From Emerson & Cuming Microwave Products, Inc.
ECCOSORB® MF-117, a magnetically loaded epoxy, was selected for a high frequency (84-116 GHz) waveguide termination used in the international Atacama Large Millimeter Array (ALMA).
This specific microwave absorber was chosen for several reasons, specifically bandwidth, and attenuation. However these RF requirements pale in nature to the operational requirements, which required low out-gassing and a service temperature of a cryogenic 4 Kelvin.
Topics of Interest
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