E142 Spectral Control of Near-Field Radiation using Pillar-Array Structure

2013 ◽  
Vol 2013 (0) ◽  
pp. 159-160
Author(s):  
Yusuke Ashida ◽  
Daisuke Hirashima ◽  
Kazuaki Fujita ◽  
Katsunori Hanamura
Keyword(s):  
Near Field ◽  
Pillar Array ◽  
Field Radiation ◽  
Spectral Control ◽  
Array Structure

scholarly journals E211 Spectral Control of Near-Field Radiation through Pillar Array Structure

2014 ◽  
Vol 2014 (0) ◽  
pp. _E211-1_-_E211-2_
Author(s):  
Vongsoasup Naphatsom ◽  
Yusuke Ashida ◽  
Daisuke Hirashima ◽  
Katsunori Hanamura
Keyword(s):  
Near Field ◽  
Pillar Array ◽  
Field Radiation ◽  
Spectral Control ◽  
Array Structure

Spectral Control of Near-Field Radiation Through Surface Plasmon Polariton Interference

2013 ◽  
Author(s):  
Daisuke Hirashima ◽  
Katsunori Hanamura
Keyword(s):  
Surface Plasmon ◽  
High Frequency ◽  
Surface Plasmon Polariton ◽  
Radiation Transfer ◽  
Near Field ◽  
Structured Surfaces ◽  
Pillar Array ◽  
Field Radiation ◽  
Spectral Control ◽  
Plasmon Polaritons

Through interference of surface plasmon polaritons (SPPs), near-field radiation transfer between pillar-array-structured surfaces was enhanced compared with that between plane surfaces. Even in nanoscale channels between the pillars, the SPPs could propagate, and then a kind of interference and resonance took place according to the depth of the channel between the pillars. With decreasing pillar height, the frequency at maximum radiation transfer was shifted to the high-frequency side. That is, spectral control of near-field radiation could be achieved using pillar-array-structured surfaces.

Reconstruct the PWM Signal of Switching Power Supplies from the Near Field Radiation

2013 ◽  
Vol 718-720 ◽  
pp. 1792-1796
Author(s):  
Zhong Qun Li ◽  
Kai Xie ◽  
Ying Hao Ye ◽  
Rong Bin Guo ◽  
Xu Fei Wang
Keyword(s):  
Pulse Width Modulation ◽  
Signal Reconstruction ◽  
Near Field ◽  
Buck Converter ◽  
Power Supplies ◽  
Switching Converters ◽  
Switching Power ◽  
Magnetic Components ◽  
Field Radiation ◽  
Switching Power Supplies

A non-contact testing method is proposed for encapsulation treated or insulation coated switching power supplies, which is implemented by reconstructing the pulse width modulation (PWM) signal of switching converters from the near field radiation of magnetic components. The radiation pattern of a buck converter is investigated, and the magnetic field sensing probe and PWM signal reconstruction circuit are also illustrated. The reconstruction testing is carried out on a buck converter; the duty cycle error of the reconstructed PWM signal is less than 0.2%, which validates the proposed method.

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