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EBG enhanced dielectric lens antennas for the imaging at sub-mm waves

Author: Baselmans, J.J.A. · Yates, S. · Neto, A. · Bekers, D. · Gerini, G. · Baryshev, A. · Lankwarden, Y.J.Y. · Hoevers, H.
Publisher: European Microwave Association EuMA
Place: Louvain-la-Neuve
Institution: TNO Defensie en Veiligheid
Source:European Microwave Week, EuMW 2008 - 38th European Microwave Conference, EuMC 2008, 27 - 31 October 2008, Amsterdam, The Netherlands, 940-942
Identifier: 241185
doi: doi:10.1109/EUMC.2008.4751609
Keywords: Physics · Antenna arrays · Detectors · Frequency response · Lenses · Microwaves · Millimeter wave devices · Optical instruments · Radiation damage · Silicon wafers · Slot antennas · Beam patterns · Dielectric lens antennas · Electromagnetic band gaps


We have designed a novel sub-mm radiation detector based upon a twin slot antenna placed in the focus of a Si elliptical lens. We use a novel Electromagnetic Band Gap (EBG) super-layer, consisting of 2 1/4 γ dielectric layers of Si (ε=11.7) and SiO2 (ε=4) and a Si carrier wafer to enhance the directivity of the feed. The antenna is coupled to a Kinetic Inductance Detector, KID, an extremely sensitive cryogenic radiation detector operating at 300 mK or lower temperatures. We present the design, implementation and measurements of the full detector, including optical sensitivity, frequency response and beam pattern