International Business Machines Corporation

Telefonaktiebolaget Lm Ericsson (publ)

Ericsson Ab

Joakim Hallin

Daniel Joseph Friedman

Alberto Valdes Garcia

Duixian Liu

Bodhisatwa Sadhu

Scott Kevin Reynolds

Leonard Rexberg

Xiaoxiong Gu

Ola Ragnar Tageman

Christian Wilhelmus Baks

Raihan Rafique

Yahya Mesgarpour Tousi

Stefan Sahl

Jan-Erik Thillberg

Dimitar Nikolov

Örjan Renström

Olov Haapalahti

Systems and methods are disclosed for correcting Local Oscillator (LO) phase misalignment between different Radio Frequency Integrated Circuits (RFIC) of an Advanced Antenna System (AAS).

LO phase correction for AAS with multiple RFIC

Antenna package structures are provided to implement wireless communications packages. For example, an antenna package includes multilayer package substrate, a planar antenna array, antenna feed lines, and resistive transmission lines. The planar antenna array includes an array of active antenna elements and dummy antenna elements surrounding the array of active antenna elements. Each active antenna element is coupled to a corresponding one of the antenna feed lines, and each dummy antenna element is coupled to a corresponding one of the resistive transmission lines. Each resistive transmission line extends through the multilayer package substrate and is terminated in a same metallization layer of the multilayer package substrate.

Wireless communications package with integrated antenna array

Lo phase correction for AAS with multiple RFIC

A clock signal polarity controlling circuit comprises a first latch comprising a clock input, a data input and an output. The data input is coupled to an output of a clock signal generator, the clock input is coupled to a reference clock signal. The clock signal polarity controlling circuit further comprises a second latch comprising a clock input, a data input and an output. The data input is coupled to the output of the first latch, the clock input is coupled to the reference clock signal. The circuit further comprises an XOR circuit comprising a first and second inputs and an output. The first and second inputs are coupled to the output of the second latch and the output of the clock signal generator respectively, and a clock signal having a polarity controlled by the reference clock signal is generated at the output of the XOR circuit.

Clock signal polarity controlling circuit

A method and system of a configurable phased array transceiver are provided. A first beamforming unit is configured to provide a first beam. A second beamforming unit is configured to provide a second beam. A first bi-directional power controller is configured to combine or to split the first beam and the second beam. Each beamforming unit comprises a plurality of radio frequency (RF) front-ends, each front-end being configured to transmit and receive RF signals. Each beam is independently configurable to operate in a transmit (TX) or a receive (RX) mode.

Configurable polarimetric phased array transceiver architecture

A mixer circuitry comprises a mixer, a local oscillator (LO) leakage detector, a digital LO leakage cancellation controller and a DAC arrangement. The mixer is configured to mix a first LO signal having an LO frequency fwith an intermediate frequency (IF) signal and generate an output signal, i.e. a wanted signal. The LO leakage detector measures the LO leakage at the output of the mixer in the presence of the wanted signal. Then in the digital LO leakage cancellation controller, a digital algorithm is run that automatically adjusts the LO leakage in the mixer by steering the digital-to-analog converter arrangement such that the intermediate frequency input signal level to the mixer is adjusted.

Local oscillator leakage detecting and cancellation

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Askim, Sweden

Joakim Hallin