Analyzing the performance of class-F power amplifier by comparing microstrip and SSL/SIL transmission lines based matching networks for smart parking solutions for improved efficiency and output power.

A cascade Class-F power amplifier (PA) is proposed for smart parking solutions. Input and output matching network are designed and analyzed using Microstrip line (MSL), suspended shielded lines (SSL) and shielded inverted line (SIL). Class-F PA design is based on the harmonic termination of an even and odd harmonic for improved efficiency. Class-F PA produces non-overlapping drain current of half sinusoidal form and voltage waveforms of half square form to reduce power dissipation. Suspended shielded (SSL) and shielded inverted lines (SIL) have low attenuation, low propagation loss, low insertion loss (S11) and low dielectric constant as compared to Microstrip line (MSL). The main objective of the work is to compare the transmission line like MSL, SSL and SIL for better performance of Class-F PA in terms of high efficiency and bandwidth. Design is based on even and odd harmonic termination to get non-overlapping current and voltage waveform. Simulation is performed using advanced design system (ADS) software using gallium nitride high electron mobility transistor (GaN HEMT) device from CREE. The results show improved power added efficiency (PAE) of 80 to 85%, gain of 15dB and output power (Pout) of 44dBm with suspended shielded (SSL) and shielded inverted (SIL) line as compared to Microstrip line (MSL) at 0 to 3GHz frequency. [ABSTRACT FROM AUTHOR]