Dr. Chinmoy Saha’s research contribution encompasses key areas of applied Electromagnetics in general and state of the art techniques and methodologies in the area of i) microwave and mm wave circuits and antennas, ii) multi-functional antennas for modern wireless applications, iii) metamaterial inspired circuit and antennas, iv) wireless power transfer and energy harvesting and v) optical fiber based sensors, in particular. One of the key contributions, evolved from an effective collaboration between his research group and National Remote Sensing Centre, Hyderabad is the design, fabrication and realization new set of feed antennas for satellite tracking applications. As shown in the block diagram and the fabricated antenna prototype in Fig. , the proposed X-band tracking antenna system consists of one large-aperture corrugated horn acting as main element to extract the communication (sum port) signal and four side-launched circular waveguide elements around the central corrugated horn acting as tracking elements by extracting error signals in both azimuth and elevation [1]. The realized dual polarized compact antenna acts as feed for a 4.5 m Cassegrain ground-station reflector antenna and currently operational for efficient communication and tracking of Low Earth Orbit (LEO) satellites.