Ultra-wideband magnetic antenna
AssigneeTime Domain Corporation
InventorMark Andrew Barnes
Life of this patent
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Abstract
An ultra-wideband magnetic antenna includes a planar conductor having a first and a second slot about an axis. The slots are substantially leaf-shaped having a varying width along the axis. The slots are interconnected along the axis. A cross polarized antenna system is comprised of an ultra-wideband magnetic antenna and an ultra-wideband dipole antenna. The magnetic antenna and the dipole antenna are positioned substantially close to each other and they create a cross polarized field pattern. The present invention provides isolation between a transmitter and a receiver in an ultra-wideband system. Additionally, the present invention allows isolation among radiating elements in an array antenna system.
Claims14
An ultra wide-band magnetic antenna, comprising:
- a planar conductor having a first and a second slot, said first and second slots placed about an axis and being interconnected along said axis, said first and second slots having a width along said axis that varies substantially continuously from a central point to a distal end of each slot;
- and
- a pair of terminals located about said axis,
- wherein, said magnetic antenna transmits electromagnetic waves when energized at said terminals, and wherein, said magnetic antenna generates a signal across said terminals when excited by electromagnetic waves.
A cross polarized antenna system comprising:
- an ultra-wideband magnetic antenna, said magnetic antenna radiating a first E field and a first H field,
- wherein said magnetic antenna comprises
- a planar conductor having a first and a second slot, said first and second slots placed about an axis and being interconnected along said axis, said first and second slots having a width along said axis that varies substantially continuously from a central point to a distal end of each slot, and
- a pair of terminals located about said axis such that said magnetic antenna transmits and receives electromagnetic waves when energized at said terminals and generates a signal across said terminals when excited by electromagnetic waves;
- and
- an ultra-wideband electric antenna, said electric antenna radiating a second E field and a second H field;
- wherein, said magnetic antenna and said electric antenna are positioned substantially close to each other, said first E field and first H field being substantially orthogonal to said second E field and said second H field, thereby creating a cross polarized field pattern.
A cross polarized antenna system comprising:
- an ultra-wideband magnetic antenna, said magnetic antenna radiates a first E field and a first H field,
- wherein said magnetic antenna comprises
- a planar conductor having a first and a second slot, said first and second slots placed about an axis and being interconnected along said axis, said first and second slots having a width along said axis that varies substantially continuously from a central point to a distal end of each slot, and
- a pair of terminals located about said axis such that said magnetic antenna transmits and receives electromagnetic waves when energized at said terminals, and generates a signal across said terminals when excited by electromagnetic waves;
- and
- an ultra-wideband electric antenna, said electric antenna radiates a second E field and a second H field, said electric antenna being spaced from said magnetic antenna and facing said magnetic antenna;
- wherein, said first E field being substantially orthogonal to said second E field and said first H field being substantially orthogonal to said second H field, thereby creating a cross polarized field pattern.
Dependencies are inferred from the claim text.