The microwave spectrum is one of the most valuable natural resource used nowadays in
communication, navigation, and remote sensing. With over a century of heritage, imaging …

We combine newly developed InP HEMT amplifiers operating at 670 GHz with a zero-bias
diode (ZBD) in order to investigate limits on passive imaging performance possible with fully …

This work focuses on a systematic analysis of the potential as well as the limitations of
modern SiGe HBT devices for broadband passive room-temperature detection in the lower …

We describe the results of bistatic scattering measurements covering 325-650 GHz on a
series of well-characterized random rough test surfaces. These have implications for active …

Near the end of the twentieth century, there was renewed excitement about the potential
applications of a type of superconducting detector known as the transition-edge sensor …

Millimeter wavelength radiation holds promise for detection of security threats at a distance,
including suicide bomb belts and maritime threats in poor weather. The high sensitivity of …

Modern science often requires measurements at sub-Kelvin temperatures. Temperatures of
300 mK can be reached by using liquid 3 He, but reaching lower temperatures requires the …