermediate frequency signal into a radio frequency signal, and the down-conversion unit is used for converting the local oscillator signal and an externally input radio frequency signal into an intermediate frequency signal;
the control unit is used for outputting a first signal for controlling the up-conversion unit or the down-conversion unit to work according to an external command, and outputting a signal for controlling the local oscillator unit to output the local oscillator signal frequency according to the external command.
2. The broadband upconversion and downconversion device according to claim 1, wherein the upconversion unit comprises: the first input signal adjusting module, the first mixing module, the attenuation module and the first output amplifying circuit;
the output end of the first input signal adjusting module and the output end of the local oscillator unit are respectively in signal connection with the first frequency mixing module, the output end of the first frequency mixing module is in signal connection with the input end of the attenuation module, the output end of the attenuation module is in signal connection with the input end of the first output amplifying circuit, and the control unit is in signal connection with the control end of the attenuation module;
the first signal comprises a second signal, and the second signal is a signal which is used for outputting a signal for controlling the first input signal adjusting module according to an external command by the control unit so as to compensate the difference of different amplification factors of the first output amplifying circuit for different frequency signals, so that the power of the radio frequency signals with different frequencies output by the first output amplifying circuit tends to be consistent;
the first input signal adjusting module is used for filtering and amplifying the externally input intermediate frequency signal according to the second signal;
the first frequency mixing module is used for mixing frequency according to the local oscillator signal from the local oscillator unit and the intermediate frequency signal from the input signal adjusting module to realize up-conversion of the intermediate frequency signal to a radio frequency signal;
the attenuation module is used for attenuating the radio frequency signal from the first frequency mixing module;
the first output amplifying circuit is used for amplifying the radio-frequency signal from the attenuation module.
3. The broadband up-down conversion apparatus according to claim 1, wherein the down-conversion unit comprises:
the second input amplifying circuit, the second mixing module, the gain adjusting module, the attenuation module and the second output adjusting module;
the output end of the second input amplifying circuit and the output end of the local oscillator unit are respectively in signal connection with the input end of the second frequency mixing module, the output end of the second frequency mixing module is in signal connection with the input end of the gain adjusting module, the output end of the gain adjusting module is in signal connection with the input end of the attenuation module, and the output end of the attenuation module is in signal connection with the input end of the second output adjusting module;
the second input amplifying circuit is used for amplifying the externally input radio frequency signal;
the first signal comprises a third signal, and the third signal is a signal which is used by the control unit to output and control the attenuation coefficient of the gain adjustment module according to an external command so as to compensate the difference that the second input amplification circuit presents different amplification factors to different frequency signals;
the second frequency mixing module is used for mixing frequency according to the local oscillator signal from the local oscillator unit and the radio frequency signal from the second input amplifying circuit to realize down-conversion of the radio frequency signal to an intermediate frequency signal;
the gain adjusting module is used for attenuating the externally input radio frequency signal according to the third signal;
the attenuation module is used for attenuating the signal output by the gain adjustment module;
the second output adjusting module is used for amplifying the radio frequency signal from the attenuation module.
4. The broadband up-down conversion apparatus according to claim 2 or 3, wherein the attenuation module comprises: the digital-controlled attenuator comprises a first digital-controlled attenuator, an intermediate amplifier, a second digital-controlled attenuator, an input delay matching circuit and an output delay matching circuit;
the input delay matching circuit is connected with the input end of the first numerical control attenuator, the output end of the first numerical control attenuator is connected with the input end of the intermediate amplifier, the output end of the intermediate amplifier is connected with the input end of the second numerical control attenuator, and the output end of the second numerical control attenuator is connected with the input end of the output delay matching circuit;
the input delay matching circuit is used for matching the input impedance and the signal transmission delay of the first numerical control attenuator, the output delay matching circuit is used for matching the output impedance and the signal transmission delay of the second numerical control attenuator, and the intermediate amplifier is used for transmitting signals between the first numerical control attenuator and the second numerical control attenuator so as to avoid time delay change caused by mutual traction.
5. The broadband upconversion and downconversion device according to claim 4, wherein the input delay matching circuit comprises: a first resistor and a first capacitor;
the first end of the first resistor is connected with a power ground, the second end of the first resistor is connected with the first end of the first capacitor, and the second end of the first capacitor is connected with the input end of the first numerical control attenuator; and the connection point of the second end of the first resistor and the first end of the first capacitor is used as a signal input end for receiving the input of signals.
6. The broadband upconversion and downconversion device according to claim 4, wherein the output delay matching circuit comprises: a second resistor and a fourth capacitor;
the second end of the second resistor is connected with a power ground, the first end of the second resistor is connected with the second end of the fourth capacitor, and the first end of the fourth capacitor is connected with the output end of the second digital controlled attenuator; and the connection point of the first end of the second resistor and the second end of the fourth capacitor is used as a signal output end for outputting signals.
7. The broadband upconversion and downconversion device of claim 2, wherein the first mixing module comprises: the mixer circuit comprises a first selection switch, a plurality of first mixer circuits and a second selection switch;
the input end of the first selection switch is in signal connection with the output end of the first input signal adjusting module, a plurality of output ends of the first selection switch are in signal connection with first input ends of the plurality of first mixing circuits respectively, a plurality of input ends of the second selection switch are in signal connection with output ends of the plurality of first mixing circuits respectively, and an output end of the second selection switch is in signal connection with the attenuating module;
the second input ends of the first frequency mixing circuits are respectively in signal connection with the output ends of the local oscillation units;
the first signal comprises a fourth signal, and the fourth signal is a signal which is used by the control unit to output and control the first selection switch and the second selection switch according to an external command;
the first selection switch and the second selection switch are configured to select one first mixing circuit from the plurality of first mixing circuits to mix the intermediate frequency signal and the local oscillation signal from the local oscillation unit according to the fourth signal.
8. The broadband upconversion and downconversion device of claim 3, wherein the second mixing module comprises: a third selection switch, a plurality of second mixer circuits, and a fourth selection switch;
the input end of the third selection switch is in signal connection with the output end of the second input amplification circuit, a plurality of output ends of the third selection switch are in signal connection with the first input ends of the plurality of second mixing circuits respectively, a plurality of input ends of the fourth selection switch are in signal connection with the output ends of the plurality of second mixing circuits respectively, and the output end of the fourth selection switch is in signal connection with the attenuation module;
second input ends of the second frequency mixing circuits are respectively in signal connection with a plurality of output ends of the local oscillation unit;
the first signal includes a fifth signal, and the fifth signal is a signal used by the control unit to output a control signal to the third selection switch and the fourth selection switch according to an external command;
the third selection switch and the fourth selection switch are configured to select one second mixing circuit from the plurality of second mixing circuits to mix the radio frequency signal and the local oscillation signal from the local oscillation unit according to the fifth signal.
9. A broadband up-down frequency conversion control method is characterized by comprising the following steps:
acquiring an external command, wherein the external command comprises information representing variable frequency;
if the external command is an up-conversion command, acquiring the up-conversion frequency;
selecting a frequency mixing module corresponding to the frequency mixing frequency section according to the frequency of the up-conversion;
acquiring the amplification times of the output amplification circuit to different frequency signals according to the frequency of the up-conversion;
attenuating the radio frequency signal output by the frequency mixing module according to the amplification times of the output amplification circuit on the signals with different frequencies;
if the external command is a down-conversion command, acquiring down-conversion frequency;
selecting a frequency mixing module corresponding to the frequency mixing frequency section according to the frequency of the down-conversion;
acquiring the amplification times of the input amplification circuit to different frequency signals according to the frequency of the down-conversion;
and attenuating the intermediate frequency signal output by the frequency mixing module according to the amplification multiple of the input amplification circuit to the signals with different frequencies.
10. A control unit comprising a memory and a processor, the memory storing a computer program operable on the processor, wherein the processor implements the steps of the method as claimed in claim 9 when executing the computer program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210243992.5A CN114337551B (en) | 2022-03-14 | 2022-03-14 | Down-conversion device, control method and control unit on broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210243992.5A CN114337551B (en) | 2022-03-14 | 2022-03-14 | Down-conversion device, control method and control unit on broadband |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114337551A true CN114337551A (en) | 2022-04-12 |
| CN114337551B CN114337551B (en) | 2022-06-21 |
Family
ID=81033564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210243992.5A Active CN114337551B (en) | 2022-03-14 | 2022-03-14 | Down-conversion device, control method and control unit on broadband |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114337551B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944865A (en) * | 2022-05-16 | 2022-08-26 | 河北东森电子科技有限公司 | Design and application method of ultra-wideband Ka-band satellite radio frequency unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105446919A (en) * | 2015-12-03 | 2016-03-30 | 北京振兴计量测试研究所 | PXIe high-speed bus based microwave frequency conversion apparatus |
| CN108988880A (en) * | 2018-10-08 | 2018-12-11 | 北京无线电测量研究所 | A kind of ultra wide band Ka band up-conversion system and method |
| CN213783302U (en) * | 2021-01-15 | 2021-07-23 | 重庆两江卫星移动通信有限公司 | L-band communication simulator transmitting link |
| CN113991969A (en) * | 2021-02-26 | 2022-01-28 | 河北晶禾电子技术股份有限公司 | Multi-frequency point self-adaptive wide-range up-down conversion module |
-
2022
- 2022-03-14 CN CN202210243992.5A patent/CN114337551B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105446919A (en) * | 2015-12-03 | 2016-03-30 | 北京振兴计量测试研究所 | PXIe high-speed bus based microwave frequency conversion apparatus |
| CN108988880A (en) * | 2018-10-08 | 2018-12-11 | 北京无线电测量研究所 | A kind of ultra wide band Ka band up-conversion system and method |
| CN213783302U (en) * | 2021-01-15 | 2021-07-23 | 重庆两江卫星移动通信有限公司 | L-band communication simulator transmitting link |
| CN113991969A (en) * | 2021-02-26 | 2022-01-28 | 河北晶禾电子技术股份有限公司 | Multi-frequency point self-adaptive wide-range up-down conversion module |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114944865A (en) * | 2022-05-16 | 2022-08-26 | 河北东森电子科技有限公司 | Design and application method of ultra-wideband Ka-band satellite radio frequency unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114337551B (en) | 2022-06-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1875621B1 (en) | System and method for dynamic impedance tuning to minimize return loss | |
| CN109061581B (en) | Radar target distance accurate simulation device and method for linear frequency modulation signals | |
| CN113630194A (en) | X-band high-isolation radio frequency transceiving system and channel consistency calibration method thereof | |
| CN108429594B (en) | High-performance channel simulator radio frequency transceiver applied to 5G communication | |
| CN111624587A (en) | Millimeter wave radio frequency integrated front end | |
| CN114337551B (en) | Down-conversion device, control method and control unit on broadband | |
| CN114389636B (en) | Multi-band high-performance signal processing platform | |
| CN104967456A (en) | CPCI bus control type radio-frequency transmission board card and transmitting-receiving board card | |
| CN105446919B (en) | A kind of microwave converter plant based on PXIe high-speed buses | |
| CN114553329B (en) | Vector network analysis system | |
| US6636730B2 (en) | Wideband IF image rejecting receiver | |
| CN105429628A (en) | Frequency spreading device with calibration function, RF signal source and control method thereof | |
| CN109343014B (en) | Apparatus and method for testing T/R component of phased array radar | |
| CN105375919A (en) | Frequency extension device and RF signal system | |
| CN114744999B (en) | Frequency hopping source implementation method and device, frequency hopping source, electronic equipment and storage medium | |
| CN109286449B (en) | Equipment tester for error code test and simulation of satellite transponder | |
| CN106849983A (en) | A kind of millimeter wave transceiving component | |
| CN105471471A (en) | Radio-frequency signal system, radio frequency signal source and frequency expansion device control method | |
| CN108616283A (en) | The anti-interference radio frequency unit of Ka frequency ranges of jump and amplitude limiting processing is solved based on Ka | |
| CN212845922U (en) | Millimeter wave radio frequency integrated front end | |
| CN104967458A (en) | CPCI bus control type radio frequency receiving board card and transceiving board card | |
| CN208128257U (en) | A kind of vector signal generation device based on chip | |
| CN204498071U (en) | X-Ka frequency range upconverter | |
| CN111953302A (en) | Design scheme of EHF frequency band up-converter | |
| CN111225355A (en) | Signal acquisition sensor, and signal processing method and device |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |