Constant Phase

摘要

Various embodiments are described that relate to a loop with a constant phase. The loop can function as an antenna and be used in object detection. A current source can be used to power the loop such that the loop produces a magnetic field and electric field. The magnetic field can be powerful enough to detect a dielectric while the electric field is so small that it does not interfere with nearby communication equipment. Thus, detection can occur without disruption of other important devices.

主权项

1. A system, comprising:
a set of wire sections; and a set of reactive compensation elements, where the set of wire sections and the set of reactive compensation elements are configured to form a loop powered by a current provided by a current source operating at about 1 megahertz or above with a source impedance of about 25 ohms or less, where the individual reactive compensation elements and the individual wire sections of the set of wire sections alternate with one another, where the set of reactive compensation elements function to keep a magnitude and a phase of the current substantially uniform throughout the loop, and where the loop, when powered by the current, produces a magnetic field that is substantially greater than a electric field along a longitudinal axis of loop.