Mini-Circuits provides a recommended PCB layout and footprint in their application note AN-60-014, which can be found on their website. It's essential to follow this layout to ensure optimal performance and minimize parasitic effects.
The QCN-25D+ has a nominal impedance of 50 ohms. To impedance match, use a pi-network or a T-network topology with resistors and capacitors. You can use online impedance matching tools or consult with a RF design expert to determine the optimal matching network for your specific application.
The maximum power handling of the QCN-25D+ is not explicitly stated in the datasheet. However, according to Mini-Circuits' application engineers, the device can handle up to 2W of continuous power and 10W of peak power. It's essential to derate the power handling based on the operating frequency, temperature, and other environmental factors.
The QCN-25D+ is rated for operation up to 85°C. However, the device's performance and reliability may degrade at higher temperatures. If you need to operate the device in a high-temperature environment, consult with Mini-Circuits' application engineers to determine the feasibility and potential derating requirements.
Common issues with the QCN-25D+ include poor return loss, high insertion loss, and overheating. To troubleshoot, check the PCB layout and footprint, ensure proper impedance matching, and verify the power handling. Consult the datasheet and application notes, and contact Mini-Circuits' technical support if necessary.
QCN-25D+ datasheet
by Mini-Circuits
