Spatial Power Combiner With Low-Impedance Inputs and Increased Isolation

A 2.5-Ω, 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.