PT Journal
AU Cherednichenko, S
   Drakinskiy, V
TI Low noise hot-electron bolometer mixers for terahertz frequencies
SO J. Low Temp. Phys.
JI J. Low Temp. Phys.
PY 2008
BP 575
EP 579
VL 151
IS 1-2
DI 10.1007/s10909-007-9695-0
DE HEB; mixer; gain bandwidth; MgB2
AB 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.
ER