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US 2022/0037785 A1Published application
Method of driving phased array antenna and method of driving radio wave reflecting device
AssigneeJapan Display Inc.
InventorMitsutaka OKITA
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a method of driving a phased array antenna, includes applying voltages to phase control electrodes in a first period such that radio waves to be emitted from antennas are in a same phase in a first emission direction, and applying the voltages to the phase control electrodes in a second period such that the radio waves to be emitted from the antennas are held in the same phase in the first emission direction. An absolute value of the voltage applied in the second period is different from an absolute value of the voltage applied in the first period, in each of the phase control electrodes.
Claims20
A method of driving a phased array antenna,
- the phased array antenna, comprising:
- a first substrate that includes a plurality of antennas arranged at an interval along an X axis and a plurality of phase control electrodes that are electrically independent from each other;
- a second substrate that includes a common electrode facing the phase control electrodes in a direction parallel to a Z axis that is orthogonal to the X axis;
- and
- a liquid crystal layer that is held between the first substrate and the second substrate and faces the phase control electrodes,
- each phase shifter including a phase control electrode of the phase control electrodes, a portion of the common electrode that faces the phase control electrode, and a region of the liquid crystal layer that faces the phase control electrode,
- each of the phase control electrodes transmitting a high-frequency signal to be input to a corresponding antenna of the antennas,
- the phase shifter adjusting a phase of the high-frequency signal in accordance with a voltage to be applied to the phase control electrode,
- each of the antennas emitting an radio wave based on the high-frequency signal,
- a direction at a first angle with respect to the Z axis being a first emission direction,
- the method comprising:
- applying the voltages to the phase control electrodes in a first period such that the radio waves to be emitted from the antennas are in the same phase in the first emission direction;
- and
- applying the voltages to the phase control electrodes in a second period following the first period such that the radio waves to be emitted from the antennas are held in the same phase in the first emission direction,
- wherein an absolute value of the voltage applied in the second period is different from an absolute value of the voltage applied in the first period, in each of the phase control electrodes.
12 more elements
A method of driving a radio wave reflecting device,
- the radio wave reflecting device, comprising:
- a first substrate that includes a plurality of patch electrodes arranged in a matrix at an interval along each of an X axis and a Y axis that are orthogonal to each other;
- a second substrate that includes a common electrode facing the patch electrodes in a direction parallel to a Z axis that is orthogonal to each of the X axis and the Y axis;
- and
- a liquid crystal layer that is held between the first substrate and the second substrate and faces the patch electrodes,
- each reflection control portion including a patch electrode of the patch electrodes, a portion of the common electrode that faces the patch electrode, and a region of the liquid crystal layer that faces the patch electrode,
- the first substrate including an incidence surface on a side opposite to a side facing the second substrate,
- each of the reflection control portions adjusting a phase of an radio wave to be incident from the incidence surface side in accordance with a voltage to be applied to the patch electrode and reflecting the radio wave onto the incidence surface side,
- a direction at a first angle with respect to the Z axis being a first reflection direction,
- the method comprising:
- applying the voltages to the patch electrodes in a first period such that the radio waves to be reflected on the reflection control portions are in the same phase in the first reflection direction;
- and
- applying the voltages to the patch electrodes in a second period following the first period such that the radio waves to be reflected on the reflection control portions are held in the same phase in the first reflection direction,
- wherein an absolute value of the voltage applied in the second period is different from an absolute value of the voltage applied in the first period, in each of the patch electrodes.
11 more elements
A method of driving a radio wave reflecting device,
- the radio wave reflecting device, comprising:
- a first substrate that includes a common electrode and a plurality of phase control electrodes;
- a second substrate that includes a plurality of patch electrodes arranged in a matrix at an interval along each of an X axis and a Y axis that are orthogonal to each other and facing the common electrode and the phase control electrodes in a direction parallel to a Z axis that is orthogonal to each of the X axis and the Y axis;
- and
- a liquid crystal layer that is held between the first substrate and the second substrate and faces the patch electrodes,
- each reflection control portion including a patch electrode of the patch electrodes, a portion of the common electrode that faces the patch electrode, a phase control electrode of the phase control electrodes that faces the patch electrode, and a region of the liquid crystal layer that faces the patch electrode,
- the second substrate including an incidence surface on a side opposite to a side facing the first substrate,
- each of the reflection control portions adjusting a phase of an radio wave to be incident from the incidence surface side in accordance with a voltage to be applied to the phase control electrode and reflecting the radio wave onto the incidence surface side,
- a direction at a first angle with respect to the Z axis being a first reflection direction,
- the method comprising:
- applying the voltages to the phase control electrodes in a first period such that the radio waves to be reflected on the reflection control portions are in the same phase in the first reflection direction;
- and
- applying the voltages to the phase control electrodes in a second period following the first period such that the radio waves to be reflected on the reflection control portions are held in the same phase in the first reflection direction,
- wherein an absolute value of the voltage applied in the second period is different from an absolute value of the voltage applied in the first period, in each of the phase control electrodes.
11 more elements
Dependencies are inferred from the claim text.