Antenna coil tuning mechanism for magnetic communication
First Claim
1. An integrated circuit for a near-field radio, comprising:
- an inductive-capacitive (LC) tank antenna circuit designed to operate at a predetermined carrier frequency, the tank LC tank antenna circuit including a variable capacitor and an antenna element;
a transmitter configured to output a channel sounding signal (CSS) to the LC tank antenna circuit;
a receiver to receive the CSS and a tank response from the LC tank antenna circuit;
a tank response estimator to extract the tank response of the LC tank antenna circuit by removing the CSS from the received signal and determining an oscillation frequency of the LC tank antenna circuit; and
a controller to adjust a reactance of the LC tank antenna circuit to resonate the LC tank antenna circuit and change the oscillation frequency to the predetermined carrier frequency.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is an integrated circuit for a near-field radio, including an inductive-capacitive (LC) tank antenna circuit designed to operate at a predetermined carrier frequency, the tank LC tank antenna circuit including a variable capacitor and an antenna element, a transmitter configured to output a channel sounding signal (CSS) to the LC tank antenna circuit, a receiver to receive the CSS and a tank response from the LC tank antenna circuit, a tank response estimator to extract the tank response of the LC tank antenna circuit by removing the CSS from the received signal and determining an oscillation frequency of the LC tank antenna circuit, and a controller to adjust a reactance of the LC tank antenna circuit to resonate the LC tank antenna circuit and change the oscillation frequency to the predetermined carrier frequency.
-
Citations
20 Claims
-
1. An integrated circuit for a near-field radio, comprising:
-
an inductive-capacitive (LC) tank antenna circuit designed to operate at a predetermined carrier frequency, the tank LC tank antenna circuit including a variable capacitor and an antenna element; a transmitter configured to output a channel sounding signal (CSS) to the LC tank antenna circuit; a receiver to receive the CSS and a tank response from the LC tank antenna circuit; a tank response estimator to extract the tank response of the LC tank antenna circuit by removing the CSS from the received signal and determining an oscillation frequency of the LC tank antenna circuit; and a controller to adjust a reactance of the LC tank antenna circuit to resonate the LC tank antenna circuit and change the oscillation frequency to the predetermined carrier frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of tuning an antenna coil having a predetermined carrier frequency, comprising:
-
sending a single channel sounding signal (CSS) through an inductive-capacitive (LC) tank antenna circuit having inductive and capacitive components to estimate a tank response; receiving a received signal including the CSS and a tank response from the LC tank antenna circuit; extracting the tank response of the LC tank antenna circuit by removing the CSS from the received signal; using the tank response to determine an oscillation frequency of the LC tank antenna circuit; and adjusting a reactance of the LC tank antenna circuit to resonate the LC tank antenna circuit and change the oscillation frequency to at the predetermined carrier frequency. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification