April 1, 2016

Seminar conducted in collaboration with IETE on “Recent Trends in Radar Antenna Technology”

By MVJCE

With respect to the above subject TE Department, MVJCE has conducted Seminar on “Recent Trends in Radar Antenna Technology” at Smt. Rajalakshmi Seminar Hall, MVJCE which is an intra- department program to update the faculty members and students to Radar Antenna Technology on 1st April 2016 from 10.00AM to 11.30 AM

The Seminar emphasized on the following: The technology developments in radar antenna continued to be driven by the demanding performance and operational requirements of military radar systems. Initial requirement was to provide air/surface/sea surveillance and accordingly country started working on reflector based antenna technology. These radars were equipped with single mechanically rotated reflector and a single RF energy source (Klystron). But their limitations were, less volume coverage, slow beam positioning, and increased reaction time i.e. slow data update rate and less reliability. An approach to increase the volume coverage was building an antenna array with multiple simultaneous beams in RF domain. Antenna arrays with single wide beam in Tx and multiple simultaneous beam in Rx were developed. But they were still left with other aforementioned limitations. To overcome these limitations, the electronically scanned antennas array technology was developed in country. These antennas had multiple radiating elements distributed over fixed aperture and associated with transmit/receive (T/R) modules that employ GaAs (Gallium Arsenide, an important semiconductor used to make MW frequency integrated circuits) MMIC chips. There beam formations are being done either in RF or in digital domain.

The systems with beam formation in digital domain are on the cutting edge of military radar antenna technology. They provide numerous advantages over conventional mechanically scanned antennas, particularly for fighter aircraft, including lower radar cross-section, simultaneous multiple-target engagement capabilities, extended target-detection range, higher survivability, greater reliability, and reduced weight and size. Today’s military radar functions are diversified owing to multi-functional requirements like primary radar detection, IFF, electronic warfare, secure communications etc.,. These demanding needs led to the development of shared aperture antenna systems by combining functionalities of several antennas into a single aperture. An effort is being made to develop this technology in order to meet present and futuristic operational requirements. Speaker: Mr. V.S Gangwar, Scientist from LRDE (DRDO), Ministry of Defense, Govt. of India, Bangalore

seminar_01

seminar_03