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EP0588271A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Portable transceiver apparatus with low irradiation of the user, employing an antenna having an asymmetric radiation pattern

Assignee: Alcatel Lucent SAS
•
Filing: 1993-09-11
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Granted: —
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Expires: 2013-09-11
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Abstract

Abstract The present invention relates to a portable transceiver apparatus, in particular a radiomobile telephone set, with low irradiation of the user, comprising a handset and an antenna, having an asymmetric radiation pattern, applied to said handset. Since such apparatuses, when in use, are placed alongside the user's head, a great amount of electromagnetic waves pass through it, in particular with the continuous increase in the transmission frequency and the consequent decrease in the dimension of the antenna the irradiation of the user's head is and will become a serious problem. The aim of the invention is to provide a portable transceiver apparatus so as to minimize the irradiation of its user. By using an antenna having an asymmetric irradiation pattern such as to be extremely limited in the directions of the user's head, a greatly reduced irradiation can be obtained.

Inventors

  • 👤 Claudio Maggio
  • 👤 Luigi Panico

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-09 07:59
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/245

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 47 words
Portable transceiver apparatus, in particular radiomobile telephone set, with low irradiation of the user, including a handset and an antenna applied to said handset, characterized in that said antenna has an asymmetric radiation pattern such as to be extremely limited in the directions of the user's head.
Claim 2
Dependent Claim 15 words
Apparatus according to claim 1, characterized in that said antenna comprises a screened whip antenna.
Claim 3
Dependent Claim 27 words
Apparatus according to claim 1, characterized in that said antenna comprises at least one horizontal dipole radiator disposed at a suitable distance from a horizontal conducting plane.
Claim 4
Dependent Claim 20 words
Apparatus according to claim 3, characterized in that said antenna further comprises at least one reflector placed behind said radiator.
Claim 5
Dependent Claim 14 words
Apparatus according to claim 1, characterized in that said antenna is a rhombic antenna.
Claim 6
Dependent Claim 15 words
Apparatus according to claim 1, characterized in that said antenna is a long single-wire antenna.
Claim 7
Dependent Claim 17 words
Apparatus according to claim 1, characterized in that said antenna is a resonant or terminated V antenna.
Claim 8
Dependent Claim 15 words
Apparatus according to claim 1, characterized in that said antenna comprises variously conformed microstrip structures.
Claim 9
Dependent Claim 15 words
Apparatus according to claim 8, characterized in that said antenna further comprises metallic conducting planes.
Claim 10
Dependent Claim 45 words
Apparatus according to claim 8, characterized in that said antenna is housed on a board that is located inside the apparatus when the latter is not used and can be drawn out by sliding or by turning over when the apparatus is to be used.

References Cited (Backward Citations)

EP0214806A2 Cited
EP0339629A2 Cited

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