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In this paper, we have presented the simulation results on a novel metamaterial absorber, which can work in the terahertz regime. The results show that the absorber has a smooth broadband absorption peak of 400GHz with the absorptivity over 95%.
We describe the project for the construction of a Terahertz (THz) beamline to be called TeraFERMI at the seeded FERMI Free Electron Laser (FEL) facility in Trieste, Italy.
This paper compares three different procedures for characterising the Noise Temperature and Conversion Loss of a millimetre wave mixer. To carry out this study a 183 GHz sub-harmonic mixer has been measured using three alternative procedures, i.e. the “Attenuator”, the “Gain” and the “Noise injection” procedures. Furthermore for every measurement procedure three different detection methods have been...
We propose a simple THz wave plate based on the structured parallel metal plates. The fast and slow propagation properties for TE and TM waveguide modes bring in the controllable birefringence in wide frequency region. Using this optics, we experimentally obtained intense single-cycle THz pulse with the circular polarization.
A terahertz metamaterial comprised of C-shaped SRRs was experimentally devised and demonstrated to exhibit high-efficient and broadband anomalous refraction with strong phase discontinuities. The generalized refraction properties of the proposed metamaterial, including the effect of various incident angles and polarizations were investigated at broad terahertz frequencies. By employing such metasurface,...
Here, we demonstrate the possibility of employing a novel low-loss dielectric material as substrate for free-space THz devices through the design, fabrication and characterization of broadband high-transparency high-pass mesh filters. Time-domain spectroscopy measurements show that a transmittance higher than 75% is achieved over a bandwidth of 1 THz.
A broadband rectangular waveguide calorimeter is fabricated to establish a reliable mm-wave power standard in the frequency range from 110 GHz to 170 GHz. Two types of mm-wave power meter are calibrated using this calorimeter and their calibration factors are reported with their uncertainties. Uncertainty calculations are based on the Monte Carlo method.
For the modeling and design of communication systems in the lower THz frequency range the propagation conditions need to be known. We show a comparison of ultra broadband channel measurements from 50 GHz to 325 GHz in different scenarios related to typical office and industry environments.
A broadband detector for electrical field measurements is presented in this paper, deploying an attenuated dipole resonance. High sensitive zero-bias Schottky diodes with anode diameters of 1.5µm allow electrical field characterization down to 1.6 V/m at millimeter wave frequencies. The covered frequency range from 1 to 100 GHz shows a potential voltage response flatness of ±1 dB.
We report an easy fabricated, broadband and high-absorbance coating for terahertz radiometry. The spectral properties of this coating in THz region were characterized with a home-made terahertz time-domain spectrometer. The measured spectral reflectance is less than 0.3% ranging from 0.2 THz to 0.5 THz and less than 0.1% ranging from 0.5 THz to 2.0 THz.
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