CN219247805U - Primary frequency conversion assembly - Google Patents
Primary frequency conversion assembly Download PDFInfo
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- CN219247805U CN219247805U CN202321325839.3U CN202321325839U CN219247805U CN 219247805 U CN219247805 U CN 219247805U CN 202321325839 U CN202321325839 U CN 202321325839U CN 219247805 U CN219247805 U CN 219247805U
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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
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- 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
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Abstract
The utility model discloses a primary frequency conversion assembly, which relates to the technical field of communication and comprises a power supply, a control unit, a primary radio frequency input end state control unit, a radio frequency switch filtering unit, a secondary radio frequency input end state control unit, a local oscillation signal generation unit, a local oscillation signal switch filtering unit and an intermediate frequency output unit, wherein the power supply is connected with the control unit; the power supply provides electric energy for the primary frequency conversion assembly, and the control unit is connected with and controls each unit. The utility model adopts a mode that the multifunctional chip is integrated by a full chip to carry out sectional screening and filtering on the input C-band signal, and then the input C-band signal is amplified and converted, so that the burdens of a channel unit and a local oscillator unit in the down-conversion component are reduced; and the local oscillation signal source is integrated, and the local oscillation end only needs to input a reference signal, so that the local oscillation reverse radiation inhibition and the local oscillation leakage inhibition are realized in the mode.
Description
Technical Field
The utility model relates to the technical field of communication, in particular to a primary frequency conversion assembly.
Background
The typical receiver performs processes such as clipping, amplifying, frequency conversion, filtering on the signal received by the antenna, so as to prompt suppression of interference and clutter from the outside, so that the signal retains enough useful information to meet the requirement of further signal processing. The transmitter needs to mix, filter and amplify the digital signals to obtain microwave signals which are convenient to transmit. A good frequency converter assembly is therefore a key component of a radar system.
Along with the rapid development of microwave hybrid integrated circuits and microwave monolithic integrated circuits and the wide use of thin film processes, a good foundation is laid for the realization of miniaturized frequency converters. Half of the frequency conversion can be divided into one frequency conversion, two frequency conversion, three frequency conversion and the like according to the implementation mode of the receiver.
The traditional C-S band primary frequency conversion down-conversion assembly mostly adopts a discrete SOP chip, so that the whole down-conversion assembly has larger volume, low operation efficiency and great consumption of hardware resources; and the external local oscillation signal is needed to be used, the applicability is poor, and the defects of local oscillation leakage, local oscillation reverse radiation and the like are easily brought.
Disclosure of Invention
The utility model aims to provide a primary frequency conversion assembly, which adopts a multifunctional chip and full chip integration mode to perform sectional screening and filtering on an input C-band signal, and then amplifies and converts the C-band signal, so that the burdens of a channel unit and a local oscillator unit in the down-conversion assembly are reduced; and the local oscillation signal source is integrated, and the local oscillation end only needs to input a reference signal, so that the local oscillation reverse radiation inhibition and the local oscillation leakage inhibition are realized in the mode.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the primary frequency conversion assembly comprises a power supply, a control unit, a primary radio frequency input end state control unit, a radio frequency switch filtering unit, a secondary radio frequency input end state control unit, a local oscillation signal generation unit, a local oscillation signal switch filtering unit and an intermediate frequency output unit; the power supply provides electric energy for the primary frequency conversion assembly, and the control unit is connected with and controls each unit;
the input end of the primary radio frequency input end state control unit is connected with an input signal, the output end of the primary radio frequency input end state control unit is connected with the input end of the radio frequency switch filtering unit, the output end of the radio frequency switch filtering unit is connected with the input end of the secondary radio frequency input end state control unit, the output end of the secondary radio frequency input end state control unit is connected with a mixer, and the output end of the mixer is connected with an intermediate frequency output unit to finally output a signal;
the local oscillation signal generating unit is connected with the local oscillation signal, the output end of the local oscillation signal generating unit is connected with the local oscillation signal switch filtering unit, and the output end of the local oscillation signal switch filtering unit is connected with the mixer.
Further: the primary radio frequency input end state control unit comprises a first single-pole double-throw switch, a first radio frequency amplifier and a second single-pole double-throw switch;
the input end of the first single-pole double-throw switch receives signals, the output end of the first single-pole double-throw switch is connected with the input end of the second single-pole double-throw switch, the other output end of the first single-pole double-throw switch is connected with the input end of the first radio frequency amplifier, the output end of the first radio frequency amplifier is connected with the input end of the second single-pole double-throw switch, and the output end of the second single-pole double-throw switch is connected with the input end of the radio frequency switch filtering unit.
Further: the radio frequency switch filtering unit comprises a first single-pole four-throw switch, four band-pass filters and a second single-pole four-throw switch;
the input end of the first single-pole four-throw switch is connected with the output end of the second single-pole double-throw switch,
the four band-pass filters are connected in parallel with the output end of the first single-pole four-throw switch and the input end of the second single-pole four-throw switch,
and the output end of the second single-pole four-throw switch is connected with the input end of the state control unit of the second-level radio frequency input end.
Further: the second-stage radio frequency input end state control unit comprises a third single-pole double-throw switch, a second radio frequency amplifier, a first numerical control attenuator and a fourth single-pole double-throw switch which are connected in sequence; the input end of the third single-pole double-throw switch is connected with the output end of the second single-pole four-throw switch, the second radio frequency amplifier and the first numerical control attenuator are connected in parallel with the output end of the third single-pole double-throw switch and the input end of the fourth single-pole double-throw switch, and the output end of the fourth single-pole double-throw switch is connected with the input end of the mixer.
Further: the local oscillation signal generating unit comprises a local oscillation phase-locked source chip; the input end of the local oscillator phase-locked source chip receives a 100MHz reference signal, the output end of the local oscillator phase-locked source chip is connected with the input end of the local oscillator signal switch filtering unit, and the frequency range of the signal output by the local oscillator signal switch filtering unit is 5.4 GHz-10.8 GHz.
Further: the local oscillator signal switch filter unit comprises a first local oscillator amplifier, a switch filter chip and a second local oscillator amplifier, wherein the input end of the first local oscillator amplifier is connected with the output end of the local oscillator signal generating unit, the output end of the first local oscillator amplifier is connected with the input end of the switch filter chip, the output end of the switch filter chip is connected with the input end of the second local oscillator amplifier, and the output end of the second local oscillator amplifier is connected with the input end of the mixer.
Further: the intermediate frequency output unit comprises a first intermediate frequency filter, a second digital control attenuator, an intermediate frequency amplifier, a second intermediate frequency filter and a third intermediate frequency filter, wherein the input end of the first intermediate frequency filter is connected with the output end port of the mixer, the output end of the first intermediate frequency filter is connected with the input end of the second digital control attenuator, the output end of the second digital control attenuator is connected with the input end of the intermediate frequency amplifier, the output end of the intermediate frequency amplifier is connected with the input end of the second intermediate frequency filter, the output end of the second intermediate frequency filter is connected with the input end of the third intermediate frequency filter, and the output end of the third intermediate frequency filter outputs signals.
Further: the control unit and the power supply are integrated on a PCB, and the control unit is connected with each unit through a singlechip to realize function control.
Compared with the prior art, the utility model has the following advantages:
1. the utility model adopts a multifunctional chip and full chip integrated mode to down-convert the input C-band signal, segments the input C-band signal to match the band-pass filter, is used for automatically selecting the frequency of the signal passing through the radio frequency filtering unit, and only allows the signal with the frequency range matched with the frequency range allowed to pass through by the band-pass filter; the frequency ranges of the signals allowed to pass through by each band-pass filter are different, so that the C-band signals with different frequencies which are continuously input are distributed, each path only carries out filtering processing on the signals matched with the frequency range allowed to pass through by the band-pass filter, and therefore the burden of the filter can be reduced, and the working efficiency is improved.
2. The utility model integrates the mode of vibration source to further improve the applicability of the component, and can better realize the local oscillation reverse radiation inhibition and local oscillation leakage inhibition, and the numerical control unit can also realize the state selection and gain control of input signals.
Drawings
Fig. 1 is a schematic block diagram of the structure of the present utility model.
Fig. 2 is a schematic circuit structure of an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The embodiment provides a primary frequency conversion assembly, which is suitable for a C-S wave band, and adopts a mode that a multifunctional chip is integrated on a full chip to perform sectional screening and filtering on an input C wave band signal, and then the signal is amplified and converted, so that the burdens of a channel unit and a local oscillator unit in the down-conversion assembly are reduced; and the local oscillation signal source is integrated, and the local oscillation end only needs to input a reference signal, so that the local oscillation reverse radiation inhibition and the local oscillation leakage inhibition are realized in the mode.
As shown in fig. 1, the block diagram is a schematic structural diagram of the present embodiment, and the present embodiment includes a control unit and a power supply, where the control unit is configured to select a switching state of a frequency conversion module, perform gain control on a digitally controlled attenuator, and preset a local oscillation frequency. The power supply is used for supplying power to the local oscillation unit, the radio frequency unit and the intermediate frequency unit in the down-conversion assembly. In the connection mode, the control unit is respectively connected with the primary radio frequency input end state control unit, the radio frequency switch filtering unit, the secondary radio frequency input end state control unit, the local oscillation signal generating unit and the local oscillation signal switch filtering unit; the power supply is respectively connected with the primary radio frequency input end state control unit, the radio frequency switch filtering unit, the secondary radio frequency input end state control unit, the local oscillation signal generating unit, the local oscillation signal switch filtering unit and the control unit.
As shown in fig. 2: in this embodiment, the state control unit of the primary radio frequency input end is composed of a single-pole double-throw switch and an amplifier, the radio frequency signal input end is connected with the single-pole double-throw switch, one of two paths controlled by the single-pole double-throw switch is connected with the single-pole four-throw switch after being connected with the amplifier, and the other path is directly connected with the single-pole four-throw switch to amplify the signal once. The radio frequency switch filtering unit is composed of a single-pole four-throw switch and four band-pass filters, wherein the four paths controlled by the single-pole four-throw switch are respectively provided with one band-pass filter, and the input C-band signals are subjected to sectional screening and filtering. The state control unit of the secondary radio frequency input end comprises a single-pole double-throw switch and a numerical control attenuator, wherein the single-pole double-throw switch is connected with one numerical control attenuator, and controls two paths of the single-pole double-throw switch, one path of the single-pole double-throw switch is directly connected with a filter, the other path of the single-pole double-throw switch is connected with an amplifier and then connected with the filter, and signals are amplified again after being filtered; the radio frequency signal passes through the filter and then enters the mixer to be mixed with the local oscillation signal. The output end of the mixer is connected with a filter, the output end of the filter is connected with an amplifier, the output end of the amplifier is connected with another filter, thus a state control unit of a secondary radio frequency input end is formed by the two filters and the amplifier, and finally, the output signal of a single-pole single-throw switch is connected through a digital control attenuator.
In this embodiment, the frequency range of the C-band signal is 4 ghz-8 ghz, and the frequency conversion component for inputting the C-band signal belongs to bandwidth input. The function of the radio frequency filtering unit is to select a required signal from a plurality of input signals, then to pass the selected signal with a certain frequency through a filter with a corresponding frequency band, to perform corresponding down-conversion processing after amplification, filtering and other processing, and to output a signal conforming to the frequency range of the S band.
In the embodiment, the down-conversion is performed on the input C-band signal by adopting a multifunctional chip and full-chip integrated mode, the input C-band signal is segmented to be matched with a band-pass filter, the band-pass filter is used for automatically selecting frequencies of signals passing through a radio frequency filtering unit, and only signals with the frequency range matched with the frequency range allowed to pass through the band-pass filter are allowed; the frequency ranges of the signals allowed to pass through by each band-pass filter are different, so that the C-band signals with different frequencies which are continuously input are distributed, each path only carries out filtering processing on the signals matched with the frequency range allowed to pass through by the band-pass filter, and therefore the burden of the filter can be reduced, and the working efficiency is improved. On the other hand, the mode of integrating the vibration source further improves the applicability of the component, meanwhile, the local oscillation reverse radiation inhibition and the local oscillation leakage inhibition can be better realized, and the numerical control unit can also realize the state selection and the gain control of the input signals.
To further illustrate the frequency relationship of the entire C-S band down-conversion assembly, the following is specifically described: the frequency range of the input C-band signal is 4.0 GHz-8.0 GHz, the control unit needs to control the local oscillator to output the signal of 6.4 GHz-10.4 GHz by referring to the input signal of 100MHz, and the frequency of the signal output by the intermediate frequency is 2.0 GHz-4.0 GHz, thereby conforming to the frequency band range of the S-band.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The primary frequency conversion assembly is characterized by comprising a power supply, a control unit, a primary radio frequency input end state control unit, a radio frequency switch filtering unit, a secondary radio frequency input end state control unit, a local oscillation signal generation unit, a local oscillation signal switch filtering unit and an intermediate frequency output unit; the power supply provides electric energy for the primary frequency conversion assembly, and the control unit is connected with and controls each unit;
the input end of the primary radio frequency input end state control unit is connected with an input signal, the output end of the primary radio frequency input end state control unit is connected with the input end of the radio frequency switch filtering unit, the output end of the radio frequency switch filtering unit is connected with the input end of the secondary radio frequency input end state control unit, the output end of the secondary radio frequency input end state control unit is connected with a mixer, and the output end of the mixer is connected with an intermediate frequency output unit to finally output a signal;
the local oscillation signal generating unit is connected with the local oscillation signal, the output end of the local oscillation signal generating unit is connected with the local oscillation signal switch filtering unit, and the output end of the local oscillation signal switch filtering unit is connected with the mixer.
2. The primary frequency conversion assembly of claim 1, wherein the primary radio frequency input state control unit comprises a first single pole double throw switch, a first radio frequency amplifier, and a second single pole double throw switch;
the input end of the first single-pole double-throw switch receives signals, the output end of the first single-pole double-throw switch is connected with the input end of the second single-pole double-throw switch, the other output end of the first single-pole double-throw switch is connected with the input end of the first radio frequency amplifier, the output end of the first radio frequency amplifier is connected with the input end of the second single-pole double-throw switch, and the output end of the second single-pole double-throw switch is connected with the input end of the radio frequency switch filtering unit.
3. The primary frequency conversion assembly of claim 2, wherein the radio frequency switch filter unit comprises a first single pole four throw switch, four bandpass filters, a second single pole four throw switch;
the input end of the first single-pole four-throw switch is connected with the output end of the second single-pole double-throw switch,
the four band-pass filters are connected in parallel with the output end of the first single-pole four-throw switch and the input end of the second single-pole four-throw switch,
and the output end of the second single-pole four-throw switch is connected with the input end of the state control unit of the second-level radio frequency input end.
4. The primary frequency conversion assembly of claim 3, wherein the secondary radio frequency input state control unit comprises a third single-pole double-throw switch, a second radio frequency amplifier, a first digitally controlled attenuator, and a fourth single-pole double-throw switch connected in sequence; the input end of the third single-pole double-throw switch is connected with the output end of the second single-pole four-throw switch, the second radio frequency amplifier and the first numerical control attenuator are connected in parallel with the output end of the third single-pole double-throw switch and the input end of the fourth single-pole double-throw switch, and the output end of the fourth single-pole double-throw switch is connected with the input end of the mixer.
5. The primary frequency conversion assembly according to claim 1, wherein the local oscillator signal generation unit comprises a local oscillator phase-locked source chip; the input end of the local oscillator phase-locked source chip receives a 100MHz reference signal, the output end of the local oscillator phase-locked source chip is connected with the input end of the local oscillator signal switch filtering unit, and the frequency range of the signal output by the local oscillator signal switch filtering unit is 5.4 GHz-10.8 GHz.
6. The primary frequency conversion assembly according to claim 1 or 5, wherein the local oscillator signal switching filter unit comprises a first local oscillator amplifier, a switching filter chip and a second local oscillator amplifier, an input end of the first local oscillator amplifier is connected with an output end of the local oscillator signal generating unit, an output end of the first local oscillator amplifier is connected with an input end of the switching filter chip, an output end of the switching filter chip is connected with an input end of the second local oscillator amplifier, and an output end of the second local oscillator amplifier is connected with an input end of the mixer.
7. The primary frequency conversion assembly according to claim 1, wherein the intermediate frequency output unit comprises a first intermediate frequency filter, a second digital attenuator, an intermediate frequency amplifier, a second intermediate frequency filter, and a third intermediate frequency filter, wherein an input end of the first intermediate frequency filter is connected to an output end port of the mixer, an output end of the first intermediate frequency filter is connected to an input end of the second digital attenuator, an output end of the second digital attenuator is connected to an input end of the intermediate frequency amplifier, an output end of the intermediate frequency amplifier is connected to an input end of the second intermediate frequency filter, an output end of the second intermediate frequency filter is connected to an input end of the third intermediate frequency filter, and an output end of the third intermediate frequency filter outputs a signal.
8. The primary frequency conversion assembly according to claim 1, wherein the control unit and the power supply are integrated on a PCB board, and the control unit is connected with each unit through a single chip microcomputer to realize function control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321325839.3U CN219247805U (en) | 2023-05-29 | 2023-05-29 | Primary frequency conversion assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321325839.3U CN219247805U (en) | 2023-05-29 | 2023-05-29 | Primary frequency conversion assembly |
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|---|---|
| CN219247805U true CN219247805U (en) | 2023-06-23 |
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| CN202321325839.3U Active CN219247805U (en) | 2023-05-29 | 2023-05-29 | Primary frequency conversion assembly |
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| CN (1) | CN219247805U (en) |
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- 2023-05-29 CN CN202321325839.3U patent/CN219247805U/en active Active
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