The ZDA 433 MHz UHF Directional Yagi Antenna is a precision-built solution designed to deliver reliable, long-range communication across the 428–438 MHz band. Engineered for demanding outdoor environments, this antenna excels at pulling in weak UHF signals and maintaining clean, stable links for applications where consistent performance matters most. Available in four configurations, the lineup provides up to 14 dBi of focused directional gain with selectable horizontal or vertical polarization for system flexibility. Each unit is rigorously tested to a VSWR of ≤ 1.5 to minimize return loss and protect connected radios. Built from durable aluminum alloy, every model features a 50 Ω N-Female interface, supports up to 200 W input power, and maintains a ≥ 15 dB front-to-back ratio to reduce interference in congested RF environments making it well suited for amateur (HAM) radio, emergency communications, and other critical UHF links. For additional information and complete antenna specifications, download the attached data sheet.