Asynchronous Electric Field Vector Measurement Using EO Sensor in Millimeter Wave Band

Kamada, Junpei; Uchida, Hirohisa; Tojyo, Makoto; Oikawa, Yoichi; Miyaji, Kunio; Hisatake, Shintaro

doi:10.23919/piers.2018.8597874

Cited by 1 publication

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In principle, the photonic LO tracks any type of frequency/phase-modulated signal. Moreover, our new scheme can be used to investigate antennas with complex modes and polarization 34 , through the polarization state measurement method demonstrated in 35 . Although there is still some room for improving the measurement accuracy, particularly, for the higher spatial-frequency components, the asynchronous measurement technique using the proposed integrated multichannel probe would be a promising and versatile inspection technique for on-chip antenna devices, in-vehicle radars, etc.…”

Section: Resultsmentioning

confidence: 99%

Asynchronous electric field visualization using an integrated multichannel electro-optic probe

Hisatake

Kamada

Asano

et al. 2020

Sci Rep

View full text Add to dashboard Cite

The higher the frequency, the more complex the scattering, diffraction, multiple reflection, and interference that occur in practical applications such as radar-installed vehicles and transmitter-installed mobile modules, etc. Near-field measurement in “real situations” is important for not only investigating the origin of unpredictable field distortions but also maximizing the system performance by optimal placement of antennas, modules, etc. Here, as an alternative to the previous vector-network-analyzer-based measurement, we propose a new asynchronous approach that visualizes the amplitude and phase distributions of electric near-fields three-dimensionally without placing a reference probe at a fixed point or plugging a cable to the RF source to be measured. We demonstrate the visualization of a frequency-modulated continuous wave (FMCW) signal (24 GHz ± 40 MHz, modulation cycle: 2.5 ms), and show that the measured radiation patterns of a standard horn antenna agree well with the simulation results. We also demonstrate a proof-of-concept experiment that imitates a realistic situation of a bumper installed vehicle to show how the bumper alters the radiation patterns of the FMCW radar signal. The technique is based on photonics and enables measuring in the microwave to millimeter-wave range.

show abstract

Section: Resultsmentioning

confidence: 99%