Characterization of the Dielectric Properties of Commercially Available Low-loss UV-curable Resins from 60 GHz to 90 GHz

In this paper, two important dielectric properties, the relative permittivity and the loss tangent of a new commercially available UV-curable SLA resin sample are determined. The characterization of the dielectric material is performed in the millimetre-wave range using an open-cavity Fabry-Perot resonator. According to the manufacturer’s data ´...

A Review of PA-Antenna Co-design: Direct Matching, Harmonic Tuning and Power Combining

This article reviews the current state-of-the-art of active-integrated antennas co-designed with power amplifiers (PAs). Three strategies to improve output power and power-added efficiency are described using examples, namely direct matching between PA and antenna, tuning of harmonic reflections in the antenna, and in-antenna power combining...

Active Admittance and Impedance of Hexagonally Sampled Dipole and Slot Connected Arrays

Analytical formulations of the active admittance and impedance of connected arrays based on dipole and slot antennas, respectively, when elements are arranged in a hexagonal lattice, are presented. Different canonical dielectric layers stratifications are considered. The formulations is based on multi-layer Green’s function spectral...

Leaky Lens Photo-Conductive Antennas on LT GaAs membranes

Photo-conductive lens antennas (PCAs) exploit the ultra-short photoconductivity phenomenon of specific semiconductors in order to generate pulsed radiation in the THz regime. State of the art PCAs suffer from high dispersion and low radiation efficiency over the large generated bandwidth due to the poor coupling between the antenna and the...

Connected array of coherent photoconductive pulsed sources to generate mw average power in the submillimeter wavelength band