HXI's Phase-Locked Receiver operates at a center frequency of 60 GHz, which is the location of the oxygen absorption band where low elevation transmission losses are approximately 16 dB per kilometer. The Receiver can be used along with HXI’s HTX60.0-179 Phase-Locked Transmitter for propagation studies, material characterization, as an analog communications link or even as an FMCW or pulsed radar front end.