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A high-gain antenna (HGA) is a directional antenna with a focused, narrow beam width, permitting more precise targeting of the radio signals. Most commonly referred to during space missions , [2] these antennas are also in use all over Earth , most successfully in flat, open areas where there are no mountains to disrupt radiowaves.
13 de dic. de 2011 · A high-gain antenna (HGA) is an antenna with a narrow radio beam that is used to increase signal strength. Learn how HGAs work, what they are used for, and how they are measured in decibels.
The gain of a real antenna can be as high as 40-50 dB for very large dish antennas (although this is rare). Directivity can be as low as 1.76 dB for a real antenna (example: short dipole antenna), but can never theoretically be less than 0 dB. However, the peak gain of an antenna can be arbitrarily low because of losses or low efficiency.
5 de mar. de 2022 · Antenna gain G(θ,φ) is defined as the ratio of the intensity P(θ,φ,r) to the intensity [Wm-2] that would result if the same total power available at the antenna terminals, P A [W], were radiated isotropically over 4π steradians. G(θ,φ) is often called “gain over isotropic” where:
23 de jul. de 2018 · Learn why and how to install a high-gain antenna to boost your Wi-Fi signal. Compare different types, connectors, and brands of high-gain antennas for your router.
Higher gain antennas achieve extra power by focusing on a reduced area; thus, the greater the gain, the smaller the area covered (measured in degrees of beamwidth). Antenna gain and beamwidth always are inversely proportional.
28 de abr. de 2004 · Although the high-gain antenna is used to return the majority of the data collected, if the spacecraft has to turn even a little, the high-gain signal could miss the Earth. The low-gain antenna does not suffer from such a problem because it transmits over a wider volume.
