Reconfigurable multi-band antenna with four to ten ports
First Claim
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1. A reconfigurable antenna device comprising:
- a substrate incorporating a first groundplane, a two-arm antenna having first and second arms each having a proximal portion and a distal portion, the proximal portions extending in substantially opposite directions and the distal portions being substantially parallel to each other, a first unbalanced antenna extending across a space between the distal portions and adjacent to the proximal portions of the first and second arms, a second unbalanced antenna located generally adjacent to the first arm and a third unbalanced antenna located generally adjacent to the second arm, the second and third unbalanced antennas respectively extending towards the distal portions of the first and second arms and located between the distal portions,wherein a region at one end of the substrate where the antennas are mounted is free of the first groundplane, the groundplane having an edge facing the end of the substrate where the antennas are mounted,wherein the respective antennas and the first groundplane are substantially coplanar or disposed in two or more substantially parallel planes,wherein each of the two-arm antenna and the first, second and third unbalanced antennas is provided with a respective matching circuit and at least one signal port,wherein the two-arm antenna and the first unbalanced antenna are provided with feedlines located substantially centrally between the distal portions of the first and second arms, andwherein at least the first, second and third unbalanced antennas have feedpoints at a portion of said edge of said first groundplane that is substantially central between the distal portions of the first and second arms.
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Abstract
There is disclosed a reconfigurable antenna device having a substrate incorporating a first groundplane, a two-arm antenna having first and second arms each having a proximal portion and a distal portion, a first unbalanced antenna located generally between the distal portions and adjacent to the proximal portions of the first and second arms, a second unbalanced antenna located generally adjacent to the first arm and a third unbalanced antenna located generally adjacent to the second arm. The antenna device may be configured with four or five feed points, and may drive from four up to ten signal ports.
52 Citations
36 Claims
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1. A reconfigurable antenna device comprising:
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a substrate incorporating a first groundplane, a two-arm antenna having first and second arms each having a proximal portion and a distal portion, the proximal portions extending in substantially opposite directions and the distal portions being substantially parallel to each other, a first unbalanced antenna extending across a space between the distal portions and adjacent to the proximal portions of the first and second arms, a second unbalanced antenna located generally adjacent to the first arm and a third unbalanced antenna located generally adjacent to the second arm, the second and third unbalanced antennas respectively extending towards the distal portions of the first and second arms and located between the distal portions, wherein a region at one end of the substrate where the antennas are mounted is free of the first groundplane, the groundplane having an edge facing the end of the substrate where the antennas are mounted, wherein the respective antennas and the first groundplane are substantially coplanar or disposed in two or more substantially parallel planes, wherein each of the two-arm antenna and the first, second and third unbalanced antennas is provided with a respective matching circuit and at least one signal port, wherein the two-arm antenna and the first unbalanced antenna are provided with feedlines located substantially centrally between the distal portions of the first and second arms, and wherein at least the first, second and third unbalanced antennas have feedpoints at a portion of said edge of said first groundplane that is substantially central between the distal portions of the first and second arms. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A reconfigurable antenna device comprising a substrate incorporating a first groundplane, a two-arm antenna having first and second opposed arms each having a proximal portion and a distal portion, the proximal portions extending in substantially opposite directions and the distal portions being substantially parallel to each other, a first unbalanced antenna extending across a space between the distal portions and adjacent to the proximal portions of the first and second arms, a second unbalanced antenna located adjacent to the first arm and a third unbalanced antenna located adjacent to the second arm, the second and third unbalanced antennas respectively extending towards the distal portions of the first and second arms and located between the distal portions, and the second and third unbalanced antennas being located in a plane that is substantially coplanar with or parallel to the substrate,
wherein the second and third unbalanced antennas have respective distal ends that overlap but do not touch the respective distal portions of the first and second arms of the two-arm antenna, wherein the first and second opposed arms are both connected to at least one first signal port, the first unbalanced antenna is connected to at least one second signal port, the second unbalanced antenna is connected to at least one third signal port and the third unbalanced antenna is connected to at least one fourth signal port, wherein the second and third unbalanced antennas and consequently the third and fourth signal ports are configured to operate at substantially the same given frequency band or bands as each other, wherein the second unbalanced antenna and the distal portion of the first arm, during operation, electromagnetically couple with each other so as to act as a bandstop filter to reduce propagation of RF signals to the third unbalanced antenna from the second unbalanced antenna, thereby to reduce coupling between the third and fourth signal ports at the given frequency band or bands, and wherein the third unbalanced antenna and the distal portion of the second arm, during operation, electromagnetically couple with each other so as to act as a bandstop filter to reduce propagation of RF signals to the second unbalanced antenna from the third unbalanced antenna, thereby to reduce coupling between the fourth and third signal ports at the given frequency band or bands.
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36. A reconfigurable antenna device comprising a substrate incorporating a first groundplane, a two-arm antenna having first and second opposed arms each having a proximal portion and a distal portion, the proximal portions extending in substantially opposite directions and the distal portions being substantially parallel to each other, a first unbalanced antenna extending across a space between the distal portions and adjacent to the proximal portions of the first and second arms, a second unbalanced antenna located adjacent to the first arm and a third unbalanced antenna located adjacent to the second arm, the second and third unbalanced antennas respectively extending towards the distal portions of the first and second arms and located between the distal portions, and the second and third unbalanced antennas being located in a plane that is substantially coplanar with or parallel to the substrate, wherein the second and third unbalanced antennas have respective distal ends that are located adjacent to but do not touch the respective distal portions of the first and second arms of the two-arm antenna,
wherein the first and second opposed arms are both connected to at least one first signal port, the first unbalanced antenna is connected to at least one second signal port, the second unbalanced antenna is connected to at least one third signal port and the third unbalanced antenna is connected to at least one fourth signal port, wherein the second and third unbalanced antennas and consequently the third and fourth signal ports are configured to operate at substantially the same given frequency band or bands as each other, and wherein a first resonant circuit configured to resonate in a first frequency band is located on the first unbalanced antenna between the first and second arms of the two-arm antenna; - thereby to reduce coupling between the third and fourth signal ports in the first frequency band.
Specification