Semi-analytical Modelling of Boundary-tunable Metasurface Antenna for Compressive Sensing

A proof-of-concept semi-analytical demonstration is presented for practically implementable boundary-tunable metasurface antenna. Proposed antenna consists of reverberating planar parallel-plate waveguide with two via layers on the boundary. Different radiation pattern can be generated by electronically switching vias in the inner boundary layer. This arrangement allows to select different measurement modes necessary for interrogating a scene in the computational imaging framework. The advantage of this design is increased beam diversity compared to the passive frequency tuned approach while maintaining a planar configuration. The performance of the antenna is verified by analysing the singular values of the waveguide modes inside the antenna.