A triad antenna shield includes a housing positionable radially external to three loop antennas of a resistivity logging tool in a wellbore. The housing defines three slot sets each corresponding to a respective one of the loop antennas to overlap at least a portion of the respective loop antenna. At least one slot of each slot set is perpendicular to a trace angle with respect to a longitudinal axis. Further, each slot set extends around a circumference of the triad antenna shield and through a first layer of the housing.