Shure UA874 Active Directional AntennaExperience improved wireless reception with the UA874. This UHF antenna uses a log periodic dipole array to produce a cardioid pattern toward the desired coverage area, achieving greater rejection of RF signals outside the area than standard wave omnidirectional antennas. An integrated amplifier with four gain settings compensates for varying degrees of coaxial cable signal loss. The UA874 can be stand mounted, suspended from the ceiling, or wall