A novel reconfigurable power amplifier structure for multi-band and multi-mode portable wireless applications using a reconfigurable die and a switchable output matching network

Design of a triple-band power amplifier using a genetic algorithm and the continuous mode method

“…An obvious solution is to design multiple defined MNs with switches [1]. This approach, however, does not provide concurrent operation and has increased insertion loss due to the use of switches.…”

A compact multi-mode multi-band power amplifier with harmonic-suppression matching networks for GSM/TD-SCDMA/LTE terminals

“…Although there is no need to design a ubiquitous-coverage phone to cover excess frequency bands due to the minimum worldwide multi-mode requirements (2/2.5/ 3/4G) and region frequency multiplexing techniques, this increased complexity becomes a critical issue, especially for integrated RF front ends [4]. Moreover, PA design meets an inaccessible compromise because of the complicated combination of envelope-varying modulation schemes and multiple access techniques [5].…”

“…Moreover, PA design meets an inaccessible compromise because of the complicated combination of envelope-varying modulation schemes and multiple access techniques [5]. Over the years, many researchers have tried fulfilling strict MMMB specifications with single core by means of switchable or broadband matching schemes to provide matching optimum for specified bands [4,6]. Nonetheless, data is still scare rear and further studies are still essential to those mixed-mode applications, thus that separating PAs respectively dedicated to low and high band, is a distinct possibility to commercial applications among the reported works.…”

RF-MEMS based tri-band GaN power amplifier

“…Introduction: Recently, adaptive power amplifiers (PAs) based on tunable elements have been investigated as promising candidates for future multiband/multimode wireless communications [1][2][3][4][5][6]. The frequency reconfigurability is normally realised by using pin diode based tunable matching networks.…”

“…Consequently, these increase power consumption as well as overall cost. On the other hand, RF-MEMS based tunable matching networks are developed and can be considered as an alternative solution [3][4][5][6].…”