CN210327507U - Frequency conversion assembly for receiving frequency converter - Google Patents
Frequency conversion assembly for receiving frequency converter Download PDFInfo
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- CN210327507U CN210327507U CN201921929827.5U CN201921929827U CN210327507U CN 210327507 U CN210327507 U CN 210327507U CN 201921929827 U CN201921929827 U CN 201921929827U CN 210327507 U CN210327507 U CN 210327507U
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Abstract
The utility model discloses a frequency conversion subassembly for receiving converter, including two the same frequency conversion passageways of way, the frequency conversion passageway including cascaded first amplifier in proper order, high pass filter, first mixer, first attenuator, second band pass filter, the second amplifier, first low pass filter, the second mixer, the second attenuator, the second low pass filter, the third amplifier, the third attenuator, the fourth amplifier, third band pass filter's output is as the output of third filter, first mixer mixes radio frequency signal and the local oscillator signal mixing that first local oscillator produced, the second mixer mixes video signal and the local oscillator signal mixing that the second local oscillator produced. The component obtains the required intermediate frequency through secondary down-conversion, the link gain distribution is balanced, and the matching degree among all devices is good.
Description
Technical Field
The utility model belongs to the technical field of communication, specifically speaking relates to a frequency conversion subassembly for receiving converter.
Background
With the development of communication technology, the application of frequency conversion channels in civil and military fields is becoming wider and wider, and frequency conversion signals become key components of radio communication and radar systems. The modern wireless communication receiving frequency conversion channel needs to have high sensitivity and high linearity, and the requirement on the isolation between channels in the same frequency conversion component is higher and higher, the isolation between the channels influences the interference on signals in the channels, and the greater interference influences the integrity of the signals to cause the loss of the signals.
The invention patent with application number 201710041659.5 discloses an ultra-wideband multichannel receiving frequency conversion assembly, which comprises a control unit, an external clock unit, a calibration source unit, a first local oscillator unit, a second local oscillator unit, a third local oscillator unit, a clock signal source unit and a receiving frequency conversion link unit; the whole structure is divided into two layers, wherein the upper layer comprises a control unit, an external clock unit and a calibration source unit; the lower layer is a first local oscillation unit, a second local oscillation unit, a third local oscillation unit, a clock signal source unit and a receiving frequency conversion link unit. The design of double layers, sub-cavities and high integration level of LTCC is adopted, so that the small-size and multifunctional design concept is guaranteed, the connection relation is adopted at present, when the corresponding function is realized, the link routing is short, the insertion loss is small, the connection between modules is convenient and reliable, and the debugging is simple and convenient due to the design of sub-modules.
The document discloses a receiving frequency conversion link unit, which adopts three times of frequency conversion to realize the down conversion of ultra-wideband radio frequency signals, and adopts a process to achieve the purpose of size reduction, and the link structure is complex.
SUMMERY OF THE UTILITY MODEL
To foretell not enough among the prior art, the utility model provides a frequency conversion subassembly for receiving converter, this subassembly passes through the second grade down conversion and obtains required intermediate frequency, and the link gain distribution is balanced, and the matching degree is good between each device.
In order to achieve the above object, the utility model discloses a solution is: the frequency conversion component is used for receiving the frequency converter and comprises two identical frequency conversion channels, wherein each frequency conversion channel comprises a first amplifier, is connected with the radio frequency input interface and is used for amplifying an accessed radio frequency signal; the high-pass filter is connected with the output end of the first amplifier and is used for carrying out high-pass filtering on the signal after the first amplification and filtering low-frequency clutter in the signal; the first frequency mixer is connected with the output end of the high-pass filter and mixes the high-pass filtered signal with the first local oscillator signal; the first attenuator is connected with the output end of the first mixer and is used for performing first-stage attenuation on the mixed signal; the second band-pass filter is connected with the output end of the first attenuator and is used for performing band-pass filtering on the signal after the first-stage attenuation; the second amplifier is connected with the output end of the second band-pass filter and used for amplifying the signal subjected to band-pass filtering; the first low-pass filter is connected with the output end of the second amplifier and is used for low-pass filtering the signal amplified for the second time; the second frequency mixer is connected with the output end of the first low-pass filter and used for mixing the low-pass filtered signal with a second local oscillator signal; the second attenuator is connected with the output end of the second mixer and is used for carrying out second-stage attenuation on the mixed signal; the second low-pass filter is connected with the output end of the second attenuator and is used for low-pass filtering the signal after the second attenuation; the third amplifier is connected with the output end of the second low-pass filter and used for amplifying the signal subjected to the second low-pass filtering; the third attenuator is connected with the output end of the third amplifier and is used for attenuating the data amplified for the third time; the fourth amplifier is connected with the output end of the third attenuator and is used for amplifying the signal after the third attenuation; and the third band-pass filter is connected with the output end of the fourth amplifier and is used for performing band-pass filtering on the fourth amplified signal, the output of the third band-pass filter is used as the output of a frequency conversion channel, the gain of the frequency conversion channel is 34dB, the component obtains the required intermediate frequency through secondary down-conversion, the link gain distribution is balanced, and the matching degree between all the devices is good.
The radio frequency input interface further comprises a power divider, the power divider divides the input radio frequency signal into 2 paths, the output end of one path of radio frequency signal is connected with a first band-pass filter, the first band-pass filter performs band-pass filtering on the radio frequency signal and then outputs the radio frequency signal, and a first amplifier is connected with the output end of the first band-pass filter. The first band-pass filter performs band-pass filtering on the accessed radio frequency signal, and reduces out-of-band clutter signals carried by the received signal.
The frequency conversion assembly further comprises a first local oscillator and a second local oscillator, wherein a first local oscillator signal generated by the first local oscillator is divided into 2 paths through the local oscillator power divider, each path of signal is respectively input into a first frequency mixer of one path of frequency conversion channel and is mixed with a radio frequency signal, a second local oscillator signal generated by the second local oscillator is divided into 2 paths through the local oscillator power divider, each path of signal is respectively input into a second frequency mixer of one path of frequency conversion channel and is mixed with the radio frequency signal, the same local oscillator is adopted to respectively provide mixing local oscillators for the two frequency conversion channels, the synchronism of the local oscillator signals transmitted to the two paths of channels is guaranteed, and signal errors introduced by the local oscillator signals are reduced.
The first local oscillator and the second local oscillator have the same structure and respectively comprise a frequency source, the frequency source outputs radio frequency signals, and the fourth band-pass filter is connected with the output end of the frequency source and performs band-pass filtering on the radio frequency signals; the local oscillator power divider is connected with the output end of the fourth band-pass filter and divides the signal power after band-pass filtering into two paths; the third low-pass filter is connected with the output end of the fifth amplifier, performs low-pass filtering on the amplified signal, and outputs the filtered radio-frequency signal to the frequency mixer; the frequency sources of the first local oscillator and the second local oscillator generate radio frequency signals with different frequencies, a plurality of channels share the same local oscillator, the local oscillator source signals and signals in a frequency conversion channel and can be mutually interfered, the reverse isolation of the two stages of fifth amplifiers is 30dB, the local oscillator power divider adopts an active local oscillator power divider, the crosstalk of the crosstalk signals passing through the frequency mixer can reach 20dB, the isolation of the 2 power divider to the crosstalk signals is 20dB, the isolation of the low-pass filter to the crosstalk signals is 20dB, when the crosstalk signals finally reach the other channel, the signals are about-130 dBm, the crosstalk is small, and the influence on the signals in the channels is small.
The utility model has the advantages that:
(1) the component obtains the required intermediate frequency through secondary down-conversion, the link gain distribution is balanced, and the matching degree among all devices is good.
Drawings
FIG. 1 is a block diagram of the frequency conversion module of the present invention;
fig. 2 is the schematic diagram of the frequency conversion channel of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the frequency conversion component is used for receiving the frequency converter and comprises two identical frequency conversion channels, wherein each frequency conversion channel comprises a first amplifier, is connected with the radio frequency input interface and is used for amplifying an accessed radio frequency signal; the high-pass filter is connected with the output end of the first amplifier and is used for carrying out high-pass filtering on the signal after the first amplification and filtering low-frequency clutter in the signal; the first frequency mixer is connected with the output end of the high-pass filter and mixes the high-pass filtered signal with the first local oscillator signal; the first attenuator is connected with the output end of the first mixer and is used for performing first-stage attenuation on the mixed signal; the second band-pass filter is connected with the output end of the first attenuator and is used for performing band-pass filtering on the signal after the first-stage attenuation; the second amplifier is connected with the output end of the second band-pass filter and used for amplifying the signal subjected to band-pass filtering; the first low-pass filter is connected with the output end of the second amplifier and is used for low-pass filtering the signal amplified for the second time; the second frequency mixer is connected with the output end of the first low-pass filter and used for mixing the low-pass filtered signal with a second local oscillator signal; the second attenuator is connected with the output end of the second mixer and is used for carrying out second-stage attenuation on the mixed signal; the second low-pass filter is connected with the output end of the second attenuator and is used for low-pass filtering the signal after the second attenuation; the third amplifier is connected with the output end of the second low-pass filter and used for amplifying the signal subjected to the second low-pass filtering; the third attenuator is connected with the output end of the third amplifier and is used for attenuating the data amplified for the third time; the fourth amplifier is connected with the output end of the third attenuator and is used for amplifying the signal after the third attenuation; and the third band-pass filter is connected with the output end of the fourth amplifier and used for performing band-pass filtering on the fourth amplified signal, the output of the third band-pass filter is used as the output of a frequency conversion channel, the gain of the frequency conversion channel is 34dB, the component obtains the required intermediate frequency through two-stage down-conversion, the frequency conversion relationship is IF (IF) -RF-LO, the link gain distribution is balanced, and the matching degree between all devices is good. The device with good amplitude-frequency characteristics is selected, so that the gain flatness is favorably improved, for example, the amplifier flatness is good, and the filter in-band ripple is small.
The radio frequency input interface further comprises a power divider, the power divider divides the input radio frequency signal into 2 paths, the output end of one path of radio frequency signal is connected with a first band-pass filter, the first band-pass filter performs band-pass filtering on the radio frequency signal and then outputs the radio frequency signal, and a first amplifier is connected with the output end of the first band-pass filter. The first band-pass filter performs band-pass filtering on the accessed radio frequency signal, and reduces out-of-band clutter signals carried by the received signal.
The frequency conversion assembly further comprises a first local oscillator and a second local oscillator, wherein the first local oscillator signal generated by the first local oscillator is divided into 2 paths through the local oscillator power divider, each path of signal is respectively input into a first frequency mixer of one path of frequency conversion channel and is mixed with the radio frequency signal, the second local oscillator signal generated by the second local oscillator is divided into 2 paths through the local oscillator power divider, each path of signal is respectively input into a second frequency mixer of one path of frequency conversion channel, the same local oscillator is adopted for mixing the frequency signals and is respectively provided for two frequency conversion channels, the synchronism of the local oscillator signals transmitted to the two paths of channels is guaranteed, and signal errors introduced by the local oscillator signals are reduced.
The first local oscillator and the second local oscillator have the same structure and respectively comprise a frequency source, the frequency source outputs radio frequency signals, and the fourth band-pass filter is connected with the output end of the frequency source and performs band-pass filtering on the radio frequency signals; the local oscillator power divider is connected with the output end of the fourth band-pass filter and divides the signal power after band-pass filtering into two paths; the third low-pass filter is connected with the output end of the fifth amplifier, performs low-pass filtering on the amplified signal, and outputs the filtered radio-frequency signal to the frequency mixer; the frequency sources of the first local oscillator and the second local oscillator generate radio frequency signals with different frequencies, a plurality of channels share the same local oscillator, the local oscillator source signals and signals in a frequency conversion channel and can be mutually interfered, the reverse isolation of the two stages of fifth amplifiers is 30dB, the local oscillator power divider adopts an active local oscillator power divider, the crosstalk of the crosstalk signals passing through the frequency mixer can reach 20dB, the isolation of the 2 power divider to the crosstalk signals is 20dB, the isolation of the low-pass filter to the crosstalk signals is 20dB, when the crosstalk signals finally reach the other channel, the signals are about-130 dBm, the crosstalk is small, and the influence on the signals in the channels is small.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. A frequency conversion subassembly for receiving converter, its characterized in that: the frequency conversion channel comprises a first amplifier, a second amplifier and a frequency conversion unit, wherein the first amplifier is connected with the radio frequency input interface and is used for amplifying an accessed radio frequency signal; the high-pass filter is connected with the output end of the first amplifier and is used for carrying out high-pass filtering on the signal after the first amplification and filtering low-frequency clutter in the signal; the first frequency mixer is connected with the output end of the high-pass filter and mixes the high-pass filtered signal with the first local oscillator signal; the first attenuator is connected with the output end of the first mixer and is used for performing first-stage attenuation on the mixed signal; the second band-pass filter is connected with the output end of the first attenuator and is used for performing band-pass filtering on the signal after the first-stage attenuation; the second amplifier is connected with the output end of the second band-pass filter and used for amplifying the signal subjected to band-pass filtering; the first low-pass filter is connected with the output end of the second amplifier and is used for low-pass filtering the signal amplified for the second time; the second frequency mixer is connected with the output end of the first low-pass filter and used for mixing the low-pass filtered signal with a second local oscillator signal; the second attenuator is connected with the output end of the second mixer and is used for carrying out second-stage attenuation on the mixed signal; the second low-pass filter is connected with the output end of the second attenuator and is used for low-pass filtering the signal after the second attenuation; the third amplifier is connected with the output end of the second low-pass filter and used for amplifying the signal subjected to the second low-pass filtering; the third attenuator is connected with the output end of the third amplifier and is used for attenuating the data amplified for the third time; the fourth amplifier is connected with the output end of the third attenuator and is used for amplifying the signal after the third attenuation; and the third band-pass filter is connected with the output end of the fourth amplifier and is used for performing band-pass filtering on the fourth amplified signal, and the output of the third band-pass filter is used as the output of the frequency conversion channel.
2. The frequency conversion assembly for a receive frequency converter of claim 1, wherein: the radio frequency input interface further comprises a power divider, the power divider divides the input radio frequency signal into 2 paths, the output end of one path of radio frequency signal is connected with a first band-pass filter, the first band-pass filter performs band-pass filtering on the radio frequency signal and then outputs the radio frequency signal, and a first amplifier is connected with the output end of the first band-pass filter.
3. The frequency conversion assembly for a receive frequency converter of claim 1, wherein: the frequency conversion component also comprises a first local oscillator and a second local oscillator, wherein a first local oscillator signal generated by the first local oscillator is divided into 2 paths by the local oscillator power divider, each path of signal is respectively input into a first frequency mixer of one path of frequency conversion channel to be mixed with the radio frequency signal, a second local oscillator signal generated by the second local oscillator is divided into 2 paths by the local oscillator power divider, each path of signal is respectively input into a second frequency mixer of one path of frequency conversion channel to be mixed with the radio frequency signal.
4. The frequency conversion assembly for a receive frequency converter of claim 3, wherein: the first local oscillator and the second local oscillator have the same structure and respectively comprise a frequency source, the frequency source outputs radio frequency signals, and the fourth band-pass filter is connected with the output end of the frequency source and performs band-pass filtering on the radio frequency signals; the local oscillator power divider is connected with the output end of the fourth band-pass filter and divides the signal power after band-pass filtering into two paths; the third low-pass filter is connected with the output end of the fifth amplifier, performs low-pass filtering on the amplified signal, and outputs the filtered radio-frequency signal to the frequency mixer; and the frequency sources of the first local oscillator and the second local oscillator generate radio frequency signals with different frequencies.
5. The frequency conversion assembly for a receive frequency converter of claim 4, wherein: the reverse isolation of the fifth amplifier is 30 dB.
6. The frequency conversion assembly for a receive frequency converter of claim 1, wherein: the gain of the frequency conversion channel is 34 dB.
7. The frequency conversion assembly for a receive frequency converter of claim 4, wherein: the local oscillator power divider adopts an active local oscillator power divider.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921929827.5U CN210327507U (en) | 2019-11-08 | 2019-11-08 | Frequency conversion assembly for receiving frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921929827.5U CN210327507U (en) | 2019-11-08 | 2019-11-08 | Frequency conversion assembly for receiving frequency converter |
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| CN210327507U true CN210327507U (en) | 2020-04-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332873A (en) * | 2020-09-21 | 2021-02-05 | 北京无线电测量研究所 | Broadband power division filtering component |
| CN115065376A (en) * | 2022-07-27 | 2022-09-16 | 成都雷通科技有限公司 | Eight-channel high-power frequency conversion TR component |
| CN116318451A (en) * | 2023-05-23 | 2023-06-23 | 英诺微(成都)电子有限公司 | High-precision high-dynamic radio frequency link calibration system |
-
2019
- 2019-11-08 CN CN201921929827.5U patent/CN210327507U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112332873A (en) * | 2020-09-21 | 2021-02-05 | 北京无线电测量研究所 | Broadband power division filtering component |
| CN115065376A (en) * | 2022-07-27 | 2022-09-16 | 成都雷通科技有限公司 | Eight-channel high-power frequency conversion TR component |
| CN115065376B (en) * | 2022-07-27 | 2022-11-25 | 成都雷通科技有限公司 | Eight-channel high-power frequency conversion TR (transmitter-receiver) assembly |
| CN116318451A (en) * | 2023-05-23 | 2023-06-23 | 英诺微(成都)电子有限公司 | High-precision high-dynamic radio frequency link calibration system |
| CN116318451B (en) * | 2023-05-23 | 2023-08-08 | 英诺微(成都)电子有限公司 | High-precision high-dynamic radio frequency link calibration system |
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