Concept of a mixer based on a cold-electron bolometer
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منابع مشابه
Application of Superconducting Hot-Electron Bolometer Mixers for Terahertz-Band Astronomy
Recently, a next-generation heterodyne mixer detector— a hot electron bolometer (HEB) mixer employing a superconducting microbridge—has gradually opened up terahertz-band astronomy. The surrounding state-of-the-art technologies including fabrication processes, 4 K cryostats, cryogenic low-noise amplifiers, local oscillator sources, micromachining techniques, and spectrometers, as well as the HE...
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The performance of hot electron bolometer mixer devices made out of superconducting thin films critically depends on film quality. We discuss various deposition conditions for Nb films and present their properties for a wide thickness range. The obtained film parameters allow to predict the characteristics of our actual devices. We also shortly present a new fabrication process for Nb diffusion...
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We have measured the frequency dependent IF impedance and mixer conversion gain of a small area NbN hot-electron bolometer (HEB). The device used is a twin slot antenna coupled NbN HEB mixer with a bridge area of 1 μm x 0.15 μm, and a critical temperature of 8.3 K. In the experiment the local oscillator (LO) frequency was 1.300 THz, and the intermediate frequency (IF) 0.05-10 GHz. We find that ...
متن کامل11 Th International Symposium on Space Terahertz Technology
We present the measurements and the theoretical model on the frequency dependent noise temperature of a lattice cooled hot electron bolometer (HEB) mixer in the terahertz frequency range. The experimentally observed increase of the noise temperature with frequency is a cumulative effect of the non-uniform distribution of the high frequency current in the bolometer and the charge imbalance, whic...
متن کاملNoise and Conversion Efficiency of Aluminum Superconducting Hot-Electron Bolometer Mixer
We report on microwave measurements of superconducting aluminum hot-electron bolometers (Al HEBs). Diffusion-cooled Al HEB mixers are good candidates for spaceborne applications in the Terahertz frequency range since they are predicted to have small local oscillator (LO) power requirements, intermediate frequency (IF) bandwidths 10 GHz, and a noise temperature lower than that of Nb and NbN HEBs...
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تاریخ انتشار 2005