Rotary step attenuator
By setting an attenuation dial on the rotation axis of the step attenuator and evenly distributing the intermediate attenuator, the selection of different attenuators is achieved, solving the problems of equipment length, size and signal leakage, and improving performance.
Patent Information
- Application Number
- CN202411781689.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-03-11
AI Technical Summary
When existing step attenuators need to adjust the larger attenuation amount, the large number of attenuators leads to large equipment length and volume, and there are problems such as signal leakage and maximum attenuation amount increasing, which affects performance.
A rotary step attenuator is designed. By setting an attenuation dial on the shaft and evenly distributing multiple intermediate attenuators on each attenuation dial, selecting different intermediate attenuators by rotating the attenuation dial to achieve the selection of different attenuation dials.
Reduces the length and volume of the step attenuator, reduces signal leakage and maximum attenuation, and improves the performance and application convenience of the equipment.
Smart Images
Figure CN119601932A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of attenuators, and in particular to a rotary step attenuator. Background Art
[0002] In the application field of RF signals, a step attenuator is a combination of fixed attenuators, and its RF path selectively passes through or does not pass through any one of a series of fixed attenuators to switch the combination of step attenuators to achieve various attenuation levels; its main functions are to protect signal sources and receivers, provide matching signals, realize system calibration and control signal power.
[0003] The existing step attenuator is mainly composed of a plurality of attenuators connected in series, wherein a selection switch is connected in parallel at both ends of each attenuator, and the corresponding attenuator is selected by controlling the on-off of the selection switch, thereby selecting the corresponding attenuation amount.
[0004] The existing step attenuator has the following problems in actual use:
[0005] First, since all the attenuators are connected in series in sequence, if the attenuation to be adjusted is large, that is, the number of attenuators is large, the entire step attenuator will be long and large in size, which is not conducive to practical application;
[0006] Secondly, there is direct attenuation between each attenuator of the step attenuator, and there is signal leakage between each level of direct attenuators, which will increase the maximum attenuation and affect the performance of the step attenuator. Summary of the invention
[0007] In view of the shortcomings of the background technology, the present invention provides a rotary step attenuator, and the technical problem to be solved is that when there are a large number of attenuators connected in series in the existing step attenuator, there are problems of long length and large volume, and the maximum attenuation will increase.
[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a rotary step attenuator, comprising a rotating shaft, on which an output rotating disk, at least one attenuation rotating disk and an input rotating disk are sequentially arranged along the axial direction of the rotating shaft;
[0009] The input turntable is provided with an input RF connector, and the output turntable is provided with an output connector; the attenuation turntable is provided with at least two intermediate attenuators along the circumferential direction of the attenuation turntable;
[0010] After the input turntable is rotated into position, the input RF connector is connected to an intermediate attenuator on an adjacent attenuation turntable;
[0011] After the output turntable is rotated into position, the output connector is connected to an intermediate attenuator on the adjacent attenuation turntable.
[0012] In a certain embodiment, the intermediate attenuators on the attenuation turntable are evenly distributed along the circumference of the attenuation turntable.
[0013] In a certain embodiment, the rotating shaft includes a first shaft body and a second shaft body from bottom to top, and the diameter of the first shaft body is larger than the diameter of the second shaft body; the input turntable is located on the first shaft body, and the attenuation turntable and the output turntable are located on the second shaft body.
[0014] In a certain embodiment, at least one mounting groove is formed on the second shaft, and a rubber ring is installed in the mounting groove;
[0015] The side wall of the second shaft body is provided with the same number of rollers as the intermediate attenuator along its length direction; the rollers are arranged on the outer periphery of the rubber ring;
[0016] The inner side walls of the attenuation rotary disc and the output rotary disc are provided with needle roller grooves matching the needle rollers. After the attenuation rotary disc and the output rotary disc are rotated into place, each needle roller is located in a needle roller groove.
[0017] In a certain embodiment, an end cover is provided on the top surface of the rotating shaft, and the end cover covers all the roller needles.
[0018] In a certain embodiment, the end cover is fixed to the top surface of the rotating shaft by screws.
[0019] In a certain embodiment, the input turntable, the output turntable and the attenuation turntable are all annular, and the cross-section of each turntable along the axial direction perpendicular to the rotation axis is circular.
[0020] In a certain embodiment, a first scale line is provided on the outer wall of the input turntable at a position corresponding to the input RF connector; a second scale line is provided on the outer wall of the attenuation turntable at a position corresponding to each intermediate attenuator; and a third scale line is provided on the outer wall of the output turntable at a position corresponding to the output connector.
[0021] After the input dial is rotated into position, the first scale line, a second scale line on each attenuation dial, and the third scale line are arranged in a straight line up and down.
[0022] In a certain embodiment, the number of the attenuation turntables is two, and the number of intermediate attenuators on each attenuation turntable is the same or different.
[0023] In a certain embodiment, four intermediate attenuators are provided on each attenuation turntable.
[0024] Compared with the prior art, the present invention has the following beneficial effects: compared with a straight-through step attenuator in which all attenuators are connected in series, the present invention provides a rotating shaft, an attenuation rotary disk on the rotating shaft, and multiple intermediate attenuators on each attenuation rotary disk, so that different intermediate attenuators can be selected to transmit radio frequency signals by rotating the attenuation rotary disk, thereby realizing different attenuation selections, and ultimately reducing the length and volume of the entire step attenuator, which is beneficial to practical applications;
[0025] In addition, since the length of the entire step attenuator is shortened and there is no straight-through intermediate attenuator, under the same conditions, the signal leakage of the entire step attenuator and the maximum attenuation of the step attenuator can be reduced, thereby improving the performance of the step attenuator. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 It is a schematic diagram of the structure of the present invention in an embodiment;
[0027] Figure 2 for Figure 1 Internal cross-section of
[0028] Figure 3 is a schematic structural diagram of a rotating shaft in an embodiment;
[0029] Figure 4 is a schematic structural diagram of an output turntable in an embodiment;
[0030] Figure 5 Schematic diagram of the structure of the attenuation turntable in the embodiment. DETAILED DESCRIPTION
[0031] Illustrative embodiments of the present application include, but are not limited to, a rotary step attenuator.
[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.
[0033] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items. "Include" or "include" and similar words mean that the elements or objects appearing in front of "include" or "include" cover the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.
[0034] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".
[0035] like Figure 1-2 As shown, a rotary step attenuator comprises a rotating shaft 1, on which an output rotating disc 2, two attenuation rotating discs 3 and an input rotating disc 4 are arranged in sequence along the axial direction of the rotating shaft 1;
[0036] An input RF connector 40 is provided on the input turntable 4, and an output connector 20 is provided on the output turntable 2; at least two intermediate attenuators 31 are provided on the attenuation turntable 3 along the circumferential direction of the attenuation turntable 3;
[0037] After the input turntable 4 is rotated into position, the input RF connector 40 is connected to an intermediate attenuator 31 on the adjacent attenuation turntable 3;
[0038] After the output turntable 2 is rotated to a position, the output connector 20 is connected to an intermediate attenuator 31 on the adjacent attenuation turntable 3 .
[0039] In actual use, compared with a straight-through step attenuator in which all attenuators are connected in series, the present invention provides a rotating shaft 1, and an attenuation dial 3 is provided on the rotating shaft 1, and multiple intermediate attenuators 31 are provided on each attenuation dial 3, so that different intermediate attenuators 31 can be selected to transmit radio frequency signals by rotating the attenuation dial 3, thereby realizing different attenuation selections, and ultimately reducing the length and volume of the entire step attenuator, which is beneficial to practical applications;
[0040] In addition, since the length of the entire step attenuator is shortened and there is no straight-through intermediate attenuator, under the same conditions, the signal leakage of the entire step attenuator and the maximum attenuation of the step attenuator can be reduced, thereby improving the performance of the step attenuator.
[0041] In some implementations, the number of the attenuation dials 3 is not necessarily two, but may be one, three, four, five or other numbers, depending on actual needs. For example, when the total attenuation amount needs to be increased, the number of the attenuation dials 3 may be increased.
[0042] Specifically, in this embodiment, the intermediate attenuators 31 on the attenuation turntable 3 are evenly distributed along the circumferential direction of the attenuation turntable.
[0043] For example, when two intermediate attenuators 31 are provided on the attenuation turntable 3, the two intermediate attenuators 31 are arranged opposite to each other;
[0044] Alternatively, when three intermediate attenuators 31 are provided on the attenuation turntable 3, the three intermediate attenuators 31 are arranged at intervals of 120°;
[0045] Alternatively, when four intermediate attenuators 31 are disposed on the attenuation turntable 3 , the four intermediate attenuators 31 are disposed at intervals of 90°.
[0046] In actual use, by evenly distributing the intermediate attenuators 31 on the attenuation dial 3, one intermediate attenuator 31 can be switched every time the attenuation dial 3 rotates a fixed angle, which is beneficial to the attenuation adjustment of the present invention.
[0047] Specifically, in this embodiment, Figure 5 As shown, four intermediate attenuators 31 are provided on the attenuation turntable 3, and the four intermediate attenuators 31 are arranged at intervals of 90 degrees. In actual use, the number of intermediate attenuators 31 on the attenuation turntable 3 can be adjusted according to actual needs. For example, when the total attenuation amount needs to be increased, the number of intermediate attenuators 31 can be increased.
[0048] In addition, in this embodiment, the number of intermediate attenuators 31 on each attenuation turntable 3 can be the same, the number of intermediate attenuators 31 on some attenuation turntables 3 can be the same, or the number of intermediate attenuators 31 on each attenuation turntable 3 can be different, depending on actual needs.
[0049] Reference Figure 2 and Figure 3 In this embodiment, the rotating shaft 1 includes a first shaft body 13 and a second shaft body 14 from bottom to top, and the diameter of the first shaft body 13 is larger than the diameter of the second shaft body 14; the input turntable 4 is located on the first shaft body 13, and the attenuation turntable 3 and the output turntable 2 are located on the second shaft body 14.
[0050] In addition, refer to Figure 3 In this embodiment, the side wall of the second shaft body 14 is provided with the same number of roller needles 11 as the intermediate attenuators 31 along its length direction; when the number of the intermediate attenuators 31 on the attenuation turntable 3 is different, the number of the roller needles 11 is the same as the number of the largest intermediate attenuators 31 on the attenuation turntable 3. Figure 5 and Figure 3 It can be seen that, since the attenuation turntable 3 is provided with four intermediate attenuators 31, the side wall of the second shaft body 14 is provided with four needle rollers 11, and the four needle rollers 11 are arranged at intervals of 90 degrees.
[0051] In addition, refer to Figure 4 and Figure 5 The second shaft 14 passes through the center hole 23 of the output turntable 2 and the center hole 32 of the attenuation turntable 3. The inner side wall of the output turntable 2 is provided with a first needle roller groove 24 matching the needle roller 11, and the inner side wall of the attenuation turntable is provided with a second needle roller groove 33 matching the needle roller 11. After the attenuation turntable 3 and the output turntable 2 are rotated into place, each needle roller 11 is located in a needle roller groove.
[0052] In actual use, by setting a needle roller 11 corresponding to the intermediate attenuator 31, and setting a needle roller groove matching the needle roller 11 on the attenuation turntable 3 and the output turntable 2, when the attenuation turntable 3 and the output turntable 2 are rotated, it can be determined whether the attenuation turntable 3 and the output turntable 2 are rotated into place by judging whether the needle roller 11 is in the needle roller groove.
[0053] In addition, in this embodiment, in order to limit the position of the needle roller 11, as shown in FIG. Figure 2 As shown, the top surface of the rotating shaft 1 is provided with an end cover 5, and the end cover 5 covers all the needle rollers 11. Specifically, the end cover 5 is fixed on the top surface of the rotating shaft 1 by screws 13.
[0054] exist Figure 3 In the embodiment, the second shaft body 14 is provided with two mounting grooves 12, referring to Figure 2 In this embodiment, a rubber ring 10 is installed in each installation groove 12 , and the needle roller 11 is outside the rubber ring 10 .
[0055] In actual use, the rubber ring 10 is elastic and can shrink the needle roller 11. When the turntable rotates, the rubber ring 10 is squeezed to shrink the needle roller 11, which facilitates the rotation of the turntable. When the assembly is rotated in place, the rubber ring 10 pushes the needle roller 11 into the needle roller groove to play a positioning role.
[0056] Specifically, in this embodiment, the input turntable 4, the output turntable 2 and the attenuation turntable 3 are all annular, and the cross section of each turntable along the axial direction perpendicular to the rotation axis is circular.
[0057] In a certain implementation, the cross section of each turntable along the axial direction perpendicular to the rotation axis may also be a rectangle or other graphic shapes, as long as the intermediate attenuators 31 are evenly distributed on the attenuation turntable 3 .
[0058] Specifically, in this embodiment, in order to facilitate the operator's observation display, as shown in FIG. Figure 1 As shown, a first scale line 41 is provided on the outer wall of the input turntable 4 at a position corresponding to the input RF connector 40; a second scale line 30 is provided on the outer wall of the attenuation turntable 3 at a position corresponding to each intermediate attenuator 31; and a third scale line 21 is provided on the outer wall of the output turntable 2 at a position corresponding to the output connector 20;
[0059] After the input turntable 4 is rotated to the right position, the first scale line 41, one second scale line 30 on each attenuation turntable 3, and the third scale line 21 are arranged in a straight line.
[0060] In actual use, you can know whether the turntable is rotated to the right position by observing the scale line.
[0061] right Figure 1 Take the total attenuation of the two attenuation dials 3 as an example, assuming that the attenuation of the four intermediate attenuators 31 on the lower attenuation dial 3 is 0dB, xdB, 2xdB and 3xdB respectively, and assuming that the attenuation of the four intermediate attenuators 31 on the upper attenuation dial 3 is 0dB, 4xdB, 8xdB and 12xdB respectively, then for these two attenuation dials 3, they can achieve a total attenuation of 0dB, xdB, 2xdB, 3xdB, 4xdB, 5xdB, 6xdB, 7xdB, 8xdB, 9xdB, 10xdB, 11xdB, 12xdB, 13xdB, 14xdB and 15xdB by rotation.
[0062] In a certain implementation manner, the attenuation of the four intermediate attenuators 31 on the attenuation turntable 3 can be set according to actual needs, so as to achieve different total attenuation requirements.
[0063] The above is based on the present invention as an inspiration. Through the above description, relevant staff can make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A rotary step attenuator, characterized in that: The invention comprises a rotating shaft (1), wherein an output rotating disc (2), at least one attenuation rotating disc (3) and an input rotating disc (4) are arranged in sequence on the rotating shaft (1) along the axial direction of the rotating shaft (1); The input turntable (4) is provided with an input radio frequency connector (40), and the output turntable (2) is provided with an output connector (20); the attenuation turntable (3) is provided with at least two intermediate attenuators (31) along the circumferential direction of the attenuation turntable (3); After the input turntable (4) is rotated into position, the input radio frequency connector (40) is connected to an intermediate attenuator (31) on the adjacent attenuation turntable (3); After the output turntable (2) is rotated into position, the output connector (20) is connected to an intermediate attenuator (31) on the adjacent attenuation turntable (3).
2. A rotary step attenuator according to claim 1, characterized in that: The intermediate attenuators (31) on the attenuation turntable (3) are evenly distributed along the circumferential direction of the attenuation turntable (3).
3. A rotary step attenuator according to claim 2, characterized in that: The rotating shaft (1) comprises, from bottom to top, a first shaft body (13) and a second shaft body (14); the diameter of the first shaft body (13) is greater than the diameter of the second shaft body (14); the input rotating disc (4) is located on the first shaft body, and the attenuation rotating disc (3) and the output rotating disc (2) are located on the second shaft body (14).
4. A rotary step attenuator according to claim 3, characterized in that: At least one mounting groove (12) is formed on the second shaft (14), and a rubber ring (10) is installed in the mounting groove (12); The side wall of the second shaft (14) is provided with the same number of roller needles (11) as the intermediate attenuator (31) along its length direction; the roller needles (11) are arranged on the periphery of the rubber ring (10); The inner side walls of the attenuation rotary disc (3) and the output rotary disc (2) are provided with needle roller grooves matching the needle rollers (11); after the attenuation rotary disc (3) and the output rotary disc (2) are rotated into place, each needle roller (11) is located in a needle roller groove.
5. The rotary step attenuator according to claim 4, characterized in that: The top surface of the rotating shaft (1) is provided with an end cover (5), and the end cover (5) covers all the roller needles (11).
6. The rotary step attenuator according to claim 5, characterized in that: The end cover (5) is fixed on the top surface of the rotating shaft (1) by means of screws (13).
7. The rotary step attenuator according to claim 1, characterized in that: The input turntable (4), the output turntable (2) and the attenuation turntable (3) are all annular, and the cross section of each turntable along the axial direction perpendicular to the rotation axis is circular.
8. A rotary step attenuator according to any one of claims 2 to 7, characterized in that: A first scale line (41) is provided on the outer wall of the input turntable (4) at a position corresponding to the input radio frequency connector (40); a second scale line (30) is provided on the outer wall of the attenuation turntable (3) at a position corresponding to each intermediate attenuator (31); and a third scale line (21) is provided on the outer wall of the output turntable (2) at a position corresponding to the output connector (20); After all the rotating disks (4) are rotated into position, the first scale line (41), a second scale line (30) on each attenuation rotating disk (3), and the third scale line (21) are arranged in a straight line.
9. The rotary step attenuator according to claim 8, characterized in that: The number of the attenuation turntables (3) is two, and the number of intermediate attenuators (31) on each attenuation turntable (3) is the same or different.
10. The rotary step attenuator according to claim 9, characterized in that: Each attenuation turntable (3) is provided with four intermediate attenuators (31).