1. A reflective meta-surface (502), comprising:
a plurality of unit cells (101) arranged in a pre-defined pattern,
wherein each of the plurality of unit cells (101) comprises:
a quadrilateral-shaped substrate (102) of dielectric material comprising
a top surface (102A) and a bottom surface (102B);
a conducting plane (104) disposed on the top surface (102A); and
a loading plane (106) disposed on the bottom surface (102B),
wherein the conducting plane (104) comprises a first outer
surface (202) and a first inner surface (204),
wherein the first inner surface (204) comprises a first
quadrilateral structure with sides parallel to corresponding sides
(108A-D) of the top surface (102A) of the substrate (102),
wherein the first outer surface (202) comprises four Tshaped structures (206A-D),
wherein each of the four T-shaped structures (206A-D)
comprises:
a horizontal arm (208A-D) aligned with the
corresponding side (108A-D) of the top surface (102A)
of the substrate (102), and
a vertical arm (210A-D) comprising a first end
(212A-D) and a second end (214A-D),
wherein the first end (212A-D) of the vertical arm
(210A-D) is connected to the corresponding horizontal
arm (208A-D) and the second end (214A-D) is connected
to the corresponding side of the first quadrilateral
structure; and
wherein the loading plane (106) comprises a second outer
surface (304) and a second inner surface (306),
wherein the second outer surface (304) comprises a second
quadrilateral structure with sides coinciding with corresponding sides
(108A-D) of the bottom surface (102B) of the substrate (102),
13
wherein the second inner surface (306) comprises a plus-shaped
structure, and
wherein the conducting plane (104) and the loading plane (106)
are placed on the top surface (102A) and the bottom surface (102B)
respectively such that a centre (112) of the plus-shaped structure and a
centre (110) of the first quadrilateral structure are colinear.
2. The reflective meta-surface (502) as claimed in claim 1, wherein the conducting plane (104)
and the loading plane (106) are made of an electrically conductive material.
3. The reflective meta-surface (502) as claimed in claim 1, wherein the reflective meta-surface
(502) is configured to reflect electromagnetic waves having an incident angle in a range of 0
to 30 degrees with respect to a normal of the reflective meta-surface (502).
4. The reflective meta-surface (502) as claimed in claim 1, wherein the reflective meta-surface
(502) is configurable to reflect electromagnetic waves in a predefined frequency range of n258
band of the electromagnetic spectrum for wireless communication.
5. The reflective meta-surface (502) as claimed in claim 4, wherein the reflective meta-surface
(502) is configured to reflect electromagnetic waves in the predefined frequency range of 24.75
to 27.75 GHz.
6. The reflective meta-surface (502) as claimed in claim 4, wherein the disposition of the
conducting plane (104) and the loading plane (106) and a dielectric constant of the substrate
(102) configures each of the unit cell (101) of the meta-surface (502) to reflect the
electromagnetic waves in the predefined frequency range.
7. The reflective meta-surface (502) as claimed in claim 1, wherein the pre-defined pattern
comprises a first set of unit cells (101) from the plurality of unit cells (101) arranged in xdirection and a second set of unit cells from the plurality of unit cells (101) arranged in ydirection.
14
8. A method (400) of manufacturing a reflective meta-surface (502), the method (400)
comprising:
arranging (402) a plurality of unit cells (101) in a pre-defined pattern,
wherein each of the plurality of unit cells (101) is formed by disposing a
conducting plane (104) on a top surface (102A) of a quadrilateral-shaped substrate
(102) and a loading plane (120) on a bottom surface (102B) of the substrate (102),
wherein the substrate (102) is made of a dielectric material,
wherein the conducting plane (104) comprises a first outer surface (202)
and a first inner surface (204),
wherein the first inner surface (204) comprises a first
quadrilateral structure with sides parallel to corresponding sides (108AD) of the top surface (102A) of the substrate (102),
wherein the first outer surface (202) comprises four Tshaped structures (206A-D),
wherein each of the four T-shaped structures (206A-D)
comprises:
a horizontal arm (208A-D) aligned with a
corresponding side of the top surface (108A-D) of the top
surface (102A) of the substrate (102), and
a vertical arm (112A-D) comprising a first end
(212A-D) and a second end (214A-D),
wherein the first end (212A-D) of the
vertical arm (210A-D) is connected to the
corresponding horizontal arm (208A-D) and the
second end (214A-D) is connected to a
corresponding side of the first quadrilateral
structure; and
wherein the loading plane (106) comprises a second outer surface (304)
and a second inner surface (306),
wherein the second outer surface (304) comprises a second
quadrilateral structure with sides coinciding with the corresponding
sides (108A-D) of the bottom surface (102B) of the substrate (102),
wherein the second inner surface (306) comprises a plus-shaped
structure, and
15
wherein the conducting plane (104) and the loading plane (106)
are placed on the top surface (102A) and the bottom surface (102B)
respectively such that a centre (112) of the plus-shaped structure and a
centre (110) of the first quadrilateral structure are colinear.
9. The method (400) as claimed in claim 8, wherein the conducting plane (104) and the loading
plane (106) are made of an electrically conductive material.
10. The method (400) as claimed in claim 8, comprising configuring the reflective meta-surface
(502) to reflect electromagnetic waves having an incident angle in a range of 0-30 degrees with
respect to a normal of the reflective meta-surface (502).