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

• Main Authors: Li, S. (Author), Liu, L. (Author), Meng, F. (Author), Sun, L. (Author), Wu, H. (Author), Yang, Y. (Author), Yu, C. (Author)
• Format: Article
• Language: English
• Published: MDPI 2022
• Subjects: antenna; Antenna arrays; Aperture efficiency; Compact arrangements; Coplanar waveguide; coplanar waveguide (CPW); Coplanar waveguides; Efficiency; Microwave antennas; Microwave generation; Microwave power transmission; Polychlorinated biphenyls; Power transmission; Size optimization; Slot antennas; Slot array antennas; Substrate integrated waveguide; substrate integrated waveguide (SIW); Substrate integrated waveguides; Substrate-integrated waveguides; Transition structures; W bands; W-band; W-band antennas
• Online Access: View Fulltext in Publisher

 A W-band slot array antenna based on a substrate integrated waveguide (SIW) for microwave power transmission (MPT) is proposed in this paper. By size optimization, the transition from the rectifier element to the antenna is limited to a small size. It realizes a compact arrangement of the radiating slots, which not only improves the aperture efficiency of the antenna but also makes it easy to integrate into a large-scale array. For antenna testing, a coplanar waveguide–SIW–rectangular waveguide transition structure is added at the end of the antenna, and an antenna with this transition structure is processed by PCB printing technology and measured. The measured reflection coefficient is less than −10 dB at 90–96 GHz, the aperture efficiency is greater than 60% at 93.5–94.5 GHz, the maximum gain is 13.2 dB at 93.5 GHz, and the aperture efficiency is 79%. The test results of the antenna show that the antenna has a good performance and can be applied to the MPT system as a rectenna. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.