Radiation sensor
US5828344A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1991 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Jul 23, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/0031
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radiation sensor for the microwave and millimeter-wave regions incorporates a lens having two parallel focal planes, these being defined by a polarization-selective reflector grid within the lens. One focal plane is occupied by a receive array of crossed dipole antennas with respective mixer diodes. One dipole of each antenna couples to a local oscillator signal and the other couples to a receive signal reflected by the grid. These signals are mixed by the diodes to produce intermediate frequency signals for subsequent processing. The other focal plane is occupied by a transmit array of separately activatable polarization switching antennas arranged to define a range of transmit beam directions. This focal plane may alternatively be occupied by a second receive array.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.