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A circuit for active compensation of circulator isolation

A technology of circulator and isolation, which is applied in the field of RF front-end integrated circuit design, can solve problems such as isolation compression degradation, and achieve the effect of improving isolation

Active Publication Date: 2021-01-29
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Generally, due to the nonlinearity of the device and power compression, the isolation of the circulator will degrade as the power increases, and needs to be improved

Method used

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  • A circuit for active compensation of circulator isolation
  • A circuit for active compensation of circulator isolation
  • A circuit for active compensation of circulator isolation

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Embodiment Construction

[0027] The implementation of the present invention is described below through specific examples and in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] figure 2 It is a schematic structural diagram of a circuit for actively compensating the isolation of a circulator according to an embodiment of the present invention. Such as figure 2 As shown, an active compensation circuit for circulator isolation in the present invention includes: a low noise amplifier (LNA) module 10, a power amplifier (PA) module 20, a circulator (Circulator...

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Abstract

The invention discloses a circuit for actively compensating isolation of circulator. The circuit comprises a low noise amplifier module used for carrying out low noise amplification on a received signal; a power amplifier module which is used for carrying out power amplification on the modulation signal Tx; a circulator which is used for unidirectionally transmitting the modulation signal amplified by the power amplifier module to the common end of the circulator, radiating the modulation signal to the space through the antenna, unidirectionally transmitting a response signal received by the antenna to the output end of the circulator through the circulator, and transmitting the response signal to the input end of the low-noise amplifier module for low-noise amplification; an antenna whichis used for radiating the modulation signal outwards and receiving the modulation signal; a compensation circuit which is used for amplifying a modulation signal sampled from the power amplifier module and then synthesizing the modulation signal with a leakage signal leaked from the transmitting input end of the circulator to the receiving signal output end so as to reduce the signal amplitude leaked to the low-noise amplifier module. The low-noise amplifier module can effectively reduce the leakage power from PA to LNA so as to improve the isolation degree.

Description

technical field [0001] The invention relates to the technical field of radio frequency front-end integrated circuit design, in particular to a circuit for actively compensating the isolation of a circulator. Background technique [0002] The circulator is a non-reciprocal device with several terminals. It is a multi-port device that transmits the incident wave entering any one of its ports to the next port in a determined direction sequence. Its notable feature is that it can transmit high-frequency power in one direction. It is divided into Micro-optical fibers, electronic circulators, have good applications in isolators, duplexers, and reflection amplifiers. Circulators are used in RF front-ends as duplexers to route signals from the transmitter to the antenna and from the antenna to the receiver without allowing the signal to go directly from the transmitter to the receiver. [0003] Generally, due to the non-linearity of the device and power compression, the isolation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/40
Inventor 任江川戴若凡
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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