Magnetic communication link with diversity antennas
AssigneeMicrosoft Corporation
InventorJames Turner
Life of this patent
Estimating the term…
Abstract
To adjust operating characteristics of a first antenna and a second antenna to receive a magnetic signals transmitted by a third antenna, a first magnetic signal from the first antenna. The first magnetic signal is received at the third antenna. A second magnetic signal is transmitted from the second antenna. The second magnetic signal is received at the third antenna. A gain of the first antenna is adjusted in response to an indication of signal quality of the first magnetic signal received at the third antenna. A gain of the second antenna is also adjusted in response to an indication of signal quality of the second magnetic signal received at the third antenna.
Claims20
A system for receiving magnetic communication comprising:
- a first antenna configured to receive a first magnetic signal;
- a second antenna configured to receive the first magnetic signal, wherein the second antenna is oriented at an angle to the first antenna;
- and
- a first control unit adapted to adjust a first receive gain of the first antenna and a second receive gain of the second antenna in response to an indication of signal quality detected at one of:
- the first antenna;
- the second antenna;
- and
- the first antenna and the second antenna.
A method of adjusting operating characteristics of a first antenna and a second antenna to receive magnetic signals transmitted by a third antenna, comprising:
- transmitting a first magnetic signal from the first antenna;
- receiving the first magnetic signal at the third antenna;
- transmitting a second magnetic signal from the second antenna;
- receiving the second magnetic signal at the third antenna;
- adjusting a gain of the first antenna in response to an indication of signal quality of the first magnetic signal received at the third antenna;
- and
- adjusting a gain of the second antenna in response to an indication of signal quality of the second magnetic signal received at the third antenna.
A method of using a first antenna to communicate a magnetic signal, the method comprising:
- providing a variable capacitor coupled to a first antenna;
- applying a signal to the first antenna;
- measuring a resulting voltage across the first antenna;
- adjusting the variable capacitor to maximize the resulting voltage across the first antenna;
- and
- communicating the magnetic signal with the antenna.
Dependencies are inferred from the claim text.