Abstract: With the advancement of radar transmission technology, the miniaturization and high power density of transmission components have become research hotspots and challenges. Based on this, to enhance the power density of X-band solid-state transmission components, a two-stage gallium nitride power amplifier module was employed, achieving high-power output through compact layout; the 8-way power divider/combiner utilized dual-sided terminals and was processed in two layers, reducing the size by half compared to conventional counterparts without compromising performance. Additionally, aluminum alloy materials and machining were employed to lower the aspect ratio to 5. In the power supply section, a high-frequency half-bridge LLC was used to achieve 2400W DC28V output from DC390V, compressing the size to two-thirds of a full brick. The auxiliary power supplies for +5V, -5V, and 3.3V were designed modularly, integrating EMI filtering circuits, power circuits, control circuits, protection circuits, and filtering circuits into a single package, reducing circuit size by half while meeting performance requirements. A sandwiched structure was adopted, with modulation circuits, power circuits, and amplifier sections arranged on both sides of the component cold plate, further reducing the size of the solid-state transmission component and increasing its power density. Measured results show the component achieved a peak power of 1548W, flatness ≤±0.36dB, output spurious ≤-71.55dBc, and a power density 21.32% higher than components in the same band, reaching 4690.91W/ft³, demonstrating significant advantages.