Shorted microstrip antenna with multiple ground planes
AssigneesNEC Corporation, Nippon Telegraph and Telephone Corporation
InventorsYukio Yokoyama, Yoshio Ebine, Toshio Ito
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Abstract
A low and broadband shorted microstrip antenna is disclosed which is mainly applicable to a mobile body in a mobile communication system. A first grounding conductive sheet which faces a radiating conductive sheet is provided at both ends thereof with a second and a third grounding conductive sheets which are perpendicular to the first grounding conductive sheet, whereby a beam tilt characteristic of the antenna is improved. The passive element and a conductive stub are disposed atop the grounding conductive sheet. The passive element and the conductive stub face the radiating conductive element and serve to improve the impedance matching parameter of the microstrip antenna.
Claims11
A shorted microstrip antenna, comprising:
- a generally rectangular radiating conductive sheet for supplying power to be radiated;
- a first grounding conductive sheet spaced from, facing and extending generally parallel to said radiating conductive sheet;
- a second grounding conductive sheet in contact with and extending perpendicularly to said first grounding conductive sheet, said radiating conductive sheet being connected to said second grounding conductive sheet;
- and
- a third grounding conductive sheet in contact with and extending generally perpendicularly to said first grounding conductive sheet, said third grounding conductive sheet being spaced from and extending generally parallel to said second grounding conductive sheet.
Dependencies are inferred from the claim text.