Title:
HELICAL COMPOSITE ANTENNA STRUCTURE
Document Type and Number:
Japanese Patent JP2002261537
Kind Code:
A
Abstract:
To provide a helical composite antenna that can obtain a stable directional characteristic, can be simplified in structure, and can be reduced in number of parts.
A cylindrical member 1 is formed by integrally molding a hollow center axis 3, four ribs 2, and a resin, for example, with a plastic. The ribs 2 are formed in a cross toward the periphery of the axis 3 and connect the axis 3 to the inner peripheral surface of the member 1. The axis 3 and ribs 2 are formed on one spot of the member 1 near a monopole antenna 4.
Inventors:
NORO JUNICHI
Application Number:
JP2001052378A
Publication Date:
September 13, 2002
Filing Date:
February 27, 2001
Export Citation:
Assignee:
MITSUMI ELECTRIC CO LTD
International Classes:
H01Q21/28; H01Q9/32; H01Q11/08; (IPC1-7): H01Q9/32; H01Q11/08; H01Q21/28
Domestic Patent References:
| JPH11136021A | 1999-05-21 | |||
| JPH0629714A | 1994-02-04 | |||
| JPH0284412U | 1990-06-29 | |||
| JPH11330843A | 1999-11-30 | |||
| JPH10290115A | 1998-10-27 |
Attorney, Agent or Firm:
Yosuke Goto (1 person outside)