Simulation and optimization of rectenna systems.

Area of Science:

• Electromagnetics and Wireless Power Transfer
• Antenna and Circuit Co-design

Background:

• Rectenna systems convert radio frequency (RF) energy to DC power.
• Previous rectenna simulations often separated antenna and circuit analysis, making simplifying assumptions.
• Accurate prediction of the complete rectenna system's performance under varying conditions was challenging.

Purpose of the Study:

• To develop a unified, simulation-based method for predicting the performance of a complete rectenna system.
• To enable rectenna designers to assess system behavior across diverse incident field parameters and frequencies.
• To facilitate the optimization of the entire rectenna system during the design phase.

Main Methods:

• An entirely simulation-based approach integrating all rectenna components: antenna, matching circuits, and load circuit.
• Incorporation of the radiation part using Thevenin theorem within the simulation framework.
• Analysis of performance variations with incident field power density, angle of incidence, and operating frequency.

Main Results:

• The proposed method accurately predicts the performance of the complete rectenna system.
• It allows for performance prediction at the design stage, which was previously unavailable.
• The method enables system-wide optimization over the operating frequency range.

Conclusions:

• The novel simulation method provides a comprehensive tool for rectenna design and optimization.
• It overcomes limitations of previous approaches by integrating all system components.
• Experimental validation confirms the accuracy and utility of the proposed simulation technique.