Low cost millimeter wave imager
US7583074B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 2005 |
| Grant date | Sep 1, 2009 |
| Priority date | — |
| Expiry date | Dec 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/112
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Low cost millimeter wave imagers using two-dimensional focal plane arrays based on backward tunneling diode (BTD) detectors. Two-dimensional focal arrays of BTD detectors are used as focal plane arrays in imagers. High responsivity of BTD detectors near zero bias results in low noise detectors that alleviate the need for expensive and heat generating low noise amplifiers or Dicke switches in the imager. BTD detectors are installed on a printed circuit board using flip chip packaging technology and horn antennas direct the waves toward the flip chip including the BTD detectors. The assembly of the horn antennas, flip chips, printed circuit board substrate, and interconnects together work as an imaging sensor. Corrugated surfaces of the components prevent re-radiation of the incident waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.