US 6,184,833 B2 · Dual strip antenna

Abstract

A dual strip antenna that includes first and second conductive strips, each made from a conductive material. The first and second strips are separated by a dielectric substrate having a predetermined thickness. The first strip is electrically connected to the second strip at one end. A coaxial signal feed is coupled to the dual strip antenna. The dual strip antenna provides an increase in bandwidth over conventional microstrip patch antennas, which is made possible by operating the dual strip antenna as an open-ended parallel plate waveguide having asymmetrical conductor terminations. The operation of the dual strip antenna as an open-ended parallel plate waveguide is achieved by selecting appropriate dimensions for the lengths and widths of the first and second strips. Antenna compactness and a greater variety of useful shapes allow the dual strip antenna to be used as an internal wireless device antenna.

Claims19

Dependent claims

A dual strip antenna, comprising

a first conductive strip having a length selected such that it acts as an active radiator of electromagnetic energy at a first preselected frequency;
and
a second conductive strip being separated along its length from said first strip by a dielectric material having a prescribed thickness and having a length different from the length of said first strip, said length being selected such that said second strip acts as an active radiator of electromagnetic energy at a second preselected frequency slightly offset from the first, said first strip being electrically connected to said second strip at one end, and both operating as an open-end parallel plate waveguide, with asymmetrical conductor terminations.

Dependencies are inferred from the claim text.

Dual strip antenna

Life of this patent

Dual strip antenna

Life of this patent

Abstract

Claims19