On 10 May 2006 14:07:59 -0700, "Bobby"
wrote:

All,

If you were given a phased array of 30 elements, which provided a
formed beam of 3.1dB/K, and you were required to determine the dB/K of
a single element from that 30, how would you do it? Would it be
3.1-10*LOG10(30)?

Also, would the net combiner gain, including beamforming losses, plus
the single element dB/K be equal to the 3.1dB/K?

Thanks in advance.

Bobby.

Hi Bobby,

Gain is not proportioned across elements even though there is a
correlation between their count and the total gain.

dB/K is for noise temperature, not element count. Your equation
3.1-10*LOG10(30)?
suggests a temperature of 30º absolute, not 30 elements.

73's
Richard Clark, KB7QHC