Demonstration of wideband metal mesh filters for submillimeter astrophysics using flexible printed circuits

Abstract

We developed a wideband quasi-optical band-pass filter covering 170-520 GHz by exploiting the recent advancements in commercially available flexible printed circuit (FPC) fabrication technologies. We designed and fabricated a three-layered stack of loaded hexagonal grid metal meshes using a copper pattern with a narrowest linewidth of $50\mu \mathrm{m}$ on a polyimide substrate. The measured frequency pass-band shape was successfully reproduced through a numerical simulation using a set of parameters consistent with the dimensions of the fabricated metal meshes. FPC-based metal mesh filters will provide a new pathway toward the on-demand development of millimeter/submillimeter-wave quasi-optical filters at low cost and with a short turnaround time.

arXiv comment14 pages, 11 figures, 2 tables, accepted for publication in Applied Optics

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Cited by in corpus (1)

• Broadband anti-reflection coating for sub-terahertz optics using dielectric multilayers