NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
improved equivalent circuit for twin slot terahertz receiversSeries-fed coplanar waveguide embedding circuits are being developed for terahertz mixers using, in particular, submicron-sized superconducting devices, such as hot electron bolometers as the nonlinear element. Although these mixers show promising performance, they usually also show a considerable downward shift in the center frequency, when compared with simulations obtained by using simplified models. This makes it very difficult to design low-noise mixers for a given THz frequency. This shiftis principally caused by parasitics due to the extremely small details (in terms of wavelength) of the device, and by the electrical properties of the RF choke filter in the DC/IF line. In this paper, we present an improved equivalent network model of such mixer circuits which agrees with measured results at THz frequencies and we propose a new set of THz bolometric mixers that have been fabricated and are currently being tested.
Document ID
20060030006
Document Type
Conference Paper
External Source(s)
Authors
McGrath, W. R.
Date Acquired
August 23, 2013
Publication Date
September 16, 2002
Subject Category
Communications and Radar
Distribution Limits
Public
Copyright
Other
Keywords
HEB slot antennas CPW