High-Gain Antenna (HGA)
Definition - What does High-Gain Antenna (HGA) mean?
A high-gain antenna may also be known as a directional antenna.
Techopedia explains High-Gain Antenna (HGA)
High-gain antennas transmit more power to the receiver, increasing the strength of the signal it receives. As a result of their reciprocity, high-gain antennas can also make transmitted signals 100 times stronger by capturing more energy when used in receiving antenna. As a result of their directivity, directional antennas send fewer signals from a direction other than the main beam. This property reduces interference.
High-gain antennas can also be produced from parabolic antennas, phased arrays and yagi antennas. Antenna gains are defined with respect to hypothetical antennas that radiate equally in all directions – the isotropic radiator. This gain can be measured in decibels (dBi) or, in certain cases, decibels compared to the maximum intensity of the direction of half-wave dipoles (dBd).