Cryogenic Characterization of LTCC Material in Millimeter-Wave Frequencies

This is the authors' abstract. We don't add key points for this paper.

This study presents room temperature and cryogenic (20 K) characterization of the electrical properties of the Ferro A6M-E material, manufactured using LTCC technology, at W-band (75-110 GHz). The resonant ring method was used to design microstrip structures with resonant frequencies at 80, 90, and 100 GHz on a single substrate. S-parameter measurements at the different physical temperatures were obtained. The relative permittivity and loss tangent parameters were calculated, obtaining values of ε r = 6.14 and tan δ = 0.0019 at 300K and ε r = 6.0 and tan δ = 0.002 for 20 K. The calculated dielectric properties show a small variability between room temperature and cryogenic conditions in the W-band. These results are highly relevant for the understanding of the electrical performance of Ferro A6M-E material, particularly in the context of mm and sub-mm wave applications for front-end radio astronomy receivers and space applications, both at room temperature and cryogenic conditions.