AN-900-043-A is an application note about RD04HMS2 single-stage amplifier, which contains equivalent circuit, PCB layout, component list and standard deliverable, thermal design of heat sink, typical RF characteristics.
The document provides an overview of the RDO4HMS2 evaluation board, a surface‑mounted RF power amplifier covering 890‑950 MHz. It includes the equivalent circuitry, PCB layout, component list, thermal design guidelines, and typical RF performance graphs.
Key sections cover the board dimensions and material, a detailed parts list with manufacturers, heat‑sink thermal resistance calculations, and measured results such as output power versus input power, frequency response, and drain current characteristics.