Antenna

1. A unilateral antenna comprising a dielectric resonator fed by an off-center probe feeder connected to a ground plane,

wherein the probe feeder passes through the ground plane and is disposed within a hole in the dielectric resonator such that the probe feeder inserts into the hole and is embedded in the dielectric resonator;

wherein the probe feeder is positioned shifted from a center position of the dielectric resonator; and

wherein the probe feeder is arranged to simultaneously excite the dielectric resonator in at least a first dielectric resonator mode and a second dielectric resonator mode, such that the dielectric resonator is further arranged to emit an electromagnetic radiation unilaterally along a wave propagation axis upon an electric excitation input to the probe feeder, wherein the electromagnetic radiation is equivalent to a combination of a plurality of electromagnetic wave components including a first electromagnetic wave component being equivalent to an x-directed magnetic dipole and a second electromagnetic wave component being equivalent to a z-directed electric dipole, and wherein the first and the second electromagnetic wave components are respectively arranged in a first and a second direction along an x-axis and a z-axis respectively, and wherein each of the first and the second direction is orthogonal to the wave propagation axis along ay-axis of a three-dimensional space.

2. The unilateral antenna in accordance with claim 1 , wherein the-ground plane is perpendicular to the z-axis.

3. The unilateral antenna in accordance with claim 1 , wherein the first electromagnetic wave component is arranged to produce a broadside radiation pattern in the first direction.

4. The unilateral antenna in accordance with claim 3 , wherein the second electromagnetic wave component is arranged to produce a quasi-omnidirectional radiation pattern in a second direction.

5. The unilateral antenna in accordance with claim 4 , wherein the first and the second electromagnetic wave components combine and form a complementary field pattern equivalent to a field pattern of the electromagnetic radiation.

6. The unilateral antenna in accordance with claim 5 , wherein the first electromagnetic wave component is exited in a fundamental mode of the dielectric resonator.

7. The unilateral antenna in accordance with claim 6 , wherein the second electromagnetic wave component is exited in a higher-order mode of the dielectric resonator.

8. The unilateral antenna in accordance with claim 4 , wherein the first electromagnetic wave component includes an O-shape field pattern and an ∞-shape field pattern in a yz-plane and a xy-plane respectively.

9. The unilateral antenna in accordance with claim 8 , wherein the second electromagnetic wave component includes an ∞-shape field pattern and an elliptical-shape field pattern in a yz-plane and a xy-plane respectively.

10. The unilateral antenna in accordance with claim 9 , wherein the second electromagnetic wave component includes a stronger H y component than a H x component in the xy-plane.

11. The unilateral antenna in accordance with claim 1 , wherein the probe feeder is positioned through the ground plane and is disposed within a hole in the dielectric resonator.

12. The unilateral antenna in accordance with claim 1 , wherein the ground plane includes a dimension substantially equal to a planar surface of the dielectric resonator.

13. The unilateral antenna in accordance with claim 12 , wherein the ground plane is positioned adjacent to the planar surface.

14. The unilateral antenna in accordance with claim 12 , wherein planar surface is substantially rectangular in shape.

15. The unilateral antenna in accordance with claim 1 , wherein the dielectric resonator is a rectangular block of dielectric material.

16. An antenna array comprising a plurality of antenna in accordance with claim 1 .

17. The antenna array in accordance with claim 16 , wherein each of the wave propagation axes of the respective antenna includes an orientation different from each other.

18. The antenna array in accordance with claim 16 , wherein at least two of the wave propagation axis of the respective antenna are oriented in parallel.