Measuring VHF Detector Linearity using a Quantum-Based Source

Published

August 30, 2024

Author(s)

Jeremy Thomas, Nathan Flowers-Jacobs, Anna Fox, Alain Rufenacht, Paul Dresselhaus

Abstract

We demonstrate the use of a Josephson Arbitrary Waveform Synthesizer (JAWS) for linearity measurements of two instruments: an RF power sensor and a fast ADC. The VHF-JAWS source consists of a chip with 12,810Josephson junctions located in a cryocooler and driven to produce quantum-based ac waveforms at frequencies up to 50.05 MHz and power up to -19 dBm. We first confirm that the device is operating correctly by measuring the dc bias current quantum-locking range and then measure the system output power with an RF power sensor and a high-speed digitizer. After removing an overall scale factor, the ten-nanowatt scale differences between the programmed JAWS values and the measured values indicate better than ±0.5 % DUT linearity for frequencies in the VHF band.

Conference Dates

July 6-11, 2024

Conference Location

Denver, CO, US

Conference Title

2024 Conference on Precision Electromagnetic Measurements (CPEM)

Pub Type

Conferences

Download Paper

https://doi.org/10.1109/CPEM61406.2024.10646166

Local Download

Keywords

Josephson junction arrays, power measurement standards, digital-analog conversion, signal synthesis, superconducting integrated circuits, superconducting microwave devices

Citation

Thomas, J. , Flowers-Jacobs, N. , Fox, A. , Rufenacht, A. and Dresselhaus, P. (2024), Measuring VHF Detector Linearity using a Quantum-Based Source, 2024 Conference on Precision Electromagnetic Measurements (CPEM), Denver, CO, US, [online], https://doi.org/10.1109/CPEM61406.2024.10646166, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=957413 (Accessed December 18, 2024)