CompleTech CA450N4 cardioid pattern notch - Frequency range: 440-475 MHz - Gain: 8 dBi - Polarization…

The CompleTech CA450N4 is a cardioid pattern notch antenna engineered for precise directional signal transmission in the 440-475 MHz frequency range. With a gain of 8 dBi and vertical polarization, this antenna delivers focused RF energy for applications requiring high directivity and minimal interference. The copper radiator ensures low-loss signal propagation, while the ABS/FG PU foam radome provides environmental protection against moisture, UV exposure, and mechanical stress. The N-/TNC-female connector offers versatile compatibility with standard RF systems, supporting both N-type and TNC interfaces for seamless integration. Key specifications include a VSWR of less than 1.5, ensuring efficient power transfer and reduced signal reflection. The antenna mounts securely on poles with diameters between 35-60 mm, accommodating a wide range of installation scenarios. With a wind load rating of 128 N, the CA450N4 maintains stability in harsh outdoor conditions, including high winds and variable weather. The compact design and durable construction make it ideal for telecommunications, security systems, industrial automation, and private land mobile radio (PMR) networks. Compared to omnidirectional or collinear alternatives, the cardioid pattern minimizes unwanted signal reception from rear and side directions, enhancing signal-to-noise ratios in crowded RF environments. The 8 dBi gain provides a measurable improvement in range and clarity for point-to-point links, particularly in urban or industrial settings where multipath interference is common. The antenna’s frequency range aligns with UHF bands used in public safety, transportation, and utility communications, ensuring compatibility with existing infrastructure. For engineers and system integrators, the CA450N4 offers a cost-effective solution without sacrificing performance. Its lightweight design (2490 g) and corrosion-resistant materials reduce maintenance requirements, while the standardized mounting interface simplifies deployment. Whether used in fixed base stations, temporary setups, or mobile applications, this antenna delivers consistent performance across its operational band.