ELECTROMAGNETIC WAVE SENSOR AND/OR EMITTER

• US 20150130481A1
• Filed: 11/05/2014
• Published: 05/14/2015
• Est. Priority Date: 11/13/2013
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Debray, Alexis
• Granted Patent: US 9,893,423 B2
• Time in Patent Office: Days
• US Class Current: 324/637
• CPC Class Codes: G01N 22/00 Investigating or analysing materials by the use of microwaves or radio waves, i.e. electromagnetic waves with a wavelength of one millimetre or more G01N3/00 - G01N17/00, G01N24/00 take precedence
• CPC Class Codes: G01R 27/00 Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
• CPC Class Codes: G01R 27/06 Measuring reflection coefficients; Measuring standing-wave ratio
• CPC Class Codes: G01S 13/0209 Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
• CPC Class Codes: G01S 13/89 for mapping or imaging
• CPC Class Codes: H01Q 1/248 provided with an AC/DC converting device, e.g. rectennas
• CPC Class Codes: H01Q 5/40 Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop

Abstract

Provided is a device for performing at least one of detection and emission of electromagnetic waves, including a plurality of antennas, in which a first antenna includes a first radiating element and a first electronic element electrically connected to the first radiating element, and is sensitive to a first frequency band, and in which a second antenna includes a second radiating element and a second electronic element electrically connected to the second radiating element, and is sensitive to a second frequency band. At least a part of the second radiating element is arranged inside the first radiating element.

Claims

1. A device for performing at least one of detection and emission of electromagnetic waves which consists at least of two antennas:

the first antenna comprising;

a first radiating element,

a first electronic element electrically connected to the first radiating elements;

the first antenna being sensitive to a first frequency band of interest,

the second antenna comprising;

a second radiating element partially placed inside the first radiating element,

a second electric element electrically connected to the second radiating elements;

the second antenna being sensitive to a second frequency band of interest.

2. A device according to claim 1, further comprising:

a semiconductor substrate; and

a recess onto a surface of the semiconductor substrate,

wherein a part of the first radiating element is arranged above the recess, and another part of the first radiating element is arranged on the semiconductor substrate,

wherein the first electronic element is arranged on the semiconductor substrate,

wherein a part of the second radiating element is arranged above the recess, and another part of the second radiating element is arranged on the semiconductor substrate, and

wherein the second electronic element is arranged on the semiconductor substrate.

3. A device according to claim 1, wherein the second radiating element is completely placed inside the first radiating element.

4. A device according to claim 1, wherein the first radiating element and the second radiating element of both antenna has a linear loop shape.

5. A device according to claim 4, wherein the first radiating element and the second radiating element each having the linear loop shape are both excited around their second antiresonant frequency.

6. A device according to claim 4, wherein the first radiating element and the second radiating element each having the linear loop shape are electrically connected to each other at a node of the electromagnetic field at which the current is maximum.

7. A device according to claim 4, wherein the second radiating element spatially crosses the first radiating element at a position at which the current is minimum.

8. A device according to claim 4, wherein the first radiating element and the second radiating element each having the linear loop shape are electrically disconnected from each other.

9. A device according to claim 1, wherein the first radiating element and the second radiating element have a planar shape.

10. A device according to claim 9, wherein the planes on which the first radiating element and the second radiating element are placed are parallel to each other.

11. A device according to claim 10, wherein the planes on which the first radiating element and the second radiating element are arranged are separated by a distance of 1/10 or less of a wavelength corresponding to a minimum working frequency.

12. A device according to claim 9, wherein the first radiating element and the second radiating element are arranged within the same plane.

13. A device according to claim 1, wherein the first antenna and the second antenna are configured to radiate or receive linearly polarized light beams that are different in polarization direction from each other.

14. A device according to claim 13, wherein operating frequencies of the first antenna and the second antenna are identical to each other.

15. A device according to claim 13, wherein the first radiating element and the second radiating element have loop shapes with the same length.

16. A device according to claim 2, wherein the recess is filled with a material.

17. A device according to claim 2, further comprising a support portion that protrudes to the recess and is configured to support at least one of the first electronic element or the second electronic element.

18. A device according to claim 2, further comprising a pillar configured to support at least one of the first electronic element or the second electronic element, the pillar being formed in the recess.

19. A device according to claim 17, wherein the support portion for the second electronic element crosses the first antenna in a position of the first radiating element at which a current is minimum.

20. A device according to claim 1, wherein the first electronic element and the second electronic element each comprise a rectifier.

21. A device according to claim 1, wherein the first electronic element and the second electronic element each comprise an oscillator.

22. A device according to claim 1, wherein the electromagnetic wave contains a component of a frequency of 0.1 terahertz to 10 terahertz.

23. A device according to claim 20, wherein the first radiating element and the second radiating element each comprise one of a cut and a signal extraction portion.

24. An apparatus, comprising a plurality of the device for performing at least one of detection and emission of electromagnetic waves according to claim 1 including a first and a second devices sensing electromagnetic waves,

wherein, in the first devices sensing electromagnetic waves, an antenna that is sensitive to a higher frequency is sensitive to first polarization and an antenna that is sensitive to a lower frequency is sensitive to second polarization, and

wherein, in the second devices sensing electromagnetic waves, an antenna that is sensitive to the lower frequency is sensitive to the first polarization, and an antenna that is sensitive to the higher frequency is sensitive to the second polarization.

25. The device of claim 1 in which the rectifying element of the second antenna is placed inside the radiating element of the first antenna.