Tunable inverted F antenna
First Claim
Patent Images
1. A planar antenna, comprising:
- a ground plane extending in a first direction on a substrate;
a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element;
a feed line coupled to the radiating element, said feed line disposed between the second portion of the radiating element and the ground plane, said coupling defining an impedance tap point of said antenna; and
an impedance adjustment mechanism disposed in the first portion of the radiating element, said impedance adjustment mechanism comprises at least one pair of contacts between the radiating element and the feed line, wherein coupling of the at least one pair of contacts alters the impedance tap point of the antenna.
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Abstract
A planar antenna includes a ground plane on a substrate, a radiating element coupled to the ground plane on the substrate, and a feed line. An impedance tap point is defined by a connection between the feed line and the radiating element and the length of the radiating element defines the resonant frequency of the antenna. A first portion of the radiating element includes an impedance adjustment mechanism for defining the impedance tap point of the antenna and consequently the impedance of the antenna. A second portion of the radiating element includes a frequency adjustment section which adjusts the length of said radiating element and consequently the resonant frequency of the antenna.
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Citations
25 Claims
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1. A planar antenna, comprising:
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a ground plane extending in a first direction on a substrate; a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element; a feed line coupled to the radiating element, said feed line disposed between the second portion of the radiating element and the ground plane, said coupling defining an impedance tap point of said antenna; and an impedance adjustment mechanism disposed in the first portion of the radiating element, said impedance adjustment mechanism comprises at least one pair of contacts between the radiating element and the feed line, wherein coupling of the at least one pair of contacts alters the impedance tap point of the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A planar antenna, comprising:
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a ground plane extending in a first direction on a substrate; a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element, said radiating element having a length that defines a resonant frequency of the antenna; a feed line coupled to the radiating element; and a frequency adjustment section disposed along a length of the radiating element, said frequency adjustment section including at least one pair of contacts separated by a gap, wherein coupling of the at least one pair of contacts defines the length of said radiating element and consequently the resonant frequency of said antenna; and a conductive trace disposed adjacent to the first portion of the radiating element for adjusting an impedance of the planar antenna. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A planar antenna, comprising:
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a ground plane extending in a first direction; a radiating element having a length that defines a resonant frequency of the antenna, said radiating element having a first section extending from the ground plane in a second direction and a second section extending from the first section in a third direction; a feed line coupled to the second section of the radiating element; a first conductive trace disposed adjacent to the second section of the radiating element for adjusting a length of the radiating element and consequently the resonant frequency of the antenna; and a second conductive trace disposed adjacent to the first section of the radiating element for adjusting an impedance of the planar antenna. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A planar inverted-F antenna comprising:
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a ground plane extending in a first direction on a substrate; a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element; a feed line coupled to the radiating element, said feed line disposed between the second portion of the radiating element and the ground plane, said coupling defining an impedance tap point of said antenna; an impedance adjustment mechanism disposed in the first portion of the radiating element and the feed line, said impedance adjustment mechanism comprises at least one pair of contacts between the radiating element and the feed line, wherein coupling of the at least one pair of contacts alters the impedance tap point of the antenna. - View Dependent Claims (21)
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22. A method of adjusting an impedance of a planar inverted F antenna comprising:
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providing a ground plane extending in a first direction on a substrate; providing a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element; providing a feed line coupled to the radiating element, said feed line disposed between the second portion of the radiating element and the ground plane, said coupling defining an impedance tap point of said antenna; providing an impedance adjustment mechanism disposed between said a feed line and said first portion of said radiating element wherein the impedance adjustment mechanism comprises at least one pair of contacts between the radiating element and the feed line; and connecting the at least one pair of contacts to adjust an impedance tap point of the antenna, said impedance tap point defined by connection of said feed line to said radiating element.
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23. A method of adjusting a resonant frequency of a planar inverted F antenna comprising:
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providing a ground plane extending in a first direction on a substrate; providing a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element; providing a feed line coupled to the radiating element, said feed line disposed between the second portion of the radiating element and the ground plane; providing a conductive trace disposed adjacent to the first portion of the radiating element for adjusting an impedance of the planar antenna; providing a frequency adjustment section disposed along a length of a radiating element, said frequency adjustment section including at least one second pair of contacts separated by a gap; and coupling the at least one second pair of contacts to define the length of said radiating element and consequently the resonant frequency of said antenna.
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24. A planar antenna, comprising:
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a ground plane extending in a first direction on a substrate; a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element; a feed line coupled to the radiating element, said coupling defining an impedance tap point of said antenna; an impedance adjustment means disposed in the first portion of the radiating element and the feed line, said impedance adjustment means configured to couple at least one pair of contacts between the feed line and the radiating element to alter the impedance tap point of the antenna.
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25. A planar antenna, comprising:
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a ground plane extending in a first direction on a substrate; a radiating element coupled to the ground plane on the substrate, said radiating element defined by a first portion extending in a substantially perpendicular direction from the ground plane, and a second portion extending in a substantially perpendicular direction from said first portion of the radiating element, said radiating element having a length that defines a resonant frequency of the antenna; a feed line coupled to the radiating element; a frequency adjustment means disposed along a length of the radiating element, said frequency adjustment means configured to couple at least one pair of contacts to define the length of said radiating element and consequently the resonant frequency of said antenna; and a conductive trace disposed adjacent to the first portion of the radiating element for adjusting an impedance of the planar antenna.
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Specification