CA340N4

The CompleTech CA340N4 is a cardioid pattern notch antenna engineered for precision directional communication in the 326-353 MHz frequency range. With an 8 dBi gain and vertical polarization, it delivers focused signal strength while minimizing interference from unwanted directions. The cardioid radiation pattern provides a 229° horizontal beamwidth and a narrow 23° vertical beamwidth, ensuring high front-to-back (F/B) ratio of 30 dB for exceptional signal isolation. This antenna is ideal for applications requiring targeted coverage, such as point-to-point links, wireless backhaul, or interference mitigation in crowded RF environments. Built for durability, the CA340N4 features a UV-resistant ABS/FG radome with closed-cell PU foam filling, rated IP67 for full protection against dust and water ingress. The copper radiator ensures superior conductivity and corrosion resistance, while the DC-short-circuited feed point provides built-in lightning protection. The integrated impedance compensation and RF choke enhance stability and reduce VSWR to less than 1.5 across the operating band, maximizing power transfer and minimizing signal reflection. Designed for industrial and commercial deployments, the CA340N4 mounts securely to poles with diameters between 35-60 mm using an aluminum alloy bracket and stainless steel V-bolts. It withstands wind loads up to 144 N and operates reliably in temperatures from -40°C to +80°C. The N-/TNC-female connector offers versatile compatibility with most RF systems, and the field-adjustable pattern allows for optional beam tilting to optimize coverage in specific scenarios. Whether for telecommunications, broadcasting, or security systems, the CA340N4 combines precision, durability, and performance in a compact, low-wind-load design.