Title:
誘電体装荷アンテナ
Document Type and Number:
Japanese Patent JP4489759
Kind Code:
B2
Abstract:
A dielectrically-loaded loop antenna with a cylindrical dielectric core, a feeder structure passing axially through the core, a sleeve balun encircling one end portion of the core and helical antenna elements extending from a feed connection with the feeder structure at the other end of the core to the rim of the balun. The antenna elements are arranged as a pair of laterally opposed groups of conductive elongate helical elements each having at least first and second conductive elements of different electrical lengths to form a plurality of looped conductive paths. By forming at least one of the conductive elements in each group as a conductive strip with one or both edges meandered, such that the edges of the strip are non-parallel and have different electrical lengths, additional modes of resonance arc created, yielding an improvement in bandwidth.
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Inventors:
Raison, Oliver Paul
Application Number:
JP2006505967A
Publication Date:
June 23, 2010
Filing Date:
March 16, 2004
Export Citation:
Assignee:
Sarantelle Limited
International Classes:
H01Q11/08; H01Q1/38; H01Q5/00; H01Q5/10; H01Q5/371; H01Q7/00
Domestic Patent References:
| JP2003501852A | ||||
| JP9246858A | ||||
| JP10504696A | ||||
| JP5014043A |
Foreign References:
| WO2002023673A1 | ||||
| WO1998024144A1 |
Attorney, Agent or Firm:
Yoshiyuki Kawaguchi
Hidemi Matsukura
Tsutomu Toyama
Hidemi Matsukura
Tsutomu Toyama