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Low noise hot-electron bolometer mixers for terahertz frequencies

Sergey Cherednichenko (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik) ; Vladimir Drakinskiy (Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik)
JOURNAL OF LOW TEMPERATURE PHYSICS (0022-2291). Vol. 151 (2007), 1-2, p. 575-579 .
[Konferensbidrag, refereegranskat]

Hot-electron bolometer (HEB) mixers are used in many low noise heterodyne radio astronomical receivers. Their noise temperature is at the level of 10-15 times the quantum limit. However, their gain bandwidth is a serious limiting factor. Here we review the state of the art of the HEB mixers gain bandwidth for different materials and substrates. We compare the gain bandwidth of HEB mixers made on bulk substrates and thin membranes. Finally, results for MgB2 thin films for broadband HEB mixers are discussed.

Nyckelord: hot-electron bolometer, terahertz, mixer, NbN, MgB2

Denna post skapades 2009-10-20. Senast ändrad 2017-01-27.
CPL Pubid: 100390


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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Mikrovågselektronik



Chalmers infrastruktur