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We present first results from a dark photon dark matter search in the massrange from 44 to 52 $\mu{\rm eV}$ ($10.7 - 12.5\,{\rm GHz}$) using aroom-temperature dish antenna setup called GigaBREAD. Dark photon dark matterconverts to ordinary photons on a cylindrical metallic emission surface witharea $0.5\,{\rm m}^2$ and is focused by a novel parabolic reflector onto a hornantenna. Signals are read out with a low-noise receiver system. A first datataking run with 24 days of data does not show evidence for dark photon darkmatter in this mass range, excluding dark photon - photon mixing parameters$\chi \gtrsim 10^{-12}$ in this range at 90% confidence level. This surpassesexisting constraints by about two orders of magnitude and is the most stringentbound on dark photons in this range below 49 $\mu$eV.

First Results from a Broadband Search for Dark Photon Dark Matter in the $44$ to $52\,\mu$eV range with a coaxial dish antenna