Symbol Technologies, LLC

Sarika Jain

Guangli Yang

Mike Verdecanna

An electronic device includes a main antenna and a diversity antenna. The diversity antenna includes a first portion configured to enable a transceiver to receive a signal in a first low-band frequency of four frequency bands. A second portion enables the transceiver to receive a signal in first and second high-band frequencies. A third portion is RF coupled to the first portion when the third portion is connected to ground. The third portion tunes the first portion such that the transceiver receives a signal in a second low-band frequency. A switch is connected between the third portion and the ground. When the switch is open, the first portion enables the transceiver to receive the signal in the first low-band frequency. When the switch is closed, the third portion tunes the first portion to enable the transceiver to receive the signal in the second low-band frequency.

Quad-band tunable diversity antenna for global applications

Methods and apparatus are provided for adjusting the electromagnetic fields produced by telephones or other mobile devices capable of wireless communication. A wireless communication device includes a substrate having a ground plane. An antenna is coupled to the ground plane, and electrical currents are produced in the ground plane during operation of the antenna. A switchable counterpoise circuit that includes a conducting element and an inductor in series is provided on the substrate. The switchable counterpoise is selectively coupled to the ground plane based upon an operating mode of the wireless communications device, thereby adjusting the electrical currents flowing in the ground plane when the counterpoise is active. The changes in the ground plane currents can produce adjustments in the electromagnetic fields produced by the device, thereby improving hearing aid compatibility (HAC) of the device.

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Vernon Hills, IL, United States of America

Sarika Jain