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Dual Frequency Band Microstrip Array Antenna

Microstrip Array Antenna and it’s Application

The antenna plays a very important role in determining the overall system performance of airborne as well as space borne synthetic aperture radar (SAR) systems. The basic driving force for frequency and polarization selection of an SAR system is the application targeted for. SAR systems are generally operated at L, C and X band for most of the applications. There is an increasing demand of simultaneous multi-frequency SAR for space-borne and air-borne SAR systems to get images of targets of different signatures during one visit of a particular region of the earth. A wholly independent antenna for each frequency band would be inefficient and a considerable saving in space and weight can be achieved if multi-frequency band SAR signals can be transmitted and received via a single aperture antenna. Moreover, for airborne applications, SAR data at different frequencies like C and X band can be acquired without landing the aircraft for mounting of a different antenna at different frequency bands if a multi-frequency SAR system is used on board the aircraft. Antennas at different frequency bands will occupy a larger area which may be prohibited by the available space in the radome of the aircraft.Thus, there is a strong need to develop antennas which fulfill the requirement of multi-frequency operation for SAR applications.

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Dual Frequency Single Aperture Microstrip Patch Antenna Element for SAR Applications


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