Edge-connected, crossed-electrode array for two-dimensional projection and beamforming

A novel geometry for planar structures which allows simpler implementation and construction while trading off higher signal processing costs and possible reduced performance is introduced. A geometry for array construction which uses two sets of orthogonal striped electrodes is discussed. The basic operation principles of the geometry are given. While obtaining N² intersecting points in a two-dimensional structure, only 2N control points are required. Thus, N² active elements are controlled with 2N degrees of freedom, which simplifies both implementation and data handling. This gain in simplicity is traded off against reduced performance when used as a projector and increased signal processing when used in beamforming if the process is carried out in a two-step process. The limitations of the crossed-electrode geometry and discussed, and a theory for operation as a projector and a receiver is presented