Patent US5245349A successfully refreshed from Google Patents.
US5245349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat-plate patch antenna
Assignee: Harada Industry Co Ltd
•
Filing: 1989-12-22
•
Granted: 1993-09-14
•
Expires: 2009-12-22
Abstract
Abstract A flat-plate patch antenna including a ground plate, a radiating element provided on the ground plate with a feeder cable connected thereto, and a wave guide element provided to face the radiating element with a space in between, the wave guide element being movable parallel to the ground plate.
Inventors
- 👤 Takuji Harada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:07
CPC Classifications
H; H01; H01Q; H01Q19/00; H01Q19/06; H01Q3/00; H01Q3/12; H01Q3/14; H01Q9/00; H01Q9/04; H01Q9/0407
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
109 words
A flat-plate patch antenna comprising: a ground plate; a circular radiating element provided on said ground plate; a sliding plate spaced apart from said radiating element and slideable in a direction parallel to said radiating element, said sliding plate further having a longitudinally extending slit provided therein; and a circular waveguide element facing said radiating element and provided on said sliding plate, said waveguide element having a diameter less than a diameter of said radiating element; and wherein a straight line drawn between the center of said radiating element and a center of said waveguide element is not parallel to a straight line drawn perpendicular to said ground plate.
Claim 2
Dependent Claim
109 words
A flat-plate patch antenna comprising: a ground plate; a circular radiating element provided on said ground plate; a sliding plate spaced apart from said radiating element and slideable in a direction parallel to said radiating element, said sliding plate further having a longitudinally extending slit provided therein; and a circular waveguide element facing said radiating element and provided on said sliding plate, said waveguide element having a diameter less than a diameter of said radiating element; and wherein a straight line drawn between the center of said radiating element and a center of said waveguide element is not parallel to a straight line drawn perpendicular to said ground plate.
Claim 3
Dependent Claim
18 words
A flat-plate patch antenna according to claim 1, further comprising a feeder cable connected to said radiating element.
References Cited (Backward Citations)
US2423150A
Cited
US2509283A
Cited
JPS56160103A
Cited
JPS5781705A
Cited
US4749996A
Cited
US4724443A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-13 | 1997-03-15 | 1997-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-13 | 2001-03-15 | 2001-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-13 | 2005-03-15 | 2005-09-14 | $7700.00 | Window Closed / Lapsed |