Resonant circuit tuning system with dynamic impedance matching

1. A resonant circuit tuning system comprising:

a resonant circuit having a first capacitive element in series between a transmitter and an antenna coil and a second capacitive element in parallel with the transmitter and the antenna coil, at least one of the first capacitive element and second capacitive element configured to be varied;

a controller for controlling a variable value of at least one of the first and second capacitive elements; and

a variable inductive element connected in one of (i) a series arrangement with the antenna and (ii) magnetically coupled to the antenna.

2. A resonant circuit tuning system in accordance with claim 1 wherein the controller is configured to control at least one of the variable capacitive element and variable inductive element to adjust at least one of a resonant frequency and a resonant impedance of the resonant circuit.

3. A resonant circuit tuning system in accordance with claim 1 wherein the resonant circuit is configured in one of a series and a parallel arrangement.

4. A resonant circuit tuning system in accordance with claim 1 wherein the controller is configured to dynamically adjust at least one of the first capacitive element and second capacitive element based on a sensed current.

5. A resonant circuit tuning system in accordance with claim 1 wherein at least one of the first capacitive element and second capacitive element comprises a variable capacitor and the controller is configured to adjust a capacitance ratio.

6. A resonant circuit tuning system in accordance with claim 1 wherein the resonant circuit is configured to operate in connection with at least one of an Electronic Article Surveillance (EAS) system and a Radio Frequency Identification (RFID) system.