Demonstration of wideband metal mesh filters for submillimeter astrophysics using flexible printed circuits. (arXiv:2003.13240v1 [astro-ph.IM])

Demonstration of wideband metal mesh filters for submillimeter astrophysics using flexible printed circuits. (arXiv:2003.13240v1 [astro-ph.IM])
<a href="http://arxiv.org/find/astro-ph/1/au:+Uno_S/0/1/0/all/0/1">Shinsuke Uno</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Takekoshi_T/0/1/0/all/0/1">Tatsuya Takekoshi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Oshima_T/0/1/0/all/0/1">Tai Oshima</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Yoshioka_K/0/1/0/all/0/1">Keisuke Yoshioka</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Chin_K/0/1/0/all/0/1">Kah Wuy Chin</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kohno_K/0/1/0/all/0/1">Kotaro Kohno</a>

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 $50~mumathrm{m}$ 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.

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