Frequency hopping RF reception system with programmable antenna and methods for use therewith

• US 8,064,495 B2
• Filed: 10/11/2010
• Issued: 11/22/2011
• Est. Priority Date: 09/22/2006
• Status: Expired due to Fees

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza (Reza)
• Primary Examiner(s): HA, DAC V
• Application Number:
  US12/901,874
• Publication Number:
  US 20110026565A1
• Time in Patent Office: 407 Days
• Field of Search: 375/132, 375/133, 375/136, 375/316, 375/340, 375/343, 343/725, 343/745, 343/750, 343/757, 343/822, 343/860, 343/861, 455/130, 455/131, 455/150.1, 455/151.2, 455/151.4, 455/154.1, 455/174.1, 455/175.1, 455/182.1, 455/192.1
• US Class Current: 375/136
• CPC Class Codes: H01Q 1/2208 associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems methods or arrangements for sensing record carriers, e.g. for reading patterns G06K7/00; record carrier for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: H01Q 3/22 varying the orientation in accordance with variation of frequency of radiated wave
• CPC Class Codes: H04B 1/7143 Arrangements for generation of hop patterns
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A (radio frequency) RF reception system includes an RF receiver that demodulates an RF signal at a sequence of selected carrier frequencies. A frequency hop module, coupled to the RF receiver generates the sequence of selected carrier frequencies. A programmable antenna is tuned to each of the sequence of selected carrier frequencies to receive the RF signal via an antenna current.

Claims

1. A (radio frequency) RF reception system comprising:

a frequency hop module that generates a sequence of selected carrier frequencies;

a programmable antenna, coupled to the frequency hop module, that is tuned to each of the sequence of selected carrier frequencies and that receives an RF signal having the sequence of selected carrier frequencies via an antenna current, wherein the programmable antenna includes;

a fixed antenna element;

a programmable antenna element, coupled to the fixed antenna element, that is tunable to each of the sequence of selected carrier frequencies in response to at least one antenna control signal;

a control module, coupled to the programmable antenna element, that generates the at least one antenna control signal and generates a plurality of matching network control signals in response to the sequence of selected carrier frequencies; and

a programmable impedance matching network, coupled to the programmable antenna element and the control module, that includes a plurality of adjustable reactive network elements that are tunable in response in response to the corresponding plurality of matching network control signals, to provide a substantially constant load impedance;

an RF receiver, coupled to the frequency hop module and the programmable antenna, that demodulates the RF signal.

2. The RF reception system of claim 1 wherein the control module is further operable to generate the plurality of matching network control signals in response to a selected magnitude adjustment of the antenna current and a selected phase adjustment of the antenna current.

3. The RF reception system of claim 1 wherein the programmable impedance matching network includes an adjustable balun transformer.

4. The RF reception system of claim 1 wherein the programmable impedance matching network includes a plurality of reactive network elements that include the plurality of adjustable reactive network elements.

5. The RF reception system of claim 4 wherein the plurality of reactive network elements are arranged in a pi-network configuration.

6. The RF reception system of claim 4 wherein the plurality of reactive network elements are arranged in a t-network configuration.

7. The RF reception system of claim 4 wherein the plurality of adjustable reactive network elements each include a plurality of fixed reactive network elements and a switching network for selectively coupling the plurality of fixed reactive network elements in response to at least one of the plurality of matching network control signals.

8. The RF reception system of claim 7 wherein the switching network selects at least one of the plurality of fixed reactive network elements and that deselects the remaining ones of the plurality of fixed reactive network elements in response to at least one of the plurality of matching network control signals.

9. A (radio frequency) RF reception system comprising:

a frequency hop module that generates a sequence of selected carrier frequencies;

a programmable antenna, coupled to the frequency hop module, that is tuned to each of the sequence of selected carrier frequencies and that receives an RF signal having the sequence of selected carrier frequencies via an antenna current wherein the programmable antenna includes;

a control module, coupled to the programmable antenna element, that generates a plurality of matching network control signals in response to the sequence of selected carrier frequencies; and

a programmable impedance matching network, coupled to the programmable antenna element and the control module, that includes a plurality of adjustable reactive network elements that are tunable in response in response to the corresponding plurality of matching network control signals, to provide a substantially constant load impedance; and

an RF receiver, coupled to the frequency hop module and the programmable antenna, that demodulates the RF signal.

10. The RF reception system of claim 9 wherein the control module is further operable to generate the plurality of matching network control signals in response to a selected magnitude adjustment of the antenna current and a selected phase adjustment of the antenna current.

11. The RF reception system of claim 9 wherein the programmable impedance matching network includes an adjustable balun transformer.

12. The RF reception system of claim 9 wherein the programmable impedance matching network includes a plurality of reactive network elements that include the plurality of adjustable reactive network elements.

13. The RF reception system of claim 12 wherein the plurality of reactive network elements are arranged in a pi-network configuration.

14. The RF reception system of claim 12 wherein the plurality of reactive network elements are arranged in a t-network configuration.

15. The RF reception system of claim 12 wherein the plurality of adjustable reactive network elements each include a plurality of fixed reactive network elements and a switching network for selectively coupling the plurality of fixed reactive network elements in response to at least one of the plurality of matching network control signals.

16. The RF reception system of claim 15 wherein the switching network selects at least one of the plurality of fixed reactive network elements and that deselects the remaining ones of the plurality of fixed reactive network elements in response to at least one of the plurality of matching network control signals.