A Substrate Integrated Waveguide-Based W-Band Antenna for Microwave Power Transmission

Area of Science:

• Electromagnetics and Applied Electrophysics
• Antenna Theory and Design
• Wireless Power Transmission

Background:

• Microwave Power Transmission (MPT) systems require efficient antennas for energy harvesting.
• Substrate Integrated Waveguide (SIW) technology offers a pathway to miniaturized and integrated microwave components.

Purpose of the Study:

• To propose and validate a W-band slot array antenna utilizing SIW technology for MPT applications.
• To optimize the antenna design for compact size, high aperture efficiency, and seamless integration into larger arrays.

Main Methods:

• Design and size optimization of a W-band SIW slot array antenna.
• Development of a coplanar waveguide-SIW-rectangular waveguide transition for testing.
• Fabrication using PCB printing technology and experimental measurement of antenna performance.

Main Results:

• Achieved a reflection coefficient below -10 dB from 90-96 GHz.
• Demonstrated aperture efficiency exceeding 60% between 93.5-94.5 GHz, reaching 79% at 93.5 GHz.
• Measured a maximum gain of 13.2 dB at 93.5 GHz.

Conclusions:

• The developed W-band SIW slot array antenna exhibits excellent performance characteristics.
• The antenna is well-suited for integration into Microwave Power Transmission (MPT) systems as a rectenna.