| | Silicon mm-Wave Imaging Arrays | |
| | |
| |
Speaker
| | Charles G. Sodini |
| | | | |
| | Date | | Nov 13, 2009 |
| | | | |
| | Time | | 11:00 am
|
| | | | |
| | Location | | B02 Coordinated Science Laboratory |
| | | | |
| | Sponsor | | Coordinated Science Laboratory |
| | | | |
| | Event type | | Academic |
| | | | |
| | Views | | 2479 |
| | | | |
|
|
| |
| |
| The advancement of silicon processes combined with the demand for electronics with faster performance has generated a great deal of interest toward millimeter wavelength circuit applications. Several imaging applications exist for circuits operating in the millimeter wavelength regime including concealed weapons detection and automotive radar for collision avoidance systems. Both of these applications benefit from increased spatial resolution obtained by increasing the carrier frequency made possible by advanced silicon technologies.
We envision an active imaging receiver that consists of an array of 1000 antenna and per-antenna processor (PAP) units with an operating frequency of 77GHz. The 77-GHz input signal is amplified and downconverted by a mixer with a 76-GHz local oscillator, to obtain an intermediate frequency (IF) of 1GHz. The IF signal is digitized by a 10-bit analog-to-digital converter (A/D) sampling at 4 GHz. Along with the A/D converter each PAP contains digital logic that estimates the phase and amplitude of the IF signal and reduces the data rate to the order of a kilohertz. After data rate reduction, a central processing unit performs digital beamforming on the aggregated data from the array to achieve an expected frame rate of 30 fps. In this talk, a description of the overall system and the key circuits in the PAP including the front-end circuits with flip-chip integrated wideband antennas will be described. |
| |
| |
|
|
