Passive radio frequency signal handler
US9362883B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2014 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Jun 12, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F1/565
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A multi-stage signal handling circuit. Operating as a combiner or splitter, first stage transformers match low input impedance at a first set of differential terminals, and second stage transformers match expected higher impedance at second terminal(s). Transformer windings are mirror image, vertically aligned, meandering conductive tracks disposed on opposite sides of a PCB. Air columns above or below the conductive tracks reduce ground plane effects. A capacitor provided across the differential input terminals of each transformer is chosen to further match the power amplifier output, including consideration of inherent inductance presented by the circuit tracks and vias between transformer sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.