Determining the angle-of-arrival of a radio-frequency source with a Rydberg atom-based sensor
By Amy K. Robinson, N. Prajapati, D. Senic, M. Simons, C. Holloway. 2021
164 citations recorded by the source corpus.
In this work, we demonstrate the use of a Rydberg atom-based sensor for determining the angle of arrival of an incident radio frequency (RF) wave or signal. The technique uses electromagnetically induced transparency in Rydberg atomic vapor in conjunction with a heterodyne Rydberg atom-based mixer. The Rydberg atom mixer measures the phase of the incident RF wave at two different locations inside an atomic vapor cell. The phase difference at these two locations is related to the direction of arrival of the incident RF wave. To demonstrate this approach, we measure phase differences of an incident 19.18 GHz wave at two locations inside a vapor cell filled with cesium atoms for various incident angles. Comparisons of these measurements with both the full-wave simulation and the plane wave theoretical model show that these atom-based sub-wavelength phase measurements can be used to determine the angle of arrival of an RF field.
Subfields: Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/5770f7e5b815ab149cf6e42d40a6ffeb78c30b8c
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In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Quantum technology for military applications (2021, background): “The combination of more antennas can detect the angle-of-arrival of the signal [125].”