Antenna device, system, and transmission/reception method

Patent metadata

Field	Value
Publication number	US-11777230-B2
Application number	US-202117469662-A
Country	US
Kind code	B2
Filing date	Sep 8, 2021
Priority date	Dec 10, 2020
Publication date	Oct 3, 2023
Grant date	Oct 3, 2023

Abstract

According to one embodiment, an antenna device comprises an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna, and a rotation device configured to rotate the antenna panel. A first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna. A second radio wave is irradiated from the first transmission antenna when the rotation angle is a second angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna.

First claim

What is claimed is:

1. An antenna device comprising:
an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna; and
a rotation device configured to rotate the antenna panel around a point on the antenna panel as a rotation center,
wherein:
a first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna;
a second radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a second angle different from the first angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna; and
a distance from the rotation center to the first transmission antenna is longer than any of distances from the rotation center to the first and the second reception antennas.

2. The antenna device according to claim 1 , wherein the first transmission antenna, the first reception antenna, and the second reception antenna are linearly disposed on the antenna panel.

3. The antenna device according to claim 1 , wherein a distance between adjacent antennas on the antenna panel is equal to a length of a wavelength of the first radio wave or the second radio wave.

4. The antenna device according to claim 1 , further comprising an electronic circuit configured to process reception signals of the first reception antenna and the second reception antenna to output information on an object reflecting the first radio wave and the second radio wave.

5. An antenna device comprising:
an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna; and
a rotation device configured to rotate the antenna panel around a point on the antenna panel as a rotation center,
wherein:
a first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna;
a second radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a second angle different from the first angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna; and
a distance from the rotation center to the first transmission antenna is shorter than any of distances from the rotation center to the first and the second reception antennas.

6. The antenna device according to claim 5 , wherein the first transmission antenna, the first reception antenna, and the second reception antenna are linearly disposed on the antenna panel.

7. The antenna device according to claim 5 , wherein a distance between adjacent antennas on the antenna panel is equal to a length of a wavelength of the first radio wave or the second radio wave.

8. The antenna device according to claim 5 , further comprising an electronic circuit configured to process reception signals of the first reception antenna and the second reception antenna to output information on an object reflecting the first radio wave and the second radio wave.

9. An antenna device comprising:
an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna; and
a rotation device configured to rotate the antenna panel around a point on the antenna panel as a rotation center
wherein:
a first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna;
a second radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a second angle different from the first angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna;
the antenna panel further includes a third reception antenna and a fourth reception antenna;
the first transmission antenna, the first, the second, the third, and the fourth reception antennas are disposed in a cross shape having four arms;
a distance from the rotation center to the first transmission antenna is shorter than any of distances from the rotation center to the first, the second, the third, and the fourth reception antennas; and
at least one reception antenna is disposed on each of the four arms.

10. The antenna device according to claim 9 , wherein the first transmission antenna, the first reception antenna, and the second reception antenna are linearly disposed on the antenna panel.

11. The antenna device according to claim 9 , wherein a distance between adjacent antennas on the antenna panel is equal to a length of a wavelength of the first radio wave or the second radio wave.

12. The antenna device according to claim 9 , further comprising an electronic circuit configured to process reception signals of the first reception antenna and the second reception antenna to output information on an object reflecting the first radio wave and the second radio wave.

13. An antenna device comprising:
an antenna panel including a first transmission antenna, a first reception antenna, and a second reception antenna; and
a rotation device configured to rotate the antenna panel around a point on the antenna panel as a rotation center,
wherein:
a first radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a first angle and a reflected radio wave of the first radio wave is received by the first reception antenna and the second reception antenna;
a second radio wave is irradiated from the first transmission antenna when a rotation angle of the antenna panel is a second angle different from the first angle and a reflected radio wave of the second radio wave is received by the first reception antenna and the second reception antenna;
the antenna panel further includes a second transmission antenna;
a third radio wave is irradiated from the second transmission antenna when a rotation angle of the antenna panel is the first angle, and a reflected radio wave of the third radio wave is received by the first reception antenna and the second reception antenna;
a fourth radio wave is irradiated from the second transmission antenna when a rotation angle of the antenna panel is the second angle, and a reflected radio wave of the fourth radio wave is received by the first reception antenna and the second reception antenna; and
a distance from the rotation center to the first transmission antenna and a distance from the rotation center to the second transmission antenna are longer than any of distances from the rotation center to the first and the second reception antennas.

14. The antenna device according to claim 13 , wherein the first transmission antenna, the first reception antenna, and the second reception antenna are linearly disposed on the antenna panel.

15. The antenna device according to claim 13 , wherein a distance between adjacent antennas on the antenna panel is equal to a length of a wavelength of the first radio wave or the second radio wave.

16. The antenna device according to claim 13 , further comprising an electronic circuit configured to process reception signals of the first reception a

Assignees

• Toshiba Kk

Inventors

• Zhu Xu
• Mori Hiroki

Classifications

• H01Q21/26 Primary

  Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre · CPC title

• G01S13/9082

  Rotating SAR [ROSAR] · CPC title

• H01Q3/10

  to produce a conical or spiral scan · CPC title

• H01Q3/04 Primary

  for varying one co-ordinate of the orientation · CPC title

• G01S13/887

  for detection of concealed objects, e.g. contraband or weapons · CPC title