Amplitude conditioning module
By cascading the pre-amplifier and post-amplifier amplitude conditioning circuits, and combining a digitally controlled attenuator with low additional phase shift and a fixed attenuator with switching, the problems of large phase shift and slow response speed during amplitude conditioning are solved, achieving large dynamic amplitude conditioning and high-speed response, and improving the communication performance of the whole system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
- Filing Date
- 2025-05-30
- Publication Date
- 2026-05-08
AI Technical Summary
Existing amplitude conditioning technologies suffer from large additional phase shifts and slow response speeds during amplitude conditioning, failing to meet the requirements for high sensitivity, dynamic range, and linearity. In particular, the overall system performance is limited in complex electromagnetic environments.
A large dynamic amplitude conditioning is achieved by using pre-stage and post-stage amplitude conditioning circuits, combined with digitally controlled attenuators with low additional phase shift and fixed attenuators with switching, and by using amplifiers to improve isolation and response speed.
It achieves low additional phase shift and high-speed response, improves the accuracy of amplitude conditioning and the performance of the whole system, and adapts to the communication needs of complex electromagnetic environments.
Smart Images
Figure CN224218375U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of communication technology, specifically to an amplitude conditioning module. Background Technology
[0002] Advances in radar and radio communication technologies have led to an exponential increase in the complexity of the signal environment, prompting upgrades in electronic countermeasures. To maintain effective communication / detection capabilities in complex electromagnetic environments, the entire system must simultaneously meet conflicting requirements such as high sensitivity (weak signal acquisition), high dynamic range (no distortion under strong interference), and high linearity (coexistence of multiple frequency bands).
[0003] As the end-of-signal execution unit of the signal chain, the amplitude conditioning module directly determines the quality of the output signal. Its nonlinear distortion and temperature drift characteristics are amplified through the cascading effect, becoming the weakest link in the overall performance.
[0004] Existing amplitude modulation technologies such as Figure 1 As shown, amplitude conditioning is achieved by cascading multi-stage digitally controlled attenuators and controlling the digitally controlled attenuators via serial port. Products designed with this scheme have large additional phase shift and slow response speed (μs level) during amplitude conditioning, and can only be applied to platforms with low phase requirements and slow response speed. Utility Model Content
[0005] The purpose of this invention is to provide an amplitude conditioning module that can achieve large dynamic amplitude conditioning with low additional phase shift.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0007] An amplitude conditioning module includes a pre-amplitude conditioning circuit and a post-amplitude conditioning circuit. The input terminal of the pre-amplitude conditioning circuit receives a signal, and the output terminal of the post-amplitude conditioning circuit is connected to the input terminal of a switch. The pre-amplitude conditioning circuit is a digitally controlled attenuator with low additional phase shift. The post-amplitude conditioning circuit includes a first switch, a second switch, and a fixed attenuator. The output terminal of the pre-amplitude conditioning circuit is connected to the first switch. There are two paths between the first switch and the second switch. One path has N attenuators, and the other path has M attenuators, where N≥0 and M>N.
[0008] As one implementation scheme, an amplifier is provided between the preamplifier amplitude conditioning circuit and the postamplifier amplitude conditioning circuit.
[0009] As one implementation scheme, there are at least two post-amplitude conditioning circuits, with the pre-amplitude conditioning circuit and the two post-amplitude conditioning circuits cascaded in sequence, and an amplifier is provided between the two post-amplitude conditioning circuits.
[0010] As one implementation, an amplifier is provided between the switch and the subsequent amplitude conditioning circuit.
[0011] As one implementation scheme, a fixed attenuator, an equalizer, and an amplifier are connected sequentially to the two subsequent amplitude conditioning circuits.
[0012] In one implementation scheme, filters, fixed attenuators, equalizers, and amplifiers are connected sequentially to the two subsequent amplitude conditioning circuits.
[0013] In one implementation scheme, an amplifier and a filter are connected sequentially between the subsequent amplitude conditioning circuit and the switch.
[0014] As one implementation, the low-addition-phase-shift digitally controlled attenuator is a parallel-port controlled digitally controlled attenuator.
[0015] Compared with the prior art, this utility model has the following advantages:
[0016] In this invention, large dynamic amplitude conditioning and low additional phase shift are achieved by cascading a digitally controlled attenuator with low additional phase shift and a fixed attenuator with switch-controlled switching channels.
[0017] In this invention, a parallel port-controlled numerically controlled attenuator is used to achieve high-speed response.
[0018] In this utility model, amplifiers are used to increase isolation between the digitally controlled attenuator and the switch, and between the switches, thereby improving the accuracy of amplitude conditioning. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the amplitude conditioning module in the prior art.
[0020] Figure 2 This is a schematic diagram of the structure of an amplitude conditioning module according to the present invention.
[0021] Figure 3 This is a schematic diagram of another amplitude conditioning module of this utility model.
[0022] Figure 4 This is a process structure diagram of the present utility model.
[0023] The reference numerals in the attached diagram are as follows: 1-Pre-amplifier amplitude conditioning circuit, 2-Post-amplifier amplitude conditioning circuit, 3-Filter, 4-Amplifier, 5-Fixed attenuator, 6-Equalizer, 7-Multi-channel switch. Detailed Implementation
[0024] 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 protection scope of the present utility model.
[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] 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 meaning of "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.
[0028] An amplitude conditioning module includes a pre-amplitude conditioning circuit and a post-amplitude conditioning circuit; the input terminal of the pre-amplitude conditioning circuit receives a signal, and the output terminal of the post-amplitude conditioning circuit is output through a multi-channel switch.
[0029] Specifically, the preamplifier amplitude conditioning circuit is a digitally controlled attenuator with low additional phase shift, which finely adjusts the amplitude of the signal and attenuates it in small steps.
[0030] The post-amplitude conditioning circuit is used to attenuate the signal in large steps. It includes a first switch, a second switch, and a fixed attenuator. The output of the pre-amplitude conditioning circuit is connected to the first switch. There are two paths between the first switch and the second switch. The two paths are set with different attenuation modes (attenuation amounts), so that either of the two paths can be controlled to conduct according to the required attenuation requirements.
[0031] Furthermore, an amplifier is placed between the preamplifier amplitude conditioning circuit and the postamplifier amplitude conditioning circuit. The amplifier can amplify and buffer the signal from the preamplifier circuit, so that the changes in the postamplifier circuit will not be directly reflected in the preamplifier circuit, thereby improving the isolation of the entire circuit.
[0032] Example 1
[0033] like Figure 2 As shown in this embodiment, there are two paths between the first switch and the second switch. One path does not have a fixed attenuator, while the other path has a fixed attenuator. This ensures that one path is in a normal insertion loss state, while the other path is in an attenuation state.
[0034] When a significant signal attenuation is required, the signal amplitude needs to be reduced rapidly and substantially to avoid power overload and damage to subsequent circuits. A fixed attenuator is used for large-step attenuation.
[0035] By setting up two sets of switches, one path has fixed attenuation and the other path does not, the signal path can be quickly selected according to actual needs. When large attenuation steps are required, switch to the path with fixed attenuation to achieve a larger attenuation using a fixed attenuator; when large attenuation is not required, switch to the path without fixed attenuation so that the signal can pass through with less attenuation or no attenuation. This allows for flexible handling of different signal amplitude requirements and enables rapid adjustment of attenuation.
[0036] Example 2
[0037] like Figure 2 As shown, an amplitude conditioning module has at least two subsequent amplitude conditioning circuits. The preceding amplitude conditioning circuit and the two subsequent amplitude conditioning circuits are cascaded in sequence, and an amplifier is provided between the two subsequent amplitude conditioning circuits. A filter and an amplifier are provided between the multi-channel switch and the subsequent amplitude conditioning circuits.
[0038] Example 3
[0039] A digitally controlled attenuator with low additional phase shift achieves small-step attenuation of 0.5dB to 30.5dB, with a fixed attenuator attenuation of 30dB. When this embodiment has two subsequent amplitude conditioning circuits, it can achieve 90dB of large dynamic amplitude conditioning and low additional phase shift.
[0040] Example 4
[0041] The low-addition-phase-shift digitally controlled attenuator is a digitally controlled attenuator controlled via a parallel port, capable of achieving high-speed response (ns level).
[0042] Example 5
[0043] In this embodiment, two paths are provided between the first switch and the second switch. One path has N fixed attenuators, and the other path has M fixed attenuators. M > N, so that the attenuation of the two paths is different, thus expanding the range.
[0044] Example 6
[0045] In this embodiment, a fixed attenuator is provided between the pre-amplitude conditioning circuit and the signal receiving end. The purpose of setting the fixed attenuator is to match the standing wave when the standing wave at the receiving end is poor.
[0046] Example 6
[0047] In this embodiment, a fixed attenuator, an equalizer, and an amplifier are sequentially connected to the two subsequent amplitude conditioning circuits. An amplifier is located between the subsequent amplitude conditioning circuits and the multi-channel switch.
[0048] It is worth noting that a spare bit is also used between the subsequent amplitude conditioning circuit and the multi-channel switch to set the filter.
[0049] A spare bit is also provided between the two subsequent amplitude conditioning circuits for setting the filter ( Figure 3 and Figure 3 (As shown in the diagram), the spare is located between the fixed attenuator and the subsequent amplitude conditioning circuit.
[0050] Example 7
[0051] like Figure 3 As shown in this embodiment, there are two paths between the first switch and the second switch, one of which has a fixed attenuator and the other has two fixed attenuators.
[0052] A fixed attenuator is also provided between the preamplifier amplitude conditioning circuit and the signal receiver.
[0053] Two post-amplitude conditioning circuits are connected in sequence to a filter, a fixed attenuator, an equalizer, and an amplifier. An amplifier is located between the post-amplitude conditioning circuits and the multi-channel switch.
[0054] In the above embodiments, as a specific application, the numerically controlled attenuator is model WSD250500-06. The WSD250500-06 chip is a high-performance numerically controlled attenuator chip (MMIC) manufactured using a gallium arsenide pseudomorphic high electron mobility transistor (PHEMT) process with a gate length of 0.25μm. The chip is grounded via a through-hole on the back metal. The WSD250500-06 chip operates on a 0 / -5V power supply, with an insertion loss of 3.5dB, attenuation accuracy of ±(0.3+6%Ai)dB, input VSWR of 1.5:1, output VSWR of 1.5:1, and switching time of 20ns within the 25-50GHz range.
[0055] As a specific implementation application, the model of the first switch and the second switch is GS4829.
[0056] As a specific implementation application, the amplifier model is ILA-1840JDIY.
[0057] As a specific implementation application, the filter model is IB35R5-11R0N10A.
[0058] As a specific application, the fixed attenuator is the GaAs fixed attenuator-IFA series.
[0059] As a specific application, the equalizer model is SW0324406.
[0060] In the above embodiments, the amplitude conditioning module of this utility model is manufactured using a bare die process, such as... Figure 4 The diagram shown is a process structure diagram of Example 7.
[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An amplitude conditioning module, comprising a pre-stage amplitude conditioning circuit and a post-stage amplitude conditioning circuit; the input terminal of the pre-stage amplitude conditioning circuit receives a signal, and the output terminal of the post-stage amplitude conditioning circuit is connected to the input terminal of a switch, characterized in that, The preamplifier amplitude conditioning circuit is a digitally controlled attenuator with low additional phase shift. The postamplifier amplitude conditioning circuit includes a first switch, a second switch, and a fixed attenuator. The output of the preamplifier amplitude conditioning circuit is connected to the first switch. There are two paths between the first switch and the second switch. One path has N attenuators, and the other path has M attenuators, where N≥0 and M>N.
2. The amplitude conditioning module according to claim 1, characterized in that, An amplifier is provided between the preamplifier amplitude conditioning circuit and the postamplifier amplitude conditioning circuit.
3. The amplitude conditioning module according to claim 1, characterized in that, There are at least two post-amplitude conditioning circuits. The pre-amplitude conditioning circuit and the two post-amplitude conditioning circuits are cascaded in sequence, and an amplifier is provided between the two post-amplitude conditioning circuits.
4. The amplitude conditioning module according to claim 1, characterized in that, An amplifier is located between the switch and the subsequent amplitude conditioning circuit.
5. The amplitude conditioning module according to claim 4, characterized in that, A fixed attenuator, an equalizer, and an amplifier are connected sequentially to the two subsequent amplitude conditioning circuits.
6. The amplitude conditioning module according to claim 5, characterized in that, The two subsequent amplitude conditioning circuits are connected in sequence to a filter, a fixed attenuator, an equalizer, and an amplifier.
7. The amplitude conditioning module according to claim 1, characterized in that, An amplifier and a filter are connected sequentially between the subsequent amplitude conditioning circuit and the switch.
8. An amplitude conditioning module according to any one of claims 1-7, characterized in that, The low-addition-phase-shift digitally controlled attenuator is a parallel-port controlled digitally controlled attenuator.