): The ratio of the radiation intensity in a given direction to the average radiation intensity. Accounts for ohmic losses; is antenna efficiency. Effective Aperture ( Aecap A sub e
). Maximum radiation occurs perpendicular to the axis of the array ( 90∘90 raised to the composed with power 270∘270 raised to the composed with power
Antenna and Wave Propagation by K.D. Prasad: A Comprehensive Academic Resource antenna and wave propagation by kd prasad ppt full
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The orientation of the electric field vector ( Ebold cap E ): The ratio of the radiation intensity in
) features a non-uniform current distribution that tapers linearly from a maximum at the center to zero at the open ends. Because of this linear profile, its effective radiation resistance is one-fourth that of an equivalent uniform-current Hertzian dipole:
The highest possible frequency that can be reflected back to Earth at a specific oblique angle of incidence ( θitheta sub i Maximum radiation occurs perpendicular to the axis of
: Ensure the subscripts for integration limits, vector notation (
: Antenna and Wave Propagation (Based on K.D. Prasad)
The wave travels directly from the transmitting antenna to the receiving antenna. Since it cannot bend around the Earth, it is limited by the curvature of the Earth.