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RF Power Distribution Engineering

When should Wilkinson, resistive, 90-degree or 180-degree RF networks be used?

Choose by the required phase relationship, bandwidth, loss and isolation rather than by port count alone. A Wilkinson network is the usual starting point for equal 0-degree split or combine paths with useful output isolation and low excess loss over its designed band.

Choose by the required phase relationship, bandwidth, loss and isolation rather than by port count alone. A Wilkinson network is the usual starting point for equal 0-degree split or combine paths with useful output isolation and low excess loss over its designed band.

A resistive divider can cover very wide bandwidth, including low frequency or DC in some implementations, but adds unavoidable resistive loss and usually offers weaker branch isolation. A 90-degree hybrid creates quadrature paths for balanced amplifiers, image-reject architectures or phased networks; a 180-degree hybrid creates sum/difference or differential paths.

Compare every candidate at the same frequency, impedance, reference plane and termination state. The acceptance set should include total and excess loss, amplitude and phase balance, isolation, return loss, average and peak power, temperature, load mismatch and the rating of any isolation termination.

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