Design of concurrent penta - band based low noise amplifier for vehicular communications

摘要

In this work, a new concurrent penta-band low noise amplifier (CPB-LNA) that works at navigational frequencies viz., 1.2 GHz, 1.5 GHz and wireless Communication frequencies viz., 2.45 GHz, 3.3 GHz and Dedicated Short Range Communication frequency (DSRC), 5.8 GHz for vehicle to vehicle communications is designed and analysed. This circuit has a distinct input matching network which resonates at all desired five frequency bands simultaneously and is achieved by adapting frequency transformation method. The output matching circuit comprises of simple LC matching network designed by using load-pull methodology. The CPB- LNA is simulated using Advance Design System (ADS). The power gain of CPB- LNA is 15.09 dB at 1.2 GHz, 14.368 dB at 1.5 GHz and 14.945 dB at 2.4 GHz, 14.302 dB at 3.3 GHz and 12.075 dB at 5.8 GHz. Noise figure (NF) of 0.48 dB at 1.2 GHz, 1.7 dB at 1.5 GHz and 1.07 dB at 2.4GHz, 0.572 dB at 3.3 GHz and 1.201 dB at 5.8GHz are achieved. Input and output return loss is below -12 dB for all desired frequency bands.