Terahertz full horn-antenna characterization

We present result of broad-band terahertz (THz) transmission through a couple of horn antennas. Efficiency is high leading to a strong enhancement of THz field at horn-antenna waist (50 × 200 μm2). The device provides an easier and stronger way to couple energy into monomode waveguide than the traditional usage of lens. The dispersion of the pulse is in quite good agreement with a modified rectangular waveguide model, and the phase center as well as the divergence of the field in the E- and H-planes also well predicted by horn antenna theory.