Adaptive tuning networks with direct mapped multiple channel filter tuning

US11251765B2 · kind B2 · utility

Assignee

• pSemi Corporation · US

Inventors

• Emre Ayranci · Brooks Road, US
• Miles Sanner · San Diego, US
• Ke Li · Nanjing, CN
• James Francis McElwee · Austin, US
• Tero Tapio Ranta · San Diego, US
• Kevin Roberts · Oceanside, US
• Chih-Chieh Cheng · Poway, US

Key dates

• Filing date: Apr 17, 2020
• Grant date: Feb 15, 2022
• Expiry date: Apr 17, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W28/065
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A flexible multi-path RF adaptive tuning network switch architecture that counteracts impedance mismatch conditions arising from various combinations of coupled RF band filters, particularly in a Carrier Aggregation-based (CA) radio system. In one version, a digitally-controlled tunable matching network is coupled to a multi-path RF switch in order to provide adaptive impedance matching for various combinations of RF band filters. Optionally, some or all RF band filters include an associated digitally-controlled filter pre-match network to further improve impedance matching. In a second version, some or all RF band filters coupled to a multi-path RF switch include a digitally-controlled phase matching network to provide necessary per-band impedance matching. Optionally, a digitally-controlled tunable matching network may be included on the common port of the multi-path RF switch to provide additional impedance matching capability. In a third version, CA direct mapped adaptive tuning networks include filter tuning blocks for selected lower frequency bands.