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About Horn Antennas
Horn antennas, colloquially referred to as gain horn antennas, are used for the transmission and reception of microwave signals. This name is derived from their characteristic flared appearance. The flared portion can be square, rectangular, or conical in shape. The maximum radiation and response corresponds with the axis of the horn. In this respect, the antenna resembles an acoustic horn. Horn antennas are usually fed by waveguides in microwave antenna, high gain antenna and high gain wireless antenna, and microwave antenna applications.
The main operating specifications for horn antennas are operating frequency range and gain. The operating frequency is the frequency range through which the horn antenna will meet all functional specifications. Gain is the ratio of the power required at the input of a loss-free reference antenna to the power supplied to the input of the given antenna to produce, in a given direction, the same field strength at the same distance usually in the direction of maximum radiation. Antenna gain is normally expressed in decibels or dB.
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