Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2006-04-18
2006-04-18
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S795000
Reexamination Certificate
active
07030827
ABSTRACT:
The present invention relates to a planar antenna (1) for excitation of the TE01-mode of an electromagnetic wave and adapted to be arranged in a waveguide tube (2). The planar antenna comprises a substrate (6) of dielectric material having a first surface (7) intended to face towards a filling good surface and a second surface (8) facing in an opposite direction. A first group (9) of a plurality of dipole arms (10) is arranged on the first surface (7) or the second surface (8) on a perimeter of a circle with a predetermined radius. A second group (11) of a plurality of dipole arms (12) is arranged on the first surface (7) or the second surface (8) on the perimeter of the circle with the predetermined radius. The dipole arms (10) of the first group (9) extend in a first direction and the dipole arms (12) of the second group (11) extend in a direction opposite the first direction. Furthermore, the present invention relates to an antenna system comprising a cylindrical waveguide tube (2) having a bottom plate (3) and a tube portion (4) and a planar antenna (1) as mentioned above.
REFERENCES:
patent: 3348228 (1967-10-01), Melancon
patent: 3611398 (1971-10-01), Schnetzer
patent: 6266022 (2001-07-01), Müller et al.
patent: 19800306 (1999-07-01), None
patent: 0935127 (1999-08-01), None
patent: WO-02/31450 (2002-04-01), None
“International Search Report relating to PCT/EP 03/05118”, (Aug. 8, 2003), 2 Pages.
Landstorfer Friedrich
Mahler Wolfgang
Motzer Jürgen
Le Hoang-anh
Schwegman Lundberg Woessner & Kluth P.A.
VEGA Grieshaber KG
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