Motorola Corporation

Motorola Mobility LLC

Roger L Scheer

Eric LeRoy Krenz

James P Phillips

Rachid M Alameh

Zili Li

Istvan Janos Szini

Rudy Michael Emrick

Paul J Moller

Andrew A Efanov

Christopher P Cash

Paul W Reich

Zhengfang Qian

Boris Rubinshteyn

Narenda Pulimi

Matthew Richard Brown

Jeffrey Y Ho

Michael S Kramer

Embodiments include antenna tuning systems and methods of tuning an antenna of a wireless device with an antenna, a circuit with at least one tunable component, and a processing system. The processing system determines tuning selection inputs during a communication session. Based on the tuning selection inputs, the processing system determines one or more component values for one or more tunable components. In an embodiment, the component value(s) are determined from a set of pre-defined component values. The tunable component(s) are controlled to have the determined component value(s). The circuit may be an impedance matching circuit that includes at least one tunable reactive component. Alternatively, the circuit may be an antenna tuning circuit that includes at least one variable component. In an embodiment, both an impedance matching circuit and an antenna tuning circuit may be implemented, with each type of circuit having one or more tunable components.

Adaptive antenna tuning systems and methods

Antennas () or other radio frequency components that include an electrically configurable anisotropic element () are provided. According to certain embodiments the electrical configurable anisotropic element () includes a material () including carbon nanotubes or conductive nano-tubes or nano-wires () dispersed in a liquid crystal material or other medium with that can be aligned by an applied field.

Radio frequency system component with configurable anisotropic element

A model hand () for use in electromagnetic testing comprising a body () and at least one digit () extending from a side of the body. For one embodiment, the body () has an outer semi-cylinder surface () with an arcuate shape and an inner semi-cylinder surface () following the arcuate shape of the outer semi-cylinder surface. A digit () is coupled at a base end () coupled to the side () of the cylindrical body () to permit pivotal motion of the digit relative to the cylindrical body. For another embodiment, the body () has a palm-like shape with four static digits (-) affixed at one end to the palm-shaped body. In addition to the four static digits (-), a dynamic digit () extends from the body () and couples to the body to permit pivotal motion of the digit relative to the body.

Model hand for electromagnetic testing

An electronically tunable planar antenna, a wireless communication device, and a method of tuning an antennain which a high band elementand a low band elementeach have a resonant center frequency. At any given time, the antennahas two center resonant frequencies and thus allows the device to operate at two frequencies simultaneously. In addition, tuning circuitsare connected to the low band elementand the high band element, respectively. The tuning circuitselectronically change the resonant center frequency of the corresponding element. Accordingly, in the devicethe method, and the antenna one or both of the center frequencies can be changed to permit operation at more than two frequencies.

Electronically tunable planar antenna and method of tuning the same

A multi-band radio communication device with an antenna system that includes an antenna element and a parasitic element located in proximity to the antenna element. A tuning circuit is coupled to the parasitic element. The tuning circuit is variable to adjust the parasitic load on the antenna element to provide variable operating frequencies and bandwidths for the communication device.

Antenna with variably tuned parasitic element

An adaptive antenna system having a counterpoise conductor contained within a housing of a communication device and located distally from such surfaces of the housing that can be held by or placed in proximity to a user or external objects which detune the counterpoise. A tuning circuit is coupled between the counterpoise conductor and a ground. The tuning circuit is operable to adapt the resonant frequency of the counterpoise conductor to divert operational RF currents away from the ground located in proximity the user or external objects and onto the counterpoise conductor.

Sensor-driven adaptive counterpoise antenna system

Growing community of inventors

Crystal Lake, IL, United States of America

Roger L Scheer