Design method of ultra-low noise radio frequency receiver based on Rydberg atomic transition

Abstract

The invention discloses a design method of an ultra-low noise radio frequency receiver based on Rydberg atomic transition. A Rydberg steam pool is additionally arranged at the front end of a radio frequency antenna of a traditional receiver, particles in the Rydberg steam pool are excited by laser, particles at different energy levels are migrated, and therefore radio frequency signals are amplified and then received by the traditional radio frequency antenna to enter the receiver. Two Rydberg energy levels are included in the amplification process; high-energy-level Rydberg atoms are excitedby radio frequency signals to generate stimulated radiation, electrons are bound to transit from a high-energy-level Rydberg state to a low-energy-level Rydberg state, a microwave photon with the frequency, polarization and phase information the same as those of the input microwave photon is released, and therefore amplification of weak microwave signals can be achieved. The radio frequency receiver is not limited by resistance thermal noise, and the problem that a traditional radio frequency receiver cannot receive power which is low in specific heat noise is solved.

Description

technical field [0001] The invention belongs to the technical field of laser communication, in particular to a design method of an ultra-low noise radio frequency receiver based on Rydberg atomic transitions. Background technique [0002] Radio waves are widely used in fields such as health, entertainment, communication, radar and aerospace. In these application fields, especially communication radar and aerospace fields, people are particularly concerned about how to receive weak electromagnetic signals, and the signal-to-noise ratio at the output of the receiver determines the detection capability. Usually the noise performance of a receiver can be measured by the noise figure. A typical radar receiver uses a microwave antenna to receive radio waves in space. When n-level circuits are cascaded, the total noise figure of the receiver is: [0003] [0004] In the formula, F i , G i Represent the noise figure and rated power gain of the i-th stage circuit, respectively...

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Problems solved by technology

[0009] In order to solve the above problems, the present invention proposes a design method of an ultra-low noise radio frequency receiver based on Rydberg atomic transitions, the purpose is to overcome the problem that traditional radio frequency receivers cannot receive signals lower than thermal noise power, and realize a A novel non-resistance radio frequency receiving method, which can realize the amplification and reception of weak radio frequency signals

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