Session 2.6e: Tutorial- UAV GNSS Jamming Concepts and Techniques
Tracks
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| Wednesday, November 19, 2025 |
| 1:30 PM - 2:30 PM |
| Sutherland Theatre |
Details
Global Navigation Satellite System (GNSS) signals are a critical component of Position, Navigation, and Timing (PNT) services, which underpin modern military and civilian operations. Effective denial of GNSS reception can be achieved through targeted jamming, a capability that has evolved alongside advancements in anti-jamming technologies. Controlled Radiation Pattern Antennas (CRPAs) represent a significant enhancement over fixed antenna designs, employing beamforming and null-steering to suppress interference sources.
This presentation outlines key concepts in GNSS jamming, with a focus on techniques to overcome CRPA resilience. Topics include planning and deploying jamming networks, determining jammer power and placement relative to antenna characteristics, and modelling CRPA behaviour under various beam suppression strategies.
Three primary methods of beam suppression—uniform linear array null-steering, adaptive beamforming with rapid beam/null switching, and statistical mitigation models—are examined for their impact on jamming effectiveness. Operational considerations such as frequency selection, bandwidth, antenna geometry, and environmental clutter are also addressed, providing a comprehensive view of the strategies and technical parameters that shape GNSS jamming outcomes.
Speaker
Mr John Montecastro
RF Engineer
ATDI South Pacific
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Biography
John Montecastro is an RF Engineer at ATDI South Pacific, specialising in spectrum engineering, wireless network modelling and management. His main responsibilities include providing technical training, consultancy, and support across a wide range of wireless technologies such as 4G/5G mobile networks, broadcasting, and critical communications systems.
John is deeply involved in the electronic warfare domain, delivering advanced training and simulation support on topics including counter-UAS operations, MANET network planning, and threat detection modelling. His work frequently involves complex RF scenario design, mission analysis, and software integration using advanced simulation tools such as HTZ Warfare.
He has worked closely with Australian and international Defence organisations, contributing to projects focused on spectrum dominance, coverage/interference management, and situational awareness. John’s role often bridges the gap between strategic concept development and hands-on technical implementation, helping defence and government users extract real operational value from sophisticated modelling environments.
