Communication module and electromagnetic flux controlling member used for the same
A communication module including a primary radiator for transmitting an electromagnetic flux, and an electromagnetic flux controlling member for controlling a travelling direction of the electromagnetic flux sent from the primary radiator. The electromagnetic flux controlling member includes an incidence surface and an emission surface. The incidence surface and the emission surface are configured such that the electromagnetic flux emitted is expanded than the electromagnetic flux transmitted from a focal position of a reference lens optimized to collimate the electromagnetic flux from the primary radiator and emitted after incidence on the reference lens on a basis of an emission angle of the electromagnetic flux emitted from the primary radiator, a dielectric constant of the electromagnetic flux controlling member, and an arbitrarily set focal length of the electromagnetic flux controlling member.
1. A communication module comprising:
a primary radiator configured to transmit an electromagnetic flux; and
an electromagnetic flux controlling member configured to control a travelling direction of the electromagnetic flux sent from the primary radiator,
wherein the electromagnetic flux controlling member includes:
an incidence surface configured to allow incidence of the electromagnetic flux sent from the primary radiator, and
an emission surface configured to emit to outside the electromagnetic flux entered from the incidence surface, and
wherein the incidence surface and the emission surface are configured such that the electromagnetic flux emitted from the emission surface is expanded than the electromagnetic flux transmitted from a focal position of a reference lens optimized to collimate the electromagnetic flux from the primary radiator and emitted after incidence on the reference lens on a basis of an emission angle of the electromagnetic flux emitted from the primary radiator, a dielectric constant of the electromagnetic flux controlling member, and an arbitrarily set focal length of the electromagnetic flux controlling member.
2. The communication module according to claim 1 , wherein the reference lens includes:
a reference incidence surface corresponding to the incidence surface and configured to allow incidence of the electromagnetic flux, and
a reference emission surface corresponding to the emission surface and configured to emit, to outside, the electromagnetic flux entered from the reference incidence surface.
3. The communication module according to claim 2 ,
wherein when an absolute value of a vertex curvature radius of the reference incidence surface is greater than an absolute value of a vertex curvature radius of the reference emission surface when the absolute value of the vertex curvature radius of the reference incidence surface and the absolute value of the vertex curvature radius of the reference emission surface are compared with each other,
a vertex curvature radius of the incidence surface is the same as the vertex curvature radius of the reference incidence surface, and
an absolute value of a vertex curvature radius of the emission surface that is a convex surface is greater than the absolute value of the vertex curvature radius of the reference emission surface.
4. An electromagnetic flux controlling member configured to be used for the communication module according to claim 3 .
5. The communication module according to claim 2 ,
wherein when an absolute value of a vertex curvature radius of the reference emission surface is greater than an absolute value of a vertex curvature radius of the reference incidence surface when the absolute value of the vertex curvature radius of the reference incidence surface and the absolute value of the vertex curvature radius of the reference emission surface are compared with each other,
a vertex curvature radius of the emission surface is the same as the vertex curvature radius of the reference emission surface, and
an absolute value of a vertex curvature radius of the incidence surface that is a concave surface is smaller than the absolute value of the vertex curvature radius of the reference incidence surface.
6. An electromagnetic flux controlling member configured to be used for the communication module according to claim 5 .
7. An electromagnetic flux controlling member configured to be used for the communication module according to claim 2 .
8. The communication module according to claim 1 ,
wherein when a distance between the primary radiator and a reception part configured to receive the electromagnetic flux sent from the primary radiator is 5 m,
the primary radiator and the reception part including a receiver are modules with the same configuration, and
the primary radiator is disposed near the electromagnetic flux controlling member than the focal position of the reference lens,
a coupling loss of the electromagnetic flux transmitted from the primary radiator and received by the reception part is within a range of 0 to −61 dB.
9. An electromagnetic flux controlling member configured to be used for the communication module according to claim 8 .
10. The communication module according to claim 1 ,
wherein when the primary radiator and a reception part configured to receive the electromagnetic flux sent from the primary radiator are separated from each other by a certain distance,
the primary radiator and the reception part including a receiver use modules with the same configuration, and
the primary radiator is disposed near the electromagnetic flux controlling member than the focal position of the reference lens,
a coupling loss of the electromagnetic flux transmitted from the primary radiator and received by the reception part is within a range of 0 to −61 dB.
11. An electromagnetic flux controlling member configured to be used for the communication module according to claim 10 .
12. The communication module according to claim 1 , wherein the electromagnetic flux is a millimeter wave, a quasi-millimeter wave, or a terahertz wave.
13. An electromagnetic flux controlling member configured to be used for the communication module according to claim 12 .
14. The communication module according to claim 1 , wherein an alignment layer configured to suppress reflection of the electromagnetic flux is disposed at the incidence surface or the emission surface.
15. The communication module according to claim 14 , wherein the alignment layer is a plurality of protrusions.
16. An electromagnetic flux controlling member configured to be used for the communication module according to claim 15 .
17. An electromagnetic flux controlling member configured to be used for the communication module according to claim 14 .
18. An electromagnetic flux controlling member configured to be used for the communication module according to claim 1 .