RF system for distribution of over the air content for in-building applications
A system is described for distributing over the air (OTA) channels within buildings and homes. The system can implement one or more active multi-mode antennas for improved performance and reliability. The system can be configured as a mesh network where multiple nodes are distributed to improve the probability of channel capture across the VHF and UHF frequencies used for over the air TV distribution. A node consists of a beam steering antenna that operates at the VHF and UHF frequencies for TV signal reception, a receiver and demodulation circuit, a transcoder to convert the received information for re-distribution, and a transceiver capable of operation at a secondary frequency band for use in re-distributing the information to communication devices in proximity of the node. The secondary frequency band can be the common WLAN (Wireless Local Area Network) system such as Wi-Fi, with the Wi-Fi transceiver also containing beam steering antennas for improved in-building propagation of the re-distributed information.
1. An antenna system comprising:
a modal antenna configured to receive RF signals in an over-the-air band, the modal antenna operable in a plurality of different modes, each of the plurality of modes having a distinct radiation pattern, the modal antenna comprising a radiating element, one or more parasitic elements, and one or more active tuning components; and
a cable communicatively coupled to the modal antenna, the cable configured to be plugged into a wireless local area network router to communicate the RF signals to the wireless local area network router.
2. The antenna system of claim 1 , wherein the over-the-air band comprises an ultra high frequency (UHF) band or a very high frequency (VHF) band.
3. The antenna system of claim 2 , wherein the UHF band ranges from 30 megahertz (MHz) to 300 MHz.
4. The antenna system of claim 2 , wherein the VHF band ranges from 300 MHz to 3 gigahertz (GHz).
5. The antenna system of claim 4 , wherein the one or more active tuning components are coupled to a corresponding parasitic element of the one or more parasitic elements.
6. The antenna system of claim 4 , wherein the one or more parasitic elements comprise:
a first parasitic element positioned within an antenna volume defined between the radiating element and a circuit board; and
a second parasitic element positioned outside of the antenna volume.
7. The antenna system of claim 1 , wherein the cable comprises a coaxial cable.
8. The antenna system of claim 1 , wherein the modal antenna is operable to receive the RF signals in the over-the-air band from a television transmission tower.
9. A method for communicating RF signals in an over-the-air band to a wireless local area network router, the method comprising:
receiving the RF signals at a modal antenna configurable in a plurality of modes, the modal antenna comprising a radiating element, one or more parasitic elements, and one or more active tuning components, each of the plurality of modes having a distinct radiation pattern; and
communicating the RF signals to the wireless local area network router via a cable communicatively coupled to the modal antenna.
10. The method of claim 9 , wherein the over-the-air band comprises a very high frequency (VHF) band or an ultra high frequency (UHF) band.
11. The method of claim 9 , wherein communicating, via a cable, the RF signals in the over-the-air band to a wireless local area network router comprises communicating, via the cable, the RF signals in the over-the-air band to the wireless local area network router for translation to a WiFi band.
12. The method of claim 11 , wherein the WiFi band comprises RF signals having a frequency in one or more the following bands: 2.4 GHz (802.11 b/g/n), 3.65 GHz (802.11 y), 4.9 GHz (802.11 j), 5 GHz (802.11 a/h/j/n/ac), 5.9 GHZ (802.11 p), 60 GHz (802.11 ad), and 900 MHz (802.11 ah).