Patent ID: 7298255

Claim:
A sensory system for determining the orientation of an object, said sensory system comprising: a plurality of waveguide sensors fixed in position relative to the object, said plurality of waveguide sensors being responsive to received radio frequency signals such that the power of the received signal(s) varies with orientation of the waveguide sensors; CHARACTERIZED IN THAT: the said waveguide sensors are non-uniformly spaced from one another; and the waveguide sensors include: an aperture, for receiving the radio frequency signals, said aperture being formed at an entrance to a waveguide; the waveguide appropriately terminated and opened at the aperture thereby forming a waveguide cavity, said waveguide for receiving electromagnetic energy being propagated from a reference point, wherein electromagnetic energy that enters the waveguide through the aperture is terminated at walls of the waveguide cavity thereby distributing a surface charge density on internal walls of the waveguide; and one or more dipoles, appropriately positioned within the waveguide such that a small signal detected will vary in magnitude with the quantity of electromagnetic energy entering the aperture.