Receiver with automatic gain control by an alternating current closed loop

The disclosed receiver comprises an antenna 310 configured to receive a wideband signal in the terahertz frequency range and to couple this signal to a quadratic detector 320. The received signal is modulated with data that has been sampled at a sampling frequency. The quadratic detector may be a pl...

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Hauptverfasser: Walaa Sahyoun, Philippe Le Bars, Annick Plagellat-Penarier, Philippe Nouvel, Stéphane Blin
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creator Walaa Sahyoun
Philippe Le Bars
Annick Plagellat-Penarier
Philippe Nouvel
Stéphane Blin
description The disclosed receiver comprises an antenna 310 configured to receive a wideband signal in the terahertz frequency range and to couple this signal to a quadratic detector 320. The received signal is modulated with data that has been sampled at a sampling frequency. The quadratic detector may be a plasmonic FET (420, fig.4) or a mixer comprising Schottky barrier diodes (620, fig.6). The signal from the quadratic detector 320 passes to a low pass filter 340 for data recovery, and to a bandpass filter 330 centred on the symbol rate. The strength of the symbol rate signal is measured 370 and used to control 380 the power of a regenerated carrier signal from a carrier regeneration circuit 360. The level-controlled, regenerated carrier signal is supplied to the quadratic detector 320 together with the signal from the antenna 310.
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The received signal is modulated with data that has been sampled at a sampling frequency. The quadratic detector may be a plasmonic FET (420, fig.4) or a mixer comprising Schottky barrier diodes (620, fig.6). The signal from the quadratic detector 320 passes to a low pass filter 340 for data recovery, and to a bandpass filter 330 centred on the symbol rate. The strength of the symbol rate signal is measured 370 and used to control 380 the power of a regenerated carrier signal from a carrier regeneration circuit 360. 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subjects BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title Receiver with automatic gain control by an alternating current closed loop
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