Antenna system including a plurality of meander conductors for a

Details Antenna system including a plurality of meander conductors for a Antenna system including a plurality of meander conductors for a

1994-03-08

1996-09-24

Le, Hoanganh

Communications: radio wave antennas

Antennas

Spiral or helical type

343873, 343872, H01Q 136, H01Q 108

Patent

active

055595243

ABSTRACT:
An antenna of small size is provided which can be mass-produced, which is suitable for use with a portable receiver and which does not require provision of a separate matching circuit. The antenna includes a plurality of meander antennas printed on at least one dielectric film and satisfying respectively different resonance conditions in a frequency band used by the receiver, at least one dielectric solid cylinder for winding the dielectric film therearound, and a dielectric hollow cylinder for covering the dielectric film wound around the dielectric solid cylinder. The individual meander antennas printed on the dielectric film do not make direct electrical contact with each other, and one of the meander antennas connected to a feeder or a helical antenna surrounding the dielectric solid cylinder acts to produce multiple resonance by means of electromagnetic coupling with the other meander antennas, thereby widening the frequency band. The dielectric solid cylinder around which the dielectric film is wound or to which the dielectric film is bonded may be replaced by a dielectric polygonal prism such as a dielectric square prism. In the antenna, impedance matching with the radio frequency part of the receiver can be satisfactorily achieved, so that an antenna of low cost suitable for portable receivers can be offered.

REFERENCES:
patent: 3523251 (1970-08-01), Halstead
patent: 4148030 (1979-04-01), Foldes
patent: 4987424 (1991-01-01), Tamura et al.
patent: 5134422 (1992-07-01), Auriol
patent: 5298910 (1994-03-01), Takei et al.

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