A 4-layer PCB with a solid ground plane and a separate power plane is recommended. Keep the input and output tracks as short as possible and use a common mode choke to reduce EMI.
Use a voltage regulator to maintain a stable supply voltage, and ensure the bias voltage is set to the recommended 5V. Also, use a low-ESR capacitor to decouple the supply voltage.
The maximum power handling capability of the BF998WR,115 is 2W. However, it's recommended to derate the power handling to 1.5W to ensure reliable operation and minimize the risk of thermal shutdown.
Use a low-noise amplifier stage before the BF998WR,115, and ensure the input impedance is matched to the amplifier output impedance. Also, use a high-quality, low-noise power supply to minimize power supply noise.
The recommended operating temperature range for the BF998WR,115 is -40°C to 85°C. However, the device can operate up to 125°C with reduced performance and reliability.
BF998WR,115 datasheet
by NXP Semiconductors
