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Active attenuator circuit

An attenuator and circuit technology, applied in frequency-independent attenuators, reducing energy consumption, advanced technology, etc., can solve the problems of unfavorable overall system performance, low gain, poor isolation of input and output ports, etc., and achieve high attenuation accuracy , low additive phase shift, positive gain effect

Pending Publication Date: 2022-07-08
SOUTHEAST UNIV +1
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AI Technical Summary

Problems solved by technology

However, its amplitude attenuation modulation module uses a passive transistor array, so the gain is extremely low, and the isolation of the input and output ports is poor, which is not conducive to the overall performance of the system

Method used

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  • Active attenuator circuit
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Embodiment 1

[0044] like figure 1 As shown, the circuit structure of the high-precision RF active attenuator provided by the present invention includes a first matching network 100 , a second active amplitude attenuation modulation module 200 , a third amplitude and phase compensation module 300 , and a fourth matching network 400 .

[0045] The input end of the first matching network 100 serves as the input end of the active attenuator circuit, and the output end of the fourth matching network 400 serves as the output end of the active attenuator circuit. The first matching network 100 is used to complete the broadband impedance matching between the second active amplitude attenuation modulation module 200 and the external circuit impedance; the second active amplitude attenuation modulation module 200 is used to adjust the attenuation range according to the first adjustment instruction, and according to the adjustment The latter attenuation range is used to attenuate double-ended differe...

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PUM

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Abstract

The invention discloses an active attenuator circuit which comprises a first matching network, a second active amplitude attenuation modulation module, a third amplitude and phase compensation module and a fourth matching network. Wherein the second active amplitude attenuation modulation module adopts a cascode structure, and is used for adjusting the attenuation range according to the first adjustment instruction, attenuating a double-end differential signal according to the adjusted attenuation range, and transmitting the attenuated double-end signal to the third amplitude and phase compensation module. And the third amplitude and phase compensation module is used for adjusting amplitude and phase compensation and realizing high-precision and low-additional phase shift attenuation of the signal. Compared with a traditional structure, the active attenuator circuit has the advantages of being wide in band, high in integration level, low in additional phase shift and good in-band flatness.

Description

technical field [0001] The present invention relates to the technical field of electronic circuit design, in particular to the technical field of circuit design of active attenuators suitable for phased array systems. Background technique [0002] In recent years, due to the significant advantages of abundant spectrum resources, the millimeter-wave frequency band will soon become the golden frequency band for the development of broadband satellite communication technology and 5G mobile communication technology. For the millimeter-wave frequency band, a phased array system needs to be used to compensate for the high propagation loss caused by atmospheric propagation, so as to solve the problem of long-distance coverage of millimeter-wave communication. [0003] Attenuator is one of the key modules of AM in phased array system. In the transceiver components of the phased array, the functions of the attenuator mainly have the following two aspects: the first is gain compensati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H11/24
CPCH03H11/245Y02D30/70
Inventor 张有明唐旭升黄风义丁楚茜魏震楠曹云琦姜楠
Owner SOUTHEAST UNIV
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