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Propagation model for the HVAC duct as a communication channel

P.V. Nikitin, D.D. Stancil, A.G. Cepni, O.K. Tonguz, A.E. Xhafa, and D. Brodtkorb. Propagation model for the HVAC duct as a communication channel. IEEE Transactions on Antennas and Propagation, 51(5):945– 951, May 2003.

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Abstract

Heating, ventilation, and air conditioning (HVAC) ducts in buildings are typically hollow metal pipes which can be used as waveguides to carry signals and provide network access to offices. Knowledge of channel properties is crucial to designing such a communication system. The paper presents a propagation model for a straight HVAC duct terminated at both ends. At high frequencies, this duct behaves as a multimode waveguide with a transmitting antenna coupling in and a receiving antenna coupling out. We derive a simple analytical expression for the frequency response of this channel using conventional techniques. Experimental data taken on real circular ducts excited by monopole probe antennas confirm the theoretical results. This model represents an initial step toward the development of a tool for planning a wireless distribution system using building HVAC ducts.

@ARTICLE{nikitin_tran-aps_2003,
  author = {P.V. Nikitin and D.D. Stancil and A.G. Cepni and O.K. Tonguz and
	A.E. Xhafa and D. Brodtkorb},
  title = {Propagation model for the HVAC duct as a communication channel},
  journal = {IEEE Transactions on Antennas and Propagation},
  year = {2003},
  volume = {51},
  pages = {945- 951},
  number = {5},
  month = {May},
  abstract = {Heating, ventilation, and air conditioning (HVAC) ducts in buildings
	are typically hollow metal pipes which can be used as waveguides
	to carry signals and provide network access to offices. Knowledge
	of channel properties is crucial to designing such a communication
	system. The paper presents a propagation model for a straight HVAC
	duct terminated at both ends. At high frequencies, this duct behaves
	as a multimode waveguide with a transmitting antenna coupling in
	and a receiving antenna coupling out. We derive a simple analytical
	expression for the frequency response of this channel using conventional
	techniques. Experimental data taken on real circular ducts excited
	by monopole probe antennas confirm the theoretical results. This
	model represents an initial step toward the development of a tool
	for planning a wireless distribution system using building HVAC ducts.},
  owner = {henty},
  pdf = {p.v.nikitin_hvac_ducts_propagation_model_tran_aps_052003.pdf},
  timestamp = {2006.06.25},
}

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