Abstract
Submarine based antenna technology was used in World War I and World War II. From the Second World War, the Submarine antenna technology has become increasingly important in our Country. For the combined operations and Network Centric Warfare concepts, the Submarines are required to communicate with Satellites. To communicate with Satellites, the Submarine based antenna design is a challenging issue and it should take care of variations in the Doppler shift and Faraday's effect. Moreover the look angles, tilt of the main beam and gain are the important parameters in the consideration of an antenna design. It should meet these parameters to communicate with Satellites. The backfire bifilar helix antenna is simple and the compact antenna which is well suited to this need. In this paper the backfire bifilar helix antenna is proposed and designed for Ultra high frequency (UHF) Lower Earth Orbit Satellite Communication. The designed antenna will be simulated and analyzed for various characteristics such as VSWR, Axial ratio, Gain and Radiation patterns at the downlink and uplink frequencies of the UHF LEO Satellite Communication.
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