Research on QV-Band Power Division and Combination Network Based on Ridge Waveguides

This paper leverages the advantages of single-mode, high-bandwidth transmission in ridge waveguides to design a QV-band ridge waveguide 1-to-2 power divider and a four-port directional coupler. This addresses the issue of narrow single-mode operating bandwidth in traditional waveguide power divider-combiner structures, which is caused by internal multimode characteristics and electromagnetic discontinuities, thereby establishing an integrated power distribution and combining network; The power divider employs a ridge waveguide H-plane T-shaped structure to optimize impedance discontinuities and field distribution, while the radial combiner achieves efficient conversion from the TM₀₁₀ mode to the coaxial TEM mode through four-path radial ridge waveguide inputs and a central metal disk. Simulation results indicate that the ridge waveguide power divider has a relative bandwidth of 64% (31.1–60.39 GHz), while the radial combiner has a relative bandwidth of 31.4% (39.07–53.57 GHz). Using a back-to-back cascaded test setup, experimental verification was completed via a ridge-to-standard waveguide transition adapter. Within the 40–50 GHz operating band, the network exhibits a return loss greater than 15 dB and an insertion loss less than 1.2 dB, with excellent amplitude-frequency characteristics and phase consistency. This structure offers broadband performance, miniaturization, low loss, ease of fabrication, and potential for multi-channel expansion, providing a novel engineered solution for high-power microwave systems in the QV band.