Antenna measurement

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ajhsu

Joined: 04 Apr 2004
Posts: 224
Helped: 3

21 Apr 2005 5:56 Antenna measurement

Measured by Horizontal receiver antenna = P_H
Measured by Vertical receiver antenna = P_V

The total power is P_Total

Which one is right

(1) P_total = P_H + P_V (W)
(2) P_total = [(P_H)^2+(P_V)^2]^(1/2) (W)

Where can I find the document explaining this?
Thanks.

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dowjones

Joined: 21 Nov 2001
Posts: 137
Helped: 5

21 Apr 2005 22:55 Antenna measurement

you should write in amplitudes, better than in voltage. They are coherent vector signals and the correct way is amplitude.

Then, E_total = (E_h, E_v) and

P_total = E_total*conjg(Etotal) = E_h^2 + E_v^2 , since the two components are orthogonal. Then it follows
=> P_total = P_h + P_v