Ultra‐Wideband Multidomain Modulation for Pulse LFM Radar Deception

An ultrawideband multidomain modulation method for pulse linear frequency modulation (LFM) radar deception, leveraging a dynamic Mach–Zehnder modulator (MZM) and fiber delay links, is proposed. The structure consists of RF transceivers and a MZM‐based module with time‐delay links to achieve high‐consistency phase, amplitude, and time‐delay modulation across an ultrawide bandwidth. By dynamically configuring the biased voltage of MZM at maximum amplitude transmission point (MATP), minimum amplitude transmission point (MITP), and quadrature point (QTP), the system generates intrapulse and interpulse deception signals that jam radar target detection. Subsequently, theoretical analyses and simulations demonstrate the feasibility of jamming pulse LFM radar through multidomain modulation. The final experiment results with the 0, 5, 10, and 25 km fibers show excellent modulation and deception performance, achieving a frequency response bandwidth of 14 GHz. Compared to conventional techniques such as metasurface‐based jamming or digital RF memory (DRFM) systems, this approach offers superior bandwidth, consistency, and flexibility, enabling simultaneous countermeasures against radars operating in diverse frequency bands. The results highlight its potential as a low‐complexity, high‐fidelity solution for next‐generation electronic warfare.