Multilayered helical antenna for mobile telecommunication units

Details Multilayered helical antenna for mobile telecommunication units Multilayered helical antenna for mobile telecommunication units

1999-09-22

2000-12-19

Ho, Tan

Communications: radio wave antennas

Antennas

Spiral or helical type

343702, 343774, H01Q 136

Patent

active

061633070

ABSTRACT:
A multilayered helical antenna for mobile communication units includes a first dielectric sheet, a plurality of second dielectric sheets, a plurality of second and third dielectric sheets. All of the second dielectric sheets, except one, have a starting hole and an ending hole, with the exception having the starting hole only. Each of the second dielectric sheet is provided with a partially opened circular metallic pattern. Each of the third dielectric sheets has a via hole. Each of the dielectric sheets has a through-hole at a center thereof in order to allow a whip antenna to be slid upward and downward along a center axis of a helical antenna which is formed by stacking the dielectric sheets in a predetermined order. The via holes are filled with the same conducting material as the partially opened circular metallic patterns to thereby vertically connect the partially opened circular metallic patterns on the second dielectric sheets through the corresponding starting holes and ending holes, thereby forming a spiral capable of transmitting and receiving horizontal and vertical polarizations.

REFERENCES:
patent: 5798737 (2000-05-01), Kanaba et al.
patent: 5861852 (1999-01-01), Asakura et al.
patent: 5933116 (1999-08-01), Suesada et al.
patent: 5977927 (1999-11-01), Mandai et al.
patent: 6028568 (2000-02-01), Asakuru et al.
patent: 6031496 (2000-02-01), Kuittinen et al.
patent: 6069592 (2000-05-01), Kanaba et al.

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