• K.JANSI LAKSHMI
• K.BHARGAV PRASAD
• K.R.DEEKSHA

Today antenna has become a necessity for many applications in recent wireless communication such as Radar, Microwave and space communication. The adaptability of the phased array antenna makes it attractive for a variety of multi-beam applications. Previously, its use was limited mostly to military applications due to the large expenses associated with this type of antenna. In recent years, reduced costs have made phased array antennas successful for a variety of commercial applications. As this technology acceptable on new markets, with it comes the need to learn how to properly calibrate phased array antennas. To date, there have been numerous measurement techniques and methodologies developed for calibrating phased array antennas. The calibration process for a phased array antenna requires adjusting the relative phase between individual radiating elements to form a collimated antenna beam. For an active phased array antenna, the amplitude for each element is also adjusted to achieve a desired beam shape. The fidelity of the adjustment is limited by the number of control bits available for the variable device. Values are controlled using a digital command sent through a beam steering interface. During calibration of antennas for phase adjusting a procedure is laid out for perfect beam forming. Calibration is a process in which phase and amplitude deviations are measured and errors are computed and nullified.

RADAR, Antennas, Phased Arrays, Calibration of Arrays etc.

"REVIEW ON PHASE CALIBRATION OF 445MHz ATMOSPHERIC WIND PROFILING RADAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 8, page no.1654-1656, August-2020, Available :http://www.jetir.org/papers/JETIR2008215.pdf

"REVIEW ON PHASE CALIBRATION OF 445MHz ATMOSPHERIC WIND PROFILING RADAR", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 8, page no. pp1654-1656, August-2020, Available at : http://www.jetir.org/papers/JETIR2008215.pdf