#### robb-flynn

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I should answer the following question:

*A square array at 10 GHz needs 40 dB gain out to ±60° in both planes. The internal loss is 3 dB and SWR limit 3:1. The beam broadening factor is 1.2. How many elements are needed?*

The instantaneous bandwidth is 10%. What is the minimum number of time delay devices that the array needs to only suffer a 3 dB loss at band edges?.

The instantaneous bandwidth is 10%. What is the minimum number of time delay devices that the array needs to only suffer a 3 dB loss at band edges?

Can anyone help me? In the hypothesis of considering a square array with half-wavelength spacing, I used the empirical formula "D0=32400cos(theta0)/(theta_x * theta_y)" (used, in turn, in the gain expression), but the number of elements that came out is just 3 :-(, thus suggesting the array would be 3x3, which I think is too small for 40dB of gain.

Thanks in advance.