Impedance Tuning of Transmitting and Receiving Antennas

• US 20100302106A1
• Filed: 05/29/2009
• Published: 12/02/2010
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Infineon Technologies AG
• Inventors: Mueller, Jan-Erik, Knudsen, Mikael Bergholz, Bundgaard, Peter, Pelosi, Mauro, Pedersen, Gert F.
• Granted Patent: US 8,232,925 B2
• Time in Patent Office: Days
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/241 used in mobile communications, e.g. GSM H01Q1/247, H01Q1/248 take precedence
• CPC Class Codes: H01Q 19/005 Patch antenna using one or more coplanar parasitic elements
• CPC Class Codes: H04B 1/0458 Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages matching circuits in general H03H
• CPC Class Codes: H04B 1/18 Input circuits, e.g. for coupling to an antenna or a transmission line coupling networks between antennas or lines and receivers independent of the nature of the receiver H03H
• CPC Class Codes: H04B 1/40 Circuits

Abstract

The present disclosure relates to impedance tuning of transmitting and receiving antennas.

Claims

1. A device comprising:

a transceiver;

a receiving narrowband antenna;

a transmitting narrowband antenna;

a receiving branch coupled between the transceiver and the receiving narrowband antenna, the receiving branch including a receiving tuning circuit, and wherein the receiving tuning circuit matches an impedance of the receiving narrowband antenna with an impedance of a receiving amplifier;

a transmitting branch coupled between the transceiver and the transmitting narrowband antenna, the transmitting branch including a transmitting tuning circuit, wherein the transmitting tuning circuit matches an impedance of the transmitting narrowband antenna with an impedance of a transmitting amplifier.

2. The device of claim 1, wherein the receiving amplifier and the transmitting amplifier are included in the transceiver.

3. The device of claim 1, wherein the receiving amplifier is included in the receiving branch and the transmitting amplifier is included in the transmitting branch.

4. The device of claim 1, wherein the receiving narrowband antenna, the transmitting narrowband antenna, or a combination thereof, are a planar inverted F antenna (PIFA).

5. The device of claim 1, wherein the transmitting narrowband antenna, the receiving narrowband antenna, or a combination thereof, have a building height less than or equal to 1 millimeter.

6. The device of claim 1, wherein the receiving tuning circuit matches impedances of the receiving narrowband antenna with the impedance of a receiving amplifier across a plurality of frequency ranges, wherein each frequency range is associated with a receiving band of a different wireless communication technology.

7. The device of claim 1, wherein the transmitting tuning circuit matches impedances of the transmitting narrowband antenna with the impedance of the transmitting amplifier across a plurality of frequency ranges, wherein each frequency range is associated with a transmitting band of a different wireless communication technology.

8. The device of claim 1, wherein the receiving narrowband antenna includes one or more receiving tuning elements to match an impedance of the receiving narrowband antenna with the impedance of the receiving amplifier.

9. The device of claim 1, wherein the transmitting narrowband antenna includes one or more transmitting tuning elements to match an impedance of the transmitting narrowband antenna with the impedance of the transmitting amplifier.

10. A method comprising:

determining, by a control unit of a wireless communication device, an impedance of a receiving narrowband antenna of the wireless communication device;

determining, by the control unit, an impedance of a receiving amplifier of the wireless communication device; and

sending a control signal from the control unit to a receiving tuning circuit to match the impedance of the receiving narrowband antenna with the impedance of the receiving amplifier.

11. The method of claim 10, wherein the impedance of the receiving narrowband antenna is based on a frequency of signals received via the receiving narrowband antenna.

12. The method of claim 10, wherein the impedance of the receiving narrowband antenna is based on interaction between a user of the wireless communication device and the receiving narrowband antenna.

13. The method of claim 10 further comprising:

determining, by the control unit, an impedance of a transmitting narrowband antenna of the wireless communication device;

determining, by the control unit, an impedance of a transmitting amplifier of the wireless communication device; and

providing a signal from the control unit to a transmitting tuning circuit to match the impedance of the transmitting narrowband antenna to the impedance of the transmitting amplifier.

14. The method of claim 13, wherein a pass band of signals that are transmitted from the transmitting narrowband antenna does not overlap with a pass band of signals that are received via the receiving narrowband antenna.

15. A wireless communication device comprising:

a transceiver configured to transmit signals via a plurality of transmitting frequency bands and to receive signals via a plurality of receiving frequency bands;

a transmitting antenna;

a receiving antenna;

a transmitting branch coupled to the transmitting antenna and the transceiver; and

a receiving branch coupled to the receiving antenna and the transceiver.

16. The wireless communication device of claim 15, wherein the transmitting branch includes a transmitter tuning circuit and the receiving branch includes a receiver tuning circuit.

17. The wireless communication device of claim 16, wherein the transmitter tuning circuit includes a tunable filter, one or more power amplifiers, or a combination thereof.

18. The wireless communication device of claim 16, wherein the receiver tuning circuit includes a tunable filter, one or more low noise amplifiers, or a combination thereof.

19. The wireless communication device of claim 16, wherein at least two of the transmitting frequency bands are associated with different wireless communication technologies.

20. The wireless communication device of claim 16, wherein at least two of the receiving frequency bands are associated with different wireless communication technologies.