Systems and methods for digital delayed array transmitter architecture with beam steering capability for high data rate
First Claim
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1. A method for beam steering in a wide band wireless system, comprising:
- distributing a digital signal from a modulator to each of a plurality of branches, each branch leading to an antenna in array of antennas;
controllably delaying by inverters the digital signal received from a modulator;
passing the signal to a digital to analog converter;
controllably delaying by inverters a digital signal processed by the digital to analog converter to achieve beam steering of a wide band signal; and
delaying, via a variable delay element, an analog signal output by the digital to analog converter.
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Abstract
Embodiments include systems and methods for fine control of beam steering for wide band wireless applications using a phased array of antenna elements. In one embodiment, a digitally controlled delay line delays the signal output from a modulator in each branch of multiple branches feeding multiple antennas in an array. An output of the digital delay line is input to a digital to analog converter. A second digital delay line also delays the signal within the digital to analog converter. The manner of implementation of the delays enables accurate production of a steered beam at a high data rate.
22 Citations
20 Claims
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1. A method for beam steering in a wide band wireless system, comprising:
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distributing a digital signal from a modulator to each of a plurality of branches, each branch leading to an antenna in array of antennas; controllably delaying by inverters the digital signal received from a modulator; passing the signal to a digital to analog converter;
controllably delaying by inverters a digital signal processed by the digital to analog converter to achieve beam steering of a wide band signal; anddelaying, via a variable delay element, an analog signal output by the digital to analog converter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for beam steering in a wide band wireless system, comprising:
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a modulator to output an information bearing digital signal to a plurality of branches, each branch leading to an antenna in array of antennas; a controllable delay line of inverters to controllably delay a digital signal received from the modulator and to pass the signal to a digital to analog converter; a controllable delay line of inverters to delay the digital signal processed by the digital to analog converter to achieve beam steering of a wide band signal; and a variable delay element to delay an analog signal output by the digital to analog converter. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A system for beam steering in a wide band wireless system, comprising:
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a modulator to output an information bearing digital signal to a plurality of branches, each branch leading to an antenna in array of antennas; a controllable delay line of inverters to controllably delay a digital signal received from the modulator and to pass the signal to a digital to analog converter (modulator line); and a controllable delay line of inverters to delay the digital signal processed by the digital to analog converter (DAC line) to achieve beam steering of a wide band signal; wherein either the modulator line or the DAC line or both comprises a delay locked loop, comprising a phase detector and a low-pass filter. - View Dependent Claims (17, 18, 19, 20)
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Specification