Conductive plane antenna

1. A conductive plane antenna, comprising:

a non-conductive substrate;

a conductive plane coupled to the non-conductive substrate;

wherein the conductive plane includes an open cavity;

wherein the cavity includes a closed end and an open end;

a first feed point coupled to the conductive plane and configured to pass a first polarity of a set of electromagnetic signals; and

a second feed point coupled to the conductive plane and configured to pass a second polarity of the set of electromagnetic signals;

wherein the conductive plane is configured to generate a first antenna gain pattern in response to the first and second polarity signals;

wherein the cavity is configured to generate a second antenna gain pattern in response to the first and second polarity signals;

wherein a magnitude of the first antenna gain pattern is greater than a magnitude of the second antenna gain pattern; and

wherein the open cavity includes a depth having a physical or electrical length at least one-quarter wavelength of a lowest in-band frequency in the set of electromagnetic signals.

2. The antenna of claim 1 :

wherein the cavity further includes a first edge and a second edge; and

wherein the cavity is positioned within the conductive plane such that a first current distribution on the first edge of the cavity is opposite to a second current distribution on the second edge of the cavity.

3. The antenna of claim 2 :

wherein a polarity of the first current distribution at the first edge is opposite to a polarity of the second current distribution on the second edge of the cavity.

4. The antenna of claim 3 :

wherein a magnitude of the first current distribution at the first edge is substantially equal to a magnitude of the second current distribution on the second edge of the cavity.

5. The antenna of claim 1 :

wherein the cavity further includes a first edge and a second edge; and

wherein the cavity is positioned within the conductive plane such that a first current distribution on the first edge of the cavity substantially cancels out a second current distribution on the second edge of the cavity.

6. The antenna of claim 1 :

wherein the first and second feed points are located closer to the closed end of the cavity than the open end.

7. The antenna of claim 1 :

wherein the conductive plane is connected to at least one of: a ground potential, a power supply potential, or an intermediate circuit potential.

8. The antenna of claim 1 :

wherein the conductive plane includes an outer edge having a physical or electrical length of at least one-half wavelength of a lowest in-band frequency in the set of electromagnetic signals.

9. The antenna of claim 1 :

wherein, excluding the open cavity, the conductive plane includes an outer edge which is continuously curved.

10. The antenna of claim 1 :

wherein the conductive plane includes an outer edge; and

wherein the outer edge is defined by an envelope that is either circular or oval in shape.

11. The antenna of claim 1 :

wherein the closed end of the open cavity is located proximate to a geometrical center of the conductive plane.

12. The antenna of claim 1 :

further comprising a conducting reflector on one side of the conductive plane.

13. The antenna of claim 12 :

wherein the conducting reflector is a loudspeaker.

14. The antenna of claim 12 :

wherein the reflector includes a non-conductive cavity aligned with the open cavity in the conductive plane.

15. The antenna of claim 1 :

further comprising a second conductive plane;

wherein the first conductive plane is coupled to the second conductive plane with vias.

16. The antenna of claim 1 :

further comprising a set of electrical circuits or components on a same side of the substrate as the conductive plane; and

wherein the conductive plane surrounds the electrical circuits or components.

17. A conductive plane antenna, comprising:

a non-conductive substrate;

a conductive plane coupled to the non-conductive substrate;

wherein the conductive plane includes an open cavity;

wherein the cavity includes a closed end and an open end;

a first feed point coupled to the conductive plane and configured to pass a first polarity of a set of electromagnetic signals; and

a second feed point coupled to the conductive plane and configured to pass a second polarity of the set of electromagnetic signals;

wherein the conductive plane is configured to generate a first antenna gain pattern in response to the first and second polarity signals;

wherein the cavity is configured to generate a second antenna gain pattern in response to the first and second polarity signals;

wherein a magnitude of the first antenna gain pattern is greater than a magnitude of the second antenna gain pattern;

wherein the cavity further includes a first edge and a second edge; and

wherein the cavity is positioned within the conductive plane such that a first current distribution on the first edge of the cavity is opposite to a second current distribution on the second edge of the cavity.

18. The antenna of claim 17 :

wherein the antenna is embedded in a wearable device; and

wherein the wearable device is at least one of: a wireless gaming headphone, a wireless headset, a smart helmet, or smart/VR goggles.

19. A conductive plane antenna, comprising:

a non-conductive substrate;

a conductive plane coupled to the non-conductive substrate;

wherein the conductive plane includes an open cavity;

wherein the cavity includes a closed end and an open end;

a first feed point coupled to the conductive plane and configured to pass a first polarity of a set of electromagnetic signals; and

a second feed point coupled to the conductive plane and configured to pass a second polarity of the set of electromagnetic signals;

wherein the conductive plane is configured to generate a first antenna gain pattern in response to the first and second polarity signals;

wherein the cavity is configured to generate a second antenna gain pattern in response to the first and second polarity signals;

wherein a magnitude of the first antenna gain pattern is greater than a magnitude of the second antenna gain pattern;

further comprising a set of electrical circuits or components on a same side of the substrate as the conductive plane; and

wherein the conductive plane surrounds the electrical circuits or components.

20. A conductive plane antenna, comprising:

a non-conductive substrate;

a conductive plane coupled to the non-conductive substrate;

wherein the conductive plane includes an open cavity;

wherein the cavity includes a closed end and an open end;

a first feed point coupled to the conductive plane and configured to pass a first polarity of a set of electromagnetic signals; and

a second feed point coupled to the conductive plane and configured to pass a second polarity of the set of electromagnetic signals;

wherein the conductive plane is configured to generate a first antenna gain pattern in response to the first and second polarity signals;

wherein the cavity is configured to generate a second antenna gain pattern in response to the first and second polarity signals; and

wherein a magnitude of the first antenna gain pattern is greater than a magnitude of the second antenna gain pattern;

further comprising a conducting reflector on one side of the conductive plane;

wherein the reflector includes a non-conductive cavity aligned with the open cavity in the conductive plane.