Antenna method and apparatus

• US 7,126,929 B2
• Filed: 12/26/2002
• Issued: 10/24/2006
• Est. Priority Date: 12/26/2002
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Jasper, Steven C., Turney, William J.
• Primary Examiner(s): Patel, Ajit
• Application Number:
  US10/329,746
• Publication Number:
  US 20040136341A1
• Time in Patent Office: 1,398 Days
• Field of Search: 370/201, 370/276, 370/277, 370/282, 370/278, 370/334, 455/561, 455/562.1, 455/132, 455/272, 455/137, 455/101, 455/133, 455/134, 455/135, 455/273, 455/277.1, 455/277.2
• US Class Current: 370/334
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence

Abstract

A wireless communication unit provides (10) a first signal as received from a first portion (11) of a single antenna and provides (13) a second signal as received from a second portion of the antenna, which in a preferred embodiment can comprise a feedline (12). The two signals contain information that is cross-coupled with respect to one another as a function, at least in part, of the structure of the antenna. A digital processing platform (34) de-couples (17) these signals to permit recovery of the original payloads. In one embodiment similar approaches are used to facilitate cross-coupling of signals and transmission of such cross-coupled signals from different portions of a single antenna structure. In another embodiment, both transmission and reception are facilitated by a common platform.

Claims

1. A method for use with an antenna, comprising:

within a digital processing platform;

providing a first payload signal that corresponds to energy received at a first part of the antenna;

providing a second payload signal that corresponds to energy received at a second part of the antenna, which second part is at least partially different from the first part of the antenna and wherein the second payload signal is at least partially cross-coupled with the first payload signal at least as a function of structure of the antenna;

substantially decoupling the first payload signal from the second payload signal.

2. The method of claim 1 wherein the antenna comprises a dipole portion and a feed line, and wherein the dipole portion comprises the first part of the antenna and the feed line comprises the second part of the antenna.

3. The method of claim 1 and further comprising:

down converting the energy received at the first part of the antenna with another signal to facilitate provision of the first payload signal;

down converting the energy received at the second part of the antenna with another signal to facilitate provision of the second payload signal.

4. The method of claim 3 wherein:

down converting the energy received at the first part of the antenna with another signal to provide the first payload signal and down converting the energy received at the second part of the antenna with another signal includes providing the another signal from a local oscillator.

5. The method of claim 1 and further comprising:

down converting the energy received at the first part of the antenna and the energy received at the second part of the antenna to at least a first and second intermediate signal, respectively;

converting the at least a first and second intermediate signal to a first and second digital representation, respectively;

providing the first and second digital representation to the digital processing platform.

6. The method of claim 5, and further comprising:

within the digital processing platform;

recovering the first payload signal from the first digital representation;

recovering the second payload signal from the second digital representation.

7. The method of claim 1 and further comprising:

passing at least a portion of the energy received at the first part of the antenna through a first duplexer;

passing at least a portion of the energy received at the second part of the antenna through a second duplexer.

8. The method of claim 7 and further comprising:

within the digital processing platform;

providing a first and second outbound payload signal;

cross-coupling the first and second outbound payload signal to thereby provide a first output signal that corresponds to a sum of the first and second payload signal to the first duplexer and a second output signal that corresponds to a difference between the first and second payload signal to the second duplexer.

9. The method of claim 8 wherein the digital processing platform includes a digital cross-coupled sum and difference engine and wherein cross-coupling is achieved through use of the digital cross-coupled sum and difference engine.

10. The method of claim 9 wherein the antenna comprises a part of a time division duplex communication system.

11. The method of claim 8 wherein the digital cross-coupled sum and difference engine is different that the second digital cross-coupled sum and difference engine.

12. The method of claim 11 wherein the antenna comprises a part of a frequency division duplex communication system.

13. The method of claim 7 and further comprising:

providing an outgoing payload signal;

coupling the outgoing payload signal to both the first duplexer and the second duplexer.

14. An apparatus comprising:

an antenna having at least two signal inputs/outputs;

a digital processing platform having an input operably coupled to the at least two signal inputs/outputs, wherein the digital processing platform has at least a first mode of operation comprising;

summing a first signal that corresponds to energy received at a first part of the antenna with a second signal that corresponds to energy received at a second part of the antenna, wherein the second part is at least partially different than the first part, to provide a summed signal;

determining a difference between the first signal and the second signal to provide a difference signal.

15. The apparatus of claim 14 wherein the antenna comprises a dipole portion and a feed line, wherein the dipole portion comprises the first part of the antenna and the feed line comprises the second part of the antenna.

16. The apparatus of claim 14 and further comprising:

down converting means for down converting the energy received at the first and second parts of the antenna to facilitate provision of the first and second signal.

17. The apparatus of claim 16 and further comprising at least one local oscillator that is operably coupled to the down converting means.

18. The apparatus of claim 16 wherein the down converting means is at least partially external to the digital processing platform.

19. The apparatus of claim 14 wherein the digital processing platform has at least a second mode of operation comprising:

using the summed signal and the difference signal to recover an original payload signal as transmitted to the apparatus.

20. The apparatus of claim 19 wherein the original payload signal includes at least two discrete payloads.

21. The apparatus of claim 14 and further comprising:

a first duplexer coupled between the input of the digital processing platform and an output of the antenna that outputs the energy received at the first part of the antenna; and

a second duplexer coupled between the input of the digital processing platform and an output of the antenna that outputs the energy received at the first part of the antenna.

22. The apparatus of claim 14 wherein the digital processing platform comprises cross-coupled sum and difference means for receiving the first and second signal and for providing:

a first output that corresponds to a sum of the first and second signals; and

a second output that corresponds to a difference between the first and second signals.

23. A wireless communication device comprising:

antenna means for at least one of receiving and transmitting a wireless signal;

digital cross-coupled sum and difference means operably coupled to the antenna means for at least one of;

summing a first signal that corresponds to energy received at a first part of the antenna means with a second signal that corresponds to energy received at a second part of the antenna means, wherein the second part is at least partially different than the first part, to provide a summed signal;

determining a difference between the first signal and the second signal to provide a difference signal; and

summing a first outgoing payload signal with a second outgoing payload signal to provide a summed signal and providing the summed signal to be transmitted from a first part of the antenna means;

determining a difference between the first outgoing payload signal and the second outgoing payload signal to provide a difference signal to be transmitted from a second part of the antenna means, which second part is different from the first part.