USA as Represented by Secretary of the Navy

Reniery Cevallos

Kevin A Boulais

Walter D Sessions

Francisco Santiago

Karen J Long

Pearl Rayms-Keller

Michael S Lowry

Lucas R Hale

Natasha Laguodas Wilkerson

Sarah C Weston

A metal lens is provided for length compacting a horn antenna across a frequency bandwidth. The metal lens includes a feed guide segment having an input cross-section, an intermediate segment, and an exit segment. The feed guide segment receives a signal from the horn antenna along a carry direction; an intermediate segment that expands from the input cross-section laterally to the carry direction. The intermediate segment incorporates an intermediate split vane perpendicular to the carry direction to divide the signal along the carry direction. The exit segment incorporates a plurality of terminating split vanes lateral to the carry direction for transmitting the output signals.

Broadband metal lens antenna

A material is provided for switching dielectric constant between distinct first and second values responsive to electromagnetic radiation having a specified energy. The material includes a medium transparent to the radiation and a plurality of particulates. Each particulate has a dipole that assumes one of distinct first and second parameters that correspond to the first and second values. The particulates are suspended within the medium. The parameters are either dipole span or charge strength. The dipole of each particulate sets to the first parameter by default and sets to the second parameter in response to the radiation. The particulates can be composed from undoped semi-insulating gallium arsenide. The medium can be polymethylmethacrylate, for example.

Broadband artificial dielectric with dynamically optical control

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La Plata, MD, United States of America

Reniery Cevallos