Published Paper Details:

Radars working in high-frequency (HF) band covers frequencies between 3 MHz and 30 MHz with wavelengths of 100 m to 10 m. Due to these large wavelengths, HF radars are not appropriate for operation from satellites. For remotely sensing of the ocean HF radars are basically operated from the coast. Remote sensing by means of HF radar is based on sky wave or ground wave propagation. Refraction by the ionosphere allows large propagation ranges to be achieved. This paper deals with ground-wave propagation and presents a novel system for a HF radar used only for single channel of 5MHz (range-200Km), for application of sea scattering radar, in which radar receiver system is designed with receiver consist of a magnetic loop antenna operating at 5MHz used for reception, and receiver section containing front-end unit which has matching circuit for received signal with initial amplification blocks and a back-end unit consisting of amplifier unit to boost received signal with filter unit to get desired signal filtered out, and also signal processing unit. This paper mainly focuses on design of radar receiver section.