TY - GEN
T1 - Wireless-Optical Signal Converter Utilizing Stacked-Patch Antennas and Electro-Optic Substrates
AU - Murata, Hiroshi
AU - Aya, Hironori
AU - Inoue, Toshiyuki
AU - Sanada, Atsushi
AU - Wijayanto, Yusuf Nur
AU - Kanno, Atsushi
AU - Kawanishi, Tetsuya
N1 - Funding Information:
This research results were achieved in part by the research project of “Radio technologies for 5G using Advanced Photonic Infrastructure for Dense user environments” (RAPID), the Commissioned Research of National Institute of Information and Communications Technology (NICT), Japan.
Publisher Copyright:
© 2019, Springer Nature Singapore Pte Ltd.
PY - 2019
Y1 - 2019
N2 - We have proposed and developed a new wireless-optical signal converter utilizing stacked-patch antennas with a narrow gap and electro-optic (EO) crystal films for millimeter-wave radio-over-fiber systems. This converting device utilizes a structure of vertically stacked-patch antennas like the Yagi–Uda antenna, with a hybrid substrate composed of EO crystal films and low-dielectric-constant material plates. The electric field for wireless-optical signal conversion and the size of the patch antenna are increased by introducing the antenna and substrate stacked structure. Therefore, the conversion efficiency from wireless to optical signals can be improved. In the analysis by use of HFSS, the operational frequency was shifted to the higher range by 7Â GHz, and the optical modulation index was improved by 3.2Â dB with the double-stacked structure. In the experiments, the operational frequency shift by 8Â GHz and the modulation index improvement by 3.0Â dB were verified successfully, and the measured frequency response and directivity were in good agreement with the designed ones. The conversion of wireless 60Â GHz band signals with QPSK modulation and the transfer of the converted signal over 1Â km long fiber were also demonstrated.
AB - We have proposed and developed a new wireless-optical signal converter utilizing stacked-patch antennas with a narrow gap and electro-optic (EO) crystal films for millimeter-wave radio-over-fiber systems. This converting device utilizes a structure of vertically stacked-patch antennas like the Yagi–Uda antenna, with a hybrid substrate composed of EO crystal films and low-dielectric-constant material plates. The electric field for wireless-optical signal conversion and the size of the patch antenna are increased by introducing the antenna and substrate stacked structure. Therefore, the conversion efficiency from wireless to optical signals can be improved. In the analysis by use of HFSS, the operational frequency was shifted to the higher range by 7Â GHz, and the optical modulation index was improved by 3.2Â dB with the double-stacked structure. In the experiments, the operational frequency shift by 8Â GHz and the modulation index improvement by 3.0Â dB were verified successfully, and the measured frequency response and directivity were in good agreement with the designed ones. The conversion of wireless 60Â GHz band signals with QPSK modulation and the transfer of the converted signal over 1Â km long fiber were also demonstrated.
KW - Electro-optic effect
KW - Optical modulator
KW - Planar antenna
KW - Radio over fiber
KW - Yagi–Uda antenna
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U2 - 10.1007/978-981-13-7086-1_15
DO - 10.1007/978-981-13-7086-1_15
M3 - Conference contribution
AN - SCOPUS:85068610158
SN - 9789811370854
T3 - Lecture Notes in Electrical Engineering
SP - 219
EP - 232
BT - Air Traffic Management and Systems III - Selected Papers of the 5th ENRI International Workshop on ATM/CNS, EIWAC 2017
A2 - Koga, Tadashi
PB - Springer Verlag
T2 - 5th ENRI International Workshop on ATM/CNS, EIWAC 2017
Y2 - 14 November 2017 through 16 November 2017
ER -