Phased array system using baseband phase shifting
AssigneeIowa State University Research Foundation, Inc.
InventorsRobert J. Weber, Shannon Wanner, Hsin-Jan Fu, Saalini Sekar
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Abstract
A method of spatial control of a phased array system having a plurality of antenna elements is provided. The method includes providing a baseband signal, baseband phase shifting the baseband signal to provide a plurality of baseband shifted signals for controlling phase of each of the plurality of antenna elements, upconverting each of the baseband shifted signals to a radio frequency signal, and applying each of the radio frequency signals to the plurality of antenna elements to thereby provide for spatial control of the phased array system. A hardware architecture for a phased array system is also provided.
Claims19
A method of spatial control of a phased array system having a plurality of antenna elements, the method comprising:
- providing a baseband signal;
- baseband phase shifting the baseband signal to provide a plurality of baseband shifted signals for controlling phase of each of the plurality of antenna elements;
- upconverting each of the baseband shifted signals to a radio frequency signal;
- applying each of the radio frequency signals to the plurality of antenna elements to thereby provide for the spatial control of the phased array system.
A phased array system, comprising:
- a plurality of integrated antenna elements;
- a phase adjusting circuit comprising active phase shifters adapted to provide baseband phase shifts in a baseband signal, the active phase shifters comprising phase locked loops configured to receive a phase aid to increase speed;
- an upconverter circuit operatively connected between the phase adjusting circuit and the plurality of integrated antenna elements and adapted to upconvert the baseband signal to a radio frequency signal.
A method of spatial control of a phased array system having a plurality of antenna elements, the method comprising:
- providing a baseband signal;
- baseband phase shifting the baseband signal, the step of baseband phase shifting comprising (a) using a variable phase shifter to provide a plurality of baseband shifted signals for controlling phase of each of the plurality of antenna elements, wherein each of the variable phase shifters comprises a phased lock loop, (b) providing a phase aid to each of the phased lock loops;
- upconverting each of the baseband shifted signals to a radio frequency signal;
- applying each of the radio frequency signals to the plurality of antenna elements to thereby provide for the spatial control of the phased array system.
A phased array system, comprising:
- a plurality of integrated antenna elements;
- for each of the integrated antenna elements,
- (a) a serial in, serial out shift register electrically connected to receive as input a reference clock signal and a phased lock loop feedback signal,
- (b) a multiplexer electrically connected to the shift register,
- (c) a register electrically connected to the multiplexer,
- (d) a phased lock loop electrically connected to the multiplexer, an output of the phase lock loop electrically connected to the shift register to provide the phased lock loop feedback signal,
- (e) an amplifier electrically connected to the output of each of the phased lock loops,
- (f) an output of the amplifier electrically connected as input to one of the integrated antenna elements.
Dependencies are inferred from the claim text.