Wireless digital communication receiving antenna based on microwave optical wave coherent conversion and a method thereof

Abstract

The invention discloses a wireless digital communication receiving antenna based on microwave optical wave coherent conversion and a method thereof. wherein the communication receiving antenna comprises a laser,a digital signal modulator, a cesium bubble and beam combiner. a photoelectric detector and a digital signal demodulator, wherein the laser is used for generating local oscillation light required in optical heterodyne detection; wherein the digital signal demodulator modulates a digital signal to microwaves, the cesium bulb modulates and converts the microwaves into modulated light waves, the beam combiner superposes local oscillation light and the modulated light waves to generate an optical heterodyne signal, the photoelectric detector receives the optical heterodyne signal, and the digital signal demodulator is used for recovering the optical heterodyne signal to the digital signal. Coherent conversion of microwaves and light waves in the Rydberg atom six-wave mixing processis utilized, phase modulation of a digital signal on the microwaves is converted into phase modulation on the light waves, coherent demodulation is conducted on the modulated light waves through an optical heterodyne demodulation method to recover the digital signal, and therefore digital communication is achieved.

Description

Technical field [0001] The invention relates to an antenna and a communication method thereof, in particular to a wireless digital communication receiving antenna based on microwave-to-light wave coherent conversion and a wireless digital communication method based on microwave-to-light wave coherent conversion. Background technique [0002] In 2012, the Shaffer research group of Oklahoma University in the United States and the Pfau research group of the University of Stuttgart in Germany cooperated for the first time by using the thermal Rydberg atom EIT and AT splitting to convert the measurement of microwave electric field intensity into optical frequency measurement, and experimentally realized microwave electric field measurement , The minimum electric field intensity measured is 8μVcm -1 , The sensitivity is 30μVcm -1 Hz -12 . In 2018, the David H. research group of the University of Maryland in the United States used the hot atom EIT-AT splitting phenomenon for digital com...

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Problems solved by technology

[0003] At present, experimental measurements and theoretical analysis show that digital communication based on thermal atom EIT-AT splitting phenomenon can only be carried out through amplitude modulation, and cannot transmit information through phase modulation; at the same time, channel capacity is affected by laser linewidth, transition broadening, dispersion Particle noise and decoherence of Rydberg atoms are limited

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