Antenna control system
First Claim
Patent Images
1. Drive means for adjusting the relative phase shifts produced by a plurality of phase shifters connected to an array of radiating elements, said drive means including:
- first means for moving a first portion of a first phase shifter relative to a second portion of said first phase shifter to vary the phase difference between output signals from the first phase shifter; and
second means for moving a first portion of a second phase shifter relative to a second portion of said second phase shifter to vary the phase difference between output signals from the second phase shifter, wherein the second phase shifter is fed from an output of the first phase shifter and the degree of movement of the second means is dependent upon the degree of movement of the first means.
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Abstract
The present invention may find particular application in antenna systems, such as those used in cellular communication systems.
4 Citations
21 Claims
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1. Drive means for adjusting the relative phase shifts produced by a plurality of phase shifters connected to an array of radiating elements, said drive means including:
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first means for moving a first portion of a first phase shifter relative to a second portion of said first phase shifter to vary the phase difference between output signals from the first phase shifter; and
second means for moving a first portion of a second phase shifter relative to a second portion of said second phase shifter to vary the phase difference between output signals from the second phase shifter, wherein the second phase shifter is fed from an output of the first phase shifter and the degree of movement of the second means is dependent upon the degree of movement of the first means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 19)
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14. An antenna system comprising one or more antenna, each including electromechanical means for varying the downtilt of the antenna beam;
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a controller, external to the one or more antenna, for supplying drive signals to the electromechanical means for adjusting downtilt. - View Dependent Claims (18, 20, 21)
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Specification