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A low-noise micromachined millimeter-wave heterodyne mixer using nb superconducting tunnel junctions
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | DeLange, Gert Jacobson, Brian R. Hu, Qing |
| Copyright Year | 1996 |
| Description | A heterodyne mixer with a micromachined horn antenna and a superconductor-insulator-superconductor (SIS) tunnel junction as mixing element is tested in the W-band (75-115 GHz) frequency range. Micromachined integrated horn antennas consist of a dipole antenna suspended on a thin Si3N4 dielectric membrane inside a pyramidal cavity etched in silicon. The mixer performance is optimized by using a backing plane behind the dipole antenna to tune out the capacitance of the tunnel junction. The lowest receiver noise temperature of 30 +/- 3 K (without any correction) is measured at 106 GHz with a 3-dB bandwidth of 8 GHz. This sensitivity is comparable to the state-of-the-art waveguide and quasi-optical SIS receivers, showing the potential use of micromachined horn antennas in imaging arrays. |
| File Size | 293931 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970023072 |
| Archival Resource Key | ark:/13960/t6159ht58 |
| Language | English |
| Publisher Date | 1996-03-25 |
| Access Restriction | Open |
| Subject Keyword | Solid-state Physics Dipole Antennas Horn Antennas Sis Superconductors Micromachining Heterodyning Imaging Techniques Tunnel Junctions Millimeter Waves Bandwidth Waveguides Silicon Nitrides Josephson Junctions Radio Receivers Antenna Arrays Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
