Presentation Information
[B-20-12]Investigation of the angular characteristics of a receiving FZPA for Lunar SSPS
◎Hidetoshi Kataoka1, Kenji Itoh2, Yoshiyuki Fujino1 (1. Graduate School of Toyo, Toyo Univ., 2. Kanazawa Institute of Technology)
Keywords:
FZP,SSPS,Lunar surface
Japan decided to participate in the Artemis program in 2019. Under this program, sustained human activities will be conducted on the Moon. Therefore, securing and ensuring a stable supply of electricity will be necessary. In this context, a lunar Space Solar Power System (SSPS) has been proposed as one method of power generation. However, it is difficult to use parabolic antennas when configuring a rectenna on the Moon.Therefore, a rectenna panel consisting of three layers—a rectenna surface equipped with a flat-plate antenna primary radiator, a Fresnel zone plate (FZP) layer for focusing, and a reflector—has been proposed. It is believed that by arranging multiple primary radiators on the rectenna surface, the panel can be regarded as a multi-focus rectenna. In this study, we calculated the angular characteristics of the FZP antenna using the PO method and investigated whether it is possible to achieve a wider beamwidth for the FZPA by varying the F/D ratio to 0.4, 0.6, 0.8, and 1.0. The results confirmed that, among the simulations conducted in this study, the gain loss at wide angles was minimal when the F/D ratio was 0.8 and the focal length was 11.2λ.