This paper introduces a novel free-space terahertz (THz) characterization setup featuring an electronic-based technique and miniature additive-manufactured hemispherical lens antennas. By using in-house custom-made hemispherical lenses. radiation characteristics of the electromagnetic (EM) wave of the measurement setup. e. https://www.roneverhart.com/Doorking-1835-080-Telephone-Entry-System/