The Defence Electronics Research Laboratory (DERL) was established in 1962 to work on the design and development of communications and radar systems.

The DERL built a ground-based missile guidance system in the 1970s. Other activities include:

• Providing "electronic support" for DRDO's Integrated Guided Missile Development Program.
• Designing and developing "phased array monopulse identification friend or foe" system in conjunction with the Rajendra phased array radar for the Akash surface-to-air missile.
• Designing and developing "components, antennas, and sub-systems for HF [high-frequency], to microwave, and millimetric wave frequencies."

Sources:
[1] Defence Research & Development Organisation, "Defence Electronics Research Laboratory," www.drdo.org;
[2] Dr. N.C. Birla and B.S. Murthy, eds., "Seekers, Antennas, Pyrosystems, Devices and Electronic Subsystems," Indian Defence Technology: Missile Systems (DRDO, Ministry of Defence, December 1998), pp. 187-188.