Design of N-Way Power Divider Based on TE₁₀ Mode Splitting Strategy

This paper presents a novel 1-to-N power division architecture combining overmoded TE10 mode waveguides and modular N-way waveguide-to-microstrip mode converters. By decomposing the TE10 mode field distribution along the narrow wall of a rectangular waveguide, the proposed design enables flexible power splitting into arbitrary output ports (even or odd numbers) through uniform sub-TE10-mode waveguide pathways. To achieve the above function using microwave transmission lines, a tapered transition structure ensures wideband excitation of the overmoded waveguide, while linearly tapered slot antennas (LTSAs) serve as N-way mode converters. Prototypes with two-, three-, and four-channel outputs demonstrate excellent amplitude-phase uniformity (≤0.5 dB amplitude imbalance and ≤5∘ phase deviation) across 6.5-12 GHz, with return loss <-10 dB. The modular 1-to-N power divider enables the rapid reconfiguration of output channels by simply replacing the mode converter module.