Invention Grant
- Patent Title: Multiple-band matching network for a Doherty power amplifier and amplifiers, transmitters, and base stations using the same
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Application No.: US15279669Application Date: 2016-09-29
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Publication No.: US09966902B2Publication Date: 2018-05-08
- Inventor: Chia Sam Wey
- Applicant: Nokia Solutions and Networks Oy
- Applicant Address: FI Espoo
- Assignee: Nokia Solutions and Networks Oy
- Current Assignee: Nokia Solutions and Networks Oy
- Current Assignee Address: FI Espoo
- Agency: Harrington & Smith
- Main IPC: H03F3/68
- IPC: H03F3/68 ; H03F1/02 ; H03F3/21 ; H03F1/56 ; H04B1/04

Abstract:
An apparatus includes a Doherty PA having an input, an output manifold, and peaking and main amplifier paths. The peaking amplifier path includes peaking amplifier(s) configured to amplify signals over multiple frequency bands. A main amplifier path is separate from the peaking amplifier path until the main amplifier path terminates in the output manifold. The main amplifier path includes main amplifier(s), configured to amplify signals over the multiple frequency bands, and a multiple-band matching network coupled to the output of the main amplifier(s) and terminating in the output manifold. The multiple-band matching network includes multiple signal paths, one for each of the multiple frequency bands. Each signal path includes circuitry configured to pass signals to the output manifold from only a unique one of the multiple frequency bands and to reject signals from others of the multiple frequency bands. The circuitry for each signal path includes a resonant tank.
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