CN-224218375-U - Amplitude conditioning module

CN224218375UCN 224218375 UCN224218375 UCN 224218375UCN-224218375-U

Abstract

The utility model discloses an amplitude conditioning module, and relates to the technical field of communication. The amplitude conditioning module comprises a front-stage amplitude conditioning circuit and a rear-stage amplitude conditioning circuit, wherein the input end of the front-stage amplitude conditioning circuit inputs signals, the output end of the rear-stage amplitude conditioning circuit is connected with the input end of a switch, the front-stage amplitude conditioning circuit is a numerical control attenuator with low additional phase shift, the rear-stage amplitude conditioning circuit comprises a first switch, a second switch and a fixed attenuator, the output end of the front-stage amplitude conditioning circuit is connected with the first switch, two paths are arranged between the first switch and the second switch, N attenuators are arranged on one path, M attenuators are arranged on the other path, and N is more than or equal to 0, M is greater than or equal to N. By the structure, the large dynamic amplitude conditioning of the amplitude conditioning module is realized, and the low additional phase shift is realized.

Inventors

GE XIANSHENG
WU ZHEDONG
ZHAO LIANG
SUN JIAN
YUAN DEPIN

Assignees

中国电子科技集团公司第二十二研究所

Dates

Publication Date: 20260508
Application Date: 20250530

Claims (8)

1. An amplitude conditioning module comprises a front-stage amplitude conditioning circuit and a rear-stage amplitude conditioning circuit; the input end of the front-stage amplitude conditioning circuit inputs signals, and the output end of the rear-stage amplitude conditioning circuit is connected with the input end of the switch; the output end of the front-stage amplitude conditioning circuit is connected with a first switch, two paths are arranged between the first switch and a second switch, N attenuators are arranged on one path, M attenuators are arranged on the other path, N is more than or equal to 0, and M is more than or equal to N.
2. An amplitude conditioning module as claimed in claim 1, wherein an amplifier is provided between the pre-stage amplitude conditioning circuit and the post-stage amplitude conditioning circuit.
3. An amplitude conditioning module according to claim 1, wherein at least two subsequent amplitude conditioning circuits are provided, the previous amplitude conditioning circuit and the two subsequent amplitude conditioning circuits being cascaded in sequence, an amplifier being provided between the two subsequent amplitude conditioning circuits.
4. An amplitude conditioning module as claimed in claim 1, characterized in that an amplifier is arranged between the switch and the subsequent amplitude conditioning circuit.
5. The amplitude conditioning module according to claim 4, wherein the two post-stage amplitude conditioning circuits are sequentially connected with a fixed attenuator, an equalizer, and an amplifier.
6. The amplitude conditioning module according to claim 5, wherein the two post-stage amplitude conditioning circuits are sequentially connected with a filter, a fixed attenuator, an equalizer, and an amplifier.
7. The amplitude conditioning module according to claim 1, wherein an amplifier and a filter are sequentially connected between the latter amplitude conditioning circuit and the switch.
8. An amplitude conditioning module according to any of claims 1-7, characterized in that the digitally controlled attenuator with low additional phase shift is a parallel controlled digitally controlled attenuator.

Description

Amplitude conditioning module Technical Field The utility model relates to the technical field of communication, in particular to an amplitude conditioning module. Background With the progress of radar communication and radio communication technology, the complexity of the signal environment is exponentially increased, and meanwhile, the electronic countermeasure is promoted. In order to maintain effective communication/detection capability in a complex electromagnetic environment, the whole system needs to meet contradictory indexes such as high sensitivity (weak signal acquisition), high dynamic range (no distortion under strong interference), high linearity (multi-frequency band coexistence) and the like. As a signal chain end execution unit, the amplitude conditioning module directly determines the quality of an output signal, and the nonlinear distortion and temperature drift characteristics of the signal are amplified through a cascading effect to become the shortest plate of the overall performance barrel effect. The existing amplitude conditioning technology is shown in fig. 1, the amplitude conditioning is realized by adopting a mode of cascading multistage numerical control attenuators and controlling the numerical control attenuators by serial ports, and the product designed by the scheme has large additional phase shift and low response speed (mu s level) when the amplitude conditioning exists and can only be applied to a platform with low phase requirement and low response speed. Disclosure of utility model The utility model aims to provide an amplitude conditioning module which can realize large dynamic amplitude conditioning and low additional phase shift. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The amplitude conditioning module comprises a front-stage amplitude conditioning circuit and a rear-stage amplitude conditioning circuit, wherein the input end of the front-stage amplitude conditioning circuit inputs signals, the output end of the rear-stage amplitude conditioning circuit is connected with the input end of a switch, the front-stage amplitude conditioning circuit is a numerical control attenuator with low additional phase shift, the rear-stage amplitude conditioning circuit comprises a first switch, a second switch and a fixed attenuator, the output end of the front-stage amplitude conditioning circuit is connected with the first switch, two paths are arranged between the first switch and the second switch, N attenuators are arranged on one path, M attenuators are arranged on the other path, and N is more than or equal to 0, M is greater than or equal to N. As one embodiment, an amplifier is provided between the front-stage amplitude conditioning circuit and the rear-stage amplitude conditioning circuit. As one implementation scheme, at least two post-stage amplitude conditioning circuits are provided, a pre-stage amplitude conditioning circuit and two post-stage amplitude conditioning circuits are sequentially cascaded, and an amplifier is arranged between the two post-stage amplitude conditioning circuits. As an embodiment, an amplifier is provided between the switch and the post-stage amplitude conditioning circuit. As one embodiment, two subsequent amplitude conditioning circuits are connected with a fixed attenuator, an equalizer and an amplifier in sequence. As one embodiment, a filter, a fixed attenuator, an equalizer, and an amplifier are sequentially connected to the two subsequent amplitude conditioning circuits. As an implementation scheme, an amplifier and a filter are sequentially connected between the latter-stage amplitude conditioning circuit and the switch. As one embodiment, the digitally controlled attenuator with low additional phase shift is a parallel port controlled digitally controlled attenuator. Compared with the prior art, the utility model has the following beneficial effects: In the utility model, the cascade connection of the numerical control attenuator with low additional phase shift and the fixed attenuator of the switch control switching channel realizes the large dynamic amplitude conditioning and the low additional phase shift. In the utility model, the parallel port controlled numerical control attenuator is adopted, so that high-speed response can be realized. In the utility model, the isolation degree is increased by using the amplifier between the numerical control attenuator and the switch, and between the switch and the switch, thereby improving the accuracy of amplitude conditioning. Drawings Fig. 1 is a schematic diagram of a prior art amplitude conditioning module. Fig. 2 is a schematic diagram of an amplitude conditioning module according to the present utility model. Fig. 3 is a schematic diagram of an amplitude conditioning module according to another embodiment of the present utility model. Fig. 4 is a process structure diagram of the present utility model. The reference num