Relationship between directional patterns and the electrode structure of the log-periodic dipole antenna arrays for sensitive optical electric field sensors

• Published in: Microwave and optical technology letters Vol. 58; no. 9; pp. 2124 - 2129
• Main Authors: Hidaka, Naomi, Sugama, Hideaki, Tsuchiya, Akihisa, Ishida, Takeshi, Hashimoto, Osamu
• Format: Journal Article
• Language: English
• Published: New York Blackwell Publishing Ltd 01.09.2016; Wiley Subscription Services, Inc
• Subjects: antenna; Antenna arrays; Dipole antennas; Electric fields; Electrodes; Electromagnetic compatibility; log-periodic; microgap; microwave; Microwaves; optical electric field sensor; Sensor arrays; Sensors
• ISSN: 0895-2477; 1098-2760
• DOI: 10.1002/mop.29992

ABSTRACT An evaluation of the sensitivity characteristics of our improved optical electric field sensor (OEFS) that incorporates our log‐periodic dipole antenna array (LPDA‐type OEFS) via a detailed simulation model indicated an excellent but less than perfect outcome (Tsujino et al. PIERS Proc (2012), 1610–1614, Hidaka et al. Microwave Opt Technol Lett, Vol. 57, Issue 6, (2015) 1386–1390). However, in‐depth observations of directional patterns and frequency responses with horizontally polarized microwaves indicated that the microgaps of the electrodes of the LPDA‐type OEFS have a high sensitivity in the lateral direction. This behavior is closely related to the problems regarding electromagnetic compatibility. 2016 The Authors. Microwave and Optical Technology Letters. 58:2124–2129, 2016