CN215379537U - Low intermodulation microwave down-conversion assembly - Google Patents
Low intermodulation microwave down-conversion assembly Download PDFInfo
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- CN215379537U CN215379537U CN202120377248.5U CN202120377248U CN215379537U CN 215379537 U CN215379537 U CN 215379537U CN 202120377248 U CN202120377248 U CN 202120377248U CN 215379537 U CN215379537 U CN 215379537U
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Abstract
The utility model relates to a low intermodulation microwave down-conversion assembly, which comprises a body and a base, wherein the left side and the right side of the body are respectively provided with two channels, the right side above the body is provided with an antenna, the left side of the antenna is provided with the channels, the front surface of the body is uniformly provided with a plurality of fastening screws, the left side inside the body is provided with a frequency mixer, the right side above the frequency mixer is provided with a band-pass filter, the lower side of the band-pass filter is provided with a high-pass filter, so that a microwave isolator is arranged above the right side of the band-pass filter, a microwave bidirectional coupler is arranged below the microwave isolator, a self-adaptive existing compensator is arranged below the microwave bidirectional coupler, the left side and the right side of the base are respectively provided with a second through hole, the inner side above the base is provided with a bottom plate, and four corners inside the base are respectively provided with a fixing bolt; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Description
Technical Field
The utility model belongs to the technical field of low intermodulation microwaves, and particularly relates to a low intermodulation microwave down-conversion component.
Background
The microwave receiving and transmitting system is a vital component in microwave communication, electronic countermeasure, radar, remote control and a plurality of measurement systems and is used as an important core of the receiving and transmitting system, the microwave frequency conversion component plays a critical role in system performance, and the microwave frequency conversion component mainly has the functions of carrying out up-conversion or down-conversion on input signals and outputting signals with different frequencies; therefore, it is necessary to provide a low intermodulation microwave down-conversion module which has a modular design, multiple channels, a small volume, a convenient interface form, and can directly form a transceiving device with a signal processing unit.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a low intermodulation microwave down-conversion component which is in a modular design, has multiple channels, is small in size and convenient in interface form and can directly form a transceiving device with a signal processing unit.
The purpose of the utility model is realized as follows: a low intermodulation microwave down-conversion component comprises a body and a base, wherein two channels are arranged on the left side and the right side of the body, gaskets are arranged on the inner sides of the channels, positioning screws are arranged on the left side and the right side of each gasket, an antenna is arranged on the right side above the body, a channel is arranged on the left side of the antenna, a plurality of fastening screws are uniformly arranged in the front of the body, first through holes are arranged at four corners in the front of the body, a mixer is arranged on the left side inside the body, a band-pass filter is arranged above the right side of the mixer, a high-pass filter is arranged below the band-pass filter, a microwave isolator is arranged above the right side of the band-pass filter, a microwave two-way coupler is arranged below the microwave isolator, and a self-adaptive existing compensator is arranged below the microwave two-way coupler, the base left and right sides all be provided with the second through-hole, base top inboard be provided with the bottom plate, the inboard four corners of base all be provided with fixing bolt.
The positioning screws and the fastening screws are in a cross-shaped structure.
The first through hole and the second through hole are both threaded through holes.
The base is of a convex structure.
The utility model has the beneficial effects that: the utility model is a low intermodulation microwave down-conversion assembly, the channels all adopt N-type connection forms, the connection is convenient and fast, the use is very convenient, in use, the body is placed on a bottom plate on a base, then the body penetrates through a first through hole through a fixing bolt to be fixedly connected with the base, the base and the body are fixed at a target position through a second through hole, and the body can be connected with a signal processing unit through an antenna to form transceiving equipment, so that the practicability is greatly increased, and the transceiving equipment formed by connecting the antenna and the signal processing unit can more comprehensively and efficiently realize transceiving function through a microwave bidirectional coupling device, a self-adaptive existing compensation device and a microwave isolator; the input signal outputs the mixed intermodulation signal to the band-pass filter through the frequency mixer, the band-pass filter inputs the required signal into the high-pass filter after frequency selection, and then the high-pass filter filters all high-frequency signals except the lower side in the frequency mixer, including high-order combined intermodulation, so that the intermodulation with the frequency mixer is avoided being formed again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Drawings
Fig. 1 is a front view of a low intermodulation microwave down-conversion assembly of the present invention.
Fig. 2 is a rear view of a low intermodulation microwave down-conversion assembly of the present invention.
Fig. 3 is a bottom view of a low intermodulation microwave down-conversion assembly of the present invention.
Fig. 4 is a schematic diagram of an internal structure of a low intermodulation microwave down-conversion module according to the present invention.
Fig. 5 is a schematic structural diagram of a base of a low intermodulation microwave down-conversion assembly of the present invention.
Fig. 6 is a top view of a base of a low intermodulation microwave down-conversion assembly of the present invention.
Fig. 7 is a schematic structural diagram of an embodiment 2 of a low intermodulation microwave down-conversion module according to the present invention.
Fig. 8 is a schematic structural diagram of an embodiment 3 of a low intermodulation microwave down-conversion module according to the present invention.
Fig. 9 is a schematic structural diagram of an embodiment 4 of a low intermodulation microwave down-conversion module according to the present invention.
Fig. 10 is a schematic structural diagram of an embodiment 5 of a low intermodulation microwave down-conversion module according to the present invention.
Fig. 11 is a schematic structural diagram of a low intermodulation microwave down-conversion module according to embodiment 6 of the present invention.
In the figure: 1. the device comprises a body 2, a channel 3, a gasket 4, a positioning screw 5, an antenna 6, a fastening screw 7, a first through hole 8, a mixer 9, a band-pass filter 10, a high-pass filter 11, a microwave isolator 12, a microwave bidirectional coupler 13, an adaptive active compensator 14, a base 15, a second through hole 16, a bottom plate 17 and a fixing bolt.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1-11, a low intermodulation microwave down-conversion assembly comprises a body 1 and a base 14, wherein two channels 2 are arranged on the left and right sides of the body 1, gaskets 3 are arranged on the inner sides of the channels 2, positioning screws 4 are arranged on the left and right sides of the gaskets 3, an antenna 5 is arranged on the right side above the body 1, the channel 2 is arranged on the left side of the antenna 5, a plurality of fastening screws 6 are uniformly arranged in the front of the body 1, first through holes 7 are arranged at four corners in the front of the body 1, a mixer 8 is arranged on the left side inside the body 1, a band-pass filter 9 is arranged above the right side of the mixer 8, a high-pass filter 10 is arranged below the band-pass filter 9, a microwave isolator 11 is arranged above the right side of the band-pass filter 9, and a microwave bidirectional coupler 12 is arranged below the microwave isolator 11, the microwave bidirectional coupler is characterized in that a self-adaptive current compensator 13 is arranged below the microwave bidirectional coupler 12, second through holes 15 are formed in the left side and the right side of the base 14, a bottom plate 16 is arranged on the inner side above the base 14, and fixing bolts 17 are arranged at four corners of the inner side of the base 14.
The utility model is a low intermodulation microwave down-conversion assembly, the channel 2 adopts an N-type connection form, the connection is convenient and rapid, the use is very convenient, in use, the body 1 is placed on a bottom plate 16 on a base 14, then the base 14 is fixedly connected with the first through hole 7 through a fixing bolt 17, the base 14 and the body 1 are fixed at a target position through a second through hole 15, and the receiving and transmitting device can be connected with a signal processing unit through an antenna 5 to form receiving and transmitting equipment, the practicability is greatly increased, and the receiving and transmitting function of the receiving and transmitting equipment formed by connecting the antenna 5 and the signal processing unit can be more comprehensively and efficiently realized through a microwave bidirectional coupling device 12, a self-adaptive existing compensating device 13 and a microwave isolator 11; the input signal outputs the mixed intermodulation signal to the band-pass filter 9 through the frequency mixer 8, the band-pass filter 9 inputs the required signal into the high-pass filter 10 after frequency selection, and then the high-pass filter 10 filters all high-frequency signals except the lower side in the frequency mixer 8, including high-order combined intermodulation, so as to avoid forming intermodulation with the frequency mixer 8 again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Example 2
As shown in fig. 1-11, a low intermodulation microwave down-conversion assembly comprises a body 1 and a base 14, wherein two channels 2 are arranged on the left and right sides of the body 1, gaskets 3 are arranged on the inner sides of the channels 2, positioning screws 4 are arranged on the left and right sides of the gaskets 3, an antenna 5 is arranged on the right side above the body 1, the channel 2 is arranged on the left side of the antenna 5, a plurality of fastening screws 6 are uniformly arranged in the front of the body 1, first through holes 7 are arranged at four corners in the front of the body 1, a mixer 8 is arranged on the left side inside the body 1, a band-pass filter 9 is arranged above the right side of the mixer 8, a high-pass filter 10 is arranged below the band-pass filter 9, a microwave isolator 11 is arranged above the right side of the band-pass filter 9, and a microwave bidirectional coupler 12 is arranged below the microwave isolator 11, the microwave bidirectional coupler is characterized in that a self-adaptive current compensator 13 is arranged below the microwave bidirectional coupler 12, second through holes 15 are formed in the left side and the right side of the base 14, a bottom plate 16 is arranged on the inner side above the base 14, and fixing bolts 17 are arranged at four corners of the inner side of the base 14.
For better effect, the positioning screw 4 and the fastening screw 6 are both in a cross-shaped structure.
For better effect, the first through hole 7 and the second through hole 15 are both threaded through holes.
For better effect, the base 14 is in a convex structure.
This embodiment has the same structure as embodiment 1, except that: the left side, the right side and the upper side of the body 1 are respectively provided with two channels 2, the left side below the body 1 is provided with an antenna 5, the embodiment is a dual-channel down-conversion assembly, the channels 2 are both in an N-type connection form, the connection is convenient and rapid, and the use is very convenient, in use, the body 1 is placed on a bottom plate 16 on a base 14, then the body 1 penetrates through a first through hole 7 and is fixedly connected with the base 14 through a fixing bolt 17, the base 14 and the body 1 are fixed at a target position through a second through hole 15, the antenna 5 can be connected with a signal processing unit to form transceiving equipment, the practicability is greatly increased, and the transceiving equipment formed by connecting the antenna 5 with the signal processing unit can be ensured to more comprehensively and efficiently realize transceiving function through a microwave bidirectional coupling device 12, a self-adaptive current compensation device 13 and a microwave isolator 11; the input signal outputs the mixed intermodulation signal to the band-pass filter 9 through the frequency mixer 8, the band-pass filter 9 inputs the required signal into the high-pass filter 10 after frequency selection, and then the high-pass filter 10 filters all high-frequency signals except the lower side in the frequency mixer 8, including high-order combined intermodulation, so as to avoid forming intermodulation with the frequency mixer 8 again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Example 3
As shown in fig. 1-11, a low intermodulation microwave down-conversion assembly comprises a body 1 and a base 14, wherein two channels 2 are arranged on the left and right sides of the body 1, gaskets 3 are arranged on the inner sides of the channels 2, positioning screws 4 are arranged on the left and right sides of the gaskets 3, an antenna 5 is arranged on the right side above the body 1, the channel 2 is arranged on the left side of the antenna 5, a plurality of fastening screws 6 are uniformly arranged in the front of the body 1, first through holes 7 are arranged at four corners in the front of the body 1, a mixer 8 is arranged on the left side inside the body 1, a band-pass filter 9 is arranged above the right side of the mixer 8, a high-pass filter 10 is arranged below the band-pass filter 9, a microwave isolator 11 is arranged above the right side of the band-pass filter 9, and a microwave bidirectional coupler 12 is arranged below the microwave isolator 11, the microwave bidirectional coupler is characterized in that a self-adaptive current compensator 13 is arranged below the microwave bidirectional coupler 12, second through holes 15 are formed in the left side and the right side of the base 14, a bottom plate 16 is arranged on the inner side above the base 14, and fixing bolts 17 are arranged at four corners of the inner side of the base 14.
For better effect, the positioning screw 4 and the fastening screw 6 are both in a cross-shaped structure.
For better effect, the first through hole 7 and the second through hole 15 are both threaded through holes.
For better effect, the base 14 is in a convex structure.
This embodiment has the same structure as embodiment 1, except that: the left side and the right side of the body 1 are respectively provided with five channels 2, the right side below the body 1 and the upper side of the left side of the body 1 are respectively provided with an antenna 5, the embodiment is a four-channel down-conversion assembly, the channels 2 are both in an N-type connection form, the connection is convenient and rapid, the use is very convenient, in use, the body 1 is placed on a bottom plate 16 on a base 14, then the base 14 is fixedly connected with the base 14 through a fixing bolt 17 penetrating through a first through hole 7, the base 14 and the body 1 are fixed at a target position through a second through hole 15, the antenna 5 can be connected with a signal processing unit through the antenna 5 to form transceiving equipment, the practicability is greatly increased, and the transceiving equipment formed by connecting the antenna 5 with the signal processing unit can realize transceiving function more comprehensively and efficiently through a microwave bidirectional coupling device 12, a self-adaptive current compensation device 13 and a microwave isolator 11; the input signal outputs the mixed intermodulation signal to the band-pass filter 9 through the frequency mixer 8, the band-pass filter 9 inputs the required signal into the high-pass filter 10 after frequency selection, and then the high-pass filter 10 filters all high-frequency signals except the lower side in the frequency mixer 8, including high-order combined intermodulation, so as to avoid forming intermodulation with the frequency mixer 8 again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Example 4
As shown in fig. 1-11, a low intermodulation microwave down-conversion assembly comprises a body 1 and a base 14, wherein two channels 2 are arranged on the left and right sides of the body 1, gaskets 3 are arranged on the inner sides of the channels 2, positioning screws 4 are arranged on the left and right sides of the gaskets 3, an antenna 5 is arranged on the right side above the body 1, the channel 2 is arranged on the left side of the antenna 5, a plurality of fastening screws 6 are uniformly arranged in the front of the body 1, first through holes 7 are arranged at four corners in the front of the body 1, a mixer 8 is arranged on the left side inside the body 1, a band-pass filter 9 is arranged above the right side of the mixer 8, a high-pass filter 10 is arranged below the band-pass filter 9, a microwave isolator 11 is arranged above the right side of the band-pass filter 9, and a microwave bidirectional coupler 12 is arranged below the microwave isolator 11, the microwave bidirectional coupler is characterized in that a self-adaptive current compensator 13 is arranged below the microwave bidirectional coupler 12, second through holes 15 are formed in the left side and the right side of the base 14, a bottom plate 16 is arranged on the inner side above the base 14, and fixing bolts 17 are arranged at four corners of the inner side of the base 14.
For better effect, the positioning screw 4 and the fastening screw 6 are both in a cross-shaped structure.
For better effect, the first through hole 7 and the second through hole 15 are both threaded through holes.
For better effect, the base 14 is in a convex structure.
This embodiment has the same structure as embodiment 1, except that: the left side and the right side of the body 1 are respectively provided with five channels 2, the other side of the uppermost channel 2 on the right side of the body 1 is provided with one channel 2, the lower part of the right side of the body 1 is provided with one antenna 5, the embodiment is a five-channel down-conversion assembly, the channels 2 are all in an N-type connection form, the connection is convenient and fast, the use is very convenient, in use, the body 1 is placed on the bottom plate 16 on the base 14, and then fixedly connected with the base 14 through the first through hole 7 by the fixing bolt 17, and the base 14 and the body 1 are fixed at a target position by the second through hole 15, can be connected with the signal processing unit through the antenna 5 to form a receiving and sending device, greatly increases the practicability, the receiving and transmitting function of the receiving and transmitting equipment formed by connecting the antenna 5 and the signal processing unit can be more comprehensively and efficiently realized through the microwave bidirectional coupling device 12, the self-adaptive current compensation device 13 and the microwave isolator 11; the input signal outputs the mixed intermodulation signal to the band-pass filter 9 through the frequency mixer 8, the band-pass filter 9 inputs the required signal into the high-pass filter 10 after frequency selection, and then the high-pass filter 10 filters all high-frequency signals except the lower side in the frequency mixer 8, including high-order combined intermodulation, so as to avoid forming intermodulation with the frequency mixer 8 again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Example 5
As shown in fig. 1-11, a low intermodulation microwave down-conversion assembly comprises a body 1 and a base 14, wherein two channels 2 are arranged on the left and right sides of the body 1, gaskets 3 are arranged on the inner sides of the channels 2, positioning screws 4 are arranged on the left and right sides of the gaskets 3, an antenna 5 is arranged on the right side above the body 1, the channel 2 is arranged on the left side of the antenna 5, a plurality of fastening screws 6 are uniformly arranged in the front of the body 1, first through holes 7 are arranged at four corners in the front of the body 1, a mixer 8 is arranged on the left side inside the body 1, a band-pass filter 9 is arranged above the right side of the mixer 8, a high-pass filter 10 is arranged below the band-pass filter 9, a microwave isolator 11 is arranged above the right side of the band-pass filter 9, and a microwave bidirectional coupler 12 is arranged below the microwave isolator 11, the microwave bidirectional coupler is characterized in that a self-adaptive current compensator 13 is arranged below the microwave bidirectional coupler 12, second through holes 15 are formed in the left side and the right side of the base 14, a bottom plate 16 is arranged on the inner side above the base 14, and fixing bolts 17 are arranged at four corners of the inner side of the base 14.
For better effect, the positioning screw 4 and the fastening screw 6 are both in a cross-shaped structure.
For better effect, the first through hole 7 and the second through hole 15 are both threaded through holes.
For better effect, the base 14 is in a convex structure.
This embodiment has the same structure as embodiment 1, except that: the left side and the right side of the body 1 are respectively provided with eight channels 2, the left side above the body 1 and the upper part of the left side are respectively provided with an antenna 5, the embodiment is a seven-channel down-conversion assembly, the channels 2 are both in an N-type connection form, the connection is convenient and rapid, the use is very convenient, in use, the body 1 is placed on a bottom plate 16 on a base 14, then the body 1 is fixedly connected with the base 14 by penetrating through a first through hole 7 through a fixing bolt 17, then the base 14 and the body 1 are fixed at a target position through a second through hole 15, the antenna 5 can be connected with a signal processing unit to form transceiving equipment, the practicability is greatly increased, and the transceiving equipment formed by connecting the antenna 5 with the signal processing unit can be ensured to more comprehensively and efficiently realize transceiving function through a microwave bidirectional coupling device 12, a self-adaptive current compensation device 13 and a microwave isolator 11; the input signal outputs the mixed intermodulation signal to the band-pass filter 9 through the frequency mixer 8, the band-pass filter 9 inputs the required signal into the high-pass filter 10 after frequency selection, and then the high-pass filter 10 filters all high-frequency signals except the lower side in the frequency mixer 8, including high-order combined intermodulation, so as to avoid forming intermodulation with the frequency mixer 8 again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Example 6
As shown in fig. 1-11, a low intermodulation microwave down-conversion assembly comprises a body 1 and a base 14, wherein two channels 2 are arranged on the left and right sides of the body 1, gaskets 3 are arranged on the inner sides of the channels 2, positioning screws 4 are arranged on the left and right sides of the gaskets 3, an antenna 5 is arranged on the right side above the body 1, the channel 2 is arranged on the left side of the antenna 5, a plurality of fastening screws 6 are uniformly arranged in the front of the body 1, first through holes 7 are arranged at four corners in the front of the body 1, a mixer 8 is arranged on the left side inside the body 1, a band-pass filter 9 is arranged above the right side of the mixer 8, a high-pass filter 10 is arranged below the band-pass filter 9, a microwave isolator 11 is arranged above the right side of the band-pass filter 9, and a microwave bidirectional coupler 12 is arranged below the microwave isolator 11, the microwave bidirectional coupler is characterized in that a self-adaptive current compensator 13 is arranged below the microwave bidirectional coupler 12, second through holes 15 are formed in the left side and the right side of the base 14, a bottom plate 16 is arranged on the inner side above the base 14, and fixing bolts 17 are arranged at four corners of the inner side of the base 14.
For better effect, the positioning screw 4 and the fastening screw 6 are both in a cross-shaped structure.
For better effect, the first through hole 7 and the second through hole 15 are both threaded through holes.
For better effect, the base 14 is in a convex structure.
This embodiment has the same structure as embodiment 1, except that: the left side and the right side of the body 1 are both provided with ten channels 2, the other side of the channel 2 at the lowest part of the left side of the body 1 is provided with one channel 2, the upper part of the left side of the body 1 is provided with one antenna 5, the lower frequency conversion component with ten channels is adopted in the embodiment, the channels 2 are all in an N-type connection form, the connection is convenient and fast, the use is very convenient, in use, the body 1 is placed on the bottom plate 16 on the base 14, and then fixedly connected with the base 14 through the first through hole 7 by the fixing bolt 17, and the base 14 and the body 1 are fixed at a target position by the second through hole 15, can be connected with the signal processing unit through the antenna 5 to form a receiving and sending device, greatly increases the practicability, the receiving and transmitting function of the receiving and transmitting equipment formed by connecting the antenna 5 and the signal processing unit can be more comprehensively and efficiently realized through the microwave bidirectional coupling device 12, the self-adaptive current compensation device 13 and the microwave isolator 11; the input signal outputs the mixed intermodulation signal to the band-pass filter 9 through the frequency mixer 8, the band-pass filter 9 inputs the required signal into the high-pass filter 10 after frequency selection, and then the high-pass filter 10 filters all high-frequency signals except the lower side in the frequency mixer 8, including high-order combined intermodulation, so as to avoid forming intermodulation with the frequency mixer 8 again; the utility model has the advantages of modular design, multiple channels, small volume, convenient interface form and capability of directly forming a transceiver with a signal processing unit.
Claims (4)
1. The utility model provides a low intermodulation microwave down conversion subassembly, it includes body and base, its characterized in that: the microwave isolator comprises a body, wherein two channels are arranged on the left side and the right side of the body, gaskets are arranged on the inner sides of the channels, positioning screws are arranged on the left side and the right side of each gasket, an antenna is arranged on the right side above the body, a channel is arranged on the left side of the antenna, a plurality of fastening screws are uniformly arranged in front of the body, first through holes are arranged at four corners in front of the body, a frequency mixer is arranged on the left side inside the body, a band-pass filter is arranged above the right side of the frequency mixer, a high-pass filter is arranged below the band-pass filter, so that a microwave isolator is arranged above the right side of the band-pass filter, a microwave bidirectional coupler is arranged below the microwave isolator, an adaptive existing compensator is arranged below the microwave bidirectional coupler, second through holes are arranged on the left side and the right side of the base, and a bottom plate is arranged on the inner side above the base, and fixing bolts are arranged at four corners of the inner side of the base.
2. A low intermodulation microwave down conversion assembly as claimed in claim 1, wherein: the positioning screws and the fastening screws are in a cross-shaped structure.
3. A low intermodulation microwave down conversion assembly as claimed in claim 1, wherein: the first through hole and the second through hole are both threaded through holes.
4. A low intermodulation microwave down conversion assembly as claimed in claim 1, wherein: the base is of a convex structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120377248.5U CN215379537U (en) | 2021-02-19 | 2021-02-19 | Low intermodulation microwave down-conversion assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120377248.5U CN215379537U (en) | 2021-02-19 | 2021-02-19 | Low intermodulation microwave down-conversion assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215379537U true CN215379537U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120377248.5U Active CN215379537U (en) | 2021-02-19 | 2021-02-19 | Low intermodulation microwave down-conversion assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN215379537U (en) |
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2021
- 2021-02-19 CN CN202120377248.5U patent/CN215379537U/en active Active
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