Small-size, low-height antenna device capable of easily ensuring predetermined bandwidth

• US 20050057416A1
• Filed: 08/25/2004
• Published: 03/17/2005
• Est. Priority Date: 09/01/2003
• Status: Active Grant

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Yuanzhu, Dou
• Granted Patent: US 7,148,847 B2
• Time in Patent Office: Days
• US Class Current: 343/795
• CPC Class Codes: H01Q 19/005 Patch antenna using one or more coplanar parasitic elements
• CPC Class Codes: H01Q 5/378 Combination of fed elements with parasitic elements
• CPC Class Codes: H01Q 9/0407 Substantially flat resonant element parallel to ground plane, e.g. patch antenna dipole H01Q9/285; monopole H01Q9/40
• CPC Class Codes: H01Q 9/0421 with a shorting wall or a shorting pin at one end of the element H01Q9/0414 takes precedence

Abstract

The antenna device 1 contains a first radiating conductive plate 3 arranged above a grounding conductor 2 so as to be substantially parallel and opposite to the grounding conductor 2; a second radiating conductive plate 4 adjacent to the first radiating conductive plate 3 with a slit 5 interposed therebetween; a feeding conductive plate 6 that extends orthogonally from an outer edge of the first radiating conductive plate 3 adjacent to the slit 5, and a shorting conductive plate 7 that extends orthogonally from an outer edge of the second radiating conductive plate 4 adjacent to the slit 5. A lower end of the feeding conductive plate 6 is connected to a feeding circuit, and a lower end of the shorting conductive plate 7 is connected to the grounding conductor 2.

Claims

1. An antenna device, comprising:

a first radiating conductive unit arranged above a grounding conductor so as to be substantially parallel and opposite to the grounding conductor;

a feeding conductive unit that extends orthogonally from an outer edge of the first radiating conductive unit to be connected to a feeding circuit;

a second radiating conductive unit arranged above the grounding conductor so as to be substantially parallel and opposite to the grounding conductor and adjacent to the first radiating conductive unit with a slit interposed therebetween; and

a shorting conductive unit that extends orthogonally from an outer edge of the second radiating conductive unit to be connected to the grounding conductor,

wherein the shorting conductive unit is disposed in the vicinity of the feeding conductive unit and is electromagnetically coupled with the feeding conductive unit.

2. The antenna device according to claim 1,

wherein the feeding conductive unit extends orthogonally from the outer edge of the first radiating conductive unit adjacent to the slit, and

wherein the shorting conductive unit extends orthogonally from the outer edge of the second radiating conductive unit adjacent to the slit.

3. The antenna device according to claim 1,

wherein the first and second radiating conductive units, the feeding conductive unit, and the shorting conductive unit are composed of a metal plate.

4. The antenna device according to claim 1, further comprising:

a shorting conductive unit for matching impedance,

wherein the shorting conductive unit for matching impedance extends orthogonally from an outer edge of the first radiating conductive unit and is connected to the grounding conductor.

5. The antenna device according to claim 4,

wherein the shorting conductive unit for matching impedance is composed of a metal plate.