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Article

Demonstration of Digital Retrodirective Method for Solar Power Satellite

by 1,* and 1,2
1
Department of Space and Astronautical Science, SOKENDAI (The Graduate University for Advanced Studies), Sagamihara 252-5210, Japan
2
Institute of Space and Astronautical Sciences (ISAS), Sagamihara 252-5210, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Rafael González Ayestarán
Electronics 2021, 10(4), 498; https://doi.org/10.3390/electronics10040498
Received: 10 December 2020 / Revised: 12 February 2021 / Accepted: 12 February 2021 / Published: 20 February 2021
(This article belongs to the Special Issue Antenna Array Processing for Wireless Power Transfer)
This work presents digital retrodirective method to do microwave power transfer (MPT) for solar power satellite (SPS). Due to space environment, there is concern of antenna deformation, which will affect beam forming. Size of SPS is large and synchronization among antenna modules is difficult. Flexibility regarding frequency selection for MPT is also a requirement for SPS. Digital Retrodirective method determines phase of pilot signal and power signal is transmitted with conjugate phase. Digital Signal Processing (DSP) circuit is used for digital retrodirective method. Experiment is performed without antenna deformation and with antenna deformation cases. Digital retrodirective method performs beam forming without synchronization among antenna modules and corrects effect of antenna deformation successfully. Flexibility for frequency selection is also achieved by the DSP circuit. The presented results confirm that digital retrodirective method is a good candidate for power transfer from SPS. View Full-Text
Keywords: beam forming; pilot signal; phase conjugation beam forming; pilot signal; phase conjugation
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MDPI and ACS Style

Raza, M.; Tanaka, K. Demonstration of Digital Retrodirective Method for Solar Power Satellite. Electronics 2021, 10, 498. https://doi.org/10.3390/electronics10040498

AMA Style

Raza M, Tanaka K. Demonstration of Digital Retrodirective Method for Solar Power Satellite. Electronics. 2021; 10(4):498. https://doi.org/10.3390/electronics10040498

Chicago/Turabian Style

Raza, Mudassir, and Koji Tanaka. 2021. "Demonstration of Digital Retrodirective Method for Solar Power Satellite" Electronics 10, no. 4: 498. https://doi.org/10.3390/electronics10040498

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