Patent EP0736925A2 successfully refreshed from Google Patents.
EP0736925A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A double-acting antenna and a mobile phone comprising such an antenna
Assignee: Nokia Oyj
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Filing: 1996-03-22
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Granted: —
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Expires: 2016-03-22
Abstract
Abstract The invention relates to a double-acting antenna of a radio communication device, whereby the antenna can be pushed partly inside the cover (4) of the radio communication device and whereby it function as an antenna both in the extracted or active position (Fig.3a) and in the retracted or passive position (Fig.3b). In the passive position that section (2) of the antenna which is pushed inside the cover (4) of the radio communication device functions as a part of the matching circuit (19), which adapts the impedance of the section left outside so that it corresponds to the impedance of the antenna port (11) of the radio communication device. For this purpose the arrangement comprises connecting means (10) to connect one end of the retracted section (2) to the ground potential the electrical length of the retracted section (2) is substantially shorter than a quarter of the used wave-length.
Inventors
- 👤 Risto Huusko
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 15:54
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q1/244
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
214 words
An antenna arrangement for the communication by a radio communication device comprising an antenna port (11) to transfer the antenna signal and a cover (4), and which antenna arrangement comprises: - an antenna, which comprises a first section (1) and a second section (2), whereby the antenna can be moved relative to the cover of the radio communication device between a first extreme position and a second extreme position, whereby said first and second sections in the first extreme position are substantially outside said cover, and whereby said second section in the second extreme position is substantially within said cover, and - a matching part (7) to adapt the impedance of the antenna so that it corresponds to the impedance of said antenna port (11), whereby the matching part comprises an impedance matching circuit (9) between said antenna and said antenna port, characterized in that the electrical length of said second antenna section (2) is substantially shorter than a quarter of the wave-length at which the antenna is intended to be used, and that in the second extreme position the second antenna section forms together with the matching part (7) a connection to adapt the impedance of the first antenna section (1) so that it corresponds to the impedance of said antenna port (11).
Claim 2
Dependent Claim
35 words
An antenna arrangement according to claim 1, characterized in that the electrical length of the second antenna section (2) is substantially one eighth of the wave-length at which the antenna is intended to be used.
Claim 3
Dependent Claim
69 words
An antenna arrangement according to claim 1 or 2, characterized in that said second antenna section (2) comprises a first end and a second end, of which the first end is connected to the said first antenna section (1), and that said matching part (7) comprises means to arrange a connection (10) between said second end and the ground potential when the antenna is in said second extreme position.
Claim 4
Dependent Claim
34 words
An antenna arrangement according to claim 3, characterized in that said second antenna section (2) and said connection (10) form a substantially inductive connection between said first antenna section (1) and the ground potential.
Claim 5
Dependent Claim
30 words
An antenna arrangement according to claim 3 or 4, characterized in that said connection between the second end of the antenna and the ground potential comprises a series inductance (L2).
Claim 6
Dependent Claim
31 words
An antenna arrangement according to claim 3, 4 or 5, characterized in that said connection between the second end of the antenna and the ground potential comprises a series capacitance (C2).
Claim 7
Dependent Claim
26 words
An antenna arrangement according to any of the previous claims, characterized in that said first antenna section (1) is a conductor wound to a cylindrical coil.
Claim 8
Dependent Claim
22 words
An antenna arrangement according to any of the previous claims, characterized in that said second antenna section (2) is a straight conductor.
Claim 9
Dependent Claim
209 words
A mobile phone for communication in a mobile network, the mobile phone comprising a cover, a transceiver antenna port, and an antenna arrangement, whereby the antenna arrangement comprises: - an antenna, which comprises a first section (1) and a second section (2), whereby the antenna can be moved relative said cover of the mobile phone between a first extreme position and a second extreme position, whereby said first and second sections in the first extreme position are substantially outside said cover, and whereby said second section in the second extreme position is substantially within said cover, and - a matching part (7) to adapt the impedance of the antenna so that it corresponds to the impedance of said antenna port, whereby the matching part comprises an impedance matching circuit (9) between said antenna and said antenna port, characterized in that the electrical length of said second antenna section (2) is substantially shorter than a quarter of the wave-length at which the antenna is intended to be used, and that in the second extreme position the second antenna section forms together with the matching part (7) a connection to adapt the impedance of the first antenna section (1) so that it corresponds to the impedance of said antenna port (11).
Claim 10
Dependent Claim
14 words
The use of the antenna arrangement according to claim 1 in a mobile phone.
References Cited (Backward Citations)
No citation records indexed.
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