Rotary step attenuator
By designing a rotary step attenuator, the attenuator is selected using a rotating shaft and turntable structure, solving the problems of large length, large size and signal leakage in existing technologies. This results in a smaller size and lower signal leakage, thus improving performance.
Patent Information
- Application Number
- CN202423008653.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing step attenuators are long and bulky when there are many series attenuators, and they also suffer from signal leakage and increased maximum attenuation.
It adopts a rotary structure, with an input turntable, an output turntable and an attenuation turntable set on the rotating shaft. The transmission of radio frequency signals is realized by the intermediate attenuator on the attenuation turntable, and different attenuation levels can be selected.
The length and volume of the step attenuator were reduced, signal leakage was decreased, performance was improved, and in particular, the maximum attenuation was reduced.
Smart Images
Figure CN223693343U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to attenuator technical field, concretely relates to a rotary step attenuator. BACKGROUND
[0002] In the application field of radio frequency signal, the step attenuator is a combination of fixed attenuators, the radio frequency path is selectively through or not through any one in a series of fixed attenuators, to switch the combination of step attenuators, reach various attenuation levels, its main function has the protection signal source and receiver, provides matching signal, realizes system calibration and controls signal power.
[0003] The existing step attenuator is mainly connected by a plurality of series attenuators, wherein the two ends of each attenuator are respectively parallel with selection switches, the corresponding attenuator is selected by controlling the on-off of the selection switch, so as to select the corresponding attenuation.
[0004] For the existing step attenuator, the following problems exist in actual use:
[0005] Firstly, if the attenuation quantity to be adjusted is more, that is, the number of attenuators is more, the length and volume of the whole step attenuator are large, which is not conducive to practical application.
[0006] Secondly, there is a straight-through attenuation between each attenuator of the step attenuator, and there is signal leakage between the straight-through attenuators, so that the maximum attenuation quantity is large, which affects the performance of the step attenuator. INVENTION CONTENTS
[0007] In view of the deficiencies in the background art, the utility model provides a rotary step attenuator, and the technical problems to be solved are that the number of series attenuators in the existing step attenuator is large, the length and volume are large, and the maximum attenuation quantity is large.
[0008] To solve the above technical problems, the utility model provides the following technical scheme: a rotary step attenuator, comprising a rotating shaft, an output disc, at least one attenuation disc and an input disc are sequentially arranged on the rotating shaft along the axial direction of the rotating shaft;
[0009] An input radio frequency connector is arranged on the input disc, and an output connector is arranged on the output disc; at least two intermediate attenuators are arranged on the attenuation disc along the circumferential direction of the attenuation disc.
[0010] After the input disc is rotated to the position, the input radio frequency connector is connected with one intermediate attenuator on the adjacent attenuation disc.
[0011] After the output turntable is rotated into position, the output connector is connected with an intermediate attenuator on the adjacent attenuating turntable.
[0012] In some embodiments, the intermediate attenuators on the attenuating turntable are evenly distributed along the circumferential direction of the attenuating turntable.
[0013] In some embodiments, the shaft comprises a first shaft body and a second shaft body from bottom to top, the diameter of the first shaft body is larger than that of the second shaft body; the input turntable is located on the first shaft body, and the attenuating turntable and the output turntable are located on the second shaft body.
[0014] In some embodiments, at least one mounting groove is formed on the second shaft body, and a rubber ring is mounted in the mounting groove.
[0015] A number of rollers equal to the number of intermediate attenuators are arranged on the side wall of the second shaft body along the length direction of the second shaft body; the rollers are located outside the rubber ring.
[0016] The inner side wall of the attenuating turntable and the output turntable is provided with a roller groove matched with the rollers, and each roller is located in a roller groove after the attenuating turntable and the output turntable are rotated into position.
[0017] In some embodiments, the top surface of the shaft is provided with an end cap, and the end cap covers all the rollers.
[0018] In some embodiments, the end cap is fixed on the top surface of the shaft by screws.
[0019] In some embodiments, the input turntable, the output turntable and the attenuating turntable are all annular, and the cross section of each turntable along the axial direction of the shaft is circular.
[0020] In some embodiments, a first scale line is arranged on the outer side wall of the input turntable at the corresponding position of the input radio frequency connector; a second scale line is arranged on the outer side wall of the attenuating turntable at the corresponding position of each intermediate attenuator; and a third scale line is arranged on the outer side wall of the output turntable at the corresponding position of the output connector.
[0021] After the input turntable is rotated into position, the first scale line, one second scale line on each attenuating turntable and the third scale line are arranged in a straight line.
[0022] In some embodiments, the number of attenuating turntables is two, and the number of intermediate attenuators on each attenuating turntable is the same or different.
[0023] In some embodiments, four intermediate attenuators are arranged on each attenuating turntable.
[0024] The utility model discloses a beneficial effect compared with prior art has: compared with the through type step attenuator of all attenuator series connection, the utility model discloses a rotary shaft is arranged, and the attenuating turntable is arranged on the rotary shaft, and a plurality of intermediate attenuators are arranged on each attenuating turntable, so that the radio frequency signal transmission can be carried out by rotating the attenuating turntable and selecting different intermediate attenuators, and different attenuation amount selection is realized, and finally the length and the volume of the whole step attenuator can be reduced, and the practical application is facilitated.
[0025] In addition, the length of the whole step attenuator is smaller, and there is no intermediate attenuator of the through type, and under the same conditions, the signal leakage of the whole step attenuator can be reduced, the maximum attenuation of the step attenuator can be reduced, and the performance of the step attenuator is improved. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is the structure schematic diagram of the utility model in the embodiment;
[0027] Figure 2 It is the internal section view of Figure 1
[0028] Figure 3 It is the structure schematic diagram of the rotary shaft in the embodiment;
[0029] Figure 4 It is the structure schematic diagram of the output turntable in the embodiment;
[0030] Figure 5 It is the structure schematic diagram of the attenuating turntable in the embodiment. DETAILED DESCRIPTION
[0031] The illustrative embodiments of the present application include but are not limited to a rotary step attenuator.
[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items. Words such as “comprising” or “including” mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. Words such as “connected” or “linked” are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect. It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0033] like Figures 1-2 As shown, a rotary step attenuator includes a rotating shaft 1, on which an output disk 2, two attenuation disks 3 and an input disk 4 are arranged sequentially along the axial direction of the rotating shaft 1.
[0034] The input turntable 4 is provided with an input RF connector 40, and the output turntable 2 is provided with an output connector 20; attenuation turntable 3 is provided with at least two intermediate attenuators 31 along the circumference of attenuation turntable 3.
[0035] 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.
[0036] 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.
[0037] In actual use, compared with the straight-through type step attenuator by connecting all attenuators in series, the utility model discloses a rotating shaft 1 is arranged, and a plurality of intermediate attenuators 31 are arranged on each attenuation turntable 3 by arranging the attenuation turntable 3 on the rotating shaft 1, so that different intermediate attenuators 31 can be selected by rotating the attenuation turntable 3 for radio frequency signal transmission, thereby realizing different attenuation amount selection, and finally the length and volume of the whole step attenuator can be reduced, which is beneficial to practical application.
[0038] In addition, due to the length of the whole step attenuator being smaller, and no intermediate attenuator of the straight-through type, under the same conditions, the signal leakage of the whole step attenuator can be reduced, and the maximum attenuation amount of the step attenuator can be reduced, thereby improving the performance of the step attenuator.
[0039] In some embodiments, the number of attenuation turntables 3 is not necessarily two, but can also be one, three, four, five or other numbers, which is set according to actual needs. For example, when the total attenuation amount needs to be increased, the number of attenuation turntables 3 can be increased.
[0040] Specifically, in the present embodiment, the intermediate attenuators 31 on the attenuation turntable 3 are uniformly distributed along the circumferential direction of the attenuation turntable.
[0041] For example, when two intermediate attenuators 31 are arranged on the attenuation turntable 3, the two intermediate attenuators 31 are arranged opposite to each other.
[0042] Alternatively, when three intermediate attenuators 31 are arranged on the attenuation turntable 3, the three intermediate attenuators 31 are arranged at intervals of 120°.
[0043] Alternatively, when four intermediate attenuators 31 are arranged on the attenuation turntable 3, the four intermediate attenuators 31 are arranged at intervals of 90°.
[0044] In actual use, by uniformly distributing the intermediate attenuators 31 on the attenuation turntable 3, the attenuation turntable 3 can switch one intermediate attenuator 31 every time it rotates a fixed angle, which is beneficial to the attenuation amount adjustment of the utility model.
[0045] Specifically, in the present embodiment, as shown in Figure 5 , four intermediate attenuators 31 are arranged on the attenuation turntable 3, and the four intermediate attenuators 31 are arranged at intervals of 90°. 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.
[0046] In addition, in this embodiment, the number of intermediate attenuators 31 on each attenuation turntable 3 can be the same, or 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 the actual needs.
[0047] 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. 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.
[0048] Additionally, refer to Figure 3 In this embodiment, the second shaft 14 has the same number of rollers 11 as the intermediate attenuators 31 along its own length direction on its side wall; when the number of intermediate attenuators 31 on the attenuation turntable 3 is different, the number of rollers 11 is the same as the number of the most intermediate attenuators 31 on the attenuation turntable 3.
[0049] from Figure 5 and Figure 3 As can be seen, since the attenuation turntable 3 is provided with four intermediate attenuators 31, the side wall of the second shaft 14 is provided with four needle rollers 11, and the four needle rollers 11 are set at 90° intervals.
[0050] Additionally, 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 that matches the needle roller 11, and the inner side wall of the attenuation turntable is provided with a second needle roller groove 33 that matches the needle roller 11. After the attenuation turntable 3 and the output turntable 2 are rotated into position, each needle roller 11 is located in a needle roller groove.
[0051] 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, it can be determined whether the attenuation turntable 3 and the output turntable 2 have been rotated into position by judging whether the needle roller 11 is in the needle roller groove.
[0052] In addition, in this embodiment, in order to limit the movement of the needle roller 11, such as Figure 2 As shown, the top surface of the rotating shaft 1 is provided with an end cap 5, which covers all the needle rollers 11. Specifically, the end cap 5 is fixed to the top surface of the rotating shaft 1 by screws 15.
[0053] exist Figure 3 In the middle, two mounting slots 12 are provided on the second shaft 14, as shown in the reference.Figure 2 In the embodiment, the rubber ring 10 is installed in each installation slot 12, and the needle roller 11 is outside the rubber ring 10.
[0054] In actual use, the rubber ring 10 is elastic and can make the needle roller 11 shrink. When the rotating disc rotates, the rubber ring 10 is extruded, the needle roller 11 shrinks, and the rotating disc is conveniently rotated. When the rotating disc is assembled in place, the rubber ring 10 pushes the needle roller 11 into the needle roller slot, and the positioning effect is achieved.
[0055] Specifically, in the embodiment, the input rotating disc 4, the output rotating disc 2 and the attenuation rotating disc 3 are annular, and the cross section of each rotating disc along the axial direction of the vertical rotating shaft is circular.
[0056] In some embodiments, the cross section of each rotating disc along the axial direction of the vertical rotating shaft can also be rectangular or other graphic shapes, as long as the intermediate attenuators 31 are uniformly distributed on the attenuation rotating disc 3.
[0057] Specifically, in the embodiment, in order to facilitate the observation and display of the operator, as shown in the figure, the outer side wall of the input rotating disc 4 is provided with a first scale line 41 at the corresponding position of the input radio frequency connector 40; the outer side wall of the attenuation rotating disc 3 is provided with a second scale line 30 at the corresponding position of each intermediate attenuator 31; and the outer side wall of the output rotating disc 2 is provided with a third scale line 21 at the corresponding position of the output connector 20. Figure 1
[0058] After the input rotating disc 4 is rotated in place, the first scale line 41, one second scale line 30 on each attenuation rotating disc 3 and the third scale line 21 are arranged in a straight line.
[0059] In actual use, whether the rotating disc is rotated in place can be known by observing the scale line.
[0060] The total attenuation of the two attenuation rotating discs 3 in the figure is described. It is assumed that the attenuation of the four intermediate attenuators 31 on the lower attenuation rotating disc 3 is 0 dB, x dB, 2x dB and 3x dB respectively, and the attenuation of the four intermediate attenuators 31 on the upper attenuation rotating disc 3 is 0 dB, 4x dB, 8x dB and 12x dB respectively. Then, for the two attenuation rotating discs 3, the total attenuation of 0 dB, x dB, 2x dB, 3x dB, 4x dB, 5x dB, 6x dB, 7x dB, 8x dB, 9x dB, 10x dB, 11x dB, 12x dB, 13x dB, 14x dB and 15x dB can be achieved by rotating. Figure 1 In some embodiments, the attenuation of the four intermediate attenuators 31 on the attenuation rotating disc 3 can be set according to actual needs, so as to achieve different total attenuation requirements.
[0061] In some embodiments, the attenuation of the four intermediate attenuators 31 on the attenuation rotating disc 3 can be set according to actual needs, so as to achieve different total attenuation requirements.
[0062] According to the above disclosure, relevant personnel can make various changes and modifications without deviating from the technical concept of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined by the scope of the claims.
Claims
1. A rotary step attenuator, characterized by, The shaft (1) is provided with an output rotating disc (2), at least one attenuation rotating disc (3) and an input rotating disc (4) in sequence along the axial direction of the shaft (1); The input rotating disc (4) is provided with an input radio frequency connector (40), and the output rotating disc (2) is provided with an output connector (20); the attenuation rotating disc (3) is provided with at least two intermediate attenuators (31) along the circumferential direction of the attenuation rotating disc (3); After the input rotating disc (4) is rotated to the position, the input radio frequency connector (40) is connected with one intermediate attenuator (31) on the adjacent attenuation rotating disc (3); After the output rotating disc (2) is rotated to the position, the output connector (20) is connected with one intermediate attenuator (31) on the adjacent attenuation rotating disc (3).
2. A rotary step attenuator according to claim 1, wherein The intermediate attenuators (31) on the attenuation rotating disc (3) are uniformly distributed along the circumferential direction of the attenuation rotating disc (3).
3. A rotary step attenuator according to claim 2, wherein The shaft (1) comprises a first shaft body (13) and a second shaft body (14) from bottom to top, the diameter of the first shaft body (13) is larger than that 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, wherein At least one mounting groove (12) is formed in the second shaft body (14), and a rubber ring (10) is mounted in the mounting groove (12); The side wall of the second shaft body (14) is provided with the same number of rolling pins (11) as the intermediate attenuators (31) along the length direction of the second shaft body (14); the rolling pins (11) are located outside the rubber ring (10); The inner side wall of the attenuation rotating disc (3) and the output rotating disc (2) is provided with a rolling pin groove matched with the rolling pin (11), and each rolling pin (11) is located in a rolling pin groove after the attenuation rotating disc (3) and the output rotating disc (2) are rotated to the position.
5. A rotary step attenuator according to claim 4, wherein The top surface of the shaft (1) is provided with an end cover (5), and the end cover (5) covers all the rolling pins (11).
6. A rotary step attenuator according to claim 5, wherein The end cover (5) is fixed on the top surface of the shaft (1) by screws (15).
7. A rotary step attenuator as claimed in claim 1, wherein, The input rotating disc (4), the output rotating disc (2) and the attenuation rotating disc (3) are annular, and the cross section of each rotating disc along the vertical shaft axial direction is circular.
8. A rotary step attenuator according to any one of claims 2 to 7, wherein The outer side wall of the input rotating disc (4) is provided with a first scale line (41) at the corresponding position of the input radio frequency connector (40); the outer side wall of the attenuation rotating disc (3) is provided with a second scale line (30) at the corresponding position of each intermediate attenuator (31); and the outer side wall of the output rotating disc (2) is provided with a third scale line (21) at the corresponding position of the output connector (20); After all the rotating discs (4) are rotated to the position, the first scale line (41), one second scale line (30) on each attenuation rotating disc (3) and the third scale line (21) are arranged in a straight line.
9. A rotary step attenuator according to claim 8, wherein, The number of the attenuation rotating discs (3) is two, and the number of the intermediate attenuators (31) on each attenuation rotating disc (3) is the same or different.
10. A rotary step attenuator according to claim 9, wherein, Each attenuation rotating disc (3) is provided with four intermediate attenuators (31).