Lin Frequency Selective Surfaces for Extended Bandwidth Backing Reflector Functions. Sreenivasan Novel Broadband Circularly Polarized Cavity-Backed Aperture Antenna With Traveling Wave Excitation. Ludwig A Simple Ultrawideband Planar Rectangular Printed Antenna With Band Dispensation. De Flaviis A Lumped Circuit for Wideband Impedance Matching of a Non-Resonant, Short Dipole or Monopole Antenna. BirdĪntennas A Dual-Linearly-Polarized MEMS-Reconfigurable Antenna for Narrowband MIMO Communication Systems.