天线温度[Antenna Temperature] - 揭示大自然的规律

揭示大自然的规律

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天线温度[Antenna Temperature] [2005-11-7]
iamet 发表在 Ω〖物理〗
The equivalent temperature of the power received at an antenna from a source according to
(1)

(2)

In terms of measured antenna parameters,
(3)

where is the aperture efficiency, G is the antenna gain, and is the measured flux density. can be computed from the Planck law,
(4)

In the Rayleigh-Jeans limit, this becomes
(5)

Antenna temperature then satisfies
(6)

so
(7)
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