Title:
MULTI-BAND DOHERTY AMPLIFIER USING SCHIFFMAN PHASE SHIFTER
Document Type and Number:
WIPO Patent Application WO/2022/255538
Kind Code:
A1
Abstract:
The present invention relates to a multi-band Doherty amplifier using a Schiffman phase shifter and, more particularly, to a multi-band Doherty amplifier using a Schiffman phase shifter, wherein the Schiffman phase shifter is applied to a Doherty amplifier so as to enable a narrow-band Doherty amplifier to be used in a wideband or multi-band. A multi-band Doherty amplifier using a Schiffman phase shifter according to the present invention comprises: a power divider which divides an input signal and provides the divided input signals to two paths; a carrier amplifier and a peaking amplifier, each of which amplifies the signal divided by the power divider; and a Schiffman phase shifter which generates a 90-degree phase difference signal at an input terminal or an output terminal, whereby a single Doherty amplifier is enabled to be easily used in a multi-band/multi-mode so as to lower design difficulty and promote the degree of utilization.
Inventors:
LEE DONG HO (KR)
KIM JUSUNG (KR)
GYAANG RAYMOND (KR)
KIM JUSUNG (KR)
GYAANG RAYMOND (KR)
Application Number:
PCT/KR2021/010990
Publication Date:
December 08, 2022
Filing Date:
August 19, 2021
Export Citation:
Assignee:
UNIV NAT HANBAT IND ACAD COOP FOUND (KR)
International Classes:
H03F1/02; H03F1/56; H03F3/21; H03F3/60
Foreign References:
| KR101934933B1 | 2019-01-04 | |||
| US20180076773A1 | 2018-03-15 | |||
| KR102165176B1 | 2020-10-14 | |||
| JP2014110565A | 2014-06-12 | |||
| US20080007331A1 | 2008-01-10 |
Attorney, Agent or Firm:
LEE, Un Cheol (KR)
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