Antenna Theory - FAQ's With Answers - 2.
This page contains basic questions and short notes on some of the keywords on antenna theory: 6) What are the different types of aperture? Effective aperture. Scattering aperture. Loss aperture. Collecting aperture. Physical aperture. 7) Define different types of aperture? Effective aperture (Ae): It is the area over which the power is extracted from the incident wave and delivered to the load is called effective aperture. Scattering aperture (As): It is the ratio of the reradiated power to the power density of the incident wave. Loss aperture (Ae): It is the area of the antenna which dissipates power as heat. Collecting aperture (Ae): It is the addition of above three apertures. Physical aperture (Ap): This aperture is a measure of the physical size of the antenna. 8) Define Aperture efficiency? The ratio of the effective aperture to the physical aperture is the aperture efficiency. i.e Aperture efficiency = hap = Ae / Ap (dimensionless). 9) ...