Calculated and measured absorption cross sections of lossy objects in reverberation chamber

被引：68

作者：

Carlberg, U ^{[1
]}

Kildal, PS

Wolfgang, A

Sotoudeh, O

Orlenius, C

机构：

[1] Chalmers Univ Technol, Dept Electromagnet, Antenna Grp, S-41296 Gothenburg, Sweden

[2] Univ Karlsruhe, D-76133 Karlsruhe, Germany

[3] Bluetest AB, S-41296 Gothenburg, Sweden

来源：

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY | 2004年 / 46卷 / 02期

关键词：

absorption cross section; forward scattering; reverberation chamber; small antennas;

D O I：

10.1109/TEMC.2004.826878

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Reverberation chambers can be used to measure radiation efficiency of small antennas when these ace located close to lossy objects. The lossy objects represent a heavy loading of the chamber. This loading is characterized by the mean absorption cross section of the lossy objects. This paper describes how this mean absorption cross section can be calculated from the scattered far field of an object by using the forward scattering theorem, or from a more laborious near-field evaluation. Results for lossy spheres and cylinders are calculated by using three different codes, based on spherical mode expansion, finite difference time domain techniques, and moment methods, respectively. The results for the cylinder are compared with measured levels in a reverberation chamber.

引用

页码：146 / 154

页数：9

共 19 条

[1]

CARLBERG U, 2002, IEEE ANTENNAS PROPAG, V2, P470

[2]

*CENELEC EUR COMM, 2001, 50361 EN

[3] APERTURE EXCITATION OF ELECTRICALLY LARGE, LOSSY CAVITIES [J].

HILL, DA ;

MA, MT ;

ONDREJKA, AR ;

RIDDLE, BF ;

CRAWFORD, ML ;

JOHNK, RT .

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, 1994, 36 (03) :169-178

[4] ELECTRONIC-MODE STIRRING FOR REVERBERATION CHAMBERS [J].

HILL, DA .

IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, 1994, 36 (04) :294-299

[5]

Ishimaru A., 1991, Electromagnetic wave propagation, radiation, and scattering

[6]

Kildal P. S., 2000, FDN ANTENNAS UNIFIED

[7] Detection of a polarization imbalance in reverberation chambers and how to remove it by polarization stirring when measuring antenna efficiencies [J].

Kildal, PS ;

Carlsson, C .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2002, 34 (02) :145-149

[8] Definition of effective diversity gain and how to measure it in a reverberation chamber [J].

Kildal, PS ;

Rosengren, K ;

Byun, J ;

Lee, J .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2002, 34 (01) :56-59

[9] Measurement of free-space impedances of small antennas in reverberation chambers [J].

Kildal, PS ;

Carlsson, C ;

Yang, J .

MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 2002, 32 (02) :112-115

[10]

KILDAL PS, 2002, TCP 20 MOBILE PHONES

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