A Novel Design of a 5.8 GHz Bandpass Filter for RF Energy Harvesting Applications

This paper presents the design and simulation of a Band-Pass Filter (BPF) specifically designed for RF energy harvesting applications at 5.8 GHz. Using microstrip technology, the BPF is compact and suitable for integration into RF energy harvesting systems. It enables effective signal processing by allowing desired frequencies to pass while suppressing higher-order harmonics. The design was optimized and validated using the Advanced Design System (ADS) solver, the proposed structure is mounted on an FR-4 substrate with a thickness of 1.6 mm, a dielectric constant of 4.4, and a loss tangent of 0.025. The results highlight the filter's good performance, with a narrow passband centered at 5.8 GHz, low reflection, and transmission losses, demonstrating its potential to improve the efficiency and reliability of RF energy harvesting systems for low-power applications such as IoT sensors and wearable devices.