Trends on Remote Sensing Technology: Receiver Architectures and Antenna Systems

This article presents a brief overview of the remote sensing technologies for the detection and measurements of the geophysical parameters. Several radiometer receiver architectures such as total power, Dicke, noise rejection, hybrid and correlation modules have been discussed along with their structural benefits. Additionally, review of the progress on the associated antenna systems have also been presented. The future potential of the Substrate Integrated Waveguide (SIW) technology for the development of the radiometer antenna system over microstrip patch and rectangular waveguide topology in mm-wave is also discussed.