H - Electricity – 01 – Q
Patent
H - Electricity
01
Q
351/31
H01Q 1/38 (2006.01) H01Q 13/10 (2006.01) H01Q 21/20 (2006.01) H01Q 21/24 (2006.01)
Patent
CA 1231439
ABSTRACT OF DISCLOSURE ANTENNA An antenna suitable for the generation of circularly polarised annular radiation pattern comprising a substrate spaced apart from a ground plane by a layer of dielectric material, the substrate being arranged to carry on one side thereof a conductive layer in which a plurality of radial slots is defined equiangularly disposed to extend outwardly from a central region of the substrate and on the other side thereof a microstrip feed line arrangement via which the radial slots are arranged to be fed with microwave energy for the generation of a horizontally polarised radiation pattern and via which an edge slot defined between the peripheral edge of the layer and the ground plane is arranged to be fed with microwave energy for the generation of a vertically polarised radiation pattern whereby the horizontal pattern and the vertical pattern in combination afford the circularly polarised annular radiation pattern.
471552
Borden Ladner Gervais Llp
Plessey Overseas Limited
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