Antenna unit having a wide band

• US 20050062662A1
• Filed: 06/22/2004
• Published: 03/24/2005
• Est. Priority Date: 09/18/2003
• Status: Active Grant

• Current Assignee: Hisamatsu Nakano, Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Original Assignee: Hisamatsu Nakano, Mitsumi Electric Co., Ltd. (MinebeaMitsumi Inc.)
• Inventors: Miyoshi, Akira, Nakano, Hisamatsu
• Granted Patent: US 7,081,859 B2
• Time in Patent Office: Days
• US Class Current: 343/770
• CPC Class Codes: H01Q 1/241 used in mobile communications, e.g. GSM H01Q1/247, H01Q1/248 take precedence
• CPC Class Codes: H01Q 1/422 comprising two or more layers of dielectric material H01Q1/425 takes precedence

Abstract

A UWB antenna has an upper dielectric, a lower dielectric, and a conductive pattern sandwiched therebetween. The conductive pattern has a feeding point at a substantially center portion of a front surface. The conductive pattern has a reversed triangular portion having a right-hand taper part and a left-side taper part which widen from the feeding point at a predetermined angle toward a right-hand side surface and a left-hand side surface, respectively, and a rectangular portion having a base side being in contact with an upper side of the reversed triangular portion. The rectangular portion may preferable have at least one slit formed therein.

Claims

1. An antenna unit comprising:

an upper dielectric;

a lower dielectric; and

a conductive pattern sandwiched between said upper dielectric and said lower dielectric, said conductive pattern having a feeding point at a substantially center portion of a front thereof, said conductive pattern comprising a reversed triangular portion having a right-hand taper part and a left-side taper part which widen from the feeding point at a predetermined angle toward a right-hand side and a left-hand side, respectively, and a rectangular portion having a base side being in contact with an upper side of said reversed triangular portion.

2. The antenna unit as claimed in claim 1, wherein said rectangular portion has at least one slit formed therein.

3. The antenna unit as claimed in claim 2, wherein said rectangular portion has two or more slits.

4. The antenna unit as claimed in claim 1, wherein said predetermined angle lies in a range between 40 degrees and 60 degrees.

5. The antenna unit as claimed in claim 4, wherein said rectangular portion has at least one slit formed therein.

6. The antenna unit as claimed in claim 5, wherein said rectangular portion has two or more slits.

7. An antenna unit comprising:

an upper dielectric;

a lower dielectric; and

a conductive pattern sandwiched between said upper dielectric and said lower dielectric, said conductive pattern having a feeding point at a substantially center portion of a front thereof, said conductive pattern comprising a reversed triangular portion having a right-hand taper part and a left-side taper part which widen from the feeding point at a predetermined angle toward a right-hand side and a left-hand side, respectively, and a semicircular portion having a base side being in contact with an upper side of said reversed triangular portion.

8. The antenna unit as claimed in claim 7, wherein said semicircular portion has at least one slit formed therein.

9. The antenna unit as claimed in claim 8, wherein said semicircular portion has two or more slits.

10. The antenna unit as claimed in claim 7, wherein said predetermined angle lies in a range between 40 degrees and 60 degrees.

11. The antenna unit as claimed in claim 10, wherein said semicircular portion has at least one slit formed therein.

12. The antenna unit as claimed in claim 11, wherein said semicircular portion has two or more slits.