Development of a crossed-dipole antenna for future in-ice radio neutrino experiments

We present a new antenna design for in-ice radio experiments that aim to detect ultra-high-energy neutrinos.  In-ice radio experiments utilize antennas that are horizontally polarized and vertically polarized to measure the polarization of the incoming radio signal, which is used to reconstruct the incident neutrino direction.  For experiments with antennas located below the surface of the ice in boreholes, such as the Radio Neutrino Observatory (RNO-G) and the Askaryan Radio Array (ARA), it is a challenge to build a broadband, well-matched, horizontally-polarized antenna that can be deployed into the ice in a relatively small-diameter borehole. We describe the design, construction, and preliminary results for a new horizontally-polarized crossed-fat-dipole antenna that we will investigate using in future in-ice neutrino detection experiments.