Design of RF PA Using Reconfigurable Spoof Surface Plasmon Polaritons
Maojia Geng, Hongbo Zhang, Jialin CaiABSTRACT
A reconfigurable spoof surface plasmon (SSPP) structure is employed in the design of a radio frequency (RF) reconfigurable power amplifier (PA) in this work. Analyses of fundamental SSPP units are conducted systematically. This design makes use of SSPP structures for both input and output matching networks. A PIN‐switch‐based reconfigurable SSPP stub is used in the output matching network for reconfigurability. Gradient algorithms are used in the ADS tool to further optimize the performance of the PA. The measurements indicate that the SSPP‐based reconfigurable PA achieves an output power (Pout) of 40.3 dBm at 2.42 GHz with 60.6% power‐added efficiency (PAE), and 40.5 dBm at 3.44 GHz with 59.7% PAE, with a compact layout area of 124.6 × 54.5 mm. As compared with recently reported works, the proposed PA maintains competitive output power and efficiency while achieving size reduction.