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.
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.