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Effective area(Also called effective aperture.) In antenna design, the ratio of the received power available at the terminals of an antenna to the power per unit area in the incident wave. For all antennas, effecti [..]
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Effective areaThe unrestricted collecting area of a telescope after obstructions in the optical path have been taken into account.
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Effective areaFor a diaphragm actuator, the effective area is that part of the diaphragm area that is effective in producing a stem force. Usually the effective area will change as the valve is stroked – being at a [..]
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