Folded multilayer electrically small microstrip antenna

Abstract

A folded multilayer electrically small compact microstrip antenna provides an electrically small antenna for the lower frequencies. The folded multilayer electrically small compact microstrip antenna employs a folding radiation strip is divided into segments and is interleaved with a multiple layered microstrip dielectric substrate and a means for a conductive ground plane having a number of conductive branches. A narrow portion of the radiating strip, a coaxial connector, and a first conductive branch are positioned so that a wide portion of the radiating strip provides a given impedance and the narrow portion causes a reduced effective impedance at a junction point. The reduced impedance provide a shortened antenna length that operates at VHF and HF frequencies. The different embodiments of this invention's folded multilayer electrically small compact microstrip antenna include 2, 3 and 5 dielectric layers. This invention also encompasses methods for providing substantial reduction in antenna size at the HF and VHF frequencies with a folded multilayer electrically small compact microstrip antenna by interleaving a folding radiating strip, a multiple layered dielectric substrate and a conductive ground plane means with several conductive branches.