Abstract
We demonstrate heating, ventilation, and air conditioning (HVAC) ducts as viable and inexpensive high-speed communication links inside of buildings at millimeter (mm-wave) frequencies. HVAC ducts are hollow metal pipes which can be used as waveguides for mm-wave signals. Indoor communication at mm-wave using HVAC ducts outperforms the existing communication methods and the same has been validated through theoretical and extensive experimental results here. Measurement and system calculations show that a received signal strength indicator (RSSI) of -$50\mathrm {d}\mathrm {B}\mathrm {m}$ and data rates in excess of 600 Mbps can be achieved over a distance of up to 8 m using HVAC ducts at 60 GHz.
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