Dual band patch antenna
AssigneeKoninklijke Philips Electronics N.V.
InventorKevin R. Boyle
Life of this patent
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Abstract
A dual band patch antenna (700) comprises a conventional patch conductor (106) having a resonant circuit (702, 704) connected between the patch conductor and a ground conductor (102). The resonant circuit (702, 704) modifies the behavior of the antenna (700) in the vicinity of its resonant frequency, thereby providing a dual band antenna in which both bands can be used simultaneously. The total radiating bandwidth of the dual band antenna is significantly greater than that of an equivalent antenna having no resonant circuits. Additional resonant circuits can be employed to provide a multi-band antenna.
Claims11
A dual band patch antenna, comprising:
- a patch conductor;
- a ground conductor having a hole;
- a conducting spacer for providing a space between said patch conductor and said ground conductor;
- and
- a mandrel including
- an inductive portion located within the space between said patch conductor and said ground conductor, and
- a capacitive portion located within said hole of said ground conductor.
A dual band patch antenna, comprising:
- a patch conductor layer;
- a ground conductor layer overlying said patch conductor layer, said ground conductor layer having a hole;
- and
- a resonant circuit including
- a first set of one or more layers forming an inductor located between said patch conductor layer and said ground conductor layer, and
- a second set of one or more layers forming a capacitor located within said hole of said ground conductor layer.
A dual band patch antenna, comprising:
- a patch conductor;
- a ground conductor;
- and
- a first resonant circuit connected to said patch conductor and unconnected to said ground conductor,
- wherein said ground conductor has a hole, and
- wherein said first resonant circuit includes a mandrel having a capacitive portion located within said hole.
Dependencies are inferred from the claim text.