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This article is a technical report without peer review, and its polished and/or extended version may be published elsewhere.

WiCoPT×Ĩ+¸�"ÌŪ�³�¡ă, DCÌû£ħ+Ɓ�;ĎŠ — FSK/BPSK/QPSK/16QAM�¡ă,ĎŠ—�đ� śŏ� ¶ĭ� Ŭ±� Ŝá� �~Ź�,� áà� Ǝį�

�ƍ�ßÎÒÎÒƂ ĩâÒĺłĿ� ƆęƆÑâÒÛü �890-0065 ƍ�ßĸƍ�ßåź� 1-21-40 �ĤńŗýĚ� ÓÕŒŃĺłƀijĔĒ� ÓÕĿÒĺłó �229-8510 ľÐáĸķē¬åzϦĮž° 3-1-1

E-mail: hiroto.sakaki@ieee.org

�93� űé,ĢŌ=Ĭ�&ñÈ(Ɔ¡=·ă+�ų�;ĢŌñÈƆ¡�ų�Ĝĵ=Ƅ5&�;. ñÈ, Ɔ¡·ăĢŌ�ų×Ĩ,{ŝũƈ-ÌŪ�³�¡ă,ÿоŮ,Ìû£ħ,¸v'�;.ĉȺ'-,ÌŪ�³�¡ă,RF-DC ÌûÿоŮ,¤�+%�&,ğÖsŞČ=ŗ$".FSK,BPSK,QPSK,16QAM T?LOnÌŪ�³=_mRLÅÿоŮ+�¡�,CW�¡ă,Ìû£ħ,¤�(ĘŰ�&, ,Ìû£ħ,¤�=Ţ��".��<,ÌŪ�³+��&6 CW(ĘŰ�&Ìû£ħ-��*:,�%KrcnotU�ƌ�2)Ìû£ħ����(=ļ�". CtqtV ĢŌñÈƆ¡�ų(WiCoPT), T?LOnÌŪ�³, Ɔ¡Ìû£ħ(PCE)

Measured Evaluation of DC Conversion Efficiency with Modulated Signal for WiCoPT Systems

— Conversion Efficiency With FSK, BPSK, QPSK and 16QAM — Hiroto SAKAKI� Satoshi YOSHIDA� Kenjiro NISHIKAWA�, � Shigeo KAWASAKI�

�Dept. of Electrical and Electronics Engineering, Kagoshima University,

1-21-40 Korimoto Kagoshima, Kagoshima, 890-0065 Japan �Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency,

3-1-1Yoshinodai-chuoku Sagamihara, Kanagawa, 229-8510 Japan E-mail: hiroto.sakaki@ieee.org

Abstract Recently, the wireless system, which can transfer data and power simultaneously, called “Wireless communication and power transmission (WiCoPT), has been widely noticed. The major problem of this technic is improvement of the power conversion efficiency (PCE) with modulated input signals. In this report, we measured and analyzed the rectifier operation with modulated signal. As compared with CW, we evaluated the PCE and the rectifier operation with it. The PCE with any modulated signal is lower than the efficiency with CW and we clarified that the higher symbol-rate is, the lower PCE is with modulated signals.

Keyword Wireless Communication and Power Transmission(WiCoPT)ƒDigital Modulated Signal, Power Convergence Efficiency(PCE)

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-5-

5. 3(5 ĉȺ'- WiCoPT ×Ĩ,ġ+´ŀÌŪ�³=�¡

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Ā Ħ [1] áà ōįƒĢŌñÈAYnDt�ų( RFZtaMS?rFƒƆÑñÈŴ�Ò�ťƒVol.95ƒNo.9ƒpp.815-822ƒSep.2012. [2] S. Kawasaki, S. Kawai, T. Yamamoto, K. Takei, H. Seita, “A 5.8 GHz- band active integrated phase array antenna with wireless communication and power transmission functions for space and satellite use,” in 2008 China-Japan Joint Microwave Conf., Shanghai, China, Sep. 2008, pp. 435-438. [3] J.Ho, S.Kim, and A. Poon, “Midfield Wireless Powering for Implantable Systems,” Proceedings of IEEE, Vol.101, No.6, pp. 1369-1378, June 2013, [4] H.Sakaki, S.Yoshida, K.Nishikawa, S.Kawasaki, ”Analysis of Rectifier Operation with FSK modulated Input Signal,” 1st Wireless Power Transfer Conf., Perugia, Italy, May 2013, pp.187-190. [5] Yu-Lin Yangƒ Chi-Lin Tsaiƒ and Chin-Lung Yangƒ“Using pulse Width and Waveform Modulation to Enhance Power Conversion Efficiency under Constraint of Low Input power, ”Proc. of 2012 Asia-Pacific Microwave Conf., no.3A3-04, pp.400-402, Kaohsiung, Taiwan, Dec.2012.

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