Portable electronic communications device with human tissue contact detection

1. An electronic communications device, comprising:

a radio frequency (RF) transceiver;

an RF antenna having dielectric-object proximity-sensing capability;

a millimeter wave (mmW) antenna; and

a processor that is:

a) coupled to the RF antenna to receive capacitance variation signals from the RF antenna;

b) coupled to the mmW antenna to receive distance-to-object signals from the mmW antenna; and

c) coupled to the RF transceiver to produce power reduction signals to the RF transceiver;

wherein the processor time stamps the capacitance variation signals and the distance-to-object signals,

wherein the processor combines the time-stamped capacitance variation signals with the time-stamped distance-to-object signals to distinguish proximity of an inanimate object from proximity of a human tissue object,

wherein the processor sends the power reduction signals responsively to the time-stamped capacitance variation signals and the time-stamped distance-to-object signals only when the object is human tissue.

2. The device of claim 1 wherein the processor includes a non-volatile memory with a stored relationship between the capacitance variation resulting from proximity to the human tissue object and distance of the human tissue object from the mmW antenna.

3. The device of claim 2 wherein the relationship is stored in a look-up table.

4. The device of claim 1 wherein the RF antenna is a multiple element antenna.

5. The device of claim 1 wherein the RF antenna and the mmW antenna are in contact with one another.

6. The device of claim 1 wherein the RF antenna and the mmW antenna are coupled with one another.

7. The device of claim 1 wherein the RF antenna and the mmW antenna are separated from one another.

8. An antenna system for a portable electronic communications device, comprising:

an RF antenna having dielectric-object proximity-sensing capability;

a millimeter wave (mmW) antenna;

wherein the RF antenna and the mmW antenna are coupled to a processor; and

wherein both the RF antenna the mmW antenna provide signals to the processor which signals are indicative of proximity of an object with a high dielectric constant;

wherein the processor time stamps the signals from the RF antenna and the mmW antenna; and

wherein the processor combines the time-stamped signals from the RF antenna and the mmW antenna to distinguish proximity of an inanimate object from proximity of a human tissue object; and

wherein the processor produces an RF power reduction signal responsively to signals which are indicative of proximity of human tissue object within a predetermined distance from the RF antenna.

9. A method for controlling power output from an electronic communication device, comprising the steps of:

generating object-proximity signals by sensing proximity of an object with a proximity sensing RF antenna;

generating distance-to-object signals with a millimeter wave (mmW) antenna;

sending the object-proximity and the distance-to-object signals to a processor;

time stamping the object-proximity and the distance-to-object signals in the processor;

combining, in the processor, the time-stamped object-proximity and the distance-to-object signals to distinguish proximity of an inanimate object from proximity of a human tissue object; and

reducing RF power output from the electronic communication device responsively to the signals by a dynamic power reduction signal from the processor only when the object is human tissue.

10. The method of claim 9 wherein the step of reducing RF power output from the electronic communication device further comprises the step of sending the power reduction signal from the processor to a transceiver of the electronic device.

11. The method of claim 9 wherein the step of combining further comprises:

selecting one of the stamped times;

selecting the one of the object-proximity signals with the selected time stamp;

selecting the one of the distance-to-object signals with the selected time stamp; and

comparing the selected time stamped object-proximity signal and the selected time stamped distance-to-object signal to predetermined values for said signals, which predetermined values are stored in a non-volatile memory of the processor.

12. The method of claim 11 wherein the predetermined values are stored in a look-up table.