CN116317960A - Frequency conversion module and radio navigation system - Google Patents
Frequency conversion module and radio navigation system Download PDFInfo
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- CN116317960A CN116317960A CN202310586709.3A CN202310586709A CN116317960A CN 116317960 A CN116317960 A CN 116317960A CN 202310586709 A CN202310586709 A CN 202310586709A CN 116317960 A CN116317960 A CN 116317960A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
- H03F3/19—High frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only
- H03F3/195—High frequency amplifiers, e.g. radio frequency amplifiers with semiconductor devices only in integrated circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/24—Frequency-independent attenuators
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention provides a frequency conversion module and a radio navigation system, wherein the frequency conversion module comprises a mixer, at least two stages of radio frequency amplifiers connected in series, a local oscillator, a controller and a digital attenuator; the first input end of the mixer is connected with the radio frequency input end, the output end of the mixer is connected with at least two stages of radio frequency amplifiers in series, and the second input end of the mixer is connected with one end of the local oscillator; the control end of the local oscillator is connected with one end of the controller; the digital attenuator is arranged between the radio frequency amplifiers which are connected in series in at least two stages, and the control end of the digital attenuator is connected with one end of the controller; the controller is used for controlling the local oscillator to generate a sine wave signal of a target frequency when the frequency conversion module works, and adjusting the attenuation value of the digital attenuator based on the target frequency and a preset frequency attenuation value table so as to adjust the flatness of the frequency conversion module. The frequency conversion module provided by the invention can realize accurate adjustment of in-band flatness.
Description
Technical Field
The present invention relates to the field of radio navigation technologies, and in particular, to a frequency conversion module and a radio navigation system.
Background
The radio navigation system has the advantages of short positioning time, high positioning precision, high reliability, no error accumulation and the like, is widely applied to the fields of navigation, aviation, aerospace and the like, and is a preferred scheme of a new generation of navigation system.
In order to realize high-capacity and long-distance information transmission in a radio navigation system, the high-capacity and long-distance information transmission can be realized by a frequency conversion module, and the antenna can be more mobile through frequency conversion in the radio navigation system, which is related to the frequency and the wavelength inversely, and the higher the frequency, the shorter the wavelength, so that the miniaturization of equipment is facilitated. In addition, performance indexes of the frequency conversion module in the radio navigation system have great influence on the accuracy, speed and continuity of radio navigation.
The frequency conversion channel of the frequency conversion module is used as an important component of the microwave radio frequency communication system, and the adjustment precision of the in-band flatness of the channel is an important index for improving the performance of the frequency conversion module. At present, the in-band flatness is realized mainly through adjusting filter matching and amplifying single-chip matching, but the accuracy of adjustment is poor, and the requirement of a radio navigation system on the high in-band flatness of a frequency conversion module cannot be met.
Disclosure of Invention
The embodiment of the invention provides a frequency conversion module and a radio navigation system, which are used for solving the problem that the existing frequency conversion module has higher in-band flatness and cannot meet the requirements of the radio navigation system.
In a first aspect, an embodiment of the present invention provides a frequency conversion module, including: the device comprises a mixer, at least two stages of radio frequency amplifiers connected in series, a local oscillator, a controller and a digital attenuator;
the first input end of the mixer is connected with the radio frequency input end, the output end of the mixer is connected with at least two stages of radio frequency amplifiers in series, and the second input end of the mixer is connected with one end of the local oscillator;
the control end of the local oscillator is connected with one end of the controller;
the digital attenuator is arranged between the radio frequency amplifiers which are connected in series in at least two stages, and the control end of the digital attenuator is connected with one end of the controller;
the controller is used for controlling the local oscillator to generate a sine wave signal of a target frequency when the frequency conversion module works, and adjusting the attenuation value of the digital attenuator based on the target frequency and a preset frequency attenuation value table so as to adjust the flatness of the frequency conversion module; the preset frequency attenuation value table comprises a plurality of preset frequencies of the local oscillator, and each preset frequency has a corresponding relation with the attenuation value of the digital attenuator.
In one possible implementation manner, the preset frequency attenuation value table is obtained based on a frequency power curve and a preset power amplitude of the frequency conversion module in a preset frequency range by performing a flatness test on the frequency conversion module when the digital attenuator is not in operation.
In one possible implementation manner, the preset frequency attenuation value table is that when the attenuation value of the attenuator is 0, the signal source and the network analyzer are adopted to perform in-band flatness test on the frequency conversion module, so as to obtain the power amplitude of the frequency conversion module at each frequency point in the preset frequency range;
determining an attenuation value of the frequency conversion module on each frequency point based on the power amplitude of the frequency conversion module on each frequency point and the preset power amplitude of the frequency conversion module on each frequency point;
and constructing a preset frequency attenuation numerical table of the frequency conversion module based on attenuation values corresponding to all frequency points of the frequency conversion module.
In one possible implementation, the attenuation value of the frequency conversion module at each frequency point is a difference between the power amplitude of the frequency conversion module at each frequency point and the preset power amplitude of the frequency conversion module at each frequency point.
In one possible implementation, the controller is configured to determine an attenuation value of a frequency point in the preset frequency attenuation value table corresponding to the target frequency based on the target frequency and the preset frequency attenuation value table, and to adjust the digital attenuator to operate at the attenuation value.
In one possible implementation manner, the target frequency corresponds to a target frequency point in a preset frequency attenuation value table, where the target frequency point is any frequency point in the preset frequency attenuation value table.
In one possible implementation, the minimum step of the digital attenuator is 0.25dB.
In one possible implementation, the flatness of the frequency conversion module is 0.5dB or less.
In one possible implementation, the frequency conversion module further includes a plurality of filters, a first filter is disposed between the radio frequency input terminal and the mixer, a second filter is disposed between the mixer and the at least two stages of series-connected radio frequency amplifiers, and a third filter is disposed between the at least two stages of series-connected radio frequency amplifiers and the radio frequency output terminal.
In a second aspect, an embodiment of the present invention provides a radio navigation system, including: the frequency conversion module of the first aspect or any implementation manner of the first aspect.
The embodiment of the invention provides a frequency conversion module and a radio navigation system, wherein a digital attenuator is arranged between at least two stages of radio frequency amplifiers which are connected in series, and when the frequency conversion module works normally, a controller controls a local oscillator to generate a signal with a target frequency, and simultaneously adjusts the attenuation value of the digital attenuator based on the target frequency and a preset frequency attenuation value table so as to adjust the in-band flatness of the frequency conversion module. After the in-band flatness is adjusted by hardware, the controller is adopted to control the attenuation value of the digital attenuator through software, so that the in-band flatness of the frequency conversion module is accurately adjusted, and the requirement of a radio navigation system on the high in-band flatness of the frequency conversion module is met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a frequency conversion module according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for determining a preset frequency attenuation value table according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another frequency conversion module 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 the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present 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, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the following description will be made by way of specific embodiments with reference to the accompanying drawings.
As described in the background, the frequency conversion module has in-band flatness requirements in the design. And under the condition that the input signal and the gain of the frequency conversion module are kept unchanged, testing the amplitude values of output power signals corresponding to different frequencies of the frequency conversion module in the effective working frequency bandwidth at the output end, and describing the in-band flatness by using the amplitude difference of the maximum and minimum output power signals. Too much in-band flatness can cause linear distortion of the system, which can result in signal distortion of the transmitted signal after it passes through the frequency conversion module. When the in-band fluctuation exceeds the tolerance range of the receiver, the receiver cannot normally receive and demodulate the outgoing frequency signal, which is equivalent to being affected by strong interference, and this will cause distortion of the radio navigation accuracy and even cause navigation interruption.
After the frequency conversion module is assembled, the impedance of the connection of each device in the link is not matched, so that when the frequency conversion module is not debugged, the in-band flatness index of the frequency conversion module is uneven due to the fact that the impedance is not matched, the difference can reach more than 4db in-band, and the flatness difference is larger as the bandwidth is larger. The flatness difference is generally caused by the impedance mismatch of the filter device and the impedance mismatch of the radio frequency amplifier, and thus, the flatness is adjusted by adjusting the impedance match of the filter, the radio frequency amplifier, and the like in a hardware circuit in conventional debugging. The method for adjusting the flatness by the hardware can only adjust the flatness to be within 1db, and the hardware adjustment can only be carried out in the debugging stage of a product, so that the adjustment flexibility is poor.
In order to solve the problems in the prior art, the embodiment of the invention provides a frequency conversion module and a radio navigation system. The following first describes a frequency conversion module provided by an embodiment of the present invention.
A frequency conversion module is shown in fig. 1 and includes a mixer 20, at least two stages of radio frequency amplifiers, a local oscillator 30, a controller 50 and a digital attenuator 60. The two stages of rf amplifiers are a first rf amplifier 41 and a second rf amplifier 42, respectively.
The mixer 20 has a first input connected to the radio frequency input 10 and an output connected in series with at least two stages of series connected radio frequency amplifiers and a second input connected to one end of the local oscillator 30. The control terminal of the local oscillator 30 is connected to one terminal of the controller 50. The digital attenuator 60 is disposed between at least two stages of serially connected rf amplifiers, and a control terminal of the digital attenuator 60 is connected to one terminal of the controller 50. The ends of at least two stages of series connected rf amplifiers are connected to the rf output 70.
The controller 50 is used for controlling the local oscillator 30 to generate a sine wave signal of a target frequency when the frequency conversion module is in operation, and adjusting the attenuation value of the digital attenuator 60 based on the target frequency and a preset frequency attenuation value table so as to adjust the flatness of the frequency conversion module. The preset frequency attenuation value table includes a plurality of preset frequencies of the local oscillator 30, and each preset frequency has a corresponding relationship with an attenuation value of the digital attenuator 60.
At present, the in-band flatness of the frequency conversion module is mainly adjusted by adjusting the filter and the radio frequency amplifier in terms of hardware, but the adjusting method is low in adjusting precision, and can only be adjusted in a product debugging stage, and cannot be adjusted subsequently, so that on one hand, the adjusting flexibility is poor. On the other hand, the adjustment accuracy is also lower.
In some embodiments, since the operating frequency of the local oscillator 30 is controlled by the controller 50, the operating frequency of the local oscillator 30 and the input frequency are mutually corresponding, and thus, the adjustment of the in-band flatness of the input frequency of the frequency conversion module can be converted into the flatness adjustment of the operating frequency of the local oscillator 30.
In order to further increase the in-band flatness of the frequency conversion module based on hardware adjustment of the in-band flatness, the controller 50 ensures that the in-band flatness can reach 0.5dB by adding a digital attenuator 60 between at least two series-connected radio frequency amplifiers, on the one hand, by controlling the operating frequency of the local oscillator 30 and, on the other hand, by correspondingly controlling the digital attenuator 60 to operate within a determined attenuation value according to the operating frequency of the local oscillator 30 by the controller 50.
In this embodiment, the operating frequency of the local oscillator 30 and the attenuation value of the digital attenuator 60 may be made to correspond by controlling a preset frequency attenuation value table. The preset frequency attenuation numerical table is obtained by performing flatness test on the frequency conversion module based on the frequency power curve of the frequency conversion module in the preset frequency range and the preset power amplitude when the digital attenuator 60 does not work.
For example, as shown in fig. 2, the determining step of the preset frequency attenuation value table may be:
s210, when the attenuation value of the digital attenuator 60 is 0, the signal source and the network analyzer are adopted to carry out in-band flatness test on the frequency conversion module, so as to obtain the power amplitude of the frequency conversion module at each frequency point in the preset frequency range.
When in-band flatness test is performed, the frequency bandwidth of an input end and the power of an input signal are set at a signal source, in a rectangular coordinate system on a scalar network analyzer, an X axis represents frequency, a Y axis represents power, and the relation between output frequency and power amplitude can be seen on the scalar network analyzer.
S220, determining attenuation values of the frequency conversion module on each frequency point based on the power amplitude of the frequency conversion module on each frequency point and the preset power amplitude of the frequency conversion module on each frequency point.
In order to improve the in-band flatness of the frequency conversion module, a preset power amplitude is required to be set for the frequency conversion module, and the preset power amplitude of the frequency conversion module on each frequency point is the same.
And obtaining the power amplitude value of the frequency conversion module on each frequency point in the preset frequency range and the preset power amplitude value through testing, and determining the attenuation value of the frequency conversion module on each frequency point.
In some embodiments, the attenuation value of the frequency conversion module at each frequency point may be a difference between the power amplitude of the frequency conversion module at each frequency point and the preset power amplitude of the frequency conversion module at each frequency point, and based on the difference, a corresponding attenuation value of each frequency point in the preset frequency attenuation value table may be determined.
In some embodiments, the attenuation value of the frequency conversion module at each frequency point may be a product of the power amplitude of the frequency conversion module at each frequency point and a certain weight, and then a difference value of the power amplitude of the frequency conversion module at each frequency point is compared with a preset power amplitude of the frequency conversion module, and based on the difference value, a corresponding attenuation value of each frequency point in the preset frequency attenuation value table can be determined. The weight value can be determined according to the working performance of the frequency conversion module in the use scene.
S230, constructing a preset frequency attenuation numerical table of the frequency conversion module based on attenuation values corresponding to all frequency points of the frequency conversion module.
Each frequency point corresponds to an attenuation value, and a preset frequency attenuation value table can be constructed according to the corresponding relation between the frequency points and the attenuation values.
In some embodiments, since each frequency point in the preset frequency range and the target frequency at which the local oscillator 30 operates are not identical, it is necessary to find a correspondence relationship between each frequency point and the target frequency at which the local oscillator 30 operates.
The target frequency corresponds to a target frequency point in a preset frequency attenuation value table. The target frequency point is any frequency point in a preset frequency attenuation numerical table.
For example, the intermediate frequency signal is 140MHz, the controller 50 controls the local oscillator 30 to generate a signal with a target frequency of 1600MHz, the signal passes through the mixer to generate frequencies of 1460MHz and 1740MHz, and then one of the frequencies can be selected by a filter, for example, 1460MHz is selected by using a low pass rule. Then, when the target frequency of the local oscillator 30 is 1600MHz, the attenuation value is corresponding to the frequency point of 1460MHz. The corresponding relation between the preset frequency of the local oscillator 30 and each frequency point of the frequency conversion module in the preset frequency range can be determined.
To improve the in-band flatness of the conversion module, in some embodiments, the digital attenuator 60 may be set to a minimum step of 0.25dB, at which point the in-band flatness of the conversion module may be within 0.5dB.
At present, when the in-band flatness of the frequency conversion module is adjusted by adopting a traditional hardware matching method, the in-band flatness can only reach 1dB, and the in-band flatness can only be adjusted when the frequency conversion module is debugged, and the in-band flatness can not be adjusted in the later stage. In the invention, by adopting a software adjustment method, the in-band flatness of the input frequency is converted into the flatness adjustment of the working frequency of the local oscillator 30, and by adding the one-stage digital attenuator 60 in the multi-stage cascade radio frequency amplifier, the attenuation value of the digital attenuator 60 corresponds to the working frequency of the local oscillator, thereby realizing the accurate adjustment of the in-band flatness of the frequency conversion module, and the in-band flatness can be adjusted at any time during operation, so that the in-band flatness of the final output radio frequency signal of the frequency conversion module is within 0.5dB.
In some embodiments, the frequency conversion module further comprises a plurality of filters, the first filter is disposed between the radio frequency input terminal and the mixer, the second filter is disposed between the mixer and the at least two stages of series-connected radio frequency amplifiers, and the third filter is disposed between the at least two stages of series-connected radio frequency amplifiers and the radio frequency output terminal.
The following describes a frequency conversion module provided by the present invention in a specific embodiment.
As shown in fig. 3, the frequency conversion module includes a radio frequency input 10, a first filter 81, a mixer 20, a second filter 82, a first radio frequency amplifier 41, a digital attenuator 60, a second radio frequency amplifier 42, a third filter 83, and a radio frequency output 70, which are sequentially connected in series, and is connected to one end of the local oscillator 30 at a second input end of the mixer 20, and a control end of the local oscillator 30 is connected to the controller 50. The minimum step of the digital attenuator 60 is 0.25dB.
Firstly, the attenuation value of the digital attenuator 60 is set to be 0, the in-band flatness of the frequency conversion module is tested, the power amplitude of the frequency conversion module at each frequency point in the working frequency range can be seen on a network analyzer, and then the difference value between the power amplitude of each frequency point and the preset power amplitude is used as the attenuation value corresponding to each frequency point.
Since the preset frequency of the local oscillator 30 does not have a certain corresponding relation to each frequency point obtained by the test, the corresponding relation between each frequency point and the attenuation value needs to be converted into the corresponding relation between the preset frequency of the local oscillator 30 and each attenuation value, so that the preset frequency attenuation value table can be determined according to the relation between all preset frequencies of the local oscillator 30 and all attenuation values.
After the preset frequency attenuation value table is obtained, after the frequency conversion module works normally, the attenuation value of the digital attenuator 60 can be determined according to the target frequency of the operation of the local oscillator 30. In normal operation, the controller 50 first controls the local oscillator 30 to generate a sinusoidal signal at a target frequency, and then sets the attenuation value of the digital attenuator 60 according to the attenuation value corresponding to the target frequency in the preset frequency attenuation value table. Thereby realizing the in-band flatness of the final output radio frequency signal within 0.5dB.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
In a second aspect, the invention also provides a radio navigation system comprising the frequency conversion module of the first aspect or any possible implementation manner of the first aspect.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The frequency conversion module is characterized by comprising a mixer, at least two stages of radio frequency amplifiers connected in series, a local oscillator, a controller and a digital attenuator;
the first input end of the mixer is connected with a radio frequency input end, the output end of the mixer is connected with the radio frequency amplifier which is connected in series with at least two stages, and the second input end of the mixer is connected with one end of the local oscillator;
the control end of the local oscillator is connected with one end of the controller;
the digital attenuator is arranged between the at least two stages of radio frequency amplifiers which are connected in series, and the control end of the digital attenuator is connected with one end of the controller;
the controller is used for controlling the local oscillator to generate a sine wave signal of a target frequency when the frequency conversion module works, and adjusting the attenuation value of the digital attenuator based on the target frequency and a preset frequency attenuation value table so as to adjust the flatness of the frequency conversion module; the preset frequency attenuation value table comprises a plurality of preset frequencies of the local oscillator, and each preset frequency has a corresponding relation with the attenuation value of the digital attenuator.
2. The frequency conversion module according to claim 1, wherein the preset frequency attenuation value table is obtained based on a frequency power curve and a preset power amplitude of the frequency conversion module in a preset frequency range by performing a flatness test on the frequency conversion module when the digital attenuator is not in operation.
3. The frequency conversion module according to claim 2, wherein the preset frequency attenuation value table is that when the attenuation value of the digital attenuator is 0, an in-band flatness test is performed on the frequency conversion module by using a signal source and a network analyzer, so as to obtain a power amplitude value of the frequency conversion module at each frequency point in a preset frequency range;
determining an attenuation value of the frequency conversion module on each frequency point based on the power amplitude of the frequency conversion module on each frequency point and the preset power amplitude of the frequency conversion module on each frequency point;
and constructing a preset frequency attenuation numerical table of the frequency conversion module based on attenuation values corresponding to all frequency points of the frequency conversion module.
4. A frequency conversion module according to claim 3, wherein the attenuation value of the frequency conversion module at each frequency point is the difference between the power amplitude of the frequency conversion module at each frequency point and the preset power amplitude of the frequency conversion module at each frequency point.
5. A frequency conversion module according to claim 3, wherein the controller is configured to determine an attenuation value of a frequency point in the preset frequency attenuation value table corresponding to the target frequency based on the target frequency and the preset frequency attenuation value table, and to adjust the digital attenuator to operate at the attenuation value.
6. The frequency conversion module of claim 5, wherein the target frequency corresponds to a target frequency point in the preset frequency attenuation value table, wherein the target frequency point is any frequency point in the preset frequency attenuation value table.
7. The frequency conversion module of claim 1, wherein a minimum step of the digital attenuator is 0.25dB.
8. The frequency conversion module of claim 7, wherein the flatness of the frequency conversion module is 0.5dB or less.
9. The frequency conversion module according to any one of claims 1 to 8, further comprising a plurality of filters, a first filter being provided between the radio frequency input and the mixer, a second filter being provided between the mixer and the at least two stages of series-connected radio frequency amplifiers, and a third filter being provided between the at least two stages of series-connected radio frequency amplifiers and the radio frequency output.
10. A radio navigation system comprising a frequency conversion module according to any one of claims 1 to 9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202197251U (en) * | 2011-07-21 | 2012-04-18 | 北京瑞德艾迪科技有限公司 | Power amplifying system |
| CN103428157A (en) * | 2012-05-16 | 2013-12-04 | 京信通信系统（中国）有限公司 | Radio-frequency signal control method and device |
| CN113872543A (en) * | 2021-09-30 | 2021-12-31 | 中国船舶重工集团公司第七二三研究所 | Large dynamic power control unit of airborne broadband linear power amplifier |
| CN114050791A (en) * | 2021-11-08 | 2022-02-15 | 扬州海科电子科技有限公司 | Multi-octave broadband frequency conversion assembly |
| CN217904399U (en) * | 2022-06-29 | 2022-11-25 | 南京航天工业科技有限公司 | Broadband frequency source with low harmonic and high power flatness |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202197251U (en) * | 2011-07-21 | 2012-04-18 | 北京瑞德艾迪科技有限公司 | Power amplifying system |
| CN103428157A (en) * | 2012-05-16 | 2013-12-04 | 京信通信系统（中国）有限公司 | Radio-frequency signal control method and device |
| CN113872543A (en) * | 2021-09-30 | 2021-12-31 | 中国船舶重工集团公司第七二三研究所 | Large dynamic power control unit of airborne broadband linear power amplifier |
| CN114050791A (en) * | 2021-11-08 | 2022-02-15 | 扬州海科电子科技有限公司 | Multi-octave broadband frequency conversion assembly |
| CN217904399U (en) * | 2022-06-29 | 2022-11-25 | 南京航天工业科技有限公司 | Broadband frequency source with low harmonic and high power flatness |
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