Hongbo Zhang, Maojia Geng, Giovanni Crupi, Jialin Cai
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Design of Broadband Doherty Power Amplifier Based on Spoof Surface Plasmon Polaritons
Spoof surface plasmon polariton (SSPP) is a technique for controlling and manipulating electromagnetic waves within the microwave frequency range through ultrathin corrugated metallic strips. According to current research, SSPPs are primarily used for designing passive circuits and single-ended power amplifiers (PAs). This work employs SSPP theory for the design of a broadband high-efficiency Doherty power amplifier (DPA). The input and output matching networks of the carrier power amplifier (CPA) and peak power amplifier (PPA) are designed based on SSPP structure in order to improve the back-off (BO) efficiency of the DPAs. Results of measurements indicate that the proposed height-variable SSPP-based DPA achieves a saturated output power of 41.4 dBm and a maximum efficiency of 61.1% within the frequency range of 1.6–2.2 GHz, whereas BO efficiency remains above 51.2%, demonstrating the effectiveness of the proposed techniques.
期刊介绍：
The scope of the Journal comprises all aspects of the theory and design of analog and digital circuits together with the application of the ideas and techniques of circuit theory in other fields of science and engineering. Examples of the areas covered include: Fundamental Circuit Theory together with its mathematical and computational aspects; Circuit modeling of devices; Synthesis and design of filters and active circuits; Neural networks; Nonlinear and chaotic circuits; Signal processing and VLSI; Distributed, switched and digital circuits; Power electronics; Solid state devices. Contributions to CAD and simulation are welcome.
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