[1] Xu Hongfei, Xu Lina, Gu Ning, et al. A new electromagnetic functional materialcomposed of metallic hollow micro-spheres [J]. Journal of Southeast University (English Edition), 2003, 19 (1): 8-11. [doi:10.3969/j.issn.1003-7985.2003.01.003]

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A new electromagnetic functional materialcomposed of metallic hollow micro-spheres()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

19

Issue:

2003 1

Page:

8-11

Research Field:

Electromagnetic Field and Microwave Technology

Publishing date:

2003-03-30

Info

Title:

A new electromagnetic functional materialcomposed of metallic hollow micro-spheres

Author(s):

Xu Hongfei¹;  2;  Xu Lina²;  Gu Ning²;  Sun Zhongliang¹

¹State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210096, China
²Key Laboratory of Molecular and Bio-molecular Electronics of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

electromagnetic functional material;  microwave absorbing;  electron-less deposition

PACS:

TN804

DOI:

10.3969/j.issn.1003-7985.2003.01.003

Abstract:

This paper presents a new electromagnetic functional material developed by electron-less nickel deposition technique, with a single hollow micro-sphere as the core template and a thin nickel layer as the shell. The micrograph taken by a scanning electron microscope shows the microstructures of the materials in detail. Scattering parameters of the waveguide sample holder filled with the materials have been obtained over X band. The electromagnetic parameters computed from the measured S parameters show that the material with metallic hollow spheres has as high relative permeability μ′_r as 19.0 with about 0.6 magnetic loss tangent over the whole bandwidth. Compared to the material with non-metallic spheres, the permeability μ′_r and the magnetic loss tangent μ″_r increase greatly, while the permittivity remains lower than 1.8.

References:

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[5] Xu Lina, Zhou Kaichang, Xu Hongfei, et al. Copper thin coating deposition on natural pollen particles[J]. Applied Surface Science, 2001, 183(1/2):58-61.
[6] Juan Munoz, Marta Rojo, Alfredo Parreno, et al. Automatic measurement of permittivity and permeability at microwave frequencies using normal and oblique free-wave incidence with focused beam [J]. IEEE Trans IM, 1998, 47(4):886-892.
[7] Collin R E. Field theory of guided waves, 2nd Ed.[M]. New York: McGraw-Hill, 1991.349-351.
[8] Zhang Keqian. Electromagnetic theory for microwaves and opt electronics[M]. Beijing: Publishing House of Electronics Industry, 2001. 197-253.(in Chinese)
[9] Nicolson A M, Ross G F. Measurement of the intrinsic properties of materials by time-domain techniques[J]. IEEE Trans IM, 1970, 19(4): 77-382.

Memo

Memo:

Biographies: Xu Hongfei(1966—), male, senior engineer, graduate, xuhongfei@seu.edu.cn; Gu Ning, male, professor, guning@seu.edu.cn.

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