Sb-heterostructure diode detector W-band NEP and NEDT optimization

H. P. Moyer; R. L. Bowen; J. N. Schulman; D. H. Chow; S. Thomas III; T. Y. Hsu; J. J. Lynch; K. S. Holabird

doi:10.1117/12.667284

5 May 2006 Sb-heterostructure diode detector W-band NEP and NEDT optimization

H. P. Moyer, R. L. Bowen, J. N. Schulman, D. H. Chow, S. Thomas III, T. Y. Hsu, J. J. Lynch, K. S. Holabird

Proceedings Volume 6211, Passive Millimeter-Wave Imaging Technology IX; 62110J (2006) https://doi.org/10.1117/12.667284
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Sb-heterostructure diodes have become the detector of choice for W-band millimeter wave imaging cameras now being commercialized or in prototype development. Here we optimize the diode impedance to yield a minimum noise equivalent power (NEP). The goal is to decrease the gain required of the front-end LNA. Measured W-band sensitivities for two diodes are 3500 and 5500V/W. Their zero bias differential resistance values imply Johnson noise limited NEP's of 0.98 and 0.83pW/Hz^1/2, respectively, much less than obtained from conventional biased Schottky diodes. A MMIC version of the diode detector has been simulated with an integrated bandwidth of ~ 30 GHz at W-band. The simulated temperature sensitivity (NEΔT) with an HRL W-band LNA on the front end is <1°K.

Citation Download Citation

H. P. Moyer, R. L. Bowen, J. N. Schulman, D. H. Chow, S. Thomas III, T. Y. Hsu, J. J. Lynch, and K. S. Holabird "Sb-heterostructure diode detector W-band NEP and NEDT optimization", Proc. SPIE 6211, Passive Millimeter-Wave Imaging Technology IX, 62110J (5 May 2006); https://doi.org/10.1117/12.667284

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