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US 12,431,947 B2Granted
Beam steering method and device using frequency modulation and phase shift
AssigneeKorea Astronomy and Space Science Institute
InventorJiwoong Yu
Life of this patent
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Abstract
The present invention relates to a beam steering device of a phased array antenna for reducing a grating lobe, and more particularly, to a beam steering device of a phased array antenna for reducing a grating lobe so that grating lobes generated when receiving a signal by rotating an array of a plurality of antenna elements at a predetermined angle during transmission do not overlap each other when receiving the signal through the beam steering device.
Claims14
A beam steering device, comprising:
- a plurality of antenna elements each that output a received signal to an outside in a predetermined beam direction and receive the signal received from the outside;
- a plurality of phase shifters each that are connected to the plurality of antenna elements to adjust and output a phase of the signal received by the antenna elements or receive the signal from the antenna elements to adjust and output the phase;
- a signal processor that generates an IQ signal of a baseband waveform and outputs the generated IQ signal to the phase shifter or extracts the IQ signal from the signal received from the phase shifter;
- and
- a control unit that controls the plurality of antenna elements, the plurality of phase shifters, and the signal processor so that the signal is output or received in a predetermined beam direction,
- wherein the control unit sets the array of the plurality of antenna elements during transmission and the array of the plurality of antenna elements during reception to be different from each other so that a grating lobe generated during the transmission through the plurality of antenna elements and a grating lobe or a side lobe generated during the reception do not overlap each other.
3 more elements
A beam steering device, comprising:
- a plurality of antenna elements each that output a received signal to an outside in a predetermined beam direction and receive the signal received from the outside;
- a plurality of phase shifters each that are connected to the plurality of antenna elements to adjust and output a phase of the signal received by the antenna elements or receive the signal from the antenna elements to adjust and output the phase;
- a signal processor that generates an IQ signal of a baseband waveform and outputs the generated IQ signal to the phase shifter or extracts the IQ signal from the signal received from the phase shifter;
- and
- a control unit that controls the plurality of antenna elements, the plurality of phase shifters, and the signal processor so that the signal is output or received in a predetermined beam direction,
- wherein the control unit sets a beam directivity direction of a main lobe output during transmission to be different from the beam directivity direction of the main lobe during reception so that a grating lobe generated during the transmission through the plurality of antenna elements and a grating lobe generated during the reception do not overlap each other.
3 more elements
Dependencies are inferred from the claim text.