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US 9,431,717 B1Granted
Wideband dual-arm antenna with parasitic element
AssigneeAmazon Technologies, Inc.
InventorsTzung-I Lee, In Chul Hyun, Adrian Napoles
Life of this patent
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Abstract
Antenna structures and methods of operating the same of a wideband dual-arm antenna of an electronic device are described. One wideband antenna includes a first feeding arm coupled to a radio frequency (RF) feed and a second feeding arm coupled to the RF feed. At least a portion of the second feeding arm is parallel to the first feeding arm. The wideband dual-arm antenna further includes a third arm coupled to the ground plane. The third arm is a parasitic ground element that forms a coupling to the first feeding arm and the second feeding arm. The parasitic element increases a bandwidth of the wideband antenna.
Claims20
An electronic device comprising:
- a radio frequency (RF) feed;
- and
- an antenna structure coupled to the RF feed, wherein the antenna structure comprises:
- a ground plane;
- a dual-arm antenna element coupled to the RF feed and coupled to the ground plane, wherein the dual-arm antenna element comprises:
- a first arm coupled to the RF feed, wherein the first arm comprises:
- a first portion that extends in a first direction from the RF feed until a first fold;
- and
- a second portion that extends from the first fold in a second direction;
- and
- a second arm coupled to the RF feed, wherein at least a portion of the second arm is parallel to the first arm, wherein the second arm comprises:
- a line coupled to the RF feed;
- and
- a third portion coupled to the line and extends in the second direction, wherein at least some of the third portion is parallel to the second portion of the first arm;
- and
- a parasitic element coupled to the ground plane and disposed to form a gap between a distal end of the first arm, the distal end being an end of the first arm farthest from the RF feed, wherein a proximity of the parasitic element to the distal end forms a coupling between the parasitic element and the dual-arm antenna element, wherein the first arm contributes to resonance frequencies of a first resonant mode, the parasitic element contributes to resonance frequencies of a second resonant mode and the second arm increases an efficiency of the resonance frequencies of the first resonant mode and second resonant mode to expand a bandwidth of the antenna structure.
13 more elements
An apparatus comprising:
- a radio frequency (RF) feed;
- and
- an antenna structure coupled to the RF feed, wherein the antenna structure comprises:
- a ground plane;
- a first feeding arm coupled to the RF feed, wherein the first feeding arm comprises:
- a first portion that extends in a first direction from the RF feed until a first fold;
- and
- a second portion that extends in a second direction from the first fold;
- a second feeding arm coupled to the RF feed, wherein at least a portion of the second feeding arm is parallel to the first feeding arm, wherein the second feeding arm comprises:
- a line coupled to the RF feed;
- and
- a third portion coupled to the line that extends in the second direction, wherein some of the third portion is parallel to the second portion of the first arm;
- and
- a third arm coupled to the ground plane, wherein the third arm is a parasitic ground element forming a coupling to the first feeding arm and the second feeding arm.
11 more elements
An apparatus comprising:
- a radio frequency (RF) feed;
- and
- an antenna structure coupled to the RF feed, wherein the antenna structure comprises:
- a ground plane;
- a first feeding arm coupled to the RF feed, wherein at least a portion of the first feeding arm extends in a first direction along a first axis from a first point on the first axis towards a distal end of the first feeding arm, the distal end being an end of the first feeding arm farthest from the RF feed;
- a second feeding arm coupled to the RF feed, wherein at least a portion of the second feeding arm extends in the first direction along a second axis from a second point on the second axis towards a distal end of the second feeding arm, the distal end of the second feeding arm being an end of the second feeding arm farthest from the RF feed, and the second axis being is parallel to the first axis;
- and
- a third arm coupled to the ground plane, wherein the third arm is a parasitic ground element forming a coupling to the first feeding arm and the second feeding arm, wherein a portion of the third arm is disposed to form a gap between the distal end of the first feeding arm and a distal end of the third arm in the first axis, the distal end of the third arm being an end of the third arm farthest away from the RF feed.
5 more elements
Dependencies are inferred from the claim text.