Antenna and dielectric substrate for antenna

• US 7,098,856 B2
• Filed: 09/04/2003
• Issued: 08/29/2006
• Est. Priority Date: 11/27/2002
• Status: Expired due to Fees

• Current Assignee: Taiyo Yuden Company Limited (Taiyo Yuden Co)
• Original Assignee: Taiyo Yuden Company Limited (Taiyo Yuden Co)
• Inventors: Okado, Hironori
• Primary Examiner(s): Chen, Shih-Chao
• Assistant Examiner(s): A, MINH D
• Application Number:
  US10/654,432
• Publication Number:
  US 20040100406A1
• Time in Patent Office: 1,090 Days
• Field of Search: 343/700.MS, 343/767, 343/702, 343/770, 343/806, 343/895, 343/795, 343/865
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 9/40 Element having extended radiating surface

Abstract

An antenna comprises a ground pattern, and a planar element that is fed and equipped with a cut-out portion provided from the farthest edge portion formed from the feed position toward the ground pattern side, and the ground pattern and the planar element are juxtaposed with each other. The cut-out portion enables to further miniaturize the antenna and secure current paths to obtain radiation in a low-frequency range. Since the ground pattern and the planar element are juxtaposed with each other, the mount volume of the antenna can be reduced, and the antenna characteristic, particularly the impedance characteristic, can be easily controlled, and the bandwidth can be widened.

Claims

1. An antenna, comprising:

a ground pattern; and

a planar element that is conductive and includes (i) an edge portion positioned away from the ground pattern, (ii) a feed point and (iii) a cut-out portion formed at the edge portion,

wherein said ground pattern and said planar element are juxtaposed with each other extending along opposite directions respectively, and

said planar element has such a shape that a bottom side thereof is adjacent to the ground pattern, lateral sides thereof are provided vertically or substantially vertically to said bottom side and said cut-out portion is provided in a top side thereof.

2. The antenna as set forth in claim 1, wherein both corners of said bottom side are splayed.

3. An antenna dielectric substrate, comprising:

a layer formed of a dielectric material; and

a layer containing a conductor having a cut-out portion formed from an edge portion nearest to a first side surface of said antenna dielectric substrate toward a second side surface opposite to said first side surface,

wherein said conductor has such a shape that a side thereof nearest to said second side surface is a bottom side, lateral sides thereof are provided vertically or substantially vertically to said bottom side and said cut-out portion is provided in a top side nearest to said first side surface.

4. The antenna dielectric substrate as set forth in claim 3, wherein both corners of said bottom side are splayed.