DETERMINATION OF DIELECTRIC PERMITTIVITY AND MAGNETIC PERMEABILITY OF MATERIALS BY MEASURING REFLECTION COEFFICIENT WITH ARCH TECHNIQUE
In this study, measurement capabilities of the arch technique on electromagnetic material characterization are presented for 8-12 GHz frequency band. Measurements of reflection coefficient are achieved with respect to polarization and incidence angle of incoming electromagnetic wave by using arch measurement system, which is already installed at MİLTAL. Dielectric permittivity and magnetic permeability of polyethylene are determined by using developed extraction algorithm with the aid of measured amplitude and phase of reflection coefficients. Obtained results will be compared to those obtained by using TRL method in waveguide measurement system. This study will also be a good example for measurement of reflection coefficient with respect to incidence angle. It has been stated that it is feasible to make electromagnetic material characterization measurements of radar absorbing material (RAM), which is used by naval platforms such as aircrafts, missiles, helicopters, etc. and also absorbs electromagnetic waves in a wide frequency band and incidence angle.
 Zivkovic, I, Murk, A., (2012) "Free-Space Transmission Method for the Characterization of Dielectric and Magnetic Materials at Microwave Frequencies" Microwave Materials Characterization, pp. 1–18, Ch. 5, Eds. Costanzo, S., Intech Publications.
 Ghodgaonkar, D. K., Varadan, V. V., Varadan, V. K., (1989) "A Free-Space Method for Measurement of Dielectric Constants and Loss Tangents at Microwave Frequencies”, IEEE Trans. Inst. and Meas., 37-3, 789-793.
 Agilent Technologies, (2012) " Printed Version of Agilent 85070E Dielectric Probe Kit Software’s Help File".
 Agilent Technologies, (2012) " Printed Version of Agilent 85071E Materials Measurement Software’s Help File".
 Dvurechenskaya, N., Zielinski, R.J., (2011) “Advantages and disadvantages of the free-space arch method used for investigation of shielding materials at low gigahertz frequencies” Proceedings of the 10th Int. Symposium on Electomagnetic Compatibility, 790– 795, York, UK.
 Ünal, İ., Türetken, B., (2013) “Radar Soğurucu Malzeme Geliştirilmesinde Elektromanyetik Yöntemler”, Bilgi ve Kazanımın Sürekliliği (BİKAS) Projesi 2013 Yılı Proje Gelişim Raporu, Milimetre Dalga ve Terahertz Teknolojileri Araştırma Laboratuvarları (MİLTAL), Malzeme Enstitüsü, TÜBİTAK MAM, Gebze-Kocaeli.
 Paris, D.T, Hurd, F.K., (1969) "Basic Electromagnetic Theory" Reflection and Refraction of Plane Waves, pp. 346–397, McGraw Hill, New York.
 Wait, J. R., (1996) "Electromagnetic Waves in Stratified Media" Oxford University Press, A.B.D.
 Balanis, C.A., (1989) "Advanced Engineering Electromagnetics" Reflection and Transmission, pp. 220–243, John Wiley & Sons, Kanada.
 Ünal, İ., Canbay, C., (2010) “N-katmanlı, kayıplı, dispersif düzlemsel tabakaların elektriksel özelliklerinin ve kalınlıklarının elektromanyetik yöntemle kestirilmesi” V. URSI Türkiye 2010 Bilimsel Kongresi ve Ulusal Genel Kurul Toplantısı, 1–4, 25-27 Ağustos 2010, ODTU Kuzey Kıbrıs Yerleşkesi.
 Ünal, İ., (2013) “Meme Kanseri Tümörünün Tespit Edilmesi İçin Karşılıklı Kuplaj Etkilerinin Minimize Edildiği Çok Geniş Bandlı (ÇGB) Yeni Bir Mikrodalga Görüntüleme Sistemi” Doktora Tezi, Yeditepe Üniversitesi, İstanbul.
 IEEE Recommended Practice for Radio-Frequency (RF) Absorber Evaluation in the Range of 30 MHz to 5 GHz, IEEE Std. 1128-1998.
The manuscript with title and authors is being submitted for publication in Journal of Aeronautics and Space Technologies. This article or a major portion of it was not published, not accepted and not submitted for publication elsewhere. If accepted for publication, I hereby grant the unlimited and all copyright privileges to Journal of Aeronautics and Space Technologies.
I declare that I am the responsible writer on behalf of all authors.