Imaging Simulation of Metal with Bowtie Antenna coupled Bolometer for THz Wave Radiation
Abstract
Air transportation is one of transportation modes with a significant increase in the number of passengers. However, air transportation sometimes is threatened by terrorism act and sabotages, mostly caused by negligence in detecting dangerous metal items. THz wave can be used as imaging because it is safe and has a high spatial resolution. However, THz waves are vulnerable to diffraction. In this paper, diffraction studies and metal imaging simulations of THz waves were carried out using CST Microwave Studio software. The simulation used a bowtie antenna-coupled bolometer as a sensor, due to its simple design and wide bandwidth. Simulations were carried out with various types of antennas with working frequencies of 1 THz, 3 THz, and 5 THz. Variations of plane wave polarization (Ex and Ey polarization) were also performed for each type of antennas. Simulations with increased frequency produce more accurate images because they have smaller diffraction effect and greater spatial resolution. Simulations with Ex polarization produces a better image in contrast because it has a parallel movement of the electric field with the sensor.
References
R. Knipper, A. Brahm, E. Heinz, T. May, G. Notni, H.-G. Meyer, A. Tünnermann, dan J. Popp, “THz Absorption in Fabric and Its Impact on Body Scanning for Security Application,” IEEE Trans. Terahertz Sci. Technol., Vol. 5, No. 6, hal. 999–1004, 2015.
D.H. Auston, “Picosecond Optoelectronic Switching and Gating in Silicon,” Appl. Phys. Lett., Vol. 26, No. 3, hal. 101-103, Feb. 1975.
P.U. Jepsen, R.H. Jacobsen, dan S.R. Keiding, “Generation and Detection of Terahertz Pulses from Biased Semiconductor Antennas,” J. Opt. Soc. Am. B, Vol. 13, No. 11, hal. 2424–2436, Nov. 1996.
M.C. Kemp, P.F. Taday, B.E. Cole, J.A. Cluff, A.J. Fitzgerald, dan W.R. Tribe, “Security Applications of Terahertz Technology,” Terahertz Mil. Secur. Appl., Vol. 5070, hal. 44-52, 2003.
W.R. Tribe, D.A. Newnham, P.F. Taday, dan M.C. Kemp, “Hidden Object Detection: Security Applications of Terahertz Technology,” Proc. SPIE - Int. Soc. Opt. Eng., Vol. 5354, 2004, hal. 168-176.
J.F. Federici, B. Schulkin, F. Huang, D. Gary, R. Barat, F. Oliveira, dan D. Zimdars, “THz Imaging and Sensing for Security Applications - Explosives, Weapons and Drugs,” Semicond. Sci. Technol., Vol. 20, No. 7, hal. S266-S280, 2005.
C.J. Strachan, P.F. Taday, D.A. Newnham, K.C. Gordon, J.A. Zeitler, M. Pepper, dan T. Rades, “Using Terahertz Pulsed Spectroscopy to Quantify Pharmaceutical Polymorphism and Crystallinity,” J. Pharm. Sci., Vol. 94, No. 4, hal. 837–846, Apr. 2005.
D.M. Mittleman, R.H. Jacobsen, dan M.C. Nuss, “T-Ray Imaging,” IEEE Journal of Selected Topics in Quantum Electronics, Vol. 2, No. 3, hal. 679–692, 1996.
A.S. Skryl, J.B. Jackson, M.I. Bakunov, M. Menu, dan G.A. Mourou, “Terahertz Time-domain Imaging of Hidden Defects in Wooden Artworks: Application to a Russian Icon Painting,” Appl. Opt., Vol. 53, No. 6, hal. 1033–1038, Feb. 2014.
E. Pickwell, B.E. Cole, A.J. Fitzgerald, M. Pepper, dan V.P. Wallace, “In Vivo Study of Human Skin Using Pulsed Terahertz Radiation,” Phys. Med. Biol., Vol. 49, No. 9, hal. 1595–1607.
B. Friederich, D. Damyanov, J. Kohl, K. Kolpatzeck, X. Liu, T. Schultze, A. Czylwik, J.C. Balzer, dan I. Willms, “High Resolution Image Processing Technique for the Detection of Metal Entrapments Based on a Terahertz Camera,” Proc. IRMMW-THz, 2019, hal. 1-2.
J.S. Kwon, J.M. Lee, dan W.Y. Kim, “Real-time Detection of Foreign Objects Using X-ray Imaging for Dry Food Manufacturing Line,” Proc. Int. Symhal. Consum. Electron. ISCE, 2008, hal. 17–20.
G. Chattopadhyay, K.B. Cooper, R. Dengler, N. Llombart, dan P.H. Siegel, “Imaging at a Stand-off Distance with Terahertz FMCW Radar,” 2011 30th URSI Gen. Assem. Sci. Symhal, 2011, hal. 1.
C. Baker, T. Lo, W.R. Tribe, B.E. Cole, M.R. Hogbin, dan M.C. Kemp, “Detection of Concealed Explosives at a Distance Using Terahertz Technology,” Proc. IEEE, Vol. 95, No. 8, hal. 1559–1565, 2007.
H.S. Marbun dan C. Apriono, “Antenna Coupled Bolometer Simulation for Terahertz Radiation Detection Diffracted by A Small Metal Object,” dipresentasikan pada 3rd Int. Conf. on Smart City Innovation (ICSCI), Bali, Indonesia, 2020.
T.V. de Guélis, V. Shcherbakov, dan A. Schwarzenböck, “Diffraction Patterns from Opaque Planar Objects Simulated with Maggi-Rubinowicz Method and Angular Spectrum Theory,” Opt. Express, Vol. 27, No. 7, hal. 9372, 2019.
S.B. Tucker, J. Ojeda-Castañeda, dan W.T. Cathey, “Matrix Description of Near-field Diffraction and the Fractional Fourier Transform,” J. Opt. Soc. Am. A, Vol. 16, No. 2, hal. 316, 1999.
J. Kokkoniemi, P. Rintanen, J. Lehtomäki, dan M. Juntti, “Diffraction Effects in Terahertz Band - Measurements and Analysis,” Proc. 2016 IEEE Glob. Commun. Conf. (GLOBECOM), 2016, hal. 1-6.
D. Halliday, R. Resnick, dan J. Walker, Fundamentals of Physics, Hoboken, USA: Wiley, 2005.
A.G. Dmitrenko dan V.V. Fisanov, “Diffraction and Propagation of Electromagnetic Waves in the Presence of Chiral Media,” Russ Phys J, Vol. 41, hal. 780–792, 1998
C. Apriono, A.P. Aji, dan E.T. Rahardjo, “Study of Impedance Matching Effect between Terahertz Bowtie Antenna and Bolometer to Enhance Signals Detection,” Proc. 2019 7th Int. Conf. Smart Comput. Commun. (ICSCC), 2019, hal. 1–4.
A.P. Aji, C. Apriono, dan E.T. Rahardjo, “Surface Current Analysis of THz Bowtie Antenna-coupled Microbolometer,” Proc. 2019 16th Int. Conf. Qual. Res. QIR 2019 - Int. Sym. Electr. Comput. Eng., 2019, hal. 6–9.
A. Oktaviani dan Y. Johan, “Perbandingan Resolusi Spasial, Temporal Dan Radiometrik Serta Kendalanya,” J. Enggano, Vol. 1, No. 2, hal. 74–79, 2016.
© Jurnal Nasional Teknik Elektro dan Teknologi Informasi, under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License.
1.png)
