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What is the difference between an active (amplified) and passive antenna?

April 26, 2017active amplified antenna passive

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What is the difference between an active (amplified) and passive antenna?

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Active GPS antennas include a built-in Low Noise Amplifier which provides sufficient gain to overcome coax cable losses while providing the proper signal level to the GPS receiver. Active GPS antennas require power from the GPS receiver to operate, through the GPS receiver antenna connector. Passive GPS antennas do not include a Low Noise Amplifier and are best suited to GPS applications requiring a short distance, 1 inch to 3 feet, between the GPS receiver and antenna. Passive antennas require an LNA on the GPS receiver.