RF Front End Design for Receiver of Smart GSM Mobile Phone

In this paper, the optimized matching circuit between RF SAW (surface acoustic wave) filter output and RF LNA (low noise amplifier) input on the limited PCB (Print Circuit Board) placement space has been gotten by simulation. With the matching circuit, the conducted sensitivity of receiver of the GSM mobile phone is about -109 dBm. Such good sensitivity can decrease desense (sensitivity degradation) due to spur from the harmonics of the clocks or any other spur, interference, etc. Accordingly, the system ability to sustain interference falling in receiving band can be improved.