Next Article in Journal
LifeChair: A Conductive Fabric Sensor-Based Smart Cushion for Actively Shaping Sitting Posture
Next Article in Special Issue
Paper-Based Sensors: Emerging Themes and Applications
Previous Article in Journal
Development of a User-Adaptable Human Fall Detection Based on Fall Risk Levels Using Depth Sensor
Previous Article in Special Issue
Paper-Based Electrochemical Detection of Chlorate
Article Menu
Issue 7 (July) cover image

Export Article

Open AccessArticle
Sensors 2018, 18(7), 2263; https://doi.org/10.3390/s18072263

Design of Security Paper with Selective Frequency Reflection Characteristics

1
Department of Information and Communication Engineering, Kongju National University, Gongju 31080, Korea
2
National Security Research Institute, Daejeon 34188, Korea
*
Author to whom correspondence should be addressed.
Received: 31 May 2018 / Revised: 8 July 2018 / Accepted: 11 July 2018 / Published: 13 July 2018
(This article belongs to the Special Issue Paper-Based Sensors)
Full-Text   |   PDF [5789 KB, uploaded 13 July 2018]   |  

Abstract

In this research, a security paper based on frequency selective structure technologies was designed and fabricated using selective wave reflection characteristics to prevent the offline leakage of confidential documents. Document leakage detection systems using security papers detect security papers using transceiving antenna gates. For the application of such systems, the structure must be designed with excellent reflection performance and stability at the angle of incidence. For this purpose, a loop and patch-type frequency selective structure based on a four-legged element structure was designed to have X-band frequency reflection characteristics. This design was based on optimized variables and was realized through the screen printing method using silver ink on A4 paper. It was verified that both the design and simulation results matched well. To verify its actual applicability, a detector module operable at 10 GHz was manufactured to observe both the security paper detection range in relation to distance with a signal strength of −10 dBm and the detection area in relation to the number of times that the security paper had been folded. View Full-Text
Keywords: security paper; frequency selective structure; document leakage detection; angle of incidence; four-legged element; screen printing method security paper; frequency selective structure; document leakage detection; angle of incidence; four-legged element; screen printing method
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Lee, S.-H.; Kim, M.-S.; Kim, J.-K.; Hong, I.-P. Design of Security Paper with Selective Frequency Reflection Characteristics. Sensors 2018, 18, 2263.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top