Thin Leadframe QFN Package Design of RF Front-Ends for Mobile Wireless Communication

摘要

Systems and methods are disclosed herein for a low cost, compact size, and thin half-etched leadframe quad-flat no-leads (QFN) package that integrates RF passive elements in the QFN leadframe for linearized PA design and RF FEMs. The integrated RF passive elements in the QFN leadframe may include RF inductors (e.g., meanders lines or spirals) for amplifier bias or RF matching, extension bar of the ground paddle for inter-stage matching or jumper pads for connection. The integrated RF passive elements may also include transmission lines for output power matching, coupled line structures such as RF couplers, RF divider or combiner realized using transmission lines with proper impedance and length, jumper pads for adjusting the bond wire length, etc. The RF parameters of the integrated passive elements are adjustable using different length and number of wire bond for fine tuning the performance of the PAM or the RF FEM.