In this paper, we propose an assessment up to 325 GHz of Micro Laser Sintering (MLS) metal 3D-Printing technology in order to achieve lightweight and cost-effective millimeter wave (mmW) passive function. We first designed and manufactured a bended WR5 waveguide in order to assess achievable roughness and insertion loss. In a second step, an existing 240 GHz choke horn antenna design, previously manufactured using metal coated Stereo Lithography Apparatus (SLA) and Selective Laser Melting (SLM) technologies, has been prototyped using MLS. Measured performances of the MLS antenna prototype have been benchmarked with SLA and DMLS ones. Achieved performances are promising since without any post processing MLS compete up to 325 GHz with metal coated SLA technology while it enables a metallic part manufactured in a single piece.
A new approach of millimeter wave (mmW) integrated active noise source (NS) is introduced for noise characterization up to 170 GHz. This NS is based on a diode biased in avalanche regime in BiCMOS 55 nm (B55) technology from STMicroelectronics. In order to increase the noise sensitivity of setup using this NS, a two-stage cascode Low Noise Amplifier (LNA) composed of 4 high speed NPN transistors is cascaded at its output, targeting high available Excess Noise Ratios ( . ENRav levels have been extracted, showing tunable values ranged between 0 dB to 37 dB in the 140-170 GHz frequency range.
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