free-space propagation

free-space propagation

[′frē ‚spās ‚präp·ə′gā·shən]
(electromagnetism)
Propagation of electromagnetic radiation over a straight-line path in a vacuum or ideal atmosphere, sufficiently removed from all objects that affect the wave in any way.
References in periodicals archive ?
This makes it possible to simulate free-space propagation and avoid parasitic reflections,which result in dramatically improved precision when measuring the electromagnetic spectrum below 1GHz.
The module includes an enhanced free-space propagation model, as well as a comprehensive range of capabilities for modeling customer premise equipment (CPE), ensuring optimal transmitter placement, planning capacity and reusing spectrum aggressively.
s)] were consistently different in the near zone but the same in the mid zone, without any indication how the degree of polarization could change during the free-space propagation of light.