POWER CALCULATION FOR array antenna(V 2023.1)

Question

Screenshot 2025-11-05 132746.png

Hello

I am using an "active port" simulation for a 4x1 conformal probe-fed antenna array. My question is: when we select the voltage source for each port (see the screenshot), it is 1 V for each port in my array. Then what is actually the input power of my total array ? For doing the active port simulation, see my other screenshot. Transmit power is by default 0.5Watt. what does it mean ? is it the input power of the array?

half_arc_a_65_final_probe_4by1_array_0.46_lambda_spacing_final_coordinate_fine_mesh_more_number_of_points_E_field_try_coordinate_FEKO_BLOG_Final.cfx

If I want to calculate input power of this array antenna then how to check this ?

Screenshot 2025-11-05 132746.png

Jaehoon · Accepted Answer

"Active power" is the power delivered by the total (array) antennas, which is actually the power from 1. Voltage source … mentioned above.

If no additional loss, "Active power" is the same as "far-field power" = total radiated power. Please check it in POSTFEKO.

Best regards,

Jaehoon

Jaehoon · Accepted Answer

Hello,

"Specify transmit power" in S-parameter configuration has nothing to do with the voltage amplitude in the Standard configuration. I mean independant to each other…

(Please know that the S-parameter configuration doesn't require any source (voltage/current…) definition, but the port definition is enough.)

If you use "Power settings" which was mentioned in my first reply, the total antenna power is forcely determined by the power in the "Power settings" regardless of the voltage amplitude.

Best regards,

Jaehoon

sswh2 · Accepted Answer

@Jaehoon sir thanks for the explanation.