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Quantum Receiver the First to Detect Entire Radio Frequency Spectrum

FEBRUARY 10, 2021 – A new quantum sensor can analyze the full spectrum of radio frequency and real-world signals, unleashing new potentials for soldier communications, spectrum awareness and electronic warfare.

Army researchers built the quantum sensor, which can sample the radio-frequency spectrum—from zero frequency up to 20 GHz—and detect AM and FM radio, Bluetooth, Wi-Fi and other communication signals.

The Rydberg sensor uses laser beams to create highly-excited Rydberg atoms directly above a microwave circuit, to boost and hone in on the portion of the spectrum being measured. The Rydberg atoms are sensitive to the circuit’s voltage, enabling the device to be used as a sensitive probe for the wide range of signals in the RF spectrum.

“All previous demonstrations of Rydberg atomic sensors have only been able to sense small and specific regions of the RF spectrum, but our sensor now operates continuously over a wide frequency range for the first time,” said Dr. Kevin Cox, a researcher at the U.S. Army Combat Capabilities Development Command, now known as DEVCOM, Army Research Laboratory. “This is a really important step toward proving that quantum sensors can provide a new, and dominant, set of capabilities for our Soldiers, who are operating in an increasingly complex electro-magnetic battlespace.”

The Rydberg spectrum analyzer has the potential to surpass fundamental limitations of traditional electronics in sensitivity, bandwidth and frequency range. Because of this, the lab’s Rydberg spectrum analyzer and other quantum sensors have the potential to unlock a new frontier of Army sensors for spectrum awareness, electronic warfare, sensing and communications—part of the Army’s modernization strategy.

“Devices that are based on quantum constituents are one of the Army’s top priorities to enable technical surprise in the competitive future battlespace,” said Army researcher Dr. David Meyer. “Quantum sensors in general, including the one demonstrated here, offer unparalleled sensitivity and accuracy to detect a wide range of mission-critical signals.”

The peer-reviewed journal Physical Review Applied published the researchers’ findings, Waveguide-coupled Rydberg spectrum analyzer from 0 to 20 GigaHerz, co-authored by Army researchers Drs. David Meyer, Paul Kunz, and Kevin Cox (https://journals.aps.org/prapplied/abstract/10.1103/PhysRevApplied.15.014053).

The researchers plan additional development to improve the signal sensitivity of the Rydberg spectrum analyzer, aiming to outperform existing state-of-the-art technology.

“Significant physics and engineering effort is still necessary before the Rydberg analyzer can integrate into a field-testable device,” Cox said. “One of the first steps will be understanding how to retain and improve the device’s performance as the sensor size is decreased. The Army has emerged as a leading developer of Rydberg sensors, and we expect more cutting-edge research to result as this futuristic technology concept quickly becomes a reality.”

DEVCOM Army Research Laboratory is an element of the U.S. Army Combat Capabilities Development Command. As the Army’s corporate research laboratory, ARL is operationalizing science to achieve transformational overmatch. Through collaboration across the command’s core technical competencies, DEVCOM leads in the discovery, development and delivery of the technology-based capabilities required to make Soldiers more successful at winning the nation’s wars and come home safely. DEVCOM is a major subordinate command of the Army Futures Command.

Story by Patricia Riippa
Army Research Laboratory

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Earth Day Underlines Importance of Energy Mitigation

APRIL 17, 2021 – For more than 50 years, the Army has celebrated Earth Day, reminding the force about the importance of being good stewards of both the environment and the Army’s resources. “Earth Day isn’t just what we do on April 22, it’s what the Army does every day where informed leaders take actions […]

Combat Fitness Test (CFT)

The Combat Fitness Test (CFT) is a physical fitness test of the United States Marine Corps, and is used in complement to the USMC Physical Fitness Test (PFT). The CFT is a 300-point test with an emphasis on functional fitness related to operational demands. Males and females perform the same exercises but are scored differently, […]

Sailor Creates Advancement Exam Study Guide for Shipmates

APRIL 13, 2021 – A Sailor assigned to Region Legal Service Office Mid-Atlantic has created an advancement exam study planner for his fellow shipmates, and it is available for download on MyNavy Portal and Navy COOL. The Next Generation Study Planner (NGSP) is an automated tool that uses exam bibliography data to create an individualized […]

Sailor Creates Advancement Exam Study Guide for Shipmates

APRIL 13, 2021 – A Sailor assigned to Region Legal Service Office Mid-Atlantic has created an advancement exam study planner for his fellow shipmates, and it is available for download on MyNavy Portal and Navy COOL. The Next Generation Study Planner (NGSP) is an automated tool that uses exam bibliography data to create an individualized […]

Financial Literacy Key to Good Credit, Healthy Finances

APRIL 9, 2021 – The staff of Fort Campbell’s Army Community Service-Financial Readiness program strive to empower Soldiers and Families to understand and take charge of their finances. ACS-Financial Readiness also works with personal finance counselors who are embedded at brigades and major units across the installation. “They are embedded at the units to be […]

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