Antenna system and method for operating an antenna

Patent metadata

Field	Value
Publication number	US-11955729-B2
Application number	US-202217705221-A
Country	US
Kind code	B2
Filing date	Mar 25, 2022
Priority date	Mar 25, 2022
Publication date	Apr 9, 2024
Grant date	Apr 9, 2024

Abstract

Embodiments of an antenna system and a method for operating an antenna are disclosed. In an embodiment, an antenna system includes a first ferrite element, a second ferrite element, a first coil wrapped around the first ferrite element, a second coil wrapped around the second ferrite element, a first antenna interface electrically coupled to the first coil, a second antenna interface electrically coupled to the second coil, and a conductor network connected between the first coil, the second coil, the first antenna interface, and the second antenna interface.

First claim

What is claimed is:

1. An antenna system comprising:
a first ferrite rod;
a second ferrite rod aligned end-to-end along an axis with the first ferrite rod;
a first coil wrapped around the first ferrite rod;
a second coil wrapped around the second ferrite rod;
a conductor network connected between the first coil and the second coil; and
a transmitter coupled to provide a first current to the first coil and a second current to the second coil via the conductor network, wherein a first radio frequency (RF) field is generated in the first coil by the transmitter and a second RF field is generated in the second coil by the transmitter, the first and second RF fields being emitted in opposition to each other creating an increased field strength perpendicular to the axis between the first and second coils.

2. The antenna system of claim 1 ,
wherein the conductor network includes:
a first node that connects an inner end of the first coil and an inner end of the second coil; and
a second node that connects an outer end of the first coil and an outer end of the second coil.

3. The antenna system of claim 1 ,
wherein the conductor network includes:
a first node that connects an outer end of the first coil and an inner end of the second coil; and
a second node that connects an inner end of the first coil and an outer end of the second coil.

4. The antenna system of claim 1 , wherein the first ferrite rod and the second ferrite rod are angled between 0 and 45 degrees relative to the axis.

5. The antenna system of claim 1 , wherein:
a first current is provided to the first coil;
a second current is provided to the second coil; and
wherein the first current and the second current flow in opposite directions.

6. The antenna system of claim 1 , wherein:
a first current is provided to the first coil;
a second current is provided to the second coil; and
wherein the first current and the second current flow in the same direction.

7. A system comprising:
an antenna system including:
a first elongated ferrite element;
a second elongated ferrite element aligned end-to-end in a same axis with the first elongated ferrite element;
a first coil wrapped around the first elongated ferrite element;
a second coil wrapped around the second elongated ferrite element;
a conductor network connected between the first coil and the second coil; and

a transmit circuit connected to the conductor network, wherein the transmit circuit is configured to provide a first current to the first coil and a second current to the second coil, wherein a first radio frequency (RF) field is generated in the first coil by the transmit circuit and a second RF field is generated in the second coil by the transmitter, the first and second RF fields being emitted in opposition to each other creating an increased field strength perpendicular to the axis between the first and second coils.

8. The system of claim 7 ,
wherein the conductor network includes:
a first node that connects an inner end of the first coil and an inner end of the second coil; and
a second node that connects an outer end of the first coil and an outer end of the second coil.

9. The system of claim 7 ,
wherein the conductor network includes:
a first node that connects an outer end of the first coil and an inner end of the second coil; and
a second node that connects an inner end of the first coil and an outer end of the second coil.

10. The system of claim 7 , wherein the first elongated ferrite element and the second elongated ferrite element are angled between 0 and 45 degrees relative to the axis.

11. The system of claim 7 , wherein the first current and the second current flow in opposite directions.

12. The system of claim 7 , wherein the first current and the second current flow in the same direction.

13. A method for operating an antenna system, the method comprising:
providing a first current to a conductor network via a first antenna interface;
providing a second current to the conductor network via a second antenna interface; and
wherein the conductor network electrically connects the first and second antenna interfaces to a first coil wrapped around a first ferrite element and to a second coil wrapped around a second ferrite element, wherein the first and second ferrite elements are aligned end-to-end in a same axis, wherein a first radio frequency (RF) field is generated in the first coil by the transmit circuit and a second RF field is generated in the second coil by the transmitter, the first and second RF fields being emitted in opposition to each other creating an increased field strength perpendicular to the axis between the first and second first and second coils.

Assignees

• Nxp Bv

Inventors

• Kronschläger Oliver
• Knabl David
• Merl Andreas
• Stark Michael
• Merlin Erich

Classifications

• H04B5/266

  One coil at each side, e.g. with primary and secondary coils · CPC title

• H04B5/263

  Multiple coils at either side · CPC title

• H01Q7/08 Primary

  Ferrite rod or like elongated core · CPC title

• H04B5/26 Primary

  using coils · CPC title

• H04B5/79

  for data transfer in combination with power transfer · CPC title