Broadband Antenna

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A broadband antenna means the antenna with wideband radiation characteristics. To make a broadband antenna, we can use a helical, a biconical, a sleeve, a spiral, and a log-periodic antenna.

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Antenna Engineering CHO, Yong Heui Broadband Antenna

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An antenna array (or array antenna) is a set of multiple connected antennas which work together as a single antenna, to transmit or receive radio waves. The individual antenna elements are connected to a single receiver or transmitter by feedlines that feed the power to the elements in a specific phase relationship. The radio waves radiated by each individual antenna combine and superpose, adding together (interfering constructively) to enhance the power radiated in desired directions, and cancelling (interfering destructively) to reduce the power radiated in other directions. Similarly, when used for receiving, the separate radio frequency currents from the individual antennas combine in the receiver with the correct phase relationship to enhance signals received from the desired directions and cancel signals from undesired directions.

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