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A Balanced Amplifier Separates the Signal From Its Image
Two travelling-wave amplifiers and hybrid couplers doubled the usable image-rejected bandwidth in the reported superconducting setup.
Summary
Two travelling-wave amplifiers and hybrid couplers doubled the usable image-rejected bandwidth in the reported superconducting setup.
A three-wave-mixing amplifier can confuse a signal with an idler at its image frequency. This experiment balanced two kinetic-inductance travelling-wave parametric amplifiers between hybrid couplers, spatially separating signal, pump and idler. The authors report about 20 decibels of gain across nearly an octave, pump rejection below minus 20 decibels and average image rejection near minus 15 decibels. The result is a laboratory architecture for cleaner broadband readout, not a complete quantum measurement system.
Why it matters
Two travelling-wave amplifiers and hybrid couplers doubled the usable image-rejected bandwidth in the reported superconducting setup.
Limits and context
- The result is a laboratory architecture for cleaner broadband readout, not a complete quantum measurement system.
Key claims
Two travelling-wave amplifiers and hybrid couplers doubled the usable image-rejected bandwidth in the reported superconducting setup.
Qualification: The result is a laboratory architecture for cleaner broadband readout, not a complete quantum measurement system.
Evidence: source-2026-10-19-017
Sources
- arXiv preprint 2610.23810, original v1arXiv · primary research
Corrections
No corrections have been recorded for this story.