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Patent EP0226390A2 successfully refreshed from Google Patents.
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EP0226390A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Shorted microstrip antenna

Assignee: Nec Corp ntt Mobile Communications Network
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Filing: 1986-12-03
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Granted: —
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Expires: 2006-12-03
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Abstract

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 (42) which faces a radiating conductive sheet (48) is provided at both ends thereof with a second (44) and a third (46) grounding conductive sheets which are perpendicular to the first grounding conductive sheet, whereby a beam tilt characteristic of the antenna is improved. A passive element (52) and a conductive stub (62) which is provided on the grounding conductive sheet, which faces the radiating conductive element, serve to improve an impedance matching characteristic.

Inventors

  • 👤 Yukio C/O Nec Corporation Yokoyama
  • 👤 Yoshio Ebine
  • 👤 Toshio C/O Anten Kogyo Co. Ltd. Ito

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 17:01
CPC Classifications
H; H01; H01Q; H01Q9/00; H01Q9/04; H01Q9/0407; H01Q9/0421; H01Q5/00; H01Q5/30; H01Q5/378; H01Q9/0414

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 99 words
An microstrip antenna shorted at one side thereof, comprising: a generally rectangular radiating conductive sheet for supplying power to be radiated; a first grounding conductive sheet located to face and parallel to said radiating conductive sheet; a generally rectangular second grounding conductive sheet located at one side of and perpendicular to said first grounding conductive sheet and connected to said radiating conductive sheet; and a third grounding conductive sheet located to face and parallel to said second grounding conductive sheet and provided at one side of and perpendicular to said first grounding conductive sheet which opposes said one side.
Claim 2
Dependent Claim 99 words
An microstrip antenna shorted at one side thereof, comprising: a generally rectangular radiating conductive sheet for supplying power to be radiated; a first grounding conductive sheet located to face and parallel to said radiating conductive sheet; a generally rectangular second grounding conductive sheet located at one side of and perpendicular to said first grounding conductive sheet and connected to said radiating conductive sheet; and a third grounding conductive sheet located to face and parallel to said second grounding conductive sheet and provided at one side of and perpendicular to said first grounding conductive sheet which opposes said one side.
Claim 3
Dependent Claim 33 words
A microstrip antenna as claimed in claim 2, further comprising a second radiating conductive sheet located to face and parallel to said radiating conductive sheet and connected to said second grounding conductive sheet.
Claim 4
Dependent Claim 29 words
A microstrip antenna as claimed in claim 2, further comprising a conductive stub member connected to said first grounding conductive sheet and projecting toward said first radiating conductive sheet.
Claim 5
Dependent Claim 18 words
A microstrip antenna as claimed in claim 3, wherein said conductive stub member has a rectangular parallelepiped configuration.
Claim 6
Dependent Claim 17 words
A microstrip antenna as claimed in claim 3, wherein said conductive stub member has a cylindrical configuration.

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