EP 0992078 A1 20000412 - DIPOLE ANTENNA FOR RADIOTELEPHONES
Title (en)
DIPOLE ANTENNA FOR RADIOTELEPHONES
Title (de)
DIPOLANTENNE FÜR FUNKTELEFONE
Title (fr)
ANTENNE DOUBLET POUR RADIOTELEPHONES
Publication
Application
Priority
- DE 19726570 A 19970623
- EP 9803643 W 19980617
Abstract (en)
[origin: DE19726570C1] The invention relates to an antenna for radiotelephones comprising a flexible cable (5), the length of which is such that the area having the greatest field strength (11) is at least 30 cm away from the radiotelephone (1). The cable of choice is a coaxial cable, the outer conductor (10) of which is a mesh wire which at its distal end (11) is turned up by about a quarter of the wave length and the inner conductor (7) of which protrudes by about a quarter of the wave length from the turned-up end (11) of the outer conductor (10). In this way a dipole antenna is created and the turned-up area (10) of the outer conductor forms a balun. The area of greatest field strength is thus sufficiently far removed from the head of the user, so that the risk of (long-term) damage to cells in the region of the user's head, especially of brain and auditory cells, is significantly reduced.
IPC 1-7
IPC 8 full level
CPC (source: EP)
H01Q 1/243 (2013.01); H01Q 1/245 (2013.01); H01Q 9/30 (2013.01)
Citation (examination)
ROTHAMMEL, KARL: "Antennenbuch", 1991, FRANCKH KOSMOS VERLAG, STUTTGART, 8
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
DE 19726570 C1 19981224; EP 0992078 A1 20000412; WO 9859389 A1 19981230; WO 9859389 A9 19990722
DOCDB simple family (application)
DE 19726570 A 19970623; EP 9803643 W 19980617; EP 98937491 A 19980617