Octoscope Inc.

Bose Corporation

Auriga Measurement Systems, LLC

James Sozanski

Robert Preston Parker

Yusuke Tajima

Ron Cook

Mark A Royer

Wenjian Gu

Ted Grosch

The present disclosure is directed to systems and methods for operating, designing, testing and verifying the performance of wireless communication devices. Specifically, the present systems and methods can passively attenuate unwanted electromagnetic interference (EMI) without degrading signal quality of predetermined frequency using a novel versatile module including a RF absorbing material in a composite medium surrounding the conducting signal lines. Utilizing varying permeability media, the present invention offer a robust platform to eliminate unwanted noise while maintaining a desirable control and power interfaces used for testing of wireless communication systems.

Composite electromagnetic isolation filters

A multipath channel emulation system and method are disclosed. In some aspects, the system and method allow for analog emulation of a multipath MIMO wireless channel. Such multipath channel emulation system is used for testing the ability of wireless communication devices to operate in an airlink channel characterized by multipath. In a particular aspect, an impedance mismatch or discontinuity is provided in an open-ended coaxial cable so as to cause multiple back and forth reflections between an impedance discontinuity and an open coaxial cable stub and, optionally, including a delay element to emulate a multi-cluster multipath environment. A plurality of such stub subsystems may be combined as sub-paths in a multipath channel emulator.

Radio frequency multipath channel emulation system and method

A power supply stage includes a digital signal generation means to generate n bit digital signal, a selection means for power supply voltages in dependence on n bit digital signal and an adjusting means for receiving the selected power supply voltage and the envelope signal and adapted to generate an adjusted selected power supply voltage tracking the envelope signal.

RF amplifier modulation circuit and related techniques

An electrical transformer having a core with two core portions having a shield for electrically shielding one core portion from the other core portion.

Growing community of inventors

Bolton, MA, United States of America

James Sozanski