Implementation of a THz quasi-spiral antenna for THz-IR detector

A sub-millimeter quasi-spiral antenna based on a modified Fresnel Zone Plate Lens (FZPL) for the IR range is proposed. The design is part of an integrated receiver, which consists of a Si (silicon) slab where two detector configurations will be printed working at infrared (IR) and sub-millimeter range simultaneously. Various modifications of spiral antennas are evaluated to act as a sub-millimeter wave antenna (operating at 700 μm) and as a modified Fresnel Zone Plate Lens in the Mid-IR range (around 10.6 μm). The design, optimization and fabrication process for the quasi-spiral antenna with the best performance for both functions are presented.