This paper presents a novel doherty architecture, providing wideband efficient RF power
amplification along-with wideband class-AB second harmonic terminations for a rugged and …

8,319,569 B2 11/2012 Kojima 9,054,792 B2 6/2015 Wu et al. 9,094,102 B2 7/2015 Corman
et al. 9,362,871 B2 6/2016 Qureshi 9,473,195 B2* 10/2016 Zhan 9,577,600 B2 2/2017 …

Provided is a load modulation amplifier including: a high frequency circuit board; and on the
board, an input distri bution circuit unit (DC) including: a distributor for dividing one input …

A power amplifier cell comprising a first power amplifier, a second power amplifier and a
balun. The balun comprises a first inductor and a second inductor that define a first …

An apparatus is disclosed for an asymmetrical quadrature hybrid coupler. In an example
aspect, an apparatus comprises a quadrature hybrid coupler. The quadrature hybrid coupler …

Examples herein disclose apparatus and systems for hybrid vector based polar modulator
schemes that may use a series of polar modulators to create a system of vector modulators …

An amplifier includes at least two amplification stages coupled in parallel. Each amplification
stage includes at differential pair of amplifying MOS transistors having gates connected to a …

An apparatus is disclosed for bidirectional variable gain amplification. In an example aspect,
an apparatus comprises an antenna element of an antenna array and a wireless transceiver …

(57) ABSTRACT A multistage Doherty power amplifier and a transmitter are provided, and
the multistage Doherty power amplifier includes: a generalized carrier amplifier, which is a …