ANTENNA ARRAY FOR A HI/LO ANTENNA BEAM PATTERN AND METHOD OF UTILIZATION
Antenna arrays configured to produce directional antenna beam patterns are described. An antenna array produces a Hi antenna beam pattern and a Lo antenna beam pattern. Based on received satellite information, a mechanically scanning directional antenna system operates to adjust the azimuth direction of the antenna between the two beam patterns to maintain optimum satellite signal reception at different geographical locations and different elevation angles. In one embodiment an antenna mechanically adjusts direction based on geographical location information such as latitude and longitude received by a Global Positioning System (GPS) receiver. In another embodiment, an antenna mechanically adjusts its direction based on received satellite quality metrics such as signal to noise ratio, bit error rate, and/or received power, and uses these signal quality metrics to track the satellite.
1 . A Hi/Lo antenna system, comprising:
an antenna array including a plurality of antenna elements configured to provide a first beam pattern of a high elevation angle and a second beam pattern of a low elevation angle; and
a receiver unit configured to receive a first satellite signal from the antenna array, said receiver unit including a control module disposed to facilitate adjustment of the antenna array so as to optimize reception of the first satellite signal.
2 . The system of claim 1 further comprising a location receiver module, said location receiver module disposed to provide receiver location data related to the location of the receiver unit.
3 . The system of claim 2 wherein the location receiver module comprises a GPS receiver.
4 . The system of claim 2 further comprising a processor module disposed to receive said receiver location data and select, based at least in part on said receiver location data, one of the first beam pattern and second beam pattern to receive the first satellite signal.
5 . The system of claim 4 wherein the receiver unit comprises a memory disposed to store a set of satellite location data related to the position of said first satellite.
6 . The system of claim 5 wherein the one of the first beam pattern or second beam pattern is selected based at least in part on said receiver location data and said satellite location data.
7 . The system of claim 1 wherein said control module includes an electromagnetic device coupled to the antenna array to adjust a position of the antenna array so as to optimize reception of the first satellite signal.
8 . The system of claim 7 wherein the electromagnetic device is disposed to rotate a position of the antenna array to change the azimuth angle of the antenna array.
9 . The system of claim 7 wherein the electromagnetic device is an electric motor.
10 . The system of claim 1 further comprising a processor module; and
a satellite receiver module disposed to receive the first satellite signal from the antenna array and provide a satellite receiver output signal to the processor module, said output signal provided, at least in part, to optimize reception of the first satellite signal.
11 . The system of claim 10 wherein the processor module is disposed to select one of the first beam pattern and second beam pattern to receive the first satellite signal responsive to the satellite receiver output signal.
12 . The system of claim 11 wherein said selecting is based at least in part on a first signal metric of the first satellite signal.
13 . The system of claim 12 wherein the first signal metric is a signal strength.
14 . The system of claim 12 wherein the first signal metric is a bit error rate.
15 . The system of claim 12 wherein the first signal metric is a signal to noise ratio.
16 . The system of claim 12 wherein said selecting is based in part on a second signal metric of the first satellite signal.
17 . The system of claim 12 wherein a successive signal metric of the first satellite signal is further used by the receiver unit to facilitate tracking of the first satellite by the antenna array.
18 . A Hi/Lo antenna system, comprising:
an antenna array including a plurality of antenna elements configured to provide a first beam pattern of a high elevation angle and a second beam pattern of a low elevation angle; and
a receiver unit configured to receive a first satellite signal from the antenna array, said receiver unit including:
a processor module;
a location receiver module disposed to provide location data related to the location of the receiver unit to the processor module;
a satellite receiver module disposed to receive the first satellite signal from the antenna array and provide a first satellite output signal to the processor module; and
a control module disposed to receive a signal from the processor module to facilitate adjustment of the antenna array so as to optimize reception of the first satellite signal.
19 . The system of claim 18 wherein the location receiver module comprises a GPS receiver.
20 . The system of claim 19 wherein the processor module is disposed to select one of the first beam pattern and second beam pattern to receive the first satellite signal responsive to said data provided by the location receiver module.
21 . The system of claim 20 wherein the processor module is further disposed to track, based at least in part on the first satellite output signal, the first satellite.
22 . A method of facilitating satellite signal reception using a Hi/Lo antenna array comprising:
selecting one of a Hi beam pattern and a Lo beam pattern of the antenna array; and
providing, to a control module coupled to the antenna array, a control signal to facilitate adjustment of the antenna array to optimize reception of a signal provided by the satellite.
23 . The method of claim 22 further comprising receiving a set of antenna array location data related to the location of the antenna array; wherein said selecting comprises selecting one of a Hi beam pattern and a Lo beam pattern based at least in part on said antenna array location data.
24 . The method of claim 22 wherein the location data is provided from a GPS receiver.
25 . The method of claim 22 further comprising receiving a satellite signal from the satellite;
providing a signal metric associated with said satellite signal; and
providing, based at least in part on said signal metric, the control signal.