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What factors determine antenna gain?

Updated: 8/10/2023
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13y ago

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It depends upon the type of antenna. For example, a Yagi antenna's gain can be increased by adding elements. A parabolic antenna's gain can be increased by increasing the diameter of the antenna. All antennas can have their gain increased by lowering the loss of the feed line. By replacing regular coaxial cable with nitrogen pressurized coax, the overall gain at the receiving end can be increased. Gain can also be increased by inserting an amplifier between the antenna and the receiver. Another method of increasing gain is to reduce the VSWR, or voltage standing wave ratio.

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9y ago
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13y ago

Antenna gain is the measure of the. directionality of an antenna. It is defined as the output power radiated in a particular direction compared to the power output in any direction by an isotropic omnidirectional antenna. The increase in power output in one particular direction is at the expense of power radiated in other directions. That is, power output can be increased in one direction by decreasing it in other directions.

Another concept related to the antenna gain is effective area. Effective area of an antenna is related to the physical size and shape of an antenna.

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