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A 2.5-$\Omega $ , 8-way, 1–6 GHz spatial power combiner with increased isolation is presented. Insertion losses are better than 1.8 dB on the 1–6 GHz, except on a few peaks. Isolation is better than −10 dB for 45° inputs pairs and better than −15 dB for other pairs. This power combiner provides wide bandwidth, high isolation, and low input impedance at the same time.