PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
A W-band unamplified direct detection radiometer module is described that provides a wideband response and is
scalable to large arrays. The radiometer design is intended to provide sufficient sensitivity for millimeter wave imaging
applications with a goal of 2K noise equivalent temperature difference (NETD) at a 30 Hz frame rate.
This effort leverages previously reported device scaling to increase sensitivity. We present a radiometer module
designed for 60 GHz RF bandwidth that utilizes HRL's antimonide-based backward tunnel diode. An impedance
matching circuit with on- and off-chip elements, as well as ridged waveguide, provides a wideband match to the
detectors. Modules were designed with two different microwave substrates: 125 micron thick quartz and 100 micron
thick alumina. flip-chip bonding of the detectors is amenable to automated pick-and-place for high volume
manufacturing. The modular nature of the array approach allows large arrays to be manufactured in a straightforward
manner. We present the design approach along with both electromagnetic simulations and measured performance of the
modules. This work was supported by phase II of DARPA's MIATA program.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
James H. Schaffner, Jonathan J. Lynch, Keith V. Guinn, Joel N. Schulman, Harris P. Moyer, Ross Bowen, Marcel Musni, "A wideband radiometer module for an unamplified direct detection scalable W-band imaging array," Proc. SPIE 6948, Passive Millimeter-Wave Imaging Technology XI, 694807 (18 April 2008); https://doi.org/10.1117/12.776893