ELECTROMAGNETIC CHARACTERIZATION OF AIRCRAFT COMPOSITE MATERIALS AND ITS EFFECTS ON THE ANTENNA PERFORMANCE
Keywords:Aircraft, antenna, composite material and material characterization
This paper presents an electromagnetic characterization of aircraft composite materials, as well as numerical and experimental analyses of its effects on the antenna performance. Two uncalibrated S-parameters characterization methods have been applied for retrieving the complex electrical permittivity in the L- and C-band, namely: Air-region method and Sample-shifted method. Dielectric constants of 4.6 and 1.84 and loss tangent of 2.0x10-2 and 6.1x10-2 have been obtained for fiberglass and honeycomb composite materials, respectively. A 3.0-meters prototype of an Embraer light jet aircraft dorsal fin was fabricated and used in the experiments in a semi-anechoic chamber in order to evaluate the impact of installing aeronautical VHF and L-band antennas on a fuselage made of composite materials.
Materials Characterization, Hoboken, NJ: Wiley, 2004.
 U. C. Hasar, “A new calibration-independent method for complex permittivity extraction of solid dielectric materials,”
IEEE Microw. Wireless Compon. Lett., vol. 18, no. 12, pp. 788-790, Dec. 2008.
 U. C. Hasar and O. Simsek, “A calibration-independent microwave method for position-insensitive and nonsingular
dielectric measurements of solid materials,” J. Phys. D: Appl. Phys., vol. 42, no. 7, Mar. 2009.
 A. M. Nicolson and G. F. Ross, “Measurement of the intrinsic properties of materials by time-domain techniques,”
IEEE Trans. Instrum. Meas., vol. 19, no. 4, pp. 377-382, Nov. 1970.
 W. B. Weir, “Automatic measurement of complex dielectric constant and permeability at microwave frequencies,”
Proc. IEEE, vol. 62, no. 1, pp. 33-36, Jan. 1974.
 J. Baker-Jarvis, “Transmission/reflection and short-circuit line permittivity measurements,” NIST, Boulder, CO, Tech.
Note 1341, Jul. 1990.
 A. H. Boughriet, C. Legrand, and A. Chapoton, “A noniterative stable transmission/reflection method for low-loss
material complex permittivity determination,” IEEE Trans. Microw. Theory Tech., vol. 45, no. 1, pp. 52–57, Jan. 1997.
 J. Baker-Jarvis, E. J. Vanzura, and W. A. Kissick, “Improved technique for determining complex permittivity with the
transmission reflection method,” IEEE Trans. Microw. Theory Techn., vol. 38, no. 8, pp. 1096-1103, Aug. 1990.
 K. Chalapat, K. Sarvala, J. Li, and G. S. Paraoanu, “Wideband reference plane invariant method for measuring
electromagnetic parameters of materials,” IEEE Trans. Microw. Theory Tech., vol. 57, no. 9, pp. 2257–2267, Aug.
 U. C. Hasar and O. E. Inan, “A position-invariant calibration-independent method for permittivity measurements,”
Microw. Opt. Technol. Lett., vol. 51, no. 6, pp. 1406-1408, Jun. 2009.
 C. Wan, B. Nauwelaers, W. De Raedt, and M. Van Rossum, “Two new measurement methods for explict determination
of complex permittivity,” IEEE Trans. Microw. Theory Tech., vol. 46, no. 11, pp. 1614–1619, Nov. 1998.
 M. D. Janezic, “Complex permittivity determination from propagation constant measurements,” IEEE Microw. Guided
Wave Lett., vol. 9, no. 2, pp. 76-78, Feb. 1999.
 C. Wan , B. Nauwelaers , W. De Raedt and M. Van Rossum, “Complex permittivity measurement method based on
asymmetry of reciprocal two-ports”, Electron. Lett., vol. 32, no. 16, pp. 1497-1498, Aug. 1996.
 G. B. Arfken and H. J. Weber, Mathematical methods for physicists, Burlington, MA: Elsevier, 2005.
 W. H. Press, S. A. Teukolsky, W. T. Vetterling, and B. P. Flannery, Numerical recipes in C: The art of scientific
computing, Cambridge: Cambridge university press, 1992.
 F. C. Smith, "Effective permittivity of dielectric honeycombs ", Proc. Inst. Elect. Eng., Microw., Antennas, Propagat.,
vol. 146, no. 1, pp. 55-59, 1999.
 C. You, M. M. Tentzeris, and W. Hwang, "Multilayer Effects on Microstrip Antennas for Their Integration With
Mechanical Structures", IEEE Trans. Antennas Propag., vol. 55, no. 4, pp. 1051-1058, Apr. 2007.
 Sensor Systems Inc. S65-5366-L series, Available in: <http://www.sensorantennas.com/product/l-band-antenna-9/>.
Access at: October 12, 2016.