Radiation Pattern Measurements of an Integrated Transverse Electromagnetic Horn Antenna Using a Terahertz Photomixing Setup

We report experimental radiation pattern measurements of a transverse electromagnetic horn antenna at the millimetric/sub-millimetric frontier (280–350 GHz). The antenna is fed by a monolithically integrated uni-travelling-carrier photodiode illuminated by an optical beatnote (photomixing) at 1.55
$\mu{\rm m}$
. The detection is performed using an electronic sub-harmonic mixer and the whole characterization system is working at room temperature. Radiation patterns are measured in the
${\rm E}$
-plane and compared with electromagnetic simulations with a good agreement.