A Compact Load-Modulation Amplifier for Improved Efficiency Next Generation Mobile

Ahmed M. Abdulkhaleq, Maan A. Yahya, Y. Al-Yasir, N. Ojaroudi Parchin, M. Sajedin, Syed M.H. Syed Anera, A. Rayit, I. T.E. Elfergani, R. A. Abd-Alhameed, J. Rodriguez

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Current and future mobile communications systems are aimed to increase the achieved efficiency at the backoff and to reduce the required size for the amplifier. A load modulation amplifier targeting 3.4-3.8 GHz is designed, simulated and fabricated to achieved the maximum achievable back-off efficiency from the peak power. The amplifier uses a special technique to implement the load modulation amplifier without using a quarter wave-length transmission line. The measured results showed a 48 dBm peak power with efficiencies of >75 %, >60 %, >55 % and >51 % at 0 dB, 6 dB, 8 dB and 10 dB back-off power respectively for the whole designed bandwidth. The amplifier was tested an LTE modulated signal where the Adjacent Channel Power Ratio (ACPR) was 30 dB and it was improved by utilising a digital predistortion to be 48 dB.

Original languageEnglish
Title of host publication2020 50th European Microwave Conference, EuMC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1091-1094
Number of pages4
ISBN (Electronic)9782874870590
DOIs
Publication statusPublished - 12 Jan 2021
Externally publishedYes
Event50th European Microwave Conference, EuMC 2020 - Utrecht, Netherlands
Duration: 12 Jan 202114 Jan 2021

Publication series

Name2020 50th European Microwave Conference, EuMC 2020

Conference

Conference50th European Microwave Conference, EuMC 2020
Country/TerritoryNetherlands
CityUtrecht
Period12/01/2114/01/21

Keywords

  • Doherty amplifier
  • efficiency
  • load-modulation
  • power amplifiers
  • quarter wave-length

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