Wave transmission lines and networks – Plural channel systems – Having branched circuits
Reexamination Certificate
2002-09-30
2004-08-24
Pascal, Robert (Department: 2817)
Wave transmission lines and networks
Plural channel systems
Having branched circuits
C333S249000, C333S239000
Reexamination Certificate
active
06781477
ABSTRACT:
BACKGROUND
The present invention is directed generally to wireless signal transmission, and, more particularly, to wireless signal transmission in a building heating, ventilation, and air conditioning (HVAC) system.
The use of HVAC ducts as waveguides for the wireless transmission and distribution of electromagnetic signals within buildings is described in U.S. Pat. Nos. 5,994,984 and 5,977,851 to Stancil et al., which are incorporated herein by reference. Wireless transmission in an indoor environment has the advantage that the building in which transmission is taking place does not have to be fitted with wires and cables that are equipped to carry the transmitted signals. Furthermore, the use of HVAC ducts as wireless communication channels eliminates the need for an elaborate system of transmitters, receivers, and antennas typically associated with traditional indoor wireless communication applications.
SUMMARY
In one embodiment, the present invention is directed to a system for transmitting wireless communications within ductwork. The system includes a plurality of transmitter devices for introducing electromagnetic radiation into the ductwork such that the ductwork acts as a waveguide for the electromagnetic radiation, said transmitter devices comprising a transmitter array, wherein the transmitter devices are configured to introduce the electromagnetic radiation using multiple propagation modes. The system also includes a plurality of receiver devices for detecting the electromagnetic radiation within the ductwork, said receiver devices comprising a receiver array.
In one embodiment, the present invention is directed to a system for transmitting wireless communications within ductwork. The system includes means for introducing electromagnetic radiation into the ductwork such that the ductwork acts as a waveguide for the electromagnetic radiation, said means for introducing comprising a transmitter array, wherein the transmitter array is configured to introduce the electromagnetic radiation using multiple propagation modes. The system also includes means for detecting the electromagnetic radiation within the ductwork, said means for detecting comprising a receiver array.
In one embodiment, the present invention is directed to a method for transmitting wireless communications within ductwork. The method includes introducing electromagnetic radiation into the ductwork using a plurality of transmitter devices such that the ductwork acts as a waveguide for the electromagnetic radiation, said transmitter devices comprising a transmitter array, wherein the transmitter array is configured to introduce the electromagnetic radiation using multiple propagation modes. The method also includes detecting the electromagnetic radiation using a plurality of receiver devices within the ductwork, said receiver devices comprising a receiver array.
REFERENCES:
patent: 5977851 (1999-11-01), Stancil et al.
patent: 5994984 (1999-11-01), Stancil et al.
Aronoff, M. “Radial Probe Measurements of Mode Conversion in Large Round Waveguide with TE01Mode Excitation,” p. 301,IRE National Convention Program,Mar. 1951.
King, A.P., “Dominant Wave Transmission Characteristics of a Multimode Round Waveguide,” pp. 966-969,Proceedings of the I.R.E.,Aug. 1952.
Miller, S.E., “Notes on Methods of Transmitting the Circular Electric Wave Around Bends,” pp. 1104-1133,Proceedings of the I.R.E.,Sep. 1952.
Miller, S.E., and Beck, A.C., “Low-Loss Waveguide Transmission,” pp. 348-358,Proceedings of the I.R.E.,Mar. 1953.
Miller, S.E., “Waveguide as a Communication Medium,” pp. 1209-1265,The Bell System Technical Journal,vol. XXXIII, No. 6, Nov. 1954.
Beck, A.C., “Measurement Techniques for Multimode Waveguides,” pp. 35-41,IRE Transactions-Microwave Theory and Techniques,1955.
Forrer, Max P. and Tomiyasu, Kiyo, “Determination of Higher Order Propagating Modes in Wave-Guide Systems,” pp. 1040-1045,Journal of Applied Physics,vol. 29, No. 7, Jul. 1958.
Lewis, D.J., “Mode Couplers and Multimode Measurement Techniques,” pp. 110-115,IRE Transactions on Microwave Theory and TechniquesJan. 1959.
Price, Vernon G., “Measurement of Harmonic Power Generated by Microwave Transmitters,” pp. 116-120,IRE Transactions on Microwave Theory and Techniques,Jan. 1959.
Taub, Jesse J., “A New Technique for Multimode Power Measurement,” pp. 496-505,IRE Transactions on Microwave Theory and Techniques,Nov. 1962.
Levinson, D.S. and Rubinstein, I., “A Technique for Measuring Individual Modes Propagating in Overmoded Waveguide,” pp. 310-322,IEEE Transactions on Microwave Theory and Techniques,vol. MTT-14, No. 7, Jul. 1966.
Lorbeck, J.A. and Vernon R.J., “Determination of Mode Content and Relative Phase in Highly Overmoded Circular Waveguides by Open-End Radiation Pattern Measurement,” pp. 1251-1254,IEEE,vol. 56, No. 6, 1989.
Baird, J.M., Roper, D.H. and Grow, R.W., “Surface Array Waveguide Mode Analyzer,” pp. 137-140,IEEE MTT-S Digest,1992.
Johnston, Ronald H., “Measurement of Modes in an Overmoded Circular Waveguide,” pp. 599-602,IEEE,1997.
Glock, H.-W. and van Rienen, U., “An Iterative Algorithm to Evaluate Multimodal S-Parameter-Measurements,” pp. 1841-1845,IEEE Transactions on Magnetics,vol. 36, No. 4, Jul. 2000.
Carnegie Mellon University
Glenn Kimberly
Kirkpatrick & Lockhart LLP
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