Telefonaktiebolaget Lm Ericsson (publ)

Joakim Plahn

Richard Hellberg

Magnus Nilsson

Torsten John Carlsson

Peter Jakobsson

Mats Klingberg

Martin Isberg

Dandan Hao

Per Ingelhag

Andrzej Sawicki

Peter Svensson

Sten Wallin

Martin Schöön

Agneta Ljungbro

Örjan Renström

In an example embodiment, a system comprises a chain of serially coupled nodes, including a central processing node (CPN) and one or more radio communications nodes (RCNs). The CPN couples to a first RCN in the chain via a dielectric waveguide (DWG) link and any further RCNs in the chain are successively connected in serial fashion from the first RCN via further (DWG) links. The CPN generates outbound radio carrier signals that are waveguide-propagated in a downstream direction of the chain, for over-the-air (OTA) by targeted ones of the RCNs, while radio carrier signals received via OTA reception by respective ones of the RCNs are waveguide propagated as inbound radio signals in an upstream direction of the chain, for processing by the CPN. Advantages from he contemplated system include greatly simplified implementation of the RCNs, with lower cost and power consumption. Further, strategic placement of failover CPNs and DWG links provide for continued operation in the face of CPN or DWG link failures.

Method and apparatus for radio communications

It is presented a power amplifier assembly comprising; a radio frequency multi-order power amplifier comprising a circuit board; a grounding structure connected to the radio frequency multi-order power amplifier and comprising a recess; a combining network connected to a plurality of outputs of the radio frequency multi-order power amplifier. The combining network comprises: a plurality of input connection points, wherein each of the plurality of input connection points is connected to a respective output of the plurality of outputs of the radio frequency multi-order power amplifier; an output connection point; and a conductor arrangement comprising a plurality of conductive paths arranged between the plurality of input connection points and the output connection point; wherein at least one of the plurality of conductive paths is at least partly formed by a suspended conductor positioned in the recess of the grounding structure.

Power amplifier assembly comprising suspended strip lines

A circuit () for use in a transmitter in a base station in a wireless cellular access system, comprising a main line with a first filter () arranged in the main line with an input side () and an output side () in the main line. The circuit additionally comprises a feed forward cancellation loop with a second filter (), the cancellation loop also having an input point () and an output point (). The cancellation loop is connected to the main line with the output point () of the cancelation loop being connected to the main line on the output side () of the first filter (). Suitably, the first filter () i.e. the main line filter, is a bandpass filter.

Feed forward noise reduction in a transmitter

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Taby, Sweden

Joakim Plahn