Abstract
Future space-based observatories for the far infrared and sub-mm wave radiation, such as SPICA and the OST telescope, will need ultra-sensitive background limited detectors at frequencies above 1THz. We present a leaky-lens antenna design, composed of a leaky slot fed by a coplanar wave guide, which can be used to couple the absorbed power to a Kinetic Inductance Detector. The slot is coupled to a dielectric lens to achieve directive patterns with a high aperture efficiency. This antenna provides with a frequency coverage over an octave, and can be easily scaled up to 10THz using e-beam lithography.
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