Gain (antenna) - Wikipedia
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File:NASA's Lunar Reconnaissance Orbiter (LRO) spacecraft HIGH GAIN ANTENNA - DPLA - 2e0f03d562286a444b0eacc406493e31.jpg - Wikimedia Commons
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Antenna Directivity and Gain, PDF, Antenna (Radio)
Gain (antenna) - Wikipedia
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Gain (antenna) - Wikipedia
What is the reason why an omnidirectional antenna has a low gain compared to other antennas even though it has a large area in comparison to other antennas? - Quora
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File:E-plane gain plots of J antenna variations.png - Wikipedia