Google Inc.

Motorola Corporation

Motorola Mobility LLC

Richard E Mach

Gregory Redmond Black

William Paul Alberth, Jr

Louis Jay Vannatta

Christopher N Kurby

David Ryan Haub

Armin Werner Klomsdorf

Dale Gerard Schwent

In one example, a wireless communication device adapted for multi-band operation includes a first antenna, a first diplexer configured to pass signals within first and second sets of frequency bands, first and second signal paths, wherein each signal path includes a set of notch filters tunable to attenuate a different frequency. The wireless communication device includes a second antenna, a second diplexer configured to pass the first and second frequency bands, third and fourth signal paths, wherein each of the third and fourth signal paths includes one or more notch filters tunable to attenuate a different frequency, and a transceiver coupled to each signal path.

Method and apparatus for tuning a communication device for multi band operation

A transceiver module and duplexer within a communication device supports a minimized antenna volume and enhances a transfer gain for transmit and receive channels. The duplexer is communicatively coupled to one of multiple antenna and filter matching configurations which include a first configuration that couples receive and transmit filter matching circuits to a single antenna matching circuit. When the duplexer is coupled to the first configuration, receive and transmit filters of the duplexer are respectively coupled to the receive filter matching circuit and the transmit filter matching circuit. As a result, the antenna matching circuit and the filter matching circuits collectively provide the enhanced transfer gain. The duplexer is placed within an integrated circuit (IC) package to provide a duplexer IC having a specific number of input/output (I/O) pins arranged in a pre-established I/O pin mapping to maintain duplexer functionality and provide compatibility with various antenna and filter matching configurations.

Duplex filter arrangements for use with tunable narrow band antennas having forward and backward compatibility

A method () and devices for enhancing the performance of one or more antennas () is provided. A control circuit () assesses performance of an antenna () in a plurality of bands, such as a receive band and a transmit band. The control circuit () then selects one of the bands, e.g., a lesser performing band, as a 'selected band' for which the antenna () will be optimized. The control circuit () can then adjust an adjustable impedance matching circuit () coupled to the antenna () to improve the efficiency of the antenna () in the selected band and can adjust a resonance of the antenna () to further improve an efficiency of the antenna () in the selected band.

System and methods for adaptive antenna optimization

A tunable resonator is provided that has a high Q for each resonate frequency. The tunable resonator is a MEMs tunable resonator wherein the tuner is affected by moving a moveable mass, associated with the resonating portion of the resonator, form a first position to a second position such that the moveable mass is held in the first position or second position by a detent rather than a constant electromagnet magnetic or electrostatic force applied thereon.

Microelectronic machine-based ariable

A multimode wireless receiver circuit () includes multi-receiver control and interference detection logic () and least two separate receivers: a first receiver () associated with a first radio access technology and a second receiver () associated with a second radio access technology. The multi-receiver control and interference detection logic () simultaneously controls the second receiver () to detect an interference blocker signal (), while the first receiver () receives at least a portion of the wireless signal () and the interference product signal (). In response to the second receiver () detecting the interference blocker signal (), the multi-receiver control and interference detection logic () adjusts at least one operating condition of the first receiver () such that the interference product signal () received by the first receiver () is reduced.

Multimode receiver and method for controlling signal interference

A method to reduce crossmodulation in a multimode radio communication device with a transmitter, a receiver, and a second receiver () that operates in a receiver channel bandwidth () includes a step of measuring a first signal strength in the receiver channel bandwidth (), a second signal strength outside of the receiver channel bandwidth (), and a power level of the transmitter. A next step () includes determining a signal-to-crossmodulation interference ratio (SCMIR). A next step () includes calculating a SCMIR threshold. A next step () includes comparing the ratio to the threshold. A next step () includes increasing the linearity of the receiver if the ratio is less than the threshold.

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Cary, IL, United States of America

Richard E Mach