Quantenna Communications, Inc.

Finisar Corporation

On Semiconductor Connectivity Solutions, Inc.

Saied Ansari

Didier Margairaz

Abhishek Kumar Agrawal

Simon Duxbury

Hongping Liu

Behrooz Rezvani

Jiashu Chen

Ricardo Saad

A multiple-input multiple-output (MIMO) wireless transceiver with 'N' transmit and receive chains and a bandwidth evaluation circuit, a chain partitioning circuit and a switchable radio frequency 'RF' filter bank. The bandwidth evaluation circuit evaluates both the utilization of the WLAN(s) and any remaining communications channels and determines whether to operate the MIMO chains synchronously as a single radio or asynchronously as multiple radios. The chain partitioning circuit either partitions subsets of the MIMO chains for asynchronous operation as distinct radios or combines all MIMO chains for synchronous operation as a single radio. The switchable RF filter bank is responsive to a partitioning of subsets of the chains into distinct radios to add RF filters to a RF portion of the chains to isolate each radio from one another, and responsive to a combining of all MIMO chains into a single radio to remove all RF filters.

Transmutable MIMO wireless transceiver

A transceiver comprising a plurality of components coupled to one another to form a transmit path and a receive path and a balun. The balun comprises a primary inductor, two pairs of secondary inductors and switched impedance modules. The primary inductor is configured to couple to the communications medium at an unbalanced port end. The two pairs of secondary inductors are each configured to electromagnetically couple with the primary inductor and each providing an associated one of two balanced, ports coupled to components forming the transmit path and the receive path. The switched impedance modules are each coupled to a corresponding one of the two pairs of secondary inductors to switchably split into a virtual open, one pair of secondary inductors associated with an inactive, one of the balanced ports and to couple another pair of secondary inductors associated with an active one of the balanced ports either to each other or to a virtual ground.

Method and apparatus for integrating a transceiver and a half-duplexing split balun

A technique for tuning an antenna may include one or more of the following: working against a ground plane, utilizing the third dimension by alternating layers on a substrate, integrating an inductive short stub in the substrate to improve port matching, and making a tuning port available for capacitive loading and resonance modification.

Tunable antenna system

Systems and methods for controlling a thermoelectric cooler (TEC) in an optical transceiver. A TEC system includes a processor that interacts with a power supply and a TEC controller to prevent inrush current. The power supply is switched by the processor and turned on only at a particular time. The power supply has a relatively large time constant such that it ramps slowly to its full value. In the meantime, the processor and TEC controller cause the temperature to ramp to a target value by repeatedly incrementing or decrementing a target value over time and by controlling when the maximum available voltage can be applied to the TEC.

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Oakland, CA, United States of America

Saied Ansari