This article focuses on the modeling of a quadrature waveguide power divider, taking into account technological requirements and manufacturing feasibility. A relatively simple yet effective device topology is proposed, along with a method for calculating its geometric parameters to operate reliably within a predefined frequency range. The study includes a comprehensive analysis of existing power divider configurations, provides a detailed overview of the theoretical foundations for designing a quadrature waveguide-slot bridge and an in-depth examination of all design stages of the power divider, using the 27–35 GHz frequency range as an example. Based on the developed model, a working prototype was fabricated. Measurements of its frequency characteristics confirmed the validity and practical applicability of the proposed approach. The design methodology developed in this work can be effectively applied to create a quadrature waveguide-slot bridge in any given frequency range, making it a versatile tool for engineers and researchers in the field of microwave technologies.