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A novel mode content analysis technique for antennas in multimode waveguides

P.V. Nikitin, D.D. Stancil, A.G. Cepni, A.E. Xhafa, O.K. Tonguz, and D. Brodtkorb. A novel mode content analysis technique for antennas in multimode waveguides. IEEE Transactions on Microwave Theory and Techniques, 51(12):2402– 2408, Dec 2003.

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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.

@ARTICLE{nikitin_tran-mtt_2003,
  author = {P.V. Nikitin and D.D. Stancil and A.G. Cepni and A.E. Xhafa and O.K.
	Tonguz and D. Brodtkorb},
  title = {A novel mode content analysis technique for antennas in multimode
	waveguides},
  journal = {IEEE Transactions on Microwave Theory and Techniques},
  year = {2003},
  volume = {51},
  pages = {2402- 2408},
  number = {12},
  month = {Dec},
  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.},
  owner = {henty},
  pdf = {nikitin_mode_analysis_multimode_waveguides_2003.pdf},
  timestamp = {2006.06.25},
}

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