Gain and noise bandwidth of NbN hot-electron bolometric mixers
- 16 June 1997
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 70 (24) , 3296-3298
- https://doi.org/10.1063/1.119143
Abstract
We have measured the noise performance and gain bandwidth of 35 Å thin NbN hot-electron mixers integrated with spiral antennas on silicon substrate lenses at 620 GHz. The best double-sideband receiver noise temperature is less than 1300 K with a 3 dB bandwidth of ≈5 GHz. The gain bandwidth is 3.2 GHz. The mixer output noise dominated by thermal fluctuations is 50 K, and the intrinsic conversion gain is about −12 dB. Without mismatch losses and excluding the loss from the beamsplitter, we expect to achieve a receiver noise temperature of less than 700 K.Keywords
This publication has 7 references indexed in Scilit:
- Length scaling of bandwidth and noise in hot-electron superconducting mixersApplied Physics Letters, 1996
- Large bandwidth and low noise in a diffusion-cooled hot-electron bolometer mixerApplied Physics Letters, 1996
- Noise temperature limit of a superconducting hot-electron bolometer mixerApplied Physics Letters, 1996
- Electron temperature fluctuation noise in hot-electron superconducting mixersApplied Physics Letters, 1995
- Conversion gain and noise of niobium superconducting hot-electron-mixersIEEE Transactions on Microwave Theory and Techniques, 1995
- Superconducting terahertz mixer using a transition-edge microbolometerApplied Physics Letters, 1993
- A Low Temperature Bolometer Heterodyne Receiver for Millimeter Wave AstronomyReview of Scientific Instruments, 1973