Abstract
The Global Positioning System (GPS) is of about thirty-one satellites orbit round the earth at an altitude of twenty thousand kilometer. A GPS receiver must fetch signals from minimum of 4 satellites to figure out a three-dimensional position. Aerial needs Right-Hand Circular Polarization (RHCP), wide and apex beam width, aerial gain at lower-elevation angles. Microstrip antennas are commonly used in GPS devices, because of their smaller size and simple structure. Although, their beam width isn't very broad and gain drops dramatically at lower- elevation angles. Therefore a cross dipole antenna is used to overcome the shortcomings of microstrip antenna. The crossed dipole antenna comprised of 2 printed dipole, that are placed perpendicular and the quadrature flows can cause RHCP fields. The ground planes are set to reinforce the gain of aerial.
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