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A novel mode content analysis technique for antennas in multimode waveguides

Authors :
Nikitin, Pavel V.
Stancil, Daniel D.
Cepni, Ahmet G.
Xhafa, Ariton E.
Tonguz, Ozan K.
Brodtkorb, Dagfin
Source :
IEEE Transactions on Microwave Theory and Techniques. Dec, 2003, Vol. 51 Issue 12, p2402, 7 p.
Publication Year :
2003

Abstract

This paper presents a novel technique for analyzing the mode content excited by antennas placed in multimode waveguides. The technique is based on measuring the frequency response between the two antennas coupled into a waveguide and using that information to extract the mode content generated by the transmitting antenna. The technique is applicable to cases in which the mode amplitudes are approximately constant over the frequency range of interest. This method is valuable for determining the mode mix generated by arbitrary transmitting antennas in a multimode waveguide propagation environment. An example of such an environment is heating, ventilation, and air-conditioning (HVAC) ducts used for indoor communications, where an important antenna characteristic is the mode sensitivity (analogous to the antenna directive gain in free space). We validate our technique with the example of a monopole probe antenna coupled into a multimode cylindrical HVAC duct. Index Terms--Antennas, indoor radio communication, microwave measurements, multimode waveguides.

Details

Language :
English
ISSN :
00189480
Volume :
51
Issue :
12
Database :
Gale General OneFile
Journal :
IEEE Transactions on Microwave Theory and Techniques
Publication Type :
Academic Journal
Accession number :
edsgcl.113054338