Designs and builds radars (air surveillance, fire control, airborne), electronic-warfare systems that detect and jam enemy signals, and the RF modules inside them. BEL is the main production agency; private firms make the transmit-receive modules, signal processors and sub-systems.
Why it matters
Every 2026 approval round included sensors: Arudhra radars for the Navy and a ground-based jammer (GBMPJ) on 7 Sep 2026, AKASH TARANG anti-drone EW on 3 Jul 2026. Electronics is the most indigenised slice and the fastest to convert from approval to order, and BEL guides to >₹55,000 Cr of FY27 orders.
Where the value pool sits
A large and growing share of every platform's cost. Margins are among the best in defence (BEL guides ~28% EBITDA for FY27; Data Patterns and Astra earn high gross margins on design-led work).
Key drivers
Air-defence and drone threats
Fighter radar localisation (Uttam AESA)
Electronic warfare upgrades across all three services
Potential bottlenecks
Gallium-nitride chips and some RF parts imported
Long qualification on platforms
Skilled RF engineers
Investor metrics to watch
Order inflow and order book
Gross margin
Share of design-led (own IP) vs build-to-print work