Title:
アンテナ装置
Document Type and Number:
Japanese Patent JP2004516700
Kind Code:
A
Abstract:
An antenna arrangement comprises a folded structure (100) comprising first and second sections (102, 104) defining a transmission line. The sections may be meander-line elements or other physically-shortened electric elements, for example a helical element. Respective feed points (103, 105) are provided at the free ends of the sections (102, 104), thereby enabling independent connections to be made for different modes, such as transmit and receive. Top-loading and additional short-circuit elements may be provided to improve performance and reduce antenna volume. The impedances of the sections (102, 104) may be arranged to differ by adjusting conductor width or by fabricating one of the sections as a plurality of conductors connected in parallel. Discrete components may be included within the antenna structure, to provide enhanced design possibilities, while multi-band operation is enabled by fabrication of additional folded structures within the same volume.
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Inventors:
Boile Kevin Earl
Application Number:
JP2002550353A
Publication Date:
June 03, 2004
Filing Date:
November 29, 2001
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H01Q1/08; H01Q1/24; H01Q1/36; H01Q5/00; H01Q5/10; H01Q5/35; H01Q5/40; H01Q9/36; H01Q9/40; H01Q9/42; H01Q11/04; H01Q11/14; (IPC1-7): H01Q9/42; H01Q1/08; H01Q1/24; H01Q1/36; H01Q5/01; H01Q9/36; H01Q9/40; H01Q11/14
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| JPS5627507A | 1981-03-17 | |||
| JPS56709A | 1981-01-07 | |||
| JP2001510288A | 2001-07-31 | |||
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| US4335385A | 1982-06-15 | |||
| US4381566A | 1983-04-26 | |||
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Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Hiroyoshi Aoki
Akihiko Miyazaki
Hiroyoshi Aoki