CN213244804U - Novel electromagnetic compatibility digital broadcast television transmitter - Google Patents
Novel electromagnetic compatibility digital broadcast television transmitter Download PDFInfo
- Publication number
- CN213244804U CN213244804U CN202120766109.1U CN202120766109U CN213244804U CN 213244804 U CN213244804 U CN 213244804U CN 202120766109 U CN202120766109 U CN 202120766109U CN 213244804 U CN213244804 U CN 213244804U
- Authority
- CN
- China
- Prior art keywords
- power amplifier
- amplifier unit
- transmitter
- unit frame
- conductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The utility model discloses a novel electromagnetic compatibility digital broadcast television transmitter belongs to transmitter electromagnetic compatibility technical field. The transmitter comprises a power amplifier unit, wherein a power amplifier and a shielding bin are arranged in the power amplifier unit, the power amplifier is connected with a radio frequency output connector, an electric rubber plate is arranged between the radio frequency output connector and the outer wall of the power amplifier unit, the power amplifier unit further comprises a cover plate I and a base, a power amplifier unit frame is connected between the cover plate I and the base, a first conductive cotton sliver is arranged between the power amplifier unit frame and the cover plate I, and a second conductive cotton sliver is arranged between the power amplifier unit frame and the base. The utility model discloses utilize electrically conductive silver to fill the gap between power amplifier unit frame and the apron and the gap between power amplifier unit frame and the base to guaranteed the sealing of whole power amplifier unit frame, the electromagnetic leakage that significantly reduces suppresses and reduces the electromagnetism of power amplifier unit to external equipment and harass the book, and the external environment is disturbed the electromagnetism of power amplifier unit.
Description
Technical Field
The utility model relates to a transmitter electromagnetic compatibility technical field, especially a novel electromagnetic compatibility digital broadcast television transmitter.
Background
The information is convenient and enriches the daily life of people, and electromagnetic waves which transmit the information and are ubiquitous surround our cities. Some of the electromagnetic waves are emitted by various television and broadcast transmitters. Places where a plurality of television and broadcast transmitters are placed, such as a machine room of a television station, are often places where electromagnetic wave energy is enriched.
However, the high intensity electromagnetic wave energy also produces a great deal of electromagnetic wave pollution, which seriously affects the surrounding environmental quality and endangers the health of people. Meanwhile, the transmitter itself may be interfered by external electromagnetic wave energy, which affects its normal operation.
SUMMERY OF THE UTILITY MODEL
The invention of the utility model aims to: aiming at the problem of leakage of electromagnetic waves of a transmitter in the prior art, a novel electromagnetic compatibility digital broadcast television transmitter is provided.
In order to realize the purpose, the utility model discloses a technical scheme be:
a novel electromagnetic compatibility digital broadcast television transmitter comprises a power amplifier unit, wherein the power amplifier unit comprises a power amplifier;
the power amplifier unit further comprises a cover plate I and a base, a power amplifier unit frame is connected between the cover plate I and the base, a conductive cotton strip I is arranged between the power amplifier unit frame and the cover plate I, and a conductive cotton strip II is arranged between the power amplifier unit frame and the base;
the power amplifier is characterized in that a shielding bin is arranged in the power amplifier unit, the power amplifier is arranged in the shielding bin and connected with a radio frequency output connector, the radio frequency output connector is connected onto the outer side wall of the power amplifier unit frame, and an electric rubber plate is arranged at the joint of the radio frequency output connector and the outer side wall of the power amplifier unit frame.
The utility model provides a novel electromagnetic compatibility digital broadcast television transmitter adopts above-mentioned structure, and the shielding storehouse can block most electromagnetic wave that power amplifier sent to the electromagnetic wave energy that greatly reduced power amplifier leaked.
On the other hand, corresponding anti-leakage measures are also taken for the whole power amplifier unit, namely, conductive cotton slivers are arranged between the power amplifier unit frame and the base and between the power amplifier unit frame and the cover plate, and the gaps between the power amplifier unit frame and the cover plate and the gaps between the power amplifier unit frame and the base are filled by the conductive cotton slivers, so that the whole power amplifier unit is ensured to be sealed, and the leakage of electromagnetic waves is greatly reduced.
In addition, an electric rubber plate is arranged between the radio frequency output port connector and the outer wall of the power amplification unit, and the electric rubber plate deforms under pressure to ensure that the radio frequency output port connector and the power amplification unit are connected and conduct electricity to form a whole without gaps, so that an electromagnetic wave overflow barrier is formed.
In summary, the following steps: the novel electromagnetic compatibility digital broadcast television transmitter can reduce the leakage amount of electromagnetic waves of the transmitter to the environment, and inhibit and reduce the interference of electromagnetic disturbance in the transmitter to external equipment.
As the preferred scheme of the utility model, be equipped with the shielding lid in the power amplifier unit, the shielding lid with the power amplifier unit inner wall is connected, and with the shielding lid with enclose power amplifier unit bottom the shielding storehouse.
As the utility model discloses a preferred scheme still includes the synthesizer, the synthesizer includes cavity and apron seted up flutedly on the contact surface of cavity and apron, recess internally mounted has the conductive rubber strip.
As the preferred scheme of the utility model, the synthesizer surface still includes the connector, the connector is equipped with the ring channel, be equipped with the conductive rubber strip in the ring channel.
Adopt above-mentioned structure, because the conductive rubber strip has certain electrically conductive function to having carried out inseparable laminating between messenger's cavity and the apron, forming a whole and being similar to a great shielding box, making inside electromagnetic wave be difficult for revealing and look into the external world, and then reduced the volume of revealing of electromagnetic wave, to the connector produce the place in gap easily the same, adopted the conductive rubber strip to seal the processing.
As the utility model discloses an optimal scheme still includes the shielding rack, the shielding rack includes business turn over wind passageway, cabinet door and the cabinet body, the department of turning over of cabinet door adds and is equipped with electrically conductive silver three.
By adopting the structure, the electromagnetic wave quantity leaked from the gap at the turnover position between the cabinet door and the cabinet body can be further limited.
As the preferred scheme of the utility model, the business turn over wind passageway is installed the waveguide window.
By adopting the structure, the whole shielding cabinet can be ventilated, electromagnetic leakage can be avoided, and external electromagnetic interference can be prevented.
As the preferred scheme of the utility model, the position that the bottom of shielding rack is close to the waveguide window is equipped with power filter.
By adopting the structure, the filter isolates the system from the external environment, and the interference generated by the filter and the external environment is mutually rejected and does not influence each other.
As a preferred scheme of the utility model, a back adhesive is arranged between the first conductive sliver and the power amplifier unit frame, and the first conductive sliver is integrally covered with a metal mesh;
and/or the presence of a gas in the gas,
a back adhesive is arranged between the second conductive cotton strip and the power amplifier unit frame, and the second conductive cotton strip is integrally covered with a metal mesh;
and/or the presence of a gas in the gas,
and a back adhesive is arranged between the third conductive cotton strip and the cabinet door, and the third conductive cotton strip is integrally covered with a metal net.
By adopting the structure, the first conductive cotton strip, the second conductive cotton strip and the third conductive cotton strip can be better adhered to the surfaces of the devices, and the metal mesh is covered on the cotton strips and is communicated with the cover plate and the base to conduct electricity, so that a large shielding box is formed. Thus, the electromagnetic wave energy leakage can be reduced to the maximum extent.
As the preferred scheme of the utility model, power amplifier unit and synthesizer all set up in the shielding rack.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. by adopting the structure, the shielding bin can block most of electromagnetic waves emitted by the power amplifier, so that the energy of the electromagnetic waves leaked by the power amplifier is greatly reduced; on the other hand, corresponding anti-leakage measures are also taken for the whole power amplifier unit, namely, conductive cotton slivers are arranged between the power amplifier unit frame and the base and between the power amplifier unit frame and the cover plate, and the gaps between the power amplifier unit frame and the cover plate and the gaps between the power amplifier unit frame and the base are filled by the conductive cotton slivers, so that the whole power amplifier unit is ensured to be sealed, and the leakage of electromagnetic waves is greatly reduced. In addition, an electric rubber plate is arranged between the radio frequency output port connector and the outer wall of the power amplification unit, and the electric rubber plate deforms under pressure to ensure that the radio frequency output port connector and the power amplification unit are connected and conduct electricity to form a whole without gaps, so that an electromagnetic wave overflow barrier is formed. Therefore, the novel electromagnetic compatibility digital broadcast television transmitter can reduce the leakage amount of electromagnetic waves of the transmitter to the environment, and inhibit and reduce the interference of electromagnetic disturbance in the transmitter to external equipment.
2. The utility model discloses in, cabinet door and cabinet body turn over a department and also add and be equipped with electrically conductive silver, the electromagnetic wave volume that the gap that can further restriction turn over a department between cabinet door and the cabinet body leaked.
Drawings
Fig. 1 is a schematic diagram of a top view structure of a power amplifier unit in the transmitter of the present invention;
fig. 2 is a schematic diagram of a front view structure of a power amplifier unit in the transmitter of the present invention;
fig. 3 is a schematic left-view structural diagram of a power amplifier unit in the transmitter of the present invention;
fig. 4 is a schematic diagram of a top view of a synthesizer according to the present invention;
fig. 5 is a schematic diagram of a front view structure of the synthesizer of the present invention;
FIG. 6 is a schematic structural view of the electric rubber sheet of the present invention;
fig. 7 is a schematic front view of the shielding cabinet of the present invention;
fig. 8 is a schematic top view of the shielding cabinet of the present invention;
the labels in the figure are: 1-a radio frequency output port connector, 2-a shielding bin, 201-a power amplifier, 202-a shielding cover, 3-a power amplifier unit framework, 4-a first conductive cotton strip, 401-a second conductive cotton strip, 5-a first cover plate, 6-a base, 7-an electric rubber plate, 8-a synthesizer, 801-a cavity, 802-a second cover plate, 9-a groove, 10-a conductive rubber strip, 11-a connector, 12-a cabinet door, 13-a cabinet body, 14-an air inlet and outlet channel, 15-a waveguide window, 16-a third conductive cotton strip and 17-a power filter.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
Referring to fig. 1-3, the present invention provides a novel electromagnetic compatibility digital broadcast television transmitter, which comprises a power amplifier unit, a power amplifier 201 and a shielding bin 2 may be disposed in the power amplifier unit, the shielding bin 2 may preferably be a shielding cover 202, the shielding cover 202 is required to cover the whole upper portion of the power amplifier 201, the material of the shielding cover 202 is preferably aluminum, or other materials capable of preventing electromagnetic wave leakage, the outer wall of the power amplification unit is provided with a radio frequency output port connector 1, specifically, the radio frequency output port connector 1 is detachably connected to the outer wall of the power amplification unit, an electric rubber plate 7 is arranged at the joint of the radio frequency output port connector 1 and the outer side wall of the power amplifier unit frame 3, the radio frequency output port connector 1 and the power amplifier unit are sealed mutually, and the leakage of electromagnetic waves at the position is greatly reduced;
as shown in fig. 1, the power amplifier unit further includes a first cover plate 5 and a base 6, a power amplifier unit frame 3 is connected between the first cover plate 5 and the base 6, a first conductive cotton strip 4 is arranged between the power amplifier unit frame 3 and the first cover plate 5, and a second conductive cotton strip 401 is arranged between the power amplifier unit frame 3 and the base 6.
With the above structure, the material of the shielding cover 202 may preferably be aluminum, and the aluminum shielding cover 202 may block the electromagnetic waves emitted by the power amplifier to a certain extent, so as to greatly reduce the energy of the electromagnetic waves leaked by the power amplifier.
On the other hand, corresponding anti-leakage measures are also taken for the whole power amplifier unit, namely, a first conductive cotton strip 4 and a second conductive cotton strip 401 are arranged between the power amplifier unit frame 3 and the base 6 and between the power amplifier unit frame 3 and the cover plate 5 respectively, and gaps between the power amplifier unit frame 3 and the cover plate 5 and gaps between the power amplifier unit frame 3 and the base 6 are respectively filled by utilizing the first conductive cotton strip 4 and the second conductive cotton strip 401, so that the sealing of the whole power amplifier unit structure is ensured, and the electromagnetic wave leakage quantity of the internal parts of the power amplifier unit which are leaked outside is greatly reduced.
In addition, an electric rubber plate 7 is arranged between the radio frequency output port connector and the outer wall of the power amplification unit, and the electric rubber plate 7 deforms under pressure to ensure that the radio frequency output port connector 1 is connected with the power amplification unit and is conductive, so that the radio frequency output port connector and the power amplification unit are integrated without gaps, and an electromagnetic wave overflow barrier is formed.
In summary, the following steps: the novel electromagnetic compatible digital broadcast television transmitter can be used for reducing the leakage amount of electromagnetic waves of the transmitter to the environment, inhibiting and reducing the interference of electromagnetic disturbance in the transmitter to external equipment, and can resist and reduce the electromagnetic disturbance of the external environment to a transmitter power amplification unit.
Preferably, in this embodiment, the metal nets are coated on the first conductive tampon 4 and the second conductive tampon 401, and the metal nets are coated on the tampons and are connected with the cover plate and the base to conduct electricity, so as to form a large shielding box, thereby reducing the electromagnetic wave energy leakage to the maximum extent; and the back glue is arranged between the power amplifier unit frame and each of the first conductive cotton strip 4 and the second conductive cotton strip 401, and the first conductive cotton strip 4 and the second conductive cotton strip 401 can be better adhered to the power amplifier unit frame 3 by covering the back glue.
Preferably, the connection cables are high-quality cables having 150dB attenuation to radio frequency radiation, and the connectors connected with the devices are provided with mechanical locking devices, namely screw thread locking.
Preferably, in this embodiment, the electric rubber plate 7 is sheet-shaped, and is square as a whole, and the middle part of the electric rubber plate is a circular through hole, so that the tail part of the connector can pass through the through hole and be connected with the printed board in the box body.
Example 2
As shown in fig. 4-6, based on embodiment 1, it is further optimized that the electromagnetic wave energy electromagnetic wave.
Because the conductive rubber strip 10 has a certain conductive function, and the cavity 801 and the second cover plate 802 are tightly attached to each other, a larger shielding box is formed integrally, so that internal electromagnetic waves are not easy to leak to the outside, the leakage amount of the electromagnetic waves is reduced, and the conductive rubber strip 10 is also adopted for sealing the position of the connecting port where a gap is easily generated.
Preferably, the outer surface of the synthesizer 8 further includes a connection port 11, and in order to obtain a better electromagnetic wave leakage prevention effect, an annular groove may be further disposed on the connection port 11, a conductive rubber strip 10 is disposed in the annular groove, where the conductive rubber strip 10 has the same effect as the conductive rubber strip 10 in the groove 9.
Example 3
As shown in fig. 1, 7 and 8, based on embodiment 1, it is further optimized that the shielding cabinet further includes a shielding cabinet, where the shielding cabinet includes an air inlet and outlet channel 14, a cabinet door 12 and a cabinet body 13, a third conductive tampon 16 is additionally installed at a turning position of the cabinet door 12, the turning position of the cabinet door 12 will be attached to the cabinet body 13, and the function of the third conductive tampon 16 is the same as that of the first conductive tampon 4, so as to further ensure the sealing of the whole shielding cabinet and prevent the leakage of electromagnetic waves.
Preferably, in this embodiment, the air inlet and outlet channel is provided with a waveguide window 15, and the waveguide window 15 can reduce the electromagnetic wave energy by 60dB between 10MHz and 1G. The attenuation between 1G and 10G can be reduced by 40dB, ventilation can be realized when the shielding cabinet is used for shielding the cabinet, electromagnetic leakage can be avoided, and external electromagnetic interference can be prevented.
Preferably, in the embodiment, in terms of suppressing and reducing electromagnetic disturbance to external devices generated by a power supply in the transmitter and disturbance influence to the system generated by the external power supply, a scheme is further optimized, in which a power supply filter 17 is adopted, the power supply filter 17 isolates the system from the external environment, and respective interferences generated by the power supply filter 17 and the external environment are mutually rejected from the door of the system, so that the mutual influences are not caused.
Preferably, as the present embodiment, not only the third conductive sliver 16 is added between the cabinet door 12 and the cabinet body 13, but also all the door leaves to be opened and closed are in forced contact with the cabinet body, and the third conductive sliver 16 is added. The folded edge of the cabinet body is overlapped with the door leaf in a closed state by 10MM, so that the cabinet body is forced to be in contact with the conductive cotton sliver additionally arranged on the door.
Through the various means and modes, the whole system is ensured to meet the electromagnetic compatibility requirement of the transmitter in the national standard GB/T28435-2012. Meanwhile, various electromagnetic shielding and electromagnetic disturbance isolating works are well done in the system, the influence of external electromagnetic waves on the system is greatly reduced under the protection of an electromagnetic shielding cabinet, and the electromagnetic disturbance resisting capability of the system is greatly improved.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A novel electromagnetic compatibility digital broadcast television transmitter comprises a power amplifier unit, the power amplifier unit comprises a power amplifier (201), and is characterized in that,
the power amplifier unit further comprises a cover plate I (5) and a base (6), a power amplifier unit frame (3) is connected between the cover plate I (5) and the base (6), a conductive cotton strip I (4) is arranged between the power amplifier unit frame (3) and the cover plate I (5), and a conductive cotton strip II (401) is arranged between the power amplifier unit frame (3) and the base (6);
be equipped with in the power amplifier unit and shield storehouse (2), power amplifier (201) set up in shield the storehouse, power amplifier (201) are connected with radio frequency output connector (1), radio frequency output connector (1) is connected on the lateral wall of power amplifier unit frame (3), the junction of radio frequency output connector (1) and the lateral wall of power amplifier unit frame (3) is equipped with electric rubber sheet (7).
2. The novel electromagnetic compatibility digital broadcast television transmitter according to claim 1, characterized in that a shielding cover (202) is arranged in the power amplifier unit, the shielding cover (202) is connected with the inner wall of the power amplifier unit, and the shielding cover (202) and the bottom of the power amplifier unit enclose the shielding bin (2).
3. The novel electromagnetic compatibility digital broadcast television transmitter according to claim 1, characterized by further comprising a synthesizer (8), wherein the synthesizer (8) comprises a cavity (801), one end of the cavity (801) is arranged in an open manner, the open end of the cavity (801) is covered with a second cover plate (802), a groove (9) is formed in a contact surface between the cavity (801) and the second cover plate (802), at least two conductive rubber strips (10) are installed in the groove (9), and all the conductive rubber strips (10) are circumferentially arranged along the open end of the cavity (801).
4. The transmitter of claim 3, wherein the outer wall of the cavity (801) is provided with a connector (11) and an annular groove, the annular groove is sleeved outside the connector (11), and the annular groove is internally provided with a conductive rubber strip (10).
5. The transmitter of claim 3 or 4, wherein the power amplifier unit and the synthesizer (8) are both disposed in a shielded cabinet.
6. The transmitter of claim 1, further comprising a shielding cabinet, wherein the shielding cabinet comprises an air inlet/outlet channel (14), a cabinet door (12) and a cabinet body (13), the cabinet door (12) is provided with a third conductive cotton strip (16), and the air inlet/outlet channel (14) is located at the bottom of the cabinet body (13).
7. The transmitter of claim 6, wherein the air inlet/outlet channel (14) is fitted with a waveguide window (15).
8. The transmitter of claim 7, wherein a power filter (17) is disposed at the bottom of the cabinet (13) near the waveguide window (15).
9. The new type of EMC DTV transmitter of any one of claims 6-8,
a back adhesive is arranged between the first conductive cotton strip (4) and the power amplifier unit frame (3), and the first conductive cotton strip (4) is integrally covered with a metal mesh;
and/or the presence of a gas in the gas,
a back adhesive is arranged between the second conductive cotton strip (401) and the power amplifier unit frame (3), and the second conductive cotton strip (401) is integrally covered with a metal mesh;
and/or the presence of a gas in the gas,
and a back adhesive is arranged between the third conductive cotton strip (16) and the cabinet door (12), and the third conductive cotton strip (16) is integrally covered with a metal mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120766109.1U CN213244804U (en) | 2021-04-15 | 2021-04-15 | Novel electromagnetic compatibility digital broadcast television transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120766109.1U CN213244804U (en) | 2021-04-15 | 2021-04-15 | Novel electromagnetic compatibility digital broadcast television transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213244804U true CN213244804U (en) | 2021-05-18 |
Family
ID=75883355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120766109.1U Active CN213244804U (en) | 2021-04-15 | 2021-04-15 | Novel electromagnetic compatibility digital broadcast television transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213244804U (en) |
-
2021
- 2021-04-15 CN CN202120766109.1U patent/CN213244804U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206274709U (en) | One kind electromagnetic shielding optical module | |
| CN205005229U (en) | Terminal with microphone | |
| CN213244804U (en) | Novel electromagnetic compatibility digital broadcast television transmitter | |
| CN201374047Y (en) | Electromagnetic-shielding sound wave touch screen | |
| CN209517223U (en) | Electronic equipment | |
| CN206196248U (en) | Double shielding case | |
| CN207011213U (en) | A kind of shielded box | |
| CN215818522U (en) | Pickup structure assembly and electronic equipment | |
| CN214706654U (en) | Novel shielding noise reduction cabinet | |
| CN201153363Y (en) | Electromagnetic shielding device for data interface | |
| CN210518361U (en) | Mobile phone evidence obtaining device | |
| CN210178037U (en) | Machine room with electromagnetic wave shielding structure | |
| CN207519065U (en) | The screening cover and installs case of PCB circuit board | |
| CN210840536U (en) | Electromagnetic shielding cabinet | |
| CN202713389U (en) | Handset box having shielding function | |
| CN204031724U (en) | The casing of band shielding sound insulation function | |
| CN221395276U (en) | Microwave shielding container door | |
| CN209527014U (en) | Dual-layer sealing device | |
| CN208338207U (en) | Radome structure | |
| CN206711805U (en) | Keyboard case for industrial control equipment | |
| CN206773027U (en) | A kind of individual layer radio-frequency electromagnetic shielded box for carrying monitoring | |
| CN206302682U (en) | Radio-frequency shielding fence | |
| CN205910232U (en) | Construction improvement's shielded cell | |
| CN209626933U (en) | A kind of electromagnetic sealing gum cover | |
| CN219801105U (en) | Battery casing that shielding nature is good |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |