R
Rapeepan Kaewon
Researcher at Silpakorn University
Publications - 5
Citations - 9
Rapeepan Kaewon is an academic researcher from Silpakorn University. The author has contributed to research in topics: Polarization (waves) & Interferometry. The author has an hindex of 1, co-authored 5 publications receiving 3 citations.
Papers
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Journal ArticleDOI
Utilization of the cyclic interferometer in polarization phase-shifting technique to determine the thickness of transparent thin-films
Rapeepan Kaewon,Chutchai Pawong,Ratchapak Chitaree,Tossaporn Lertvanithphol,Apichai Bhatranand +4 more
TL;DR: In this article, a cyclic interferometric configuration is chosen to maintain the stability of the operation against external vibrations, and a wave plate is inserted into the common paths to introduce an intrinsic phase difference between the orthogonal polarized beams.
Journal ArticleDOI
Real-Time Double-Layer Thin Film Thickness Measurements Using Modified Sagnac Interferometer with Polarization Phase Shifting Approach
TL;DR: In this article, a modified Sagnac interferometer with a self-referenced polarization and phase-shifting technique for real-time thickness measurement of single and double-layer transparent thin films was presented.
Proceedings ArticleDOI
A Current-mode ACG base on Sub-threshold MOS Translinear Principle
TL;DR: In this paper, a current mode of automatic gain control (AGC) was proposed based on the principle of sub-threshold MOS translinear, which consists of a current-mode exponential amplifier, a precision rectifier, a low pass filter, and an integrator.
Proceedings ArticleDOI
Thickness Measurement of Double Layer Transparent Material Using Triangular Path Cyclic Interferometer
TL;DR: In this article, a non-contact thickness measurement of multi-layer thin films with improving the sensitivity, accuracy, and performance of the measurement techniques is reported, where single and double-layer film thickness measurement using different polarization states were studied.
Proceedings ArticleDOI
A comparison of various patch sizes and feed point positions of graphene microstrip antenna for orthopedic implants
Abstract: An antenna is used in many wireless communication devices, such as mobile phone and radar, as well as in medical devices, such as sensor or transmitter. In the present study, the antenna was designed as a microstrip with graphene as a patch and titanium dioxide as a dielectric substrate. Graphene was used as patch material because of its suitable mechanical, electrical and bio-compatible properties. Thus, it is replaced the metallic patch-material in our simulation. Titanium dioxide was used as dielectric substrate because it has light-weight, corrosion resistance and shape memory. The simulation results report an early test of antenna size variation and various positions of feed point. The result from size variation showed that the length adjustment was more effective than the width one, moreover, it is better than a theoretical size obtained from a mathematical model. Each position of feed point gave a unique reflection coefficient of input and output electromagnetic signals.