Antenna assemblies
Exemplary embodiments are disclosed of antenna assemblies configured for reception of television signals, such as high definition television (HDTV) signals. In an exemplary embodiment, an antenna assembly generally includes a VHF antenna element and a UHF antenna element. The VHF antenna element and the UHF antenna element may be parasitically coupled without a direct ohmic connection between the VHF antenna element and the UHF antenna element. The antenna assembly may be configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun.
1. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein the VHF antenna element comprises a middle portion and first and second extensions extending outwardly from the middle portion;
wherein the middle portion of the VHF antenna element has a curvature substantially matching a curvature of a curved portion of the UHF antenna element that overlaps and/or is alongside the middle portion of the VHF antenna element; and
wherein the UHF antenna element comprises at least one tapered loop antenna element having the curved portion that overlaps and/or is alongside the middle portion of the VHF antenna element.
2. The antenna assembly of claim 1 , wherein:
the middle portion comprises a U-shaped portion having first and second ends; and
the first and second extensions of the VHF antenna element extend in opposite directions from the respective first and second ends of the U-shaped portion.
3. The antenna assembly of claim 2 , wherein:
the VHF antenna element comprises a VHF dipole including the middle portion and the first and second extensions; and
the antenna assembly does not include a diplexer and a VHF balun.
4. The antenna assembly of claim 2 , wherein the VHF antenna element comprises a rod including:
the U-shaped portion having the curvature substantially matching the curved portion of the tapered loop antenna element that overlaps and/or is alongside the U-shaped portion; and
the first and second extensions of the VHF antenna element extend linearly in opposite directions from the respective first and second ends of the U-shaped portion.
5. The antenna assembly of claim 4 , wherein:
the antenna assembly further comprises a housing in which the UHF antenna element is housed;
the U-shaped portion of the rod is disposed around a portion of the housing adjacent a feed region; and
one or more portions of the rod are disposed within one or more holders along the housing.
6. The antenna assembly of claim 2 , wherein the VHF antenna element comprises a planar element including:
the U-shaped portion having the curvature substantially matching the curved portion of the tapered loop antenna element that overlaps and/or is alongside the U-shaped portion;
the first and second extensions that extend outwardly in opposite directions from the respective first and second ends of the U-shaped portion, the first and second extensions being flared, triangular, and/or rounded.
7. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein:
the VHF antenna element comprises a curved portion having first and second ends, and first and second extensions extending in opposite directions from the respective first and second ends of the curved portion;
the UHF antenna element comprises a tapered loop antenna element having a curved portion that overlaps and/or is alongside the curved portion of the VHF antenna element; and
the curved portion of the VHF antenna element has a curvature that substantially matches a curvature of the curved portion of the tapered loop antenna element.
8. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein:
the UHF antenna element comprises first and second tapered loop antenna elements defining a generally figure eight configuration;
the VHF antenna element comprises:
a curved portion including first and second ends and having a curvature that substantially matches a curvature of a curved portion of the first tapered loop antenna element; and
first and second extensions extending in opposite directions from the respective first and second ends of the curved portion of the VHF antenna element.
9. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein:
the UHF antenna element comprises upper and lower tapered loop antenna elements;
the VHF antenna element comprises:
an upper curved portion including first and second ends and having a curvature that substantially matches a curvature of a lower curved portion of the upper tapered loop antenna element;
first and second extensions extending in opposite directions from the respective first and second ends of the upper curved portion of the VHF antenna element;
a lower curved portion including third and fourth ends and having a curvature that substantially matches a curvature of an upper curved portion of the lower tapered loop antenna element; and
third and fourth extensions extending in opposite directions from the respective third and fourth ends of the lower curved portion of the VHF antenna element.
10. The antenna assembly of claim 9 , wherein:
the upper and lower tapered loop antenna elements defining a generally figure eight configuration; and/or
the upper and lower curved portions of the VHF antenna element have opposite upwardly facing and downwardly facing U-shaped and/or concave curvatures.
11. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein:
the UHF antenna element comprises an array of tapered loop antenna elements including first and second tapered loop antenna elements defining a first generally figure eight configuration and third and fourth tapered loop antenna elements defining a second generally figure eight configuration;
the VHF antenna element comprises:
a first VHF antenna element including a first curved portion having first and second ends and a curvature that substantially matches a curvature of a curved portion of the first tapered loop antenna element, the first VHF antenna element further including first and second extensions extending in opposite directions from the respective first and second ends of the first curved portion of the first VHF antenna element; and
a second VHF antenna element including a second curved portion having third and fourth ends and a curvature that substantially matches a curvature of a curved portion of the fourth tapered loop antenna element, the second VHF antenna element further including third and fourth extensions extending in opposite directions from the respective third and fourth ends of the second curved portion of the second VHF antenna element.
12. The antenna assembly of claim 11 , wherein:
the first and second curved portions of the respective first and second VHF antenna elements have opposite upwardly facing and downwardly facing U-shaped and/or concave curvatures; and/or
the antenna assembly further comprises:
a first reflector behind the first and second tapered loop antenna elements and the first VHF antenna element; and
a second reflector behind the third and fourth tapered loop antenna elements and the second VHF antenna element.
13. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein:
the UHF antenna element includes at least two antenna elements each having a generally annular shape with an opening;
each of the at least two antenna elements includes generally circular inner and outer perimeter portions such that the antenna element's annular shape and opening are generally circular;
the antenna assembly further comprises a printed circuit board having fastener holes;
each of the at least two antenna elements includes fastener holes; and
the printed circuit board is attached to the at least two antenna elements by mechanical fasteners inserted through the fastener holes of the printed circuit board that are aligned with the fastener holes of the at least two antenna elements.
14. An antenna assembly comprising:
a plurality of antenna elements including:
a UHF antenna element;
a VHF antenna element;
wherein the UHF antenna element and the VHF antenna element are parasitically coupled without a direct ohmic connection between the UHF antenna element and the VHF antenna element;
wherein the antenna assembly is configured to be operable for receiving VHF and UHF high definition television signals without using a diplexer and a VHF balun;
wherein a plane including the VHF antenna element is spaced apart from and separated in the z-direction from a plane including the UHF antenna element by a distance within a range from about 15 millimeters to about 45 millimeters, such that the VHF antenna element is not coplanar with the UHF antenna element; and/or wherein:
the VHF antenna element is configured to be operable for receiving VHF high definition television signals from about 174 megahertz to about 216 megahertz;
the UHF antenna element is configured for receiving UHF high definition television signals from about 470 megahertz to about 698 megahertz; and
the antenna assembly is configured for receiving high definition television signals and communicating the received high definition television signals to a television.
15. The antenna assembly of claim 14 , wherein:
the antenna assembly includes a single feed point on the UHF antenna element; and/or
the antenna assembly includes a 75:300 ohm broadband balun.
16. The antenna assembly of claim 14 , wherein:
the antenna assembly further comprises at least one reflector behind the UHF antenna element and the VHF antenna element; and
the VHF antenna element is in front of or behind the UHF antenna element.
17. The antenna assembly of claim 14 , wherein the antenna assembly does not include a diplexer and a VHF balun.
18. The antenna assembly of claim 14 , wherein the VHF antenna element comprises a middle portion and first and second extensions extending outwardly from the middle portion.
19. The antenna assembly of claim 18 , wherein the middle portion of the VHF antenna element has a curvature substantially matching a curvature of a curved portion of the UHF antenna element that overlaps and/or is alongside the middle portion of the VHF antenna element.