Magnetic-field generating circuit for a tracking system

An apparatus, comprising:

• a signal generator, configured to supply a signal having both a first dominant frequency and a second dominant frequency;
• and
• an electric circuit, comprising a reactive component, configured to generate, upon the signal being supplied to the electric circuit, a magnetic field having both the first dominant frequency and the second dominant frequency, by virtue of the reactive component simultaneously resonating at both the first dominant frequency and the second dominant frequency,
• wherein a difference between the first dominant frequency and the second dominant frequency is at least 5 kHz, and
• wherein the first dominant frequency is less than 5 kHz, and the second dominant frequency is greater than 15 kHz.

An apparatus, comprising:

• a signal generator, configured to supply a signal having both a first dominant frequency and a second dominant frequency;
• and
• an electric circuit, comprising a reactive component, configured to generate, upon the signal being supplied to the electric circuit, a magnetic field having both the first dominant frequency and the second dominant frequency, by virtue of the reactive component simultaneously resonating at both the first dominant frequency and the second dominant frequency,
• at least one first sensor, configured to generate a first signal in response to sensing the magnetic field at the first dominant frequency;
• and
• at least one second sensor, configured to generate a second signal in response to sensing the magnetic field at the second dominant frequency, and
• an intrabody tool comprising the first sensor.

A method, comprising the steps of:

• using a signal generator, supplying, to an electric circuit that includes a reactive component, a signal having both a first dominant frequency and a second dominant frequency;
• using the electric circuit, generating, upon the signal being supplied to the electric circuit, a magnetic field having both the first dominant frequency and the second dominant frequency, by virtue of the reactive component simultaneously resonating at both the first dominant frequency and the second dominant frequency;
• using at least one first sensor, generating a first signal in response to sensing the magnetic field at the first dominant frequency;
• using at least one second sensor, generating a second signal in response to sensing the magnetic field at the second dominant frequency;
• and
• in response to the first signal and the second signal, ascertaining respective locations of the first sensor and the second sensor.

A method, comprising the steps of:

• using a signal generator, supplying, to an electric circuit that includes a reactive component, a signal having both a first dominant frequency and a second dominant frequency;
• using the electric circuit, generating, upon the signal being supplied to the electric circuit, a magnetic field having both the first dominant frequency and the second dominant frequency, by virtue of the reactive component simultaneously resonating at both the first dominant frequency and the second dominant frequency;
• wherein a difference between the first dominant frequency and the second dominant frequency is at least 5 kHz, and
• wherein the first dominant frequency is less than 5 kHz, and the second dominant frequency is greater than 15 kHz.