High efficiency submillimeter-wave imaging array

Abstract

The period of a focal array is limited by the angular sampling and the f number of the system. This fact will limit the efficiency of imaging array systems to around 50 % • Recently it been demonstrated that the use of a dielectric layer on top of an array of apertures can improve this efficiency limit. In this paper, we describe a similar structure that improves the efficiency in imaging applications and that it is easy to manufacture due to its compatibility with planar lithographic techniques.

Terahertz Antenna Technology for Space Applications

“…Higher directivity can further be achieved using a leaky wave. A dielectric super layer between the feed and the iris allows the waveguide the wave modes which otherwise would not be available (Llombart et al 2008;Chattopadhyay 2010). Llombart and Chattopadhyay (2010) further adopted this concept by attaching a microlens to enhance the directivity.…”