Passive limiter shields electronics from RF threats
Teledyne Microwave UK’s B3LT98026 is a passive wideband limiter designed to protect sensitive receiver front ends in defense and military communication systems. It operates from 0.1 GHz to 20 GHz and withstands up to 10 W peak input power under defined pulse width and duty cycle conditions.
The device enhances the survivability of Radar Electronic Support Measures (R-ESM) and Electronic Warfare (EW) systems operating in complex threat environments. It provides continuous, always-on protection against high-power RF and emerging Directed Energy Weapons (DEWs).
Across the operating band, the limiter maintains a maximum insertion loss/noise figure of 2.0 dB and a maximum input/output VSWR of 1.5:1. A fast 40-ns recovery time enables rapid return to nominal sensitivity following high-power events. The device operates over a temperature range of −20°C to +85°C, supporting deployment in demanding environments.
The compact SMA-based housing supports straightforward integration into existing architectures without requiring system redesign. The B3LT98026 is also compatible with Teledyne’s Phobos mast top unit and can accommodate additional RF elements, such as filters, when required.
The B3LT98026 is now available for evaluation in defense and EW systems.
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