A low noise amplifier structure with high out-of-band rejection characteristics

Abstract

The utility model discloses a kind of low-noise amplifier structures with high out-of-band suppression characteristics, it is related to radio frequency device technical field, wherein, low-noise amplifier includes electrically conductive and magnetically conductive shell, the top of electrically conductive and magnetically conductive shell is shaped with emission space, bottom is shaped with filter space, left side or right side is shaped with power supply space, emission space is equipped with emission module, filter space is equipped with filter module, power supply space is equipped with power supply module, power supply module, filter module and emission module are sequentially electrically connected.The technical scheme provided by the utility model can provide a kind of small volume and can prevent frequency signal leakage, with high reliability low-noise amplifier.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency device technology, and in particular to a low-noise amplifier structure with high out-of-band rejection characteristics. Background Technology

[0002] As is well known, communication systems are divided into receiving and transmitting systems. In microwave receiving systems, low-noise amplifiers (LNAs) are an essential and crucial component. In practical applications of the entire communication system, there is a certain frequency gap between the receiving and transmitting frequencies, but this gap is limited. When the receiving and transmitting systems operate simultaneously, the transmitting system has a higher transmission power, resulting in a certain amount of frequency signal leakage to the receiving system. At this time, the LNA receives and amplifies the high-power transmitting system frequency signal, causing the LNA to operate at saturation power. This leads to a decrease in overall performance, reduced sensitivity of the entire receiving system, and in severe cases, failure of the receiving system.

[0003] Currently, the common method to suppress frequency signals leaked from the receiving and transmitting system of a low-noise amplifier is to use an external, independent filter. However, this not only increases the number and size of the equipment, but also results in unsatisfactory reliability of the entire receiving system due to the potentially low matching between the transmitting system and the external filter. Utility Model Content

[0004] The main objective of this invention is to propose a low-noise amplifier structure with high out-of-band rejection characteristics, aiming to solve at least one of the aforementioned problems.

[0005] To achieve the above objectives, the present invention proposes a low-noise amplifier structure with high out-of-band rejection characteristics, comprising:

[0006] A conductive and magnetically conductive housing has a transmitting space formed at the top, a filtering space formed at the bottom, and a power supply space formed on the left or right side. The transmitting space contains a transmitting module, the filtering space contains a filtering module, and the power supply space contains a power supply module. The power supply module, the filtering module, and the transmitting module are electrically connected in sequence.

[0007] In one embodiment, the conductive and magnetic housing is provided with a first through slot connecting the transmitting space and the filtering space, and a second through slot connecting the transmitting space and the power supply space.

[0008] In one embodiment, the conductive and magnetic housing includes a mounting housing, a top cover plate, a bottom cover plate, and a side cover plate. The top side of the mounting housing is provided with a transmitting groove, the bottom side is provided with a filtering groove, and the right or left side is provided with a power supply groove. The top cover plate covers the opening of the transmitting groove, the bottom cover plate covers the opening of the filtering groove, and the side cover plate covers the opening of the power supply groove, thereby enclosing the transmitting space, the filtering space, and the power supply space.

[0009] In one embodiment, a shielding sealing strip is sandwiched between the top cover plate and the transmitting groove, the shielding sealing strip is sandwiched between the bottom cover plate and the filtering groove, and the shielding sealing strip is sandwiched between the side cover plate and the power supply groove.

[0010] In one embodiment, the launching groove and the top cover plate are connected by screws, wherein multiple screws are provided and arranged at intervals along the circumference of the launching groove.

[0011] In one embodiment, the filter groove and the bottom cover plate are connected by the screws, and a plurality of the screws are arranged at circumferential intervals along the filter groove.

[0012] In one embodiment, the power supply groove and the side cover are connected by screws, with a plurality of screws arranged at circumferential intervals along the firing groove.

[0013] In one embodiment, the first through groove is disposed on the bottom side of the emission groove and extends along the height direction, penetrating to the bottom side of the filter groove.

[0014] In one embodiment, the second through groove is disposed on the bottom wall of the emitting groove and extends in the left-right direction in the bottom wall of the emitting groove. The end of the second through groove near the power supply groove is provided with a first through hole penetrating the bottom wall of the emitting groove, and the end of the second through groove away from the power supply groove is provided with a second through hole extending into the emitting groove.

[0015] In one embodiment, the second through groove extends toward the side near the filter groove to communicate with the filter groove.

[0016] In one embodiment, the launching groove includes a first receiving groove and a second receiving groove. The first receiving groove and the second receiving groove are respectively disposed on opposite sides of the first through groove in the front-back direction. Both the first receiving groove and the second receiving groove have insertion holes on the groove sidewalls near the first through groove. The insertion holes penetrate the groove sidewalls of the first receiving groove or the second receiving groove and communicate with the first through groove. The launching module is provided in both the first receiving groove and the second receiving groove.

[0017] In one embodiment, there are two second through slots, which are respectively disposed in the first receiving slot and the second receiving slot.

[0018] The technical solution of this utility model provides a transmission space, a filtering space, and a power supply space within a conductive and magnetically conductive housing to accommodate the transmission module, the filtering module, and the power supply module, respectively. By placing the filtering module within the conductive and magnetically conductive housing, the problem of increased overall size and reduced reliability of the low-noise amplifier structure with high out-of-band rejection characteristics, which is caused by connecting the filter separately, is solved. Furthermore, the conductive and magnetically conductive housing further avoids frequency signal leakage problems that exist in the low-noise amplifier structure with high out-of-band rejection characteristics during operation, effectively preventing mutual interference between signals of different frequencies and improving the reliability of the low-noise amplifier structure with high out-of-band rejection characteristics. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 An exploded view of an embodiment of a low-noise amplifier structure with high out-of-band rejection characteristics provided by this utility model;

[0021] Figure 2 for Figure 1 The diagram shows a schematic representation of the structure of the mounting housing in the embodiment shown.

[0022] Figure 3 for Figure 1 A schematic diagram of the mounting housing from another perspective in the illustrated embodiment;

[0023] Figure 4 for Figure 1 A cross-sectional view of the embodiment shown;

[0024] Figure 5 for Figure 1 Partial cross-sectional view of the mounting housing in the illustrated embodiment.

[0025] Explanation of icon numbers:

[0026] 100. Conductive and magnetic housing; 11. Emission space; 12. Filtering space; 13. Power supply space; 14. Mounting housing; 141. Emission groove; 142. First receiving groove; 143. Second receiving groove; 144. Filtering groove; 145. Power supply groove; 146. Top cover plate; 147. Bottom cover plate; 148. Side cover plate; 15. First through groove; 151. Insertion hole; 16. Second through groove; 161. First through hole; 162. Second through hole; 17. Third through hole; 18. Screw hole;

[0027] 200. Filtering module.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] This invention proposes a low-noise amplifier structure with high out-of-band rejection characteristics.

[0033] Please see Figures 1 to 5 In one embodiment of this utility model, the low-noise amplifier structure with high out-of-band rejection characteristics includes:

[0034] The conductive and magnetic housing 100 has a transmitting space 11 formed on the top, a filtering space 12 formed on the bottom, and a power supply space 13 formed on the left or right side. The transmitting space 11 contains a transmitting module, the filtering space 12 contains a filtering module 200, and the power supply space 13 contains a power supply module. The power supply module, the filtering module 200, and the transmitting module are electrically connected in sequence.

[0035] The technical solution of this utility model provides a transmission space 11, a filtering space 12, and a power supply space 13 within a conductive and magnetic housing 100 to respectively accommodate the transmission module, the filtering module 200, and the power supply module. By placing the filtering module 200 within the conductive and magnetic housing 100, the problem of increased overall size and reduced reliability of the low-noise amplifier structure with high out-of-band rejection characteristics, which is caused by connecting a separate filter, is solved. Furthermore, the conductive and magnetic housing 100 can further avoid frequency signal leakage problems during operation of the low-noise amplifier structure with high out-of-band rejection characteristics, effectively preventing mutual interference between signals of different frequencies and improving the reliability of the low-noise amplifier structure with high out-of-band rejection characteristics.

[0036] In one embodiment, the conductive and magnetic housing 100 is provided with a first through slot 15 connecting the transmission space 11 and the filtering space 12, and a second through slot 16 connecting the transmission space 11 and the power supply space 13. The first through slot 15 is used to allow wires (specifically, radio frequency coaxial cables) to pass through the transmission space 11 and the filtering space 12. The arrangement of the wires provides a direct path for the transmission signal from the transmission module to the filtering module 200, enabling the transmission signal to enter the filtering module 200 for filtering processing efficiently, reducing signal loss and interference during transmission, and improving signal integrity and quality. The arrangement of the first through slot 15 enables the transmission space 11 and the filtering space 12 to work together better, forming a tightly connected functional unit within the conductive and magnetic housing 100. This helps to reduce the overall size of the amplifier, improve its structural compactness, and facilitate installation and integration in a limited space. The second through slot 16 is used to allow wires to pass through the power supply space 13 and the transmission space 11, so that the power supply module can directly provide a stable power supply to the transmission module. This reduces the length and complexity of the power supply line, reduces voltage drop and electromagnetic interference that may occur during power supply, and ensures that the transmission module can obtain a sufficient and stable power supply, thereby ensuring its normal operation and performance. In other embodiments, the conductive and magnetic housing 100 may also have a wire-passing hole, with the wires surrounding and wrapping around the outside of the conductive and magnetic housing 100.

[0037] In one embodiment, the conductive and magnetic housing 100 includes a mounting housing 14, a top cover 146, a bottom cover 147, and a side cover 148. The top side of the mounting housing 14 has a transmitting groove 141, the bottom side has a filtering groove 144, and the right or left side has a power supply groove 145. The top cover 146 covers the opening of the transmitting groove 141, the bottom cover 147 covers the opening of the filtering groove 144, and the side cover 148 covers the opening of the power supply groove 145, thus enclosing the transmitting space 11, the filtering space 12, and the power supply space 13. This split structure allows each cover to be easily opened and closed. When it is necessary to repair, replace, or upgrade the RF module, filtering module 200, or power supply module inside the low-noise amplifier structure with high out-of-band rejection characteristics, only the corresponding top cover 146, bottom cover 147, or side cover 148 needs to be opened. For example, if the radio frequency module malfunctions, the module can be directly accessed simply by opening the top cover 146, without disassembling the entire housing, greatly improving the convenience and efficiency of maintenance. In other embodiments, the conductive and magnetic housing 100 may not have a top cover 146, a bottom cover 147, or a side cover 148.

[0038] In one embodiment, a shielding sealing strip is sandwiched between the top cover plate 146 and the transmitting groove 141, a shielding sealing strip is sandwiched between the bottom cover plate 147 and the filtering groove 144, and a shielding sealing strip is sandwiched between the side cover plate 148 and the power supply groove 145. The shielding sealing strips further fill the tiny gaps between the cover plates and the grooves, making the connection between the various parts of the conductive and magnetic housing 100 tighter. When the transmitted signal is transmitted within the transmitting space 11, or when frequency signals exist within the filtering space 12 and the power supply space 13, the shielding sealing strips can effectively prevent frequency signals from leaking out from these gaps, and also prevent external frequency signal interference from entering the interior, thereby greatly enhancing the frequency signal shielding performance of the entire low-noise amplifier structure with high out-of-band rejection characteristics, ensuring the normal operation of internal modules, and improving frequency signal quality. In other embodiments, the shielding sealing strips may not be provided.

[0039] In one embodiment, the transmitting groove 141 and the top cover plate 146, the filtering groove 144 and the bottom cover plate 147, and the power supply groove 145 and the side cover plate 148 are all connected by multiple screws. The top cover plate 146, the bottom cover plate 147, and the side cover plate 148 are all provided with multiple threaded holes 18 spaced apart circumferentially. Screws pass through the threaded holes 18 to connect the transmitting groove 141 and the top cover plate 146, the filtering groove 144 and the bottom cover plate 147, and the power supply groove 145 and the side cover plate 148. The more screws used to connect the transmitting groove 141 and the top cover plate 146, the filtering groove 144 and the bottom cover plate 147, and the power supply groove 145 and the side cover plate 148, the smaller the fitting gap between them, further enhancing the shielding capability for frequency signals. In other embodiments, a snap-fit ​​connection can also be used.

[0040] In one embodiment, a first through-slot 15 is disposed on the bottom side of the transmitting groove 141 and extends along the height direction, penetrating to the bottom side of the filtering groove 144. This provides a shorter path for the conductor transmitting the frequency signal from the transmitting module to the filtering module 200, reducing signal loss during transmission and ensuring that the filtering module 200 can receive high-quality frequency signals. Furthermore, the through-slot design extending along the height direction avoids occupying excessive horizontal space, allowing the transmitting groove 141 and the filtering groove 144 to be compactly arranged within a limited space, improving the structural compactness of the low-noise amplifier structure with high out-of-band rejection characteristics.

[0041] In one embodiment, a second through slot 16 is disposed on the bottom wall of the transmitting groove 141 and extends in the left-right direction within the bottom wall of the transmitting groove 141. The end of the second through slot 16 near the power supply groove 145 has a first through hole 161 penetrating the bottom wall of the transmitting groove 141, and the end of the second through slot 16 away from the power supply groove 145 has a second through hole 162 extending into the transmitting groove 141. This design provides a convenient path for the power supply wires between the power supply module and the transmitting module, reducing the complexity of the power supply lines. The first through hole 161 allows the power supply line to directly enter the second through slot 16 from the power supply groove 145, while the second through hole 162 allows the power supply line to further extend into the transmitting module within the transmitting groove 141. Within the transmitting groove 141, the circuit interfaces can be evenly distributed, achieving a stable connection between the power supply module and the transmitting module. The second through slot 16 extends in the left-right direction and has two through holes, making reasonable use of the space on the bottom wall of the transmitting groove 141. Without increasing additional space occupation, it achieves an effective layout of the power supply lines and improves the overall space utilization rate.

[0042] In one embodiment, the second through slot 16 extends towards the side near the filter recess 144 and communicates with it. The second through hole 162 penetrates the sidewall of the transmitting recess 141 to connect the transmitting recess 141 and the filter recess 144. A third through hole 17 is provided on the sidewall of the power supply recess 145 near the filter recess 144, and the third through hole 17 extends along the height direction to the filter recess 144. That is, the power supply module can allow power supply wires to pass through the second through slot 16 and the third through hole 17 to supply power to the filter module 200. This reduces the length and complexity of the power supply line and reduces interference with the frequency signal. The second through slot 16 extends towards and communicates with the filter recess 144, while the third through hole 17 extends along the height direction to the filter recess 144. This design makes full use of the space inside the amplifier. By rationally arranging the channels in the vertical and horizontal directions, additional space occupation is avoided, making the amplifier structure more compact. In other embodiments, the third through hole 17 may not be provided.

[0043] In one embodiment, the transmitting groove 141 includes a first receiving groove 142 and a second receiving groove 143. The first receiving groove 142 and the second receiving groove 143 are respectively disposed on opposite sides of the first through groove 15 in the front-back direction. Each of the first receiving groove 142 and the second receiving groove 143 has a plug-in hole 151 on its groove sidewall near the first through groove 15. The plug-in hole 151 penetrates the groove sidewall of the first receiving groove 142 or the second receiving groove 143 and communicates with the first through groove 15. Further, a plug connector is provided in the plug connector, and the transmitting modules in the first receiving groove 142 and the second receiving groove 143 are both connected to the filter module 200 via the plug connector. The arrangement of the first receiving groove 142 and the second receiving groove 143 allows for the partitioned placement of the transmitting modules. This modular design allows each part of the transmitting module to be installed, debugged, and maintained relatively independently. When one part malfunctions, it can be replaced or repaired individually without having to process the entire transmitting module, improving the flexibility and efficiency of maintenance. The design of the insertion hole 151 and the connector makes the connection between the transmitting module and the filtering module 200 more flexible and convenient. It allows for quick plugging and unplugging according to actual needs, facilitating module replacement, upgrades, or adjustments to different configurations during production, thus enhancing the overall amplifier's flexibility and scalability. Furthermore, the top cover plate 146 has screw holes 18 corresponding to the openings of the first receiving slot 142 and the second receiving slot 143. Screws pass through the screw holes 18 to press and fix the top cover plate 146 tightly at the openings of the first receiving slot 142 and the second receiving slot 143. In other embodiments, the connector may not be provided.

[0044] In one embodiment, two second through slots 16 and two clearance recesses are provided, respectively located in the first receiving slot 142 and the second receiving slot 143. This allows the power supply module to supply power to the transmitting module located in the first receiving recess and the second receiving recess. In other embodiments, only one second through slot 16 may be provided.

[0045] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A low-noise amplifier structure with high out-of-band rejection characteristics, characterized in that, include: A conductive and magnetically conductive housing has a transmitting space formed at the top, a filtering space formed at the bottom, and a power supply space formed on the left or right side. The transmitting space contains a transmitting module, the filtering space contains a filtering module, and the power supply space contains a power supply module. The power supply module, the filtering module, and the transmitting module are electrically connected in sequence.

2. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 1, characterized in that, The conductive and magnetic housing is provided with a first through slot connecting the transmitting space and the filtering space, and a second through slot connecting the transmitting space and the power supply space.

3. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 2, characterized in that, The conductive and magnetic housing includes a mounting housing, a top cover plate, a bottom cover plate, and a side cover plate. The top side of the mounting housing is provided with a transmitting groove, the bottom side is provided with a filtering groove, and the right or left side is provided with a power supply groove. The top cover plate covers the opening of the transmitting groove, the bottom cover plate covers the opening of the filtering groove, and the side cover plate covers the opening of the power supply groove, thereby enclosing the transmitting space, the filtering space, and the power supply space.

4. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 3, characterized in that, A shielding sealing strip is sandwiched between the top cover plate and the transmitting groove, the shielding sealing strip is sandwiched between the bottom cover plate and the filtering groove, and the shielding sealing strip is sandwiched between the side cover plate and the power supply groove.

5. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 4, characterized in that, The launching groove and the top cover plate are connected by screws, and multiple screws are provided and arranged at intervals along the circumference of the launching groove; And / or, the filter groove and the bottom cover plate are connected by the screws, and the plurality of screws are arranged at circumferential intervals along the filter groove; And / or, the power supply groove and the side cover are connected by screws, with a plurality of screws arranged at circumferential intervals along the firing groove.

6. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 3, characterized in that, The first through groove is provided on the bottom side of the emission groove and extends along the height direction, penetrating to the bottom side of the filter groove.

7. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 6, characterized in that, The second through groove is provided on the bottom wall of the launching groove and extends in the left and right direction in the bottom wall of the launching groove. The end of the second through groove near the power supply groove is provided with a first through hole that penetrates the bottom wall of the launching groove, and the end of the second through groove away from the power supply groove is provided with a second through hole that extends into the launching groove.

8. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 7, characterized in that, The second through groove extends toward the side near the filter groove to connect with the filter groove.

9. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 7, characterized in that, The launching groove includes a first receiving groove and a second receiving groove. The first receiving groove and the second receiving groove are respectively disposed on opposite sides of the first through groove in the front-back direction. Both the first receiving groove and the second receiving groove have insertion holes on the groove sidewalls near the first through groove. The insertion holes penetrate the groove sidewalls of the first receiving groove or the second receiving groove and communicate with the first through groove. The launching module is provided in both the first receiving groove and the second receiving groove.

10. The low-noise amplifier structure with high out-of-band rejection characteristics as described in claim 9, characterized in that, The second channel is provided in two parts, which are respectively located in the first receiving channel and the second receiving channel.

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