Posts Tagged ‘communication satellite’

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Amplifier A device used to boost the strength of an electronic signal.

Amplitude Modulation (AM) Amplitude Modulation is a process of varying the amplitude (height of the carrier wave) of the carrier signal in accordance with the information to be transmitted.

Analog A form of transmitting information characterized by continuously variable quantities, as opposed to digital transmission, which is characterized by discrete bits of information in numerical steps. An analog signal is responsive to changes in light, sound, heat and pressure.

Analog-to-Digital Conversion (ADC) Process of converting analog signals to a digital representation. DAC represents the reverse translation. Antenna Device used for sending or receiving electromagnetic waves. Depending on their use and operating frequency, antennas can take the form of a single piece of wire, a di-pole a grid such as a yagi array, a horn, a helix, a sophisticated parabolic-shaped dish, or a phase array of active electronic elements of virtually any flat or convoluted surface.

Aperture A cross sectional area of the antenna which is exposed to the satellite signal.

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