Abstract: An optical and radio frequency (RF) antenna includes a substrate and a spiral pattern formed on and/or in the substrate from a metallic material. The spiral pattern has a central region and peripheral region surrounding the central region. The central region is configured to transmit and receive an optical signal at optical and/or infrared wavelengths and the peripheral region is configured to transmit and receive an RF signal at RF wavelengths. The central region and the peripheral region are configured such that an optical gain pattern of the central region and an RF gain pattern of the peripheral region are co-boresighted.

Abstract: A reduced radar cross section (RCS) antenna does not require housing the antennas in a radar-mitigating radome. Elements of the antenna are made from, or include, frequency selective surfaces that reduce reflection of radar or other signals. In some embodiments, the frequency selective surfaces are electrically tunable, thereby enabling a user or system to dynamically adjust the frequency or frequencies that are mitigated.

Abstract: Phase change materials such as correlated oxides (e.g., such as NbO2, V2O3 and VO2) enable wide tuning of dielectric properties via control of temperature, electric fields, optical fields or disorder. The distinct dielectric states can be volatile or non-volatile depending on how the phase is created. Possible fabrication techniques for oxide and insulating matrix composites may include sequential/co-deposition routes as well as local controlled disorder. By combining the distinct insulating and metallic states in these systems and by control of the ground state via induced defects, artificial electronic composites, whose properties can be tuned, could be manufactured. The composites can be integral components of coplanar waveguide devices and microwave switches. More broadly, tunable electronic composites using oxide systems that undergo insulator-metal transitions may have wide usage in frequency tunable devices, including microwave devices.

Abstract: A multi-chip module is provided including a multiplier configured to multiply a frequency of an input signal into a predetermined Ka-band frequency center channel, a modulator configured to modulate the center channel, and an amplifier configured to amplify a modulated signal for output.

Abstract: A multi-chip module is provided including a multiplier configured to multiply a frequency of an input signal into a predetermined Ka-band frequency center channel, a modulator configured to modulate the center channel, and an amplifier configured to amplify a modulated signal for output.