Antenna

• US 20020067316A1
• Filed: 10/26/2001
• Published: 06/06/2002
• Est. Priority Date: 10/27/2000
• Status: Active Grant

• Current Assignee: Fec Co., Ltd., Mitsubishi Materials Corporation
• Original Assignee: Mitsubishi Materials Corporation
• Inventors: Kobayashi, Hideki, Yokoshima, Takao, Chiba, Toshiyuki, Sugimura, Shiro
• Granted Patent: US 6,600,459 B2
• Time in Patent Office: Days
• US Class Current: 343/895
• CPC Class Codes: H01Q 1/22 by structural association with other equipment or articles
• CPC Class Codes: H01Q 1/362 for broadside radiating helical antennas
• CPC Class Codes: H01Q 1/40 Radiating elements coated with or embedded in protective material
• CPC Class Codes: H01Q 5/314 using frequency dependent circuits or components, e.g. trap circuits or capacitors
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H01Q 9/27 Spiral antennas

Abstract

An antenna of a compact size enables to raise the inductance value of the resonance section and produce high gain. The antenna is constructed by connecting resonance sections and in series, in which each antenna element has an inductance section and a capacitance section connected electrically in parallel, and each inductance section has a conductor shaped in a square shape to circle the respective coil axes, and the opening sections formed at respective ends of the coil sections are contained in respective planes that are oriented at an angle to the coil axes.

Claims

1. An antenna comprised by a resonance section having an inductance section and a capacitance section connected electrically in parallel;

wherein

the inductance section has a coil section comprised by a conductor formed in a spiral shape circling a coil axis or an angular shape that can be approximated by a spiral circling the coil axis, and at least one opening section of opening sections formed at both ends of the coil section is contained in a plane oriented at an angle to the coil axis.

2. An antenna according to claim 1, wherein respective portions of the conductor that circle the coil axes are provided parallel to the opening section contained in a plane oriented at an angle to the coil axis.

3. An antenna according to claim 2, wherein the antenna has a plurality of resonance sections, and the resonance sections are connected electrically in series.

4. An antenna according to claim 3, wherein, in at least two adjacent resonance sections, coil axes of the respective coil sections are aligned on a straight line;

and the planes that substantially contain the opening sections of adjacent coil sections are oriented at right angles to each other.