News - Helical Duplexer For VHF/UHF Communications

VHF/UHF frequency bands continue to play an irreplaceable role in both civilian and industrial communications.The helical duplexer boasts precise filtering performance, rugged durability and high cost-effectiveness, making it a top choice for radio systems, repeaters and mobile devices.

The core advantage of this helical mobile duplexer lies in its helical structure design, paired with full-length ¼ λ resonance technology.This design allows tuning within the 150MHz and 380-450MHz frequency ranges while achieving over 85 dB of isolation—effectively filtering out electromagnetic clutter and minimizing insertion loss to the maximum extent.Structurally, the helical duplexer features a compact extruded aluminum housing, complemented by a passivated steel chassis and Teflon-insulated components. Its exterior is coated with corrosion-resistant black vinyl, ensuring stable operation even in harsh outdoor and industrial environments.

⭐Three Core Application Scenarios

1.Low-Power Repeaters: Maintains a stable low Voltage Standing Wave Ratio (VSWR) during prolonged full-load operation, significantly reducing energy loss. Particularly suitable for unattended deployment in mountainous, underground, and other areas, it helps expand communication coverage.

2.Digital and analog wireless radios: Covers the VHF 150 MHz and UHF 380–450 MHz frequency bands, enabling seamless integration with mainstream equipment without the need for additional frequency adjustments. It completely eliminates crosstalk in complex electromagnetic environments, catering to both professional dispatch communications and amateur radio usage needs.

3.Mobile Full Duplex Devices: Boasting a compact structure, vibration resistance, and temperature adaptability, it enables smooth and synchronous signal transmission. It is an ideal matching component for scenarios such as emergency rescue and field operations.

Compared to the bulkiness of traditional duplexer, this product achieves a perfect balance between performance and practicality, with significant advantages in energy efficiency and cost-effectiveness. It is suitable for large-scale deployment in small-scale projects and the upgrading of professional equipment, providing strong support for next-generation VHF/UHF communications.

Contact us for a quote! Widely used in public safety, logistics and transportation, industrial automation, and amateur radio, this product is highly trusted by the market.